home *** CD-ROM | disk | FTP | other *** search
Text File | 1991-12-31 | 62.4 KB | 2,426 lines |
-
- Raster-Gr-Presentation-Attributes { 2 8 1 7 2 }
-
- DEFINITIONS ::= BEGIN
-
- EXPORTS Raster-Graphics-Attributes,
- One-Of-Four-Angles,
- One-of-Two-Angles,
- Pel-Transmission-Density,
- Measure-Pair,
- Clipping,
- Pel-Spacing,
- Spacing-Ratio,
- Image-Dimensions;
-
- Raster-Graphics-Attributes ::=SET {
-
- pel-path [0] IMPLICIT One-Of-Four-Angles OPTIONAL,
- line-progression [1] IMPLICIT One-Of-Two-Angles OPTIONAL,
- pel-transmission-density [2] IMPLICIT Pel-Transmission-Density OPTIONAL,
- initial-offset [3] IMPLICIT Measure-Pair OPTIONAL,
- clipping [4] IMPLICIT Clipping OPTIONAL,
- pel-spacing [5] Pel-Spacing OPTIONAL,
- spacing-ratio [6] IMPLICIT Spacing-Ratio OPTIONAL,
- image-dimensions [7] Image-Dimensions OPTIONAL }
-
- One-Of-Four-Angles ::=INTEGER { d0 (0),
- d90 (1),
- d180 (2),
- d270 (3) }
-
- One-Of-Two-Angles ::=INTEGER { d90 (1),
- d270 (3) }
-
- Pel-Transmission-Density ::=INTEGER {
- p6 (1), -- 6 BMU
- p5 (2), -- 5 BMU
- p4 (3), -- 4 BMU
- p3 (4), -- 3 BMU
- p2 (5), -- 2 BMU
- p1 (6), -- 1 BMU }
-
- Measure-Pair ::=SEQUENCE {
- horizontal [0] IMPLICIT INTEGER
- vertical [0] IMPLICIT INTEGER }
-
- Clipping ::= SEQUENCE {
- first-coordinate-pair [0]IMPLICIT Coordinate-Pair OPTIONAL,
- second-coordinate-pair [1]IMPLICIT Coordinate-Pair OPTIONAL }
-
- Coordinate-Pair ::=SEQUENCE {
- x coordinate INTEGER
- y coordinate INTEGER }
-
- Pel-Spacing ::=CHOICE {
- spacing [0] IMPLICIT SEQUENCE {
- length INTEGER,
- pel-spacing INTEGER },
- null [1] IMPLICIT NULL }
-
- Spacing-Ratio ::=SEQUENCE {
- line-spacing-value INTEGER
- pel-spacing-value INTEGER }
-
- Image-Dimension ::=CHOICE {
-
- width-controlled [0] IMPLICIT SEQUENCE {
- minimum-width INTEGER,
- preferred-width INTEGER },
-
- height-controlled [1] IMPLICIT SEQUENCE {
-
-
-
- Fascicle VII.6 - Rec. T.417 1
-
-
-
-
-
-
-
-
-
-
-
- minimum-height INTEGER,
- preferred-height INTEGER },
- area-controlled [2]IMPLICIT SEQUENCE {
- minimum-width INTEGER,
- preferred-width INTEGER,
- minimum-height INTEGER,
- preferred-height INTEGER,
- aspect-ratio-flag INTEGER {
- fixed (0),
- variable (1) }},
- automatic [3] IMPLICIT NULL }
-
- END
-
- Note - The following types are also defined in orther Recommendations in the T.410 Series: 'One-Of-Four-Angles',
- 'One-Of-Two-Angles', 'MeasurePair'.
-
- 8.3 Representation of coding attributes
-
- Raster-Gr-Coding-Attributes { 2 8 1 7 3 }
-
- DEFINITIONS ::= BEGIN
-
- EXPORTS Raster-Gr-Coding-Attributes,
- Compression;
-
- Raster-Gr-Coding-Attributes ::= SET {
- number-of-pels-per-line [0] IMPLICIT INTEGER OPTIONAL,
- number-of-lines [1] IMPLICIT INTEGER OPTIONAL,
- compression [2] IMPLICIT Compression OPTIONAL,
- number-of-discarded-pels [3] IMPLICIT INTEGER OPTIONAL }
-
- Compression ::=INTEGER {uncompressed (0),
- compressed (1)}
-
- END
-
- 8.4 Representation of non-basic features and non-standard defaults
-
- Raster-Gr-Profile-Attributes { 2 8 1 7 4 }
-
- DEFINITIONS ::= BEGIN
-
- EXPORTS Ra-Gr-Presentation-Feature,
- Ra-Gr-Coding-Attribute,
- Raster-Gr-Content-Defaults;
-
- IMPORTS One-Of-Four-Angles,
- One-Of-Two-Angles,
- Pel-Transmission-Density,
- Measure-Pair,
- Clipping,
- Pel-Spacing,
- Spacing-Ratio,
- Image-Dimensions;
-
- FROM Raster-Gr-Presentation-Attributes,
- Compression,
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 2 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
-
- FROM Raster-Gr-Coding-Attributes;
-
- Ra-Gr-Presentation-Feature ::= CHOICE {
- pel-path [9] IMPLICIT One-Of-Four-Angles,
- line-progression [10]IMPLICIT One-Of-Two-Angles,
- pel-transmission-density [11]IMPLICIT Pel-Transmission-Density }
-
- -- The tag values used above preserve compatibility with Group 4 Class 1 facsimile data streams.
-
- Ra-Gr-Coding-Attribute ::= CHOICE {
- compression [0] IMPLICIT Compression }
-
- -- The tag values used above preserve compatibility with Group 4 Class 1 facsimile data streams.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 3
-
-
-
-
-
-
-
-
-
-
-
- Raster-Gr-Content-Defaults ::=SET {
- pel-path [0] IMPLICIT One-Of-Four-Angles OPTIONAL,
- line-progression [1] IMPLICIT One-Of-Two-Angles OPTIONAL,
- pel-transmission-density [2] IMPLICIT Pel-Transmission-Density OPTIONAL,
- pel-spacing [5] Pel-Spacing OPTIONAL,
- spacing-ratio [6] IMPLICIT Spacing-Ratio OPTIONAL,
- compression [8] IMPLICIT Compression OPTIONAL }
-
- END
-
-
- 9 Coding schemes
-
-
- A pel array may be represented within a text unit by means of one of the following encoding schemes:
-
- - Group 4 facsimile encoding scheme;
- - Group 3 facsimile encoding schemes;
- - bitmap encoding scheme.
-
- 9.1 Group 4 facsimile encoding scheme
-
- In this encoding scheme, a pel array is encoded according to Recommendation T.6. The colours "black" and
- "white" referred to in this Recommendation should be interpreted as "foreground" and "background", or "set" and "unset",
- respectively.
-
- 9.2 Group 3 facsimile encoding scheme
-
- In these encoding schemes, a pel array is encoded according to one or two dimensional encoding schemes
- defined in Recommendation T.4. The colours "black" and "white" referred to in this Recommendation should be interpreted as
- "foreground" and "background", or "set" and "unset" respectively.
-
- When using the Recommendation T.4 one- or two-dimensional encoding scheme, the encoded data belonging to
- each content portion must be terminated by a RTC (Return to control), the format of which is defined in Recommendation
- T.4. If the total number of bits belonging to a content portion is not a multiple of eight (i.e., an integral number of octets),
- then the RTC must be followed by the minimum number of '0' bits such that the last bit aligns on an octet boundary. In
- addition, the use of EOL is required to indicate the end of encoding of each line of pels and make up codewords can be
- used recursively to encode runs of pels longer than 2624.
-
- When using the two-dimensional encoding scheme, any number of fill bits and any value of K-parameter may be
- used without declaration in coding attributes.
-
- 9.3 Bitmap encoding scheme
-
- Each element in a pel array may have one of two distinct states. These are the set state, corresponding to
- background colour. For the purpose of representing such an array within a content portion, each pel may be represented by
- a single bit which has the value '0' or '1' depending on the state of the pel. If the pel has the unset state, the value of the bit
- is '0'; otherwise the value of the bit is '1'.
-
- In the bitmap encoding scheme, each row of the resulting array of bits is encoded, within a content portion, by a
- string of octets. It the number of bits in each row of the pel array is not a multiple of eight, then it is extended by the
- minimum number of '0' bits such that the last bit aligns on an octet boundary.
-
- When the content portion is decoded, the coding attribute "number of pels per line" is used to determine the
- number of bits in each line that are significant, the remaining bits being ignored.
-
- The relationship between the order of the pels and the order of the bits within an octet is such that the first pel in
- the order of bits is allocated to the most significant bit of an octet.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 4 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- Note - This encoding scheme is distinct from the uncompressed mode of the Groups 3 and 4 facsimile encoding
- schemes.
-
-
- 10 Content layout process
-
-
- This section describes a content layout process for basic logical objects associated with raster graphics content
- architectures.
-
- Its purpose is to aid understanding of the semantics of the presentation attributes and coding attributes by
- describing the required results of such a process. However, it is not intended to specify any process that might be carried out
- in a particular implementation to achieve these results.
-
- 10.1 Introduction
-
- 10.1.1 Purpose
-
- The content layout process describes the process of laying out raster graphic content into an allocated area. This
- area is referred to as the available area and is determined by the document layout process defined in Recommendation
- T.412.
-
- The purpose of the content layout process is to convert content associated with basic logical components into
- content associated with basic layout objects.
-
- The content layout process results in the creation of a basic layout object(s) into which the content is to be
- positioned. The dimensions of each basic layout object are returned to the document layout process, which determines the
- precise position of that basic layout object within the available area.
-
- One of two methods can be followed for laying out the content of a basic logical object. These methods are:
-
- - the fixed dimension content layout method;
-
- - the scalable dimension content layout method.
-
- The choice of method depends on the particular presentation attributes associated with the basic logical object.
-
- 10.1.2 Available area
-
- The content layout process is constrained by the available area. The maximum dimensions that a basic layout
- object can take are constrained by the dimensions of the available area.
-
- During the layout of the content associated with a basic logical object into a basic layout object, the following
- cases can occur:
-
- - the formatted processable content fits into the available area;
-
- - the formatted processable content does not fit into the dimensions of the available area. In this case, a
- new available area is required.
-
- 10.1.3 Presentation attributes
-
- The content layout process takes into account the presentation attributes applying to the basic logical object with
- which the content is associated.
-
- The presentation attributes applying to the content layout process can be specified in the generic layout structure
- and presentation styles. The values of these presentation attributes are determined according to the defaulting rules specified
- in Recommendation T.412.
-
- 10.1.4 Coding attributes
-
- The content layout process takes into account the coding attributes applying to the content portion.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 5
-
-
-
-
-
-
-
-
-
-
-
- 10.1.5 Raster graphics content architecture classes
-
- The content layout process is only specified for basic logical objects associated with the formatted processable
- raster graphics content architecture class. The content layout process does not modify the form of the content.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 6 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- 10.1.6 Layout of the content
-
- For the raster graphics formatted processable content architecture class, one case of laying out the content into
- basic objects is possible:
-
- - single basic logical to single basic layout object: the content of a single basic logical object can be laid out
- into a single basic layout object and is the only content associated with this basic layout object.
-
- 10.2 Notation
-
- The following notation is used in the description of the description of the determination of block dimensions:
- BDH Horizontal block dimension
- BDV Vertical block dimension.
- NLC Number of lines of the clipped array
- NPC Number of pels per line of the clipped array
- AAH Horizontal dimension of available area
- AAV Vertical dimension of available area
- PS Pel spacing
- SR Spacing ratio
-
- 10.3 The fixed dimension content layout method
-
- If the value of the attribute "pel spacing" is specified as other than 'null', the fixed dimension content layout method
- is followed.
- The fixed dimension content layout method creates a block with dimensions that satisfy the values of the following
- attributes:
- - the presentation attributes (defined in Section 6):
- - "clipping";
- - "pel path";
- - "pel spacing";
- - "spacing ratio";
- - the coding attributes (defined in 7.2):
- - "number of lines";
- - "number of pels per line".
- The fixed dimension content layout process creates a block of the minimum dimensions that are required to
- accommodate the clipped pel array in accordance with the pel spacing and line spacing. Note that the pel spacing is explicitly
- specified by the attribute "pel spacing", whereas the line spacing is determined from the pel spacing and the attribute
- "spacing ratio".
- The horizontal and vertical block dimensions are determined, such that the reference areas of all the pels of the
- clipped pel array completely fill the basic layout object. The block dimensions depend on the pel path, pel spacing, spacing
- ratio, number of pels per line and number of lines as defined in Table 4/T.417.
-
- TABLE 4/T.417
-
- Dimensions of a basic layout object
- w
- ┌─────────────────┬───────────────────┬───────────────────┐
- │ Pel path │ Horizontal block │ Vertical block │
- │ │ dimension (BDH) │ dimension (BDV) │
- ├─────────────────┼───────────────────┼───────────────────┤
- │ 0, 180 │ NPC * PS │ NLC * SR * PS │
- │ 90, 270 │ NLC * PS * SR │ NPC * PS │
- └─────────────────┴───────────────────┴───────────────────┘
-
- Note - The notation used in this table is described in 10.2.
-
-
-
-
- Fascicle VII.6 - Rec. T.417 7
-
-
-
-
-
-
-
-
-
-
-
- If one of the following conditions occurs:
-
- BDH > AAH or BDV > AAV
-
- then the block will not fit into the available area. It is then the responsibility of the
- document layout process to determine whether or not the content layout process is to be
- repeated for an alternative available area.
-
- 10.4 The scalable dimension content layout method
-
- If the value of the attribute "Pel spacing" is specified as 'null', the scalable
- content layout method is followed. In this case the pel spacing will depend upon the
- value of the attribute "image dimensions" and the available area provided by the document
- layout process.
- The aim of the content layout process for scalable dimension content portions is to
- lay out the content, within the available area, in a basic layout object with the maximum
- dimensions possible, considering the image dimensions and the spacing ratio specified.
- The block dimensions are determined by:
- a) the presentation attributes values (defined in Section 6):
- - "clipping";
- "pel path";
- - "image dimensions";
- - "spacing ratio";
- b) the coding attributes (defined in 7.2):
- - "number of lines";
- - "number of pels per line".
- The scalable dimension content layout method first determines the aspect ratio of
- the clipped pel array, from the "number of pels per line" and "number of lines", taking
- into consideration the "spacing ratio":
-
- w
- NPC
- aspect ratio = ────────
- NLC * SR
-
-
- Determination of the dimensions of the basic layout object depends on the value of
- the presentation attribute "image dimensions". The four possible cases are illustrated in
- Figures 4/T.417 to 7/T.417 and are described below:
- a) The attribute "image dimensions" specifies a value for the parameter "width
- controlled". In this case the width of the basic layout object will be within
- the range specified by the originator.
- The determination of basic layout object dimentions is constrained by the
- range of allowed widths given by the value of the parameter "width
- controlled", the dimensions of the available area and the aspect ratio of the
- clipped array.
- The dimension of the basic layout object shall be determined such that: the
- basic layout object fits into the available area; the aspect ratio of the
- basic layout object is the same as that of the clipped pel array; and the
- width of the basic layout object has a value that is within the range of
- allowed widths. Also, the width of the basic layout object is determined such
- that the deviation from the value of "preferred width", specified by the
- parameter "width controlled", is as small as possible.
- b) The presentation attribute "image dimensions" specifies a value for the
- parameter "height controlled". In this case the height of the basic layout
- object will be within the range specified by the originator.
- The determination of basic layout object dimensions is constrained by the
- range of allowed heights given by the value of the paramenter "height
- controlled", the dimensions of the available area and the aspect ratio of the
-
-
-
- 8 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- clipped pel array.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 9
-
-
-
-
-
-
-
-
-
-
-
- The dimensions of the basic layout object shall be determined such that: the
- basic layout object fits into the available area; the aspect ratio of the
- basic layout object is the same as that of the clipped pel array; and the
- height of the basic layout object has a value that is within the range of
- allowed heights. Also, the height of the basic layout object is determined
- such that the deviation from the value of "preferred height", specified by the
- parameter "height controlled", is as small as possible.
-
- c) The attribute "image dimensions" specifies a value for the parameter "area
- controlled". In this case the dimensions of the basic layout object will be
- within the range specified by the originator. In particular, this can be used
- to ensure the basic layout object will have a fixed size.
-
- The determination of basic layout object dimensions is constrained by the
- range of allowed heights and widths given by the value of the parameter "area
- controlled", the dimensions of the available area and, depending upon the
- value of the "aspect ratio flag" of the parameter "area controlled", by the
- aspect ratio of the clipped pel array.
-
- The dimensions of the basic layout object shall be determined such that: the
- basic layout object fits into the available area; the width of the basic
- layout object has a value that is within the range of allowed widths; and the
- height of the basic layout object has a value that is within the range of
- allowed widths; and the height of the basic layout object has a value that is
- within the range of allowed heights. If the value of "aspect ratio flag" is
- 'fixed' there is the further constraint to the baisc layout object dimensions,
- that the aspect ratio of the basic layout object must be the same
- as that of the clipped pel array. Also both the width and height of the basic
- layout onbject shall be chosen such, that their deviations from their
- preferred values, specified by the parameter "area controlled", are both as
- small as possible.
-
- d) The attribute "image dimensions" specifies a value for the parameter
- "automatic". In this case the dimensions of the basic layout object will be
- automatically adjusted to the page layout.
-
- The determination of basic layout object dimensions is constrained by the
- dimensions of the available area and the aspect ratio of the clipped pel
- array.
-
- The dimensions of the basic layout object have to be determined such that: the
- basic layout object fits into the available area; the width of the basic
- layout object is given the same value as the dimension of the available area
- in the same direction; and the height of the basic layout object is determined
- such, that the aspect ratio of the basic layout object is the same as that of
- the clipped pel array.
-
- If the given constraints cannot be met, then the document layout process
- (defined in Recommendation T.412) is responsible for determining if the
- content layout method is to be repeated for an alternative available area.
-
- The dimensions of a basic layout object are restricted to integral multiples
- of 1 SMU.
-
-
-
-
-
-
-
-
-
-
-
-
-
- 10 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
-
-
-
- FIGURE 4/T.417
-
- Diagrams used to illustrate the process of determining
- the basic layout object dimensions
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 11
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- FIGURE 5/T.417
-
- Layout process for the presentation attribute "image dimensions"
- when a value is specified for the parameter "automatic"
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 12 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
-
- FIGURE 6/T.417
-
- Layout process for the presentation attribute "image dimensions"
- when a value is specified for the parameter "width controlled"
- or "height controlled"
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 13
-
-
-
-
-
-
-
-
-
-
-
- FIGURE 7/T.417
-
- Layout process for the presentation attribute "image dimensions"
- when a value is specified for the parameter "area controlled"
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 14 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- 11 Content imaging process
-
- This section describes a content imaging process for basic layout objects associated
- with raster graphics content architectures.
- Its purpose is to aid understanding of the semantics of the shared and layout
- presentation attributes and coding attributes by describing the required results of such
- a process. However, it is not intended to specify any process that might be carried out
- in a particular implementation to achieve these results.
-
- 11.1 Introduction
-
- The content imaging process is only concerned with the layout structues, the
- presentation styles and the content of basic layout components conforming to this
- Recommendation.
- The content imaging process is applicable to basic layout objects associated with
- the formatted and formatted processable raster graphics content architecture classes.
-
- 11.2 Content imaging process for formatted form
-
- This section describes how the image of the content is influenced by the various
- presentation and coding attributes applying to the formatted raster graphics content
- architecture class.
- The array of pels to be imaged consists only of those pels of the interchanged pel
- array which remain after the pels at the beginning of each line, specified by coding
- attribute "Number of discarded pels", have been subtracted. The first pel of this array
- is positioned at the initial point.
- The initial point is determined by the attribute "initial offset".
- Only the pels, which are positioned completely within the basic layout object are
- imaged.
-
- 11.3 Content imaging process for formatted processable form
-
- This section describes how the image of the content is influenced by the various
- presentation and coding attributes applying to the formatted processable raster graphics
- content architecture class.
- The clipped pel array is imaged in the basic layout object with the first pel at the
- initial point.
- The initial point is determined by the pel path, line progression and by the
- dimensions of the basic layout object, as defined in Table 2/T.417.
- The pel spacing is defined as the width of the basic layout object divided by the
- number of pels in a line of the clipped pel array.
- The line spacing is defined as the height of the basic layout object divided by the
- number of lines in the clipped pel array.
-
- 12 Definition of raster graphics content architecture classes
-
- This section defines the two classes of raster graphics content architectures
- described in 4:
- - formatted raster graphics content architecture class;
- - formatted processable raster graphics content architecture class.
- Tables 5/T.417 and 6/T.417 specify the categories of presentation and content
- portion attributes that pertain to these content architecture classes. Content
- architecture levels for use in application profiles can be defined from these classes
- using the rules specified in Recommenda- tion T.411.
-
-
-
- Fascicle VII.6 - Rec. T.417 15
-
-
-
-
-
-
-
-
-
-
-
-
- 12.1 Summary of raster graphic presentation attributes
-
- Table 5/T.417 contains a list of raster graphics presentation attributes, and
- identifies, for each content architecture class, those which are defaultable and those
- which are not applicable.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 16 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- TABLE 5/T.417
-
- Raster graphics presentation attributes
- w
- ┌──────────────────────────────────────────────┬──────────────────────────────
- ───┐
- │ │ Content architecture │
- │ │ class │
- │ Presentation attribute ├───────────────┬─────────────────┤
- │ │ Formatted │ Formatted │
- │ │ form │processable form │
- ├──────────────────────────────────────────────┼───────────────┼─────────────────┤
- │ Pel path │ D │ D │
- │ │ │ │
- │ Line progression │ D │ D │
- │ │ │ │
- │ Pel transmission density │ D │ - │
- │ │ │ │
- │ Initial offset │ D │ - │
- │ │ │ │
- │ Pel spacing │ - │ D │
- │ │ │ │
- │ Spacing ratio │ - │ D │
- │ │ │ │
- │ Clipping │ - │ D │
- │ │ │ │
- │ Image dimensions │ - │ D │
- └──────────────────────────────────────────────┴───────────────┴─────────────────┘
-
- Note - The notation used in this table is:
- - Non applicable
- D Applicable and defaultable
-
- 12.2 Summary of raster graphic content portion attributes
-
- Table 6/T.417 contains a list of raster graphics content portion attributes, and
- identifies, for each content architecture clas , those which are mandatory, non-
- mandatory, defaultable and not applicable.
-
- TABLE 6/T.417
-
- Raster graphics content portion attributes
- w
- ┌──────────────────────────────────────────────┬──────────────────────────────
- ───┐
- │ │ Content architecture │
- │ │ class │
- │ Content portion attribute ├───────────────┬─────────────────┤
- │ │ Formatted │ Formatted │
- │ │ form │processable form │
- ├──────────────────────────────────────────────┼───────────────┼─────────────────┤
- │ Number of pels per line │ D │ M │
- │ │ │ │
- │ Type of coding │ D │ D │
- │ │ │ │
- │ Compression │ D │ D │
- │ │ │ │
- │ Number of discarded pels │ D │ - │
- │ │ │ │
- │ Number of lines │ - │ NM │
- └──────────────────────────────────────────────┴───────────────┴─────────────────┘
-
- Note 1 - The notation used in this table is:
-
-
-
- Fascicle VII.6 - Rec. T.417 17
-
-
-
-
-
-
-
-
-
-
-
- - Not applicable;
- D Applicable and defaultable;
- NM Applicable and non-mandatory;
- M Applicable and mandatory.
-
- Note 2 - The attribute "compression" is only applicable if the value of the
- attribute "type of coding" is 'T.6 encoding' of 'T.4 two dimensional encoding'.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 18 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- ANNEX A
-
- (to Recommendation T.417)
-
- Summary of raster graphics content architecture classes
-
- (Informative)
-
-
- This Annex summarizes the presentation attributes and content portion attributes
- that apply to each of the two content architecture classes (formatted and formatted
- processable) defined in Section 12, together with their permissible values and
- default values.
-
- The purpose of this Annex is to facilitate the definition of raster graphisc content
- architecture levels for use in document application profiles (see Recommendation T.411).
-
- A.1 Formatted raster graphics content architecture class
-
- Content pertaining to the formatted raster graphics content architecture class may
- only be associated with basic layout components.
-
- A.1.1Presentation attributes
- w
- ┌─────────────────────┬────────────────────────┬────────────────────┐
- │ Attribute │ Permissible values │ Default value │
- ├─────────────────────┼────────────────────────┼────────────────────┤
- │Pel path │0, 90, 180, 270 degrees │ 0 degrees │
- ├─────────────────────┼────────────────────────┼────────────────────┤
- │Line progression │90, 270 degrees │ 270 degrees │
- ├─────────────────────┼────────────────────────┼────────────────────┤
- │Pel transmission │6, 5, 4, 3, 2, │ 6 BMU │
- │density │1 BMU │ │
- ├─────────────────────┼────────────────────────┼────────────────────┤
- │Initial offser │(Any integer, │ See Note │
- │ │ any integer) │ │
- └─────────────────────┴────────────────────────┴────────────────────┘
-
- Note - The default value of "initial offset" depends upon the pel path and
- line progression as defined in Table 2/T.417.
-
- A.1.2Content portion arttributes
- w
- ┌─────────────────────┬────────────────────┬────────────────────┐
- │ Attribute │ Permissible values │ Default value │
- ├─────────────────────┼────────────────────┼────────────────────┤
- │Number of pels per │Any positive integer│See Note 1 │
- │line │ │ │
- ├─────────────────────┼────────────────────┼────────────────────┤
- │Number of discarded │Any non-negative │See Note 2 │
- │pels │integer │ │
- ├─────────────────────┼────────────────────┼────────────────────┤
- │Type de coding │Rec. T.6 encoding │Rec. T.6 encoding │
- ├─────────────────────┼────────────────────┼────────────────────┤
- │Compression │Compressed, │Compressed as in │
- │ │uncompressed as in │Rec. T.6 │
- │ │Rec. T.6 │ │
- └─────────────────────┴────────────────────┴────────────────────┘
-
- Note 1 - The default number of pels per line depends upon the pel transmission
- density as defined in Table 3/T.417.
-
- Note 2 - If the number of pels per line exceeds the image line length, the
- default number of discarded pels is half the excess number of pels, otherwise
-
-
-
- Fascicle VII.6 - Rec. T.417 19
-
-
-
-
-
-
-
-
-
-
-
- it is zero.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 20 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- A.2 Formatted processable raster graphics content architecture class
-
-
- Content pertaining to the formatted processable raster graphics form content
- architecture class may be associated with basic layout or logical objects.
-
-
- A.2.1Presentation attributes
-
- w
- ┌─────────────────────────────────┬─────────────────────────┬─────────────────
- ┐
- │ Attribute │ Permissible values │ Default value │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Pel path │0, 90, 180, 270 degrees │ 0 degrees │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Line progression │90, 270 degrees │ 270 degrees │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Pel spacing │(Any positive integer, │ (4,1) SMU │
- │ │any positive integer) │ │
- │ │SMU, 'null' │ │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Spacing ratio │(Any positive integer, │ (1,1) │
- │ │any positive integer │ │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Clipping │ │ See Note 1 │
- │ First pair │(Any non-negative integer│ │
- │ │any non-negative integer)│ │
- │ Second pair │(Any non-negative integer│ │
- │ │any non-negative integer)│ │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Image dimensions │See Note 2 │ Automatic │
- │ │ │ │
- │ Width controlled │ │ │
- │ Minimum width │Any non-negative integer │ │
- │ Preferred width │Any non-negative integer │ │
- │ │ │ │
- │ Height controlled │ │ │
- │ Minimum height │Any non-negative integer │ │
- │ Preferred height │Any non-negative integer │ │
- ├─────────────────────────────────┼─────────────────────────┼─────────────────┤
- │ Area controlled │ │ │
- │ Minimum height │Any non-negative integer │ │
- │ Preferred height │Any non-negative integer │ │
- │ Minimum width │Any non-negative integer │ │
- │ Preferred width │Any non-negative integer │ │
- │ Aspect ratio flag │Variable, fixed │ │
- │ │ │ │
- │ Automatique │Null │ │
- └─────────────────────────────────┴─────────────────────────┴─────────────────┘
-
- Note 1 - The default value of "clipping" is the first coordinate in the content
- portion (0,0) and the last coordinate (N-1, L-1), where N is number of pels per line
- and L is number of lines.
-
- Note 2 - Minimum values must not be greater than preferred values.
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 21
-
-
-
-
-
-
-
-
-
-
-
- A.2.2Content portion attributes
-
- w
- ┌─────────────────────┬──────────────────────────────┬────────────────────┐
- │ Attribute │ Permissible values │ Default value │
- ├─────────────────────┼──────────────────────────────┼────────────────────┤
- │Number of pels per │Any positive integer │ None │
- │line │ │ │
- ├─────────────────────┼──────────────────────────────┼────────────────────┤
- │Number of lines │Any positive integer │ None │
- ├─────────────────────┼──────────────────────────────┼────────────────────┤
- │Type of coding │Bitman encoding, │ Rec. T.6 encoding │
- │ │Rec. T.4 encoding (one-dim.), │ │
- │ │Rec. T.4 encoding (two dim.), │ │
- │ │Rec. T.6 encoding │ │
- ├─────────────────────┼──────────────────────────────┼────────────────────┤
- │Compression │Compressed, uncompressed as │ Compressed as in │
- │ │in Rec. T.6 │ Rec. T.6 │
- │ │ │ See Note │
- └─────────────────────┴──────────────────────────────┴────────────────────┘
-
- Note - The attribute "compression" is only applicable if the value of the
- attribute "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional
- encoding'.
-
-
-
-
-
-
- ANNEX B
-
- (to Recommendation T.417)
-
- Recommendations for the development of raster graphics content
- architecture levels in document application profiles
-
- (Informative)
-
-
-
- This section provides examples of the definition of four raster graphics content
- architecture levels, in accordance with the rules specified in Recommendation T.411:
-
- - RF-0 is an example of a content architecture level belonging to the formatted
- form content architecture class. RF-0 is identical to the content architecture
- used is the context of the document application profile defined in
- Recommendation T.503.
-
- - RF-1 is an example of a content architecture level belonging to the formatted
- form content architecture class. RF-1 is identical to the content architecture
- used in the context of the document application profile defined in
- Recommendation T.501.
-
- - RP-0 is an example of a content architecture level belonging to the formatted
- processable content architecture class. Content pertaining to this level may
- be laid out using the fixed dimension layout method.
-
- - RP-1 is an example of a content architecture level belonging to the formatted
- processable content architecture class. Content pertaining to this level may
- be laid out using either the fixed dimension layout method (defined in 10.3)
- or the scalable dimension layout method (defined in 10.4).
-
-
-
-
- 22 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- Note - The application profile may have to specify additional rules for the use of
- these content architecture levels in particular applications.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 23
-
-
-
-
-
-
-
-
-
-
-
- B.1 Raster graphics content architecture level RF-O
-
- RF-0 is a content architecture level derived from the formatted form raster graphics
- content architecture class.
-
- B.1.1 Presentation attributes
- w
- ┌─────────────────────────┬─────────────────┬────────────────┬────────────────
- ┐
- │ Attribute │ Basic values │Non-basic values│ Default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Pel path │ 0 degrees │ None │ Standard │
- │ │ │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Line progression │ 270 degrees │ None │ Standard │
- │ │ │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Pel transmission │ 6 BMU │ 5, 4, 3, BMU │ Standard │
- │ density │ │ │ default value │
- └─────────────────────────┴─────────────────┴────────────────┴────────────────┘
-
- B.1.2Content portion attributes
- w
- ┌─────────────────────────┬─────────────────┬────────────────┬────────────────
- ┐
- │ Attribute │ Basic values │Non-basic values│ Default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Number of pels per line │Any positive │None │ Standard │
- │ │integer │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Number of discarded pels│Any positive │None │ Standard │
- │ │integer │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Type of coding │Rec. T.6 encoding│None │ Standard │
- │ │ │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Compression │compressed as in │Uncompressed │ Standard │
- │ │Rec. T.6 │as in Rec. T.6 │ default value │
- └─────────────────────────┴─────────────────┴────────────────┴────────────────┘
-
- B.2 Raster graphics content architecture level RF-1
-
- RF-1 is a content architecture level derived from the formatted form raster graphics
- content architecture class.
-
- B.2.1Presentation attributes
- w
- ┌─────────────────────────┬─────────────────┬────────────────┬────────────────
- ┐
- │ Attribute │ Basic values │Non-basic values│ Default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Pel path │ 0 degrees │ None │ Standard │
- │ │ │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Line progression │ 270 degrees │ None │ Standard │
- │ │ │ │ default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Pel transmission │ 5, 4 BMUs │ 6, 3, 2, 1 BMUs│ None │
- │ density │ │ │ See Note │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Initial offset │ Any integer │ None │ Standard │
- │ │ Any integer │ │ default value │
- └─────────────────────────┴─────────────────┴────────────────┴────────────────┘
-
-
-
- 24 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
-
- Note - "Pel transmission density" is specified as 'mandatory' for raster graphics
- content architecture level RF-1.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 25
-
-
-
-
-
-
-
-
-
-
-
- B.2.2Content portion attribute
-
- w
- ┌─────────────────────────┬─────────────────┬────────────────┬────────────────
- ┐
- │ Attribute │ Basic values │Non-basic values│ Default value │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Number of pels per line │Any positive │None │ None │
- │ │integer │ │ See Note │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Type of coding │Rec. T.6 encoding│None │ None │
- │ │ │ │ See Note │
- ├─────────────────────────┼─────────────────┼────────────────┼────────────────┤
- │ Compression │Compressed as in │Uncompressed │ Standard │
- │ │Rec. T.6 │as in Rec. T.6 │ default value │
- └─────────────────────────┴─────────────────┴────────────────┴────────────────┘
-
-
- Note - "Number of lines per line" and "type of coding" are specified as 'mandatory'
- for raster graphics content architecture level RF-1.
-
-
- B.3 Raster graphics content architecture level RP-0
-
-
- RP-0 is a raster graphics content architecture level derived from the formatted
- processable content architecture class; it is laid out using the fixed dimension method
- of the processable content layout process.
-
-
- B.3.1Presentation attributes
-
- w
- ┌────────────────────────┬──────────────────────────┬─────────────────┬───────
- ────────┐
- │ Attribute │ Basic values │Non-basic values │ Default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Pel path │0, 90, 180, 270 degrees │ None │Standard
- │
- │ │ │ │default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Line progression │90, 270 degrees │ None │Standard
- │
- │ │ │ │default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Pel spacing │(Any positive integer, │ None │Standard
- │
- │ │any positive integer) │ │default
- value │
- │ │SMU │ │
- │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Spacing ratio │(Any positive integer, │ None │Standard
- │
- │ │any positive integer │ │default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Clipping │ │ None │Standard
- │
- │ First pair │(Any non-negative integer,│ │default
-
-
-
- 26 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- value │
- │ │any non-negative integer) │ │
- │
- │ Second pair │(Any non-negative integer,│ │
- │
- │ │any non-negative integer) │ │
- │
- └────────────────────────┴──────────────────────────┴─────────────────┴───────────────┘
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 27
-
-
-
-
-
-
-
-
-
-
-
- B.3.2Content portion attributes
-
- w
- ┌─────────────────┬──────────────────────┬────────────────────────┬───────────
- ────┐
- │ Attribute │ Basic values │ Non-basic values │ Default value │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Number of pels │Any positive integer │None │None │
- │per line │ │ │ │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Number of lines │Any positive integer │None │None │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Type of coding │Rec. T.6 encoding │Bitman encoding │Standard │
- │ │ │Rec. T.4 encoding │default value │
- │ │ │(one-dimensional) │ │
- │ │ │Rec. T.4 encoding │ │
- │ │ │(two-dimensional) │ │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Compression │Compressed as │ Uncompressed as │Standard │
- │See Note │in Rec. T.6 │ in Rec. T.6 │default value │
- └─────────────────┴──────────────────────┴────────────────────────┴───────────────┘
-
- Note - The attribute "compression" is only applicable if the value of the attribute
- "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional encoding'.
-
-
- B.4 Raster graphics content architecture level RP-1
-
-
- RP-1 is a raster graphics content architecture level derived from the formatted
- processable raster graphics content architecture class; it is laid out using either the
- fixed or scalable dimension methods of the processable content layout process (depending
- upon the value of "pel spacing").
-
-
- B.4.1Presentation attributes
-
- w
- ┌────────────────────────┬──────────────────────────┬─────────────────┬───────
- ────────┐
- │ Attribute │ Basic values │Non-basic values │ Default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Pel path │0, 90, 180, 270 degrees │ None │Standard
- │
- │ │ │ │default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Line progression │90, 270 degrees │ None │Standard
- │
- │ │ │ │default
- value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Pel spacing │(Any positive integer, │ None │Standard
- │
- │ │any positive integer) │ │default
- value │
- │ │or 'null' │ │
- │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Spacing ratio │(Any positive integer, │ None │Standard
- │
- │ │any positive integer) │ │default
-
-
-
- 28 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-
-
- value │
- └────────────────────────┴──────────────────────────┴─────────────────┴───────────────┘
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Fascicle VII.6 - Rec. T.417 29
-
-
-
-
-
-
-
-
-
-
-
- w
- ┌────────────────────────┬──────────────────────────┬─────────────────┬───────────────┐
- │ Attribute │ Basic values │Non-basic values │ Default value │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Clipping │ │ None │Standard │
- │ │ │ │default value │
- │ First pair │(Any non-negative integer,│ │ │
- │ │any non-negative integer) │ │ │
- │ Second pair │(Any non-negative integer,│ │ │
- │ │any non-negative integer) │ │ │
- ├────────────────────────┼──────────────────────────┼─────────────────┼───────────────┤
- │ Image dimensions │See Note │ None │Standard │
- │ │ │ │default value │
- │ Width controlled │ │ │ │
- │ Minimum width │Any non-negative integer │ None │ │
- │ Preferred width │Any non-negative integer │ None │ │
- │ │ │ │ │
- │ Height controlled │ │ │ │
- │ Minimum height │Any non-negative integer │ None │ │
- │ Preferred height │Any non-negative integer │ None │ │
- │ │ │ │ │
- │ Area controlled │ │ │ │
- │ Minimum height │Any non-negative integer │ None │ │
- │ Preferred height │Any non-negative integer │ None │ │
- │ Minimum width │Any non-negative integer │ None │ │
- │ Preferred width │Any non-negative integer │ None │ │
- │ Aspect ratio flag │Variable, fixed │ None │ │
- │ │ │ │ │
- │ Automatic │Null │ │ │
- └────────────────────────┴──────────────────────────┴─────────────────┴───────────────┘
-
- Note - Minimum values must not be greater than preferred values.
-
-
-
- B.4.2Content portion attributes
- w
- ┌─────────────────┬──────────────────────┬────────────────────────┬───────────
- ────┐
- │ Attribute │ Basic values │ Non-basic values │ Default value │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Number of pels │Any positive integer │None │None │
- │per line │ │ │ │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Number of lines │Any positive integer │None │None │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Type of coding │Rec. T.6 encoding │Bitman encoding │Standard │
- │ │ │Rec. T.4 encoding │default value │
- │ │ │(one-dimensional) │ │
- │ │ │Rec. T.4 encoding │ │
- │ │ │(two-dimensional) │ │
- ├─────────────────┼──────────────────────┼────────────────────────┼───────────────┤
- │Compression │Compressed as │ Uncompressed as │Standard │
- │See Note │in Rec. T.6 │ in Rec. T.6 │default value │
- └─────────────────┴──────────────────────┴────────────────────────┴───────────────┘
-
- Note - The attribute "compression" is only applicable if the value of the attribute
- "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional encoding'.
-
-
-
-
-
-
-
-
- 30 Fascicle VII.6 - Rec. T.417
-
-
-
-
-
-