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OS/2 Shareware BBS: Multimed
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fest-141.zip
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festival
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pauses.scm
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1999-05-30
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; ;;
;;; Centre for Speech Technology Research ;;
;;; University of Edinburgh, UK ;;
;;; Copyright (c) 1996,1997 ;;
;;; All Rights Reserved. ;;
;;; ;;
;;; Permission is hereby granted, free of charge, to use and distribute ;;
;;; this software and its documentation without restriction, including ;;
;;; without limitation the rights to use, copy, modify, merge, publish, ;;
;;; distribute, sublicense, and/or sell copies of this work, and to ;;
;;; permit persons to whom this work is furnished to do so, subject to ;;
;;; the following conditions: ;;
;;; 1. The code must retain the above copyright notice, this list of ;;
;;; conditions and the following disclaimer. ;;
;;; 2. Any modifications must be clearly marked as such. ;;
;;; 3. Original authors' names are not deleted. ;;
;;; 4. The authors' names are not used to endorse or promote products ;;
;;; derived from this software without specific prior written ;;
;;; permission. ;;
;;; ;;
;;; THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK ;;
;;; DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ;;
;;; ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT ;;
;;; SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE ;;
;;; FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES ;;
;;; WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN ;;
;;; AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ;;
;;; ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF ;;
;;; THIS SOFTWARE. ;;
;;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Predicting pause insertion
(define (Pauses utt)
"(Pauses utt)
Insert pauses where required."
(let ((rval (apply_method 'Pause_Method utt)))
(cond
(rval rval) ;; new style
(t
(Classic_Pauses utt)))))
(define (Classic_Pauses utt)
"(Pauses UTT)
Predict pause insertion."
(let ((words (utt.relation.items utt 'Word)) lastword tpname)
(if words
(begin
(insert_initial_pause utt) ;; always have a start pause
(set! lastword (car (last words)))
(mapcar
(lambda (w)
(let ((pbreak (item.feat w "pbreak"))
(emph (item.feat w "R:Token.parent.EMPH")))
(cond
((or (string-equal "B" pbreak)
(string-equal "BB" pbreak))
(insert_pause utt w))
; ((string-equal emph "1")
; (insert_pause utt w))
((equal? w lastword)
(insert_pause utt w)))))
words)
;; The embarassing bit. Remove any words labelled as punc or fpunc
(mapcar
(lambda (w)
(let ((pos (item.feat w "pos")))
(if (or (string-equal "punc" pos)
(string-equal "fpunc" pos))
(let ((pbreak (item.feat w "pbreak"))
(wp (item.relation w 'Phrase)))
(if (and (string-matches pbreak "BB?")
(item.relation.prev w 'Word))
(item.set_feat
(item.relation.prev w 'Word) "pbreak" pbreak))
(item.relation.remove w 'Word)
;; can't refer to w as we've just deleted it
(item.relation.remove wp 'Phrase)))))
words)))
utt))
(define (insert_pause utt word)
"(insert_pause UTT WORDITEM)
Insert a silence segment after the last segment in WORDITEM in UTT."
(let ((lastseg (find_last_seg word))
(silence (car (car (cdr (car (PhoneSet.description '(silences))))))))
(if lastseg
(item.relation.insert
lastseg 'Segment (list silence) 'after))))
(define (insert_initial_pause utt)
"(insert_initial_pause UTT)
Always have an initial silence if the utterance is non-empty.
Insert a silence segment after the last segment in WORDITEM in UTT."
(let ((firstseg (car (utt.relation.items utt 'Segment)))
(silence (car (car (cdr (car (PhoneSet.description '(silences))))))))
(if firstseg
(item.relation.insert
firstseg 'Segment (list silence) 'before))))
(define (find_last_seg word)
;;; Find the segment that is immediately at this end of this word
;;; If this word is punctuation it might not have any segments
;;; so we have to check back until we find a word with a segment in it
(cond
((null word)
nil) ;; there are no segs (don't think this can happen)
(t
(let ((lsyl (item.relation.daughtern word 'SylStructure)))
(if lsyl
(item.relation.daughtern lsyl 'SylStructure)
(find_last_seg (item.relation.prev word 'Word)))))))
(define (Unisyn_Pauses utt)
"(Unisyn_Pauses UTT)
Predict pause insertion in a Unisyn utterance structure."
(let ((words (utt.relation.items utt 'Word)) lastword tpname)
(if words
(begin
(us_insert_initial_pause utt) ;; always have a start pause
(set! lastword (car (last words)))
(mapcar
(lambda (w)
(let ((pbreak (item.feat w "pbreak"))
(emph (item.feat w "R:Token.parent.EMPH")))
(cond
((or (string-equal "B" pbreak)
(string-equal "BB" pbreak))
(us_insert_pause utt w))
; ((string-equal emph "1")
; (us_insert_pause utt w))
((equal? w lastword)
(us_insert_pause utt w)))))
words)
;; The embarassing bit. Remove any words labelled as punc or fpunc
(mapcar
(lambda (w)
(let ((pos (item.feat w "pos")))
(if (or (string-equal "punc" pos)
(string-equal "fpunc" pos))
(let ((pbreak (item.feat w "pbreak"))
(wp (item.relation w 'Phrase)))
(if (and (string-matches pbreak "BB?")
(item.relation.prev w 'Word))
(item.set_feat
(item.relation.prev w 'Word) "pbreak" pbreak))
(item.relation.remove w 'Word)
;; can't refer to w as we've just deleted it
(item.relation.remove wp 'Phrase)))))
words)))
utt))
(define (us_insert_pause utt word)
"(us)insert_pause UTT WORDITEM)
Insert a silence segment after the last segment in WORDITEM in UTT."
(let ((lastseg (us_find_last_seg word))
(silence "pau"))
(if lastseg
(item.relation.insert
lastseg 'Segment (list silence) 'after))))
(define (us_insert_initial_pause utt)
"(us_insert_initial_pause UTT)
Always have an initial silence if the utterance is non-empty.
Insert a silence segment after the last segment in WORDITEM in UTT."
(let ((firstseg (utt.relation.first utt 'Segment))
(silence "pau"))
(if firstseg
(item.relation.insert
firstseg 'Segment (list silence) 'before))))
(define (us_find_last_seg word)
;;; Find the segment that is immediately at this end of this word
;;; If this word is punctuation it might not have any segments
;;; so we have to check back until we find a word with a segment in it
(cond
((null word)
nil) ;; there are no segs (don't think this can happen)
(t
(if (item.daughtern_to (item.relation word 'WordStructure) 'Syllable)
(item.daughtern_to
(item.relation
(item.daughtern_to (item.relation word 'WordStructure) 'Syllable)
'SylStructure)
'Segment)
(us_find_last_seg (item.relation.prev word 'Word))))))
(provide 'pauses)