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- From: graeme@labtam.labtam.oz.au (Graeme Gill)
- Subject: Re: DAT, DCC and MD
- Organization: Labtam Australia Pty. Ltd., Melbourne, Australia
- Date: Wed, 27 Jan 1993 03:01:52 GMT
- Message-ID: <1993Jan27.030152.6069@labtam.labtam.oz.au>
- References: <1993Jan20.165333.1241@cmkrnl.com> <106062@netnews.upenn.edu> <1993Jan25.183723.3085@e2big.mko.dec.com>
- Lines: 25
-
- In article <C1EuKp.3wq@fulcrum.co.uk>, igb@fulcrum.co.uk (Ian G Batten) writes:
- |>Au contraire, VCR technology is expensive. Cheap, nasty cassette
- |>players cost ten pounds. DCC's only expense over a grungy cassette
- |>mechanism is the head, which isn't a moving part but is more complex
- |>than a standard analogue head. But in the digital domain problems like
- |>wow and flutter can be addressed by buffering, and high mechanical
- |>accuracy is what costs money.
-
- I came across an article recently from Sony in which they describe
- a play only DAT mechanism that uses a non-tracking technique combined with
- memory buffering. By "non-tracking" they mean that the play head doesn't
- track the helical tracks but may read them at a slight angle, and may read
- the same track several times. As a result they don't need a fancy rotating
- head motor, and mechanical tolerances need not be as fine. They
- claim this design leads to a low cost, low power consumption mechanism
- that is very rugged. It is intended for car DAT players and walkermans.
- Experience with my own DAT recorder indicates that it is less
- sensitive to mechanical movement and shock than normal cassette or
- CD players.
-
- Graeme Gill
- Design Engineer
- Labtam Australia
-
-
-