DTS v. Lexicon question

Posted by SMR [WizOp] on September 30, 1998 at 23:33:58:

In Reply to: DTS v. Lexicon question posted by Dave Morrison on September 30, 1998 at 22:34:03:

Dave,

Welcome to the forum!

Unfortunately, the "fizztt" of digital noise is unavoidable with DTS music discs or laserdiscs, the problem lies in the DTS syntax. Elegantly designed bitstreams (not DTS which is an inelegant bandwidth hog) contain data flags, which notify a decoder or DAC of the format present. Dolby Digital does this, so does PCM so when they hit a decoder or DAC they are identified (or identified as something unidentified), decoded or ignored.

DTS from music disc or LD contains no data flags however, therefore the decoder hasn't a clue what it is when it first arrives. The only way to ascertain that it is indeed DTS is to accept some of it, read it, and then engage the decode engine. This is the "fizztt" that you hear.

There is an alternative, and that is to mute the digital inputs whenever you interrupt 44.1kHz PCM, thus introducing a longer delay whilst the system mutes, decodes and un-mutes than Lexicon felt acceptable.

DTS from DVD may address this, the bitstream syntax has to contain data flags. Of course, older decoders won't recognise these at all, and upgrades, some of them firmware will have to be made.

Stuart (big DTS fan).

Follow Ups:

• DTS v. Lexicon question Heinz Seltmann 08:22:34 10/01/98 (2)
  • DTS v. Lexicon question SMR [WizOp] 14:13:52 10/01/98 (1)
    • DTS v. Lexicon question Heinz Seltmann 15:48:42 10/01/98 (0)
• DTS v. Lexicon question Dylan 00:45:57 10/01/98 (1)
  • DTS v. Lexicon question SMR [WizOp] 14:07:21 10/01/98 (0)

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