On Thu, 18 Mar 2004, Richard Ellis wrote:
> The DVD specs, or at least that part of which is available freely
> online from various web pages, indicates that for NTSC, only LPCM and
> AC3 are mandated. For PAL, it's LPCM and MP2 that are mandatory.
From one of those web pages (http:://www.dvddemystified.com):
Discs containing 525/60 (NTSC) video must use PCM or Dolby Digital on at least
one track. Discs containing 625/50 (PAL/SECAM) video must use PCM or MPEG
audio or Dolby Digital on at least one track. Additional tracks may be in
any format.
So PAL players have all 3 audio formats, but NTSC is only required
to do PCM or MPEG audio.
But as was mentioned the 'commodity like' nature of DVD chipsets means
that a vendor has to go out of their way to make a NTSC player that
can't play MPEG audio.
Cheers,
Steven Schultz
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