[vdr] Re: dvd-plugin: UseDolbyDigital

Olaf Titz olaf at bigred.inka.de
Sat Mar 19 12:19:42 CET 2005


In article <20050313161307.GB21955 at wotan.suse.de> you write:
> > DVD's in the PAL/SECAM area can include MP2 (MPEG-1 layer II) tracks, as
> > well:
> > http://www.discusa.com/technology/dvdvideo/dvdvid_audenc.htm
>
> I've a few of DVD's of this area code. No one of them uses
> MP2, many of DTS and some Video DVD with Music PCM and
> DTS 24/96.  AFAIK DVD have to had an AC3 track accordingly
> to the specs.  The rest is optional.

According to http://www.dvddemystified.com/dvdfaq.html#3.6, the specs
are as follows:

"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 anything which is produced for more than one market will likely
have AC3 as the smallest common denominator. (But recordings from DVB
broadcast in PAL format which contain only MP2 audio make "valid" DVDs
too. What do US broadcasters use?)

Olaf




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