Mailinglist Archive: radeonhd (408 mails)

[Matthias Hopf <mhopf@xxxxxxx>]

On May 27, 09 18:44:41 -0400, Alex Deucher wrote:
> On Tue, May 26, 2009 at 4:29 PM, Christian König
> > So my questions: Is the RV630 capable of doing high definition audio at
> > all? The specs from ATI are not 100% clear about that.
> >
> > Have anybody of your guys ever got stuff like this working? Maybe with
> > the windows driver?
>
> I don't think there is enough bandwidth for > 2 channel PCM.  IIRC,
> the HDMI spec only allows 2 channel PCM.

Actually, it allows much more: from wikipedia:

  HDMI supports up to 8 channels of audio at sample sizes of 16-bit,
  20-bit, and 24-bit with sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2
  kHz, 96 kHz, 176.4 kHz, and 192 kHz. HDMI also supports any
  IEC61937-compliant compressed audio stream such as Dolby Digital and
  DTS and up to 8 channels of one-bit DSD audio, which is used on Super
  Audio CDs, at rates up to 4 times that of Super Audio CD. With version
  1.3, HDMI supports lossless compressed audio streams Dolby TrueHD and
  DTS-HD Master Audio.

So even HDMI 1.2 supported more than 2 channels PCM.

I have no idea whatsoever whether the RV630 is capable of providing that
bitstream capacity.

CU

Matthias

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