[vdr] Recommendation for new hd vdr system.

Seppo Ingalsuo seppo.ingalsuo at iki.fi
Mon Nov 16 20:46:49 CET 2009


On Sun, 2009-11-15 at 20:24 +0200, Theunis Potgieter wrote:
> 2009/11/15 Timothy D. Lenz <tlenz at vorgon.com>:
> > The SPDIF can't carry 7.1 sound? It's just digital data stream. Should
> > be able to carry how ever many channels get encoded to the data packets.
> >
> Is the problem not bandwidth requirements?

For consumer SPDIF max bandwidth is about 2 x 20 x 48 kHz = 1.92
Mbit/s. 

E.g. encoded DD+ 7.1 bit stream fits there but linear 7.1 PCM doesn't.
Highest end audio formats are at different order of magnitude. Dolby
TrueHD can be up to 18 Mbit/s and DTS-HD Master Audio up to 24.5 Mbit/s
those are passed only over HDMI in CE devices.

http://en.wikipedia.org/wiki/Dolby_Digital#Dolby_Digital_Plus

http://en.wikipedia.org/wiki/DTS_%28sound_system%29#DTS-HD_Master_Audio

BR,
Seppo





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