DV audio
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From: Alastair M. <ala...@aj...> - 2000-04-26 17:32:48
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Help? I spent the last couple of days trying to figure out why my sound decoding routines for capture DV video weren't working properly. My bad, I was using the SMPTE 314 standard, which only expects audio at 48kHz, 16bit. Turns out the samples I was using are 12-bit, 32kHz, which is a legal IEC 61834 coding. (I'm still having a bit of trouble with my camcorder now set to 16-bit, but that's a different issue.) But I only have a copy of SMPTE-314 -- $34 I didn't mind paying, but not another $236 for a copy of IEC 61834-2, which has the description of other possible encoding. If anyone has a copy of this, could they summarize the relevant details sufficient for me to add decoding for 32kHz/12-bit and 44.1kHz/16-bit which it allows? Otherwise I guess I'll just tweak my code to reject anything it doesn't recognize (ie non-SMPTE 314) and let someone else take it from there. (If anyone wants to look at what's there so far, there's a copy at http://www.ajwm.net/backfire/dv_audio/ - it doesn't have changes I made last night and it needs work, but there it is.) -- Alastair |