[FFmpeg-devel] [PATCH] AC3 decoder CRC check

[Måns Rullgård]

Uoti Urpala <uoti.urpala at pp1.inet.fi> writes:

> On Sun, 2007-09-02 at 18:32 +0100, M?ns Rullg?rd wrote:
>> >> I reckon the decoder will notice if the frame is damaged anyway, and
>> >> see no reason to explicitly check the CRC.
>
>> In that case I say the AC3 decoder needs to be improved to reject
>> these damaged frames.
>
> Do you mean reject them without the CRC check? Is there some redundancy
> in the AC3 bitstream which would allow detecting damage reliably? In
> general I wouldn't expect codecs to notice all damaged frames without
> explicit checksums.

Maybe not all, but I'd expect truncated frames to be detectable.

-- 
M?ns Rullg?rd
mans at mansr.com