Re: [codec] #15: Efficiently combine pre-encoded audio

It might be valuable to be able to obtain the VAD without having to decrypt
the bitstream, since that also can become a problem as the number of streams
grows.

There is a security consideration (traffic analysis), however, it still
might be worth thinking about.

Stephen Botzko

On Wed, May 12, 2010 at 11:44 AM, Jean-Marc Valin <
jean-marc.valin@octasic.com> wrote:

> Benjamin M. Schwartz wrote:
>
>> The cheapest solution, of course, is transmit-side activity detection.
>> Maybe we need to specify a way for a receiver to request that the
>> transmitter employ (or not employ) VAD.
>>
>
> I think you can do better than an encoder VAD. All you need to do is make
> sure that the relevant information you need for a VAD can easily be decoded
> from the bit-stream without having to do a full decoding. For example, if
> you're able to easily extract the gain and spectral envelope, you can do a
> VAD based on that without even having to look at the other parameters in the
> bit-stream.
>
>        Jean-Marc
>
> _______________________________________________
> codec mailing list
> codec@ietf.org
> https://www.ietf.org/mailman/listinfo/codec
>