Re: [AVT] AC-3 audio transmission with TFRC

[Colin Perkins <csp at csperkins.org>]

On 30 Oct 2005, at 01:07, Alejandro Cabrera Obed wrote:
> Suppose I transmit audio AC-3 over IP/UDP/RTP with congestion  
> control using TFRC. So I need to use the "RTP Payload Format for  
> Audio AC-3" and the "RTP Profile for TFRC".
>
> Suppose I design an AC-3 audio system that handles a sampling rate  
> of either 48 KHz or 44.1 KHz...........Can I take all the values  
> from the interval between 48 Khz and 44.1 Khz ( let's say 48, 47.9,  
> 47.8, 47.7.....44.2 , 44.1) in order match the audio rate to the  
> calculated rate with TFRC equation ???

No. Only clock rates of 32000, 44100 and 48000 are allowed.

> Or in the negative case, what parameter would you take in order to  
> vary the audio rate to match the TFRC calculated rate for  
> congestion control ???

I'm not sure it's possible with the AC-3 codec.

Colin

_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www1.ietf.org/mailman/listinfo/avt