[FFmpeg-soc] [PATCH]aacsbr: internal sample rate

[Alex Converse]

On Fri, Nov 27, 2009 at 2:50 AM, Robert Swain <robert.swain at gmail.com> wrote:
> On Thu, 2009-11-26 at 22:31 -0500, Alex Converse wrote:
>> Fs_SBR as defined by the specification is the SBR internal sample rate
>> and defined to be twice the core coder nominal sample rate (listed in
>> Table 4.82 - Sampling Frequency Mapping). ExtensionSamplingFrequency
>> is the SBR output sample rate.
>>
>> The code currently uses ExtensionSamplingFrequency instead of Fs_SBR.
>> This patch creates a new context variable to hold Fs_SBR.
>
> Fine by me, but where does the extension sampling frequency come into
> it? Should it?
>

Extension sampling frequency should be used to select which synthesis
QMF bank to use (regular vs downsampled) and as the final output
frequency.