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IPP G729 Specifications

e_ponk
Beginner
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Hi,

Is there documentations telling IPP G729 specifications? I want to know what is frame size, encoded frame size, etc that g729 used.

anyone know about this

Regards

Yeffri

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Vyacheslav_Baranniko
New Contributor II
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Hi Yeffri

In the next IPP release such information will be released within speech coding samples documentation.

BTW, you might read this info out from ITU G729 specs. IPP G729 just follows the specification.

For example,PCM frame sizeand bitstream frameare as follows:

10ms 8000 KHz PCM frame= 80 PCM samples (USC encode functioninput/ USC decode functionoutput).

Bitsream frame size depends on frame type (returned by encode function orfed into decode function).See belowa frame type andbistream size correspondence: in order, frame description, frame type (int),bitstream size (in bytes):Untransmitted (0,0), SID (0,2), Voice 6400 bps(2,8), Voice 8000 bps(3,10), Voice 11800 bps(4,15). Bad frame (-1) can be also fed into decode function resulted in PLC output (packet lost concealment).

Slava

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