[Speex-dev] VAD CPU usage

Jozsef Vass
Wed, 16 Apr 2008 02:48:35 -0000

Hi Jean-Marc

I am using speex in my voip app (wideband mode). I
have noticed that when VAD kicks in, CPU considerably
increases (bitrate decreases to 4 kbps). It takes
about 7 ms to encode one frame versus 0.5 ms (for
speech). This happens regardless preprocessor is used.

Although the issue seems to be driver dependent, it
occurs on XP, Vista and Mac OS X.

Besides complexity and quality, this is the only
parameter set for encoder.

We use the latest released version, 1.2beta3.

Are you aware of any possible problem in VAD?

Thanks.

Jozsef




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