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roccap
Beginner
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G729 compression size

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I have been playing with the usc_speech_codec sample to compress a wav file that is
800K in size, and I would assume that compressing it with G729 should give me a
size reduction factor of 16:1 (160bytes -> 10 bytes), hence I would expect an output
file of 50K in size, but I'm actually getting a file of 81K in size.
Am I missing something obvious?
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1 Solution
Igor_B_Intel1
Employee
90 Views
Hi,
USC output file designed to allow USC decoder to automatically detect used speech codec and corresponding bitrate. To realize itframe header in the length of 6 bytes stored before every compressed frame.Adding of theframe header occuresonly on application level and all USC codecs returns clear bitstream.

Igor S. Belyakov

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Igor_B_Intel1
Employee
91 Views
Hi,
USC output file designed to allow USC decoder to automatically detect used speech codec and corresponding bitrate. To realize itframe header in the length of 6 bytes stored before every compressed frame.Adding of theframe header occuresonly on application level and all USC codecs returns clear bitstream.

Igor S. Belyakov

View solution in original post

Reply