Codec comparison

Reference error codes and their meanings.

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최근 업데이트: 2달 전

You can set the codec of your Vivox voice client during initialization using

vx_sdk_config

and

default_codecs_mask

. The following table compares the four codecs that the Vivox SDK uses.

	Opus	Siren 14	Siren 7	PCMU
Network Bitrate*	40 kbit/s	32 kbit/s	32 kbit/s	64 kbit/s
CPU Usage (Encoding)	Moderate	Low	Lower	Lowest**
CPU Usage (Decoding)	Low	Low	Lower	Lowest
Supports configurable bitrate?	Yes (6 to 128 kbit/s)	No	No	No
Audio Sample Rate†	48 kHz	32 kHz	16 kHz	8 kHz
Audio Quality	Best (20+ kbit/s)	Good	Fair	Poor

* Numbers listed represent the default bitrate for each codec for one voice stream at theoretical max. Codec bitrates are only in effect while speech is active (either being transmitted or received). These exclude 14.4 kbit/s of overhead from Vivox packet headers while speech is active. ** PCMU is essentially free in terms of CPU usage. Encoding and decoding are composed of bitwise operations and table lookups. † Higher sample rates allow for higher fidelity audio but do not by themselves guarantee a better sound.

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Codec comparison