Changes between Version 7 and Version 8 of Ticket #1888


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Timestamp:
Oct 7, 2015 3:44:20 PM (9 years ago)
Author:
ismangil
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  • Ticket #1888 – Description

    v7 v8  
    6161 
    6262= How to use WebRTC AEC = 
    63 To use WebRTC AEC, specify the value {{{PJMEDIA_ECHO_WEBRTC}}} in {{{pjsua_media_config.ec_options}}} ({{{MediaConfig.ecOptions}}} for PJSUA2), and specify the delay estimate for sound card and system buffers in {{{pjsua_media_config.ec_tail_len}}} ({{{MediaConfig.ecTailLen}}} for PJSUA2). !WebRTC AEC's performance is very dependent on this delay calculation. A poor estimate, even by as little as 40ms, may affect the echo cancellation results greatly. Our WebRTC wrapper has enabled the delay agnostic feature, which will adjust the delay accordingly, however it may take some time (5-10s or more) for the Aec module to learn the optimal delay, thus a good initial estimate is necessary for good EC quality in the beginning of a call. 
     63To use WebRTC AEC, specify the value {{{PJMEDIA_ECHO_WEBRTC}}} in {{{pjsua_media_config.ec_options}}} ({{{MediaConfig.ecOptions}}} for PJSUA2), and specify the delay estimate for sound card and system buffers in {{{pjsua_media_config.ec_tail_len}}} ({{{MediaConfig.ecTailLen}}} for PJSUA2). WebRTC AEC's performance is very dependent on this delay calculation. A poor estimate, even by as little as 40ms, may affect the echo cancellation results greatly. Our WebRTC wrapper has enabled the delay agnostic feature, which will adjust the delay accordingly, however it may take some time (5-10s or more) for the AEC module to learn the optimal delay, thus a good initial estimate is necessary for good EC quality in the beginning of a call. 
    6464 
    6565The delay should be '''at least''' as much as frame time (by default, ptime is 20ms) + {{{PJMEDIA_WSOLA_DELAY_MSEC}}} (the default is 5ms).