search for: echost

...generated, except /cdrom is changed to /mnt/cdrom to work. I'm running Redhat 7.0. If you need more information just ask. Thanks for the help, James R ------------------------------------------------------------ Many Bothans died to bring you this email...from http://www.echostation.com

...txdisable: 0, rxdisable: 0, iomask: 0 dahdi: curzone: 00000000, tonezone: 0, curtone: 00000000, tonep: 0 dahdi: digitmode: 0, txdialbuf: , dialing: 0, aftdialtimer: 0, cadpos. 0 dahdi: confna: 0, confn: 0, confmode: 0, confmute: 0 dahdi: ec: 00000000, echocancel: 0, deflaw: 0, xlaw: f8b6f2a0 dahdi: echostate: 00, echotimer: 0, echolastupdate: 0 dahdi: itimer: 0, otimer: 0, ringdebtimer: 0 No idea what any of that means or how it's relevant. dmesg is full of interrupt misses and polarity reversals: ... wctdm24xxp0: Missed interrupt. Increasing latency to 18 ms in order to compensate. wctdm24xxp...

...test echo cancel function of speex(1.1.6),find > some question! > 1. when echo cancel is effect , the time has elapsed > about 20 second , it is too long for using,must > shorten! The filter is adaptive, it needs to learn... If you do not throw away your echostate, then next time it just might pick up where it left of. Most loudspeaker telephones (the expensive ones) have a special learn function to adjust to surroundings. They will start beeping to train the filter... > 2. when PC CPU is busy, sometimes the effect of echo > eancel...

...in is like this: 1. get playback and capture data 2. down sample both to codec rate 3. do echo cancellation 4. do pre processing (using speex. The preprocessor also does residual echo cancelling because i called "speex_preprocess_ctl(m_pSpeexPreprocessState, SPEEX_PREPROCESS_SET_ECHO_STATE, m_EchoState)") 5. encode and send data over network. -- Regards, Niels Werensteijn