Hmm, the delay caused by the filters in the speex UWB mode seems to be 509 samples. I used the GoldWave editor to determine the offset. I have always been confused by the SNR output in the testenc source code. It did not make sense because it uses a 640 (=FRAME_SIZE) offset for its SNR calculations. After changing the calculation method, the SNR readings are much better. I may decide to adjust my ACM codec to compensate for this delay. I'll probably scrap the initial x samples in the decoding process where x would be 509 for the UWB mode (x is yet to be determined for all the other modes). In the integer Speex version, I changed all public API function names in libspeex to begin with "sphinx_" instead of "speex_". I also prepended every table, typedef or function name with an underscore. That allows me to link against libspeex and libsphinx at the same time without conflict and compare the SNR values of both implementations. Regarding the ACM, I received a bug report indicating that the beta ACM codec crashes when used in VirtualDub. I will also look into this. And I got some EMail correspondence regarding someone trying to use the ACM codec with Microsoft Netmeeting. It appears they will be checking this out for us. Christian --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Sorry about the weird linefeeds. This MS Outlook is killing me. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Alejandro G. Belluscio
2004-Aug-06 15:01 UTC
[speex-dev] delay issues in speex, integer API
Hello Christian, Sunday, June 22, 2003, 8:47:36 PM, you wrote: <p>Christian> Sorry about the weird linefeeds. This MS Outlook is killing me. Just goto Tools/Option/Send/Mail Senmding/Plain Text Options/ and change the line width to 76 chars per line. <p>Best regards, Alejandro Belluscio --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.