search for: fangchao

...the aim of most pychoacoustics model was to derive the SMR coefficient which helped to allocate the bits available, but in ogg vorbis,i think it didn't allocate the bits directly to the MDCT coefficient but to the residue , did I make a mistake? Looking forward to your letter. ????????fangchao ????????fangchao_dlut@sina.com ??????????2005-09-23

...you help me out? Also, when doing the T/F transform,we used MDCT, so it means no imaginary part. And i am much puzzled about the angle in the stereo couple,what does it mean? and where does it come from ? Thank you and looking forward to your letter! BEST REGARDS. ????????LISA(^_^) ????????fangchao_dlut@sina.com ??????????2005-09-29

...custic model). Now I am just confused whatever the floor really is .Is it a predition to the MDCT coefficient or just an estimation to the maximum allowable noise? And how the psychoaustic result is applied to the compution of the floor? Looking forward to your letter! ????????Lisa ????????fangchao_dlut@sina.com ??????????2005-09-26

HI I am confused about the psychology acoustics model. How can we decide which window to use? I looked into the procedure,but just confused . can you tell me the basic flow or give me a flowchart? Thank you! ??????? ????????fangchao ????????fangchao_dlut@sina.com ??????????2005-09-13

...channels). 8. if it is not the end of the coming PCM data,do the loop again. For the first time,we use a short window ,after that, we decide the type of window according to the psychoacustic model. Is it all right ? Looking forward for your letter! Best regards ??????? Lisa ????????fangchao_dlut@sina.com ??????????2005-09-27

...nger than the one which was compressed with MP3 at the same bitrate(128kbps),I am now confused aboout the pre-echo preventing scheme. Can you tell me what method does Ogg Vorbis adopt besides the auto windowsize switch? Looking forward to your letter! Thank you! ??????? Lisa (^_^) ????????fangchao_dlut@sina.com ??????????2005-10-29