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Discussion Groups | Speech Coding | FS-1016 CELP
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
FS-1016 CELP - Ray Mc Carthy - Aug 11 16:07:00 2003
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Hi All, I am working with the FS-1016 4.8kb/s CELP coder but I cant understand why the LSP's are interpolated for every subframe.Can someone tell me is there a specific advantage for doing this? Regards, Ray. -------------------Legal Disclaimer--------------------------------------- The above electronic mail transmission is confidential and intended only for the person to whom it is addressed. Its contents may be protected by legal and/or professional privilege. Should it be received by you in error please contact the sender at the above quoted email address. Any unauthorised form of reproduction of this message is strictly prohibited. The Institute does not guarantee the security of any information electronically transmitted and is not liable if the information contained in this communication is not a proper and complete record of the message as transmitted by the sender nor for any delay in its receipt. --------------------------------------------------------------------------------\ -------- |
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Re: FS-1016 CELP - Author Unknown - Aug 11 17:00:00 2003
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Fo smoothing purpose since your LSP is computed every frame instead of every subframe for saving quantization bits purpose, in order to get LPC coef. for each subframe, you do linear interpolation for simplicity. -Chunyan > > > Hi All, > I am working with the FS-1016 4.8kb/s CELP coder but I cant understand > why the LSP's are interpolated for every subframe.Can someone tell me is > there a specific advantage for doing this? Regards, > Ray. > -------------------Legal > Disclaimer--------------------------------------- > > The above electronic mail transmission is confidential and intended only > for the person to whom it is addressed. Its contents may be protected by > legal and/or professional privilege. Should it be received by you in > error please contact the sender at the above quoted email address. Any > unauthorised form of reproduction of this message is strictly > prohibited. The Institute does not guarantee the security of any > information electronically transmitted and is not liable if the > information contained in this communication is not a proper and complete > record of the message as transmitted by the sender nor for any delay in > its receipt. --------------------------------------------------------------------------------\ -------- > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > _____________________________________ > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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RE: Ceptral Analysis - Shree Jaisimha - Aug 12 2:40:00 2003
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Hi All I will be releasing the ceptral based speech enhancement technique code to the speech group once its fine tuned. If there are any queries relating to this do let me know. Wrapping up my thesis at present and will release the code as soon as my thesis presentation is over. Tracy Liu, I remeber you asked about this, sorry kind of lost your email address down the way. I will post it on the speech group soon. thanks and regards In God We Trust ===== Shree Jaisimha |
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RE: FS-1016 CELP - Sameer Kibey - Aug 13 4:43:00 2003
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hello Ray i am not familiar with FS-1016 CELP coder, but let me answer this in context of G.723.1.. here each frame consists of 4 subframes. the LPC to LSP converson is done only for the last subframe. For the remaining subframes, the LSPs are obtained using interpolation between LSPs of current and previous frame. The standard ofcourse doesnt tell why it does this.. but one reason for the use of interpolation could be the fact that LSPs of adjecent frames exhibit strong correlation and do not change much from one frame to the next. So instead of doing the LSP search (LPC to LSP conversion) for all subframes, just do it once in each frame. Use interpolation to obtain LSPs for the other subframes and thus 'save some computations'. Smoothing could be another objective of LSP interpolation, as Chunyan suggests, but i can't comment much on this. btw, does the FS-1016 coder follow similar sequence of operations as G.723.1? regards Sameer -----Original Message----- From: [mailto:] Sent: Monday, August 11, 2003 10:31 PM To: Cc: Subject: Re: [speechcoding] FS-1016 CELP Fo smoothing purpose since your LSP is computed every frame instead of every subframe for saving quantization bits purpose, in order to get LPC coef. for each subframe, you do linear interpolation for simplicity. -Chunyan > > > Hi All, > I am working with the FS-1016 4.8kb/s CELP coder but I cant understand > why the LSP's are interpolated for every subframe.Can someone tell me is > there a specific advantage for doing this? Regards, > Ray. |
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Re: Speech Enhancement - shreejaisimha - Jan 23 17:32:00 2004
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Dear All, Please check out the above link for an online paper on speech enhancement of narrowband speech. This is the work on my thesis here and I hope it serves its purpose of benefiting others in this area. http://www.embeddedstar.com/articles/2004/1/article20040119-2.html cheers In God We Trust. Om Sakti Saranam, Om Nama Shiva Ya cheers |
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