Forums Search for: CELP
Advantages & Disadvantages of ACELP & QCELP
inHi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me?...
Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me? Thank you very much..
channel coding
Hi everyone, I am trying to implement "combined speech & channel coding" on an ADSP processor. It involves convolutional coding...
Hi everyone, I am trying to implement "combined speech & channel coding" on an ADSP processor. It involves convolutional coding with viterbi decoding. CELP to be used for speech coding. Channel will be modelled as Rayleigh fading channel.I have just stated the wor
simple real time implementation
Hi all, i am now looking for simple realtime implementation of codec (pseudo-celp) . The codec api gives me samples in array buffer ...
Hi all, i am now looking for simple realtime implementation of codec (pseudo-celp) . The codec api gives me samples in array buffer #define BUF_SIZE 240 int buffer[BUF_SIZE]; now i start in this way dc_rmv(buffer,filtersp); and carry on with rest of modules , like lpc,lpc
Adaptive Codebook generation in AMR speech codec
Hi, I am working on a project that implements CELP coding, as in AMR codec for GSM. The codec uses a 'codebook' to store 'code vectors', which...
Hi, I am working on a project that implements CELP coding, as in AMR codec for GSM. The codec uses a 'codebook' to store 'code vectors', which are compared with excitation vectors and the error minimised till a match is found. This match is used to synthesise speech. The spec I am using, 3GPP TS 26.090 ver 6.0.0, r6, specifies codebook architecture but not how it is created. So how is this
Senior Engineer (Speech and Video) needed in Red Bank, NJ
inThe Voice Enhancement Solutions division of NMS Communications is looking for a senior engineer for multimedia gateway project with ...
The Voice Enhancement Solutions division of NMS Communications is looking for a senior engineer for multimedia gateway project with speech signal processing and/or video processing experience to join the multimedia team. Candidate should be skilled in the area of CELP based speech co
How to adjust timing of speech frame
inHi, Anyone here know a method to adjust timing of 22.5ms speech frames to 20ms. I am working with different vocoders including AMBE (Advanced...
Hi, Anyone here know a method to adjust timing of 22.5ms speech frames to 20ms. I am working with different vocoders including AMBE (Advanced Multiband Excitation) versus CELP/VSELP. The generated vocoder frames are originally 22.5ms, but the vocoder DSP chip takes in 20ms. Basically, are there techniques that exist such as time compression, post-filtering/processing, duplicating speech fra...
lpc10 vs celp
inhi all, am new to speech coding and trying to understand the principles. stumbled upon this website: ...
hi all, am new to speech coding and trying to understand the principles. stumbled upon this website: http://svr-www.eng.cam.ac.uk/~ajr/SA95 /node87.html and it lists the areas to be addressed in LPC
enhancement of packet loss-concealment of g729 standrd usin wsola.
Hi I am the final year engineering student, my aim is to enhence the g729 standard. Could anybody give me some relative info or give me the...
Hi I am the final year engineering student, my aim is to enhence the g729 standard. Could anybody give me some relative info or give me the source code in C++ about time-scale modification by WSOLA, GRE on the G 729 strandard relative to the paper : (A Packet Loss Concealment Algorithm Based on Time-Scale Modification for CELP-type Speech Coders ) ? Or introduce some good books i
Algebraic codebook
1) What is algebraic celp is a Code Excited LP There are some kind of code, and we can express code...
1) What is algebraic celp is a Code Excited LP There are some kind of code, and we can express code in some ways