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

Hi all,   I am trying to port ABR WB+ (fixed point baseline) to a particular platform. I want to calculate its MIPS consumption on...

Hi all,   I am trying to port ABR WB+ (fixed point baseline) to a particular platform. I want to calculate its MIPS consumption on this platform. I know, if   'X' =  Million instructions per frame on this platform 'T' =  Frame duration in seconds   then,  MIPS = X/T

Dear List: I was wondering if it is possible to predict the "overall level of the masking threshold" based on some statistics of the input...

Dear List: I was wondering if it is possible to predict the "overall level of the masking threshold" based on some statistics of the input signal (e.g. power, power spectral density, etc). By "overall level of the masking threshold", I mean the average of the masking threshold over frequency. For example, the threshold in quiet has an overall level of ~ 32 dB It wo

  Hello !! I am working on float to fixed point conversion of a Speech Codec. The input to the speech codec (floating one)...

  Hello !! I am working on float to fixed point conversion of a Speech Codec. The input to the speech codec (floating one) is 16 bit PCM. Fixed point representation has its own limitations of hadling the dynamic range (which is not there in floating point

Hi All, Does anyone has any information ( performance, implementation, productsetc.) about ITU G.726 PLC ? Specially handling of the...

Hi All, Does anyone has any information ( performance, implementation, productsetc.) about ITU G.726 PLC ? Specially handling of the encoder- decoder state tracking during the packet loss? Any help ---most welcomed. Sanjeevk

Shashi, I went thru your posting in response to Venkat's query. What i could make out from your suggestion is this (this is in...

Shashi, I went thru your posting in response to Venkat's query. What i could make out from your suggestion is this (this is in reference to 7.95 Kbps mode; here 4 tracks r used - one non zero pulse from each track; 1st 3 tracks contain 8 positios & the last track contains 16 positions): In the innermost loop : we calculate

Apologies for multiple postings ---------------------------- 9th International Conference on Digital Audio Effets, DAFx06 ...

Apologies for multiple postings ---------------------------- 9th International Conference on Digital Audio Effets, DAFx06 September 18-20, 2006 Montreal, Canada http://www.dafx.ca CALL FOR PAPERS ---------------------------- The 9th International Conference on Digital Aud

Hi all, In vocoders, why linear prediction filter is always designed as 10th order? From where does the magic number 10 came from? ...

Hi all, In vocoders, why linear prediction filter is always designed as 10th order? From where does the magic number 10 came from? This question is cross posted from dsperado@dspe... http://groups.google.com/group/dsperado/browse_frm/thre

Hi, Is anybody Know about the Internal sampling frequency of the signal what 3gpp guys are using for complexity comparision of AMRWB+? ...

Hi, Is anybody Know about the Internal sampling frequency of the signal what 3gpp guys are using for complexity comparision of AMRWB+? Regards, Rama

Hello, I'm trying to run the test vectors for the G.726 (reset and homing) over the original code. They are in hexa format, so I have first...

Hello, I'm trying to run the test vectors for the G.726 (reset and homing) over the original code. They are in hexa format, so I have first converted them to binary using the cvt_h_b.c. Then I feed g726demo with nrm.a(the binary version) and the corresponding parameters (A-law, load, 256 samples, first block =1, number of blocks = 64 and reset = 1, as depicted inthe makefile.cl)