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ACELP | ADPCM | AMBE | AMR | AMR-NB | CELP | Codebook | DTMF | G.723 | G.726 | G.729 | GSM | Interpolation | LPC | LSF | LSP | MELP | PCM | Perceptual | Pitch | PSOL | QCELP | Quantization | SMV | VAD | Vocoder
Discussion Groups
Discussion Groups | Speech Coding | MBE
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
MBE - Author Unknown - Jun 20 17:15:00 2002
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Hello, I am looking for information about phase distribution in my vocoder (Matlab model of some kind of MBE vocoder, but some parameters are detected by Analyse-by-Synthese ). I have pitch frequency, amplitudes of each harmonics (spectral envelope), and phases. So I can synthese speech. But I shoudnt send phase to receiver. How to find phase of each harmonic, based only on pitch and harmonic amplitudes? And second question: How to quantize LSF coefficients.? In Matlab is interesting function poly2lsf, which convert LPC to LSF. It is posible to quantize LSF in 2-3 byte each. How to do it? Thanks in advance. |
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MBE - Nalin Pithwa - Feb 8 1:17:00 2003
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Hi, Does anyone have any literature related to the Multiband Excitation Algorithm ? I would also be interested in some free source code (C) or MATLAB code. Thanks in advance, Nalin |
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