Code-excited linear prediction: Difference between revisions

Revision as of 23:28, 5 July 2019

Revision as of 18:52, 15 July 2019

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In order to achieve real-time encoding using limited computing resources, the CELP search is broken down into smaller, more manageable, sequential searches using a simple perceptual weighting function. Typically, the encoding is performed in the following order:

* [[Linear Predictionpredictive Coefficientscoding|Linear prediction coefficients]] (LPC) are computed and quantized, usually as [[Lineline spectral pairs|LSPs]] (LSPs).

* The adaptive (pitch) codebook is searched and its contribution removed

* The fixedadaptive (innovationpitch) codebook is searched and its contribution removed.

* The fixed (innovation) codebook is searched.

===Noise weighting===