MELP vocoder 1200 bps

Common description

Low bit rate MELP (Mixed Excitation Linear Prediction) speech coder with rate 1200 bps use classical parametric model of description of speech signals. This model is implemented on the base of linear prediction filter with mixed excitation in several frequency bands.

Independent estimation of voiced/unvoiced decision in different frequency bands is providing more natural synthetic speech sounding then quality of classical LPC vocoders with binary voiced/unvoiced decision for single band.

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Implementation

MELP 1200 bps vocoder is implemented as fixed point ANSI-C model for PC. Real-time implementation on the base of DSP TMS320C54x/C55x will be done in near future. Please ask for its parameters.

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Speech samples

Here you can test speech quality of MELP 1200 bps algorithm by listening following speech samples:

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