speech compression

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speech compression Any technique to compress speech in order to use less bandwidth when transmitting. Various standardized techniques are used in Europe and the US, most of which employ lossy compression.

GSM 06.10 is used by European wireless telephones. It uses residual pulse excitation/long-term prediction (RPE/LTP) coding and compresses 160 frames of 13-bit samples into 260 bits. A sample rate of 8 kHz is used. CELP 3.2a is the US Department of Defense's code excited linear prediction voice coder; it is based on Federal Standard 1016, which operates at 4800 bps.

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speech compression

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speech compression