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G.711 Speech Coder (G.711 Vocoder)

ITU-T G.711 is a standard to represent 8 bit compressed pulse code modulation (PCM) samples for signals of voice frequencies, sampled at the rate of 8000 samples/second. G.711 encoder will create a 64 Kbps bitstream. This standard has two forms, viz., A-Law and µ-Law. A-Law G.711 PCM encoder converts 13 bit linear PCM samples into 8 bit compressed PCM (logarithmic form) samples, and the decoder does the conversion vice versa. µ-Law G.711 PCM encoder converts 14 bit linear PCM samples into 8 bit compressed PCM samples.

In addition to G.711 (A-Law and µ-Law) companding, the implementation also supports G.711 Appendix 1 and Appendix 2 which defines Packet Loss Concealment and silence suppression.

Currently Encore’s G.711 is available on TI’s TMS320C64x (c64x), TMS320C62x (c62x), TMS320C54x (c54x), TMS320C55x (c55x), Coldfire (MCF52xx, MCF53xx, MCF522xx), PowerPC, ARM platforms.

G.711 Product Brief - Download PDF

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