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Sample based codecs Speech bandwidth depends on sampling rate. Sample based, and can usually handle any number of samples per packet. Usually no adaptivity other than packetization. Some can vary quantization, like G.726. Bit-rate depends on sampling rate and sample quantization. Example: G.711 uses 8 bits per sample, and 8kHz sampling. Resulting in 64 kbps audio data rate. Comfort noise may be supported using RFC 3389. |