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G.726
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==History== G.721 was introduced in 1984, while [[G.723]] was introduced in 1988. They were folded into G.726 in 1990. '''G.727''' was introduced at the same time as G.726, and includes the same bit rates, but is optimized for [[PCME|packet circuit multiplex equipment]] (PCME) environment. This is achieved by embedding 2-bit [[Quantization (signal processing)|quantizer]] to 3-bit quantizer and same for the higher modes. This allows dropping of the [[least significant bit]] from the bit stream without adverse effects on speech signal.
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