Patent ID: 6917914
Filing Date: 2005-07-12
Classification: G10L

Abstract:
1. In a voice communication system operating on a bandwidth constrained channel a method of transmitting and receiving a voice signal comprising the steps of: obtaining a plurality of sub blocks of speech representing the voice signal; generating unquantized MELP parameters for each of the sub blocks of speech; quantizing the plurality of sub blocks of speech as an output block using the unquantized MELP parameters of each of the blocks to create quantized MELP parameters of the output block; encoding the quantized output block into a serial bit stream; transmitting the serial bit stream over the bandwidth constrained channel; receiving the serial bit stream; extracting the quantized MELP parameters of the output block; decoding the quantized MELP parameters to form unquantized MELP parameters associated with output block of speech; creating unquantized MELP parameters for each of the sub blocks from the unquantized MELP parameters associated with the output block of speech; and reconstructing the voice signal sequentially for each sub block from their associated unquantized MELP parameters.