Patent ID: 6182030
Filing Date: 2001-01-30
Classification: G10L

Abstract:
A transmitter for encoding an input signal to produce encoded information for transmission over a transmission medium, comprising:a primary coder having an input to receive the input signal, having a first output for providing a target signal in response to the input signal, having a second output for providing in response to the input signal a primary coded signal that is intended to match the target signal, and having a third output responsive to said input signal for providing encoded information from which said primary coded signal is to be reconstructed;an enhancement estimator having an input for receiving said primary coded signal and said target signal from said primary coder, said enhancement estimator having an output responsive to said primary coded signal and said target signal for providing enhancement information indicative of how well said primary coded signal matches said target signal;an encoder having an input for receiving said enhancement information from said enhancement estimator, and having an output for providing an encoded representation of said enhancement information; andan output for outputting said encoded information from which said primary coded signal is to be reconstructed from said primary coder to the transmission medium, and for outputting said encoded representation of said enhancement information from said encoder to the transmission medium.