Adaptive combining of multi-mode coding for voiced speech and noise-like signals
AssigneeTelefonaktieboiaget LM Ericsson (publ)
InventorsErik Ekudden, Roar Hagen
Life of this patent
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Abstract
In producing from an original speech signal a plurality of parameters from which an approximation of the original speech signal can be reconstructed, a coded signal of the original speech signal is generated. At least one of the parameters is determined using first and second differences between the original speech signal and the coded signal. The first difference is a difference between a waveform associated with the original speech signal and a waveform associated with the coded signal, and the second difference is a difference between an energy parameter derived from the original speech signal and a corresponding energy parameter associated with the coded signal.
Claims26
A method of producing from an original speech signal a plurality of parameters from which an approximation of the original speech signal can be reconstructed, comprising:
- generating in response to the original speech signal a coded signal of the original speech signal;
- determining a first difference between a waveform associated with the original speech signal and a waveform associated with the coded signal;
- determining a second difference between an energy parameter derived from the original speech signal and a corresponding energy parameter associated with the coded signal;
- and
- using the first and second differences to determine at least one of the parameters from which the approximation of the original speech signal can be reconstructed.
A speech encoding apparatus, comprising:
- an input for receiving an original speech signal;
- an output for providing information indicative of parameters from which an approximation of the original speech signal can be reconstructed;
- and
- a controller coupled between said input and said output for providing in response to the original speech signal a coded signal representing the original speech signal, said controller determining at least one of said parameters based on first and second differences between the original speech signal and the coded signal, wherein said first difference is a difference between a waveform associated with the original speech signal and a waveform associated with the coded signal, and wherein the second difference is a difference between an energy parameter derived from the original speech signal and a corresponding energy parameter associated with the coded signal.
A transceiver apparatus for use in a communication system, comprising:
- an input for receiving a user input stimulus;
- an output for providing an output signal to a communication channel for transmission to a receiver via the communication channel;
- and
- a speech encoding apparatus having an input coupled to said transceiver input and having an output coupled to said transceiver output, said input of said speech encoding apparatus for receiving an original speech signal from said transceiver input, said output of said speech encoding apparatus for providing to said transceiver output information indicative of parameters from which an approximation of the original speech signal can be reconstructed at the receiver, said speech encoding apparatus including a controller coupled between said input and said output thereof for providing in response to the original speech signal a coded signal of the original speech signal, said controller further for determining at least one of said parameters based on first and second differences between the original speech signal and the coded signal, wherein said first difference is a difference between a waveform associated with the original speech signal and a waveform associated with the coded signal, and wherein the second difference is a difference between an energy parameter derived from the original speech signal and a corresponding energy parameter associated with the coded signal.
Dependencies are inferred from the claim text.