Method and apparatus for transmitting an encoded speech signal
AssigneeInterDigital Technology Corporation
InventorDaniel Lin
Life of this patent
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Abstract
A method and apparatus for processing speech in a wireless communication system uses CELP speech encoded signals. A speech input receives samples of a speech signal and a codebook analysis block for selects an index of a code from at least one of a plurality of codebooks. A weighted synthesis filter is used in the generation of a prediction error between a predicted current sample and a current sample of the speech samples. The index is transmitted to the receiver to enable reconstruction of the speech signal at the receiver.
Claims14
A method of transmitting an encoded speech signal, the method comprising:
- receiving speech samples;
- determining a line spectral pair (LSP) index based on the speech samples;
- determining a code index and an associated gain based on the speech samples, wherein the code index is selected from at least one of a plurality of codebooks;
- determining a pitch lag and a pitch gain based on the speech samples;
- and
- transmitting an encoded speech signal including the code index, the associated gain, the pitch lag, the pitch gain and the LSP index.
An apparatus comprising:
- a sampler configured to generate speech samples;
- an encoder configured to encode a speech signal using a line spectral pair (LSP) index, a code index from at least one of a plurality of codebooks, a gain associated with the code index, a pitch lag, and a pitch gain based on the speech samples;
- and
- a transmitter configured to transmit an encoded speech signal including the code index, the gain associated with the code index, the pitch lag, the pitch gain, and the LSP index.
An apparatus comprising:
- a sampler configured to generate speech samples;
- an encoder configured to determine a line spectral pair (LSP) index, a code index, a gain associated with the code index, a pitch lag, and a pitch gain based on the speech samples;
- a multiplexer configured to multiplex the code index, the gain associated with the code index, the pitch lag, the pitch gain, and the LSP index to generate multiplexed information;
- and
- a transmitter configured to transmit an encoded speech signal including the multiplexed information.
A method of transmitting an encoded speech signal, the method comprising:
- receiving speech samples;
- determining a code index and an associated gain from a plurality of codebooks based on the speech samples, wherein the code index is determined by searching the plurality of codebooks for a codevector that maximizes a fidelity criterion function;
- and
- transmitting an encoded speech signal including the code index and the associated gain.
A method of transmitting an encoded speech signal, the method comprising:
- receiving speech samples;
- determining a line spectral pair (LSP) index based on the speech samples;
- determining a code index and an associated gain based on the speech samples;
- determining a pitch lag and a pitch gain based on the speech samples;
- generating multiplexed information by multiplexing the code index, the associated gain, the pitch lag, the pitch gain and the LSP index;
- and
- transmitting an encoded speech signal including the multiplexed information.
An apparatus comprising:
- a sampler configured to generate speech samples;
- an encoder configured to encode a speech signal using, based on the speech samples, a code index and a gain associated with the code index from a plurality of codebooks, wherein the code index is determined by searching the plurality of codebooks for a codevector that maximizes a fidelity criterion function;
- and
- a transmitter configured to transmit an encoded speech signal including the code index and the gain associated with the code index.
Dependencies are inferred from the claim text.