Channel decoding for wireless telephones with multiple microphones and multiple description transmission
First Claim
1. A wireless telephone, comprising:
- a receiver module that receives a plurality of versions of a voice signal, each version of the voice signal comprising a plurality of speech frames;
a channel decoder configured to decode a speech parameter associated with a speech frame from one of the plurality of versions of the voice signal, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a corresponding speech frame from another version of the plurality of versions of the voice signal;
a speech decoder that decodes at least one of the plurality of versions of the voice signal based on the speech parameter to generate an output signal; and
a speaker that receives the output signal and produces a sound pressure wave corresponding thereto.
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Abstract
An embodiment of the present invention provides a wireless telephone including a receiver module, a channel decoder, a speech decoder, and a speaker. The receiver module receives a plurality of versions of a voice signal, wherein each version of the voice signal comprises a plurality of speech frames. The channel decoder is configured to decode a speech parameter associated with a first speech frame from a first version of the voice signal, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a second speech frame from a second version of the voice signal. The speech decoder decodes at least one of the first or second versions of the voice signal based on the speech parameter to generate an output signal. The speaker receives the output signal and produces a sound pressure wave corresponding thereto.
149 Citations
22 Claims
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1. A wireless telephone, comprising:
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a receiver module that receives a plurality of versions of a voice signal, each version of the voice signal comprising a plurality of speech frames;
a channel decoder configured to decode a speech parameter associated with a speech frame from one of the plurality of versions of the voice signal, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a corresponding speech frame from another version of the plurality of versions of the voice signal;
a speech decoder that decodes at least one of the plurality of versions of the voice signal based on the speech parameter to generate an output signal; and
a speaker that receives the output signal and produces a sound pressure wave corresponding thereto. - View Dependent Claims (2, 3, 4, 5)
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6. A multiple-description transmission system, comprising:
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(a) a first wireless telephone comprising (i) a microphone array, each microphone in the array configured to receive voice input from a user and to produce a voice signal corresponding thereto, (ii) an encoder coupled to the microphone array and configured to encode each voice signal, and (iii) a transmitter coupled to the encoder and configured to transmit each encoded voice signal; and
(b) a second wireless telephone comprising (i) a receiver module that receives each transmitted voice signal, each transmitted voice signal comprising a plurality of speech frames;
(ii) a channel decoder configured to decode a speech parameter associated with a speech frame from one of the transmitted voice signals, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a corresponding speech frame from another transmitted voice signal;
(iii) a speech decoder that decodes at least one of the transmitted voice signals based on the speech parameter to generate an output signal; and
(iv) a speaker that receives the output signal and produces a sound pressure wave corresponding thereto. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method in a wireless telephone, comprising:
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(a) receiving a plurality of versions of a voice signal, each version of the voice signal comprising a plurality of speech frames;
(b) decoding a speech parameter associated with a speech frame from one of the plurality of versions of the voice signal, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a corresponding speech frame from another version of the plurality of versions of the voice signal;
(c) decoding at least one of the plurality of versions of the voice signal based on the speech parameter to generate an output signal; and
(d) producing a sound pressure wave corresponding to the output signal. - View Dependent Claims (19, 20, 21, 22)
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Specification