Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1998-02-27
2000-08-15
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704201, 704222, 704230, G10L 1100, G10L 1914
Patent
active
061049913
ABSTRACT:
The present invention relates to a speech encoder/decoder system employing digital transmission in which the encoding and decoding operations are complimentary, and these operations make use of sets of parameters which may be optimized for a speaker and for a particular digital radio link. A number of sets of parameters are determined experimentally, for example, by employing human sample groups in which perceived audio and transmission quality are tested. The encoder/decoder system then employs a group, or number, of sets of parameters serving all speakers rather than employing one fixed set of parameters. The particular set of parameters for a speaker in the encoder of a first transceiver is determined by a processor which receives values based on an analysis of the input audio signal, and then a parameter set identifier is sent within the digital signal for use by a decoder of a second transceiver. In addition, the processor of the first transceiver which receives a signal from the second transceiver may include circuitry which monitors the signal to noise ratio and bit error rate of the channel to provide a second criteria in addition to the received values based on the analysis of the input audio signal for choosing a particular set of parameters for the encoder.
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Franceschi Albert V.
Lenn Howard
Newland Paul B.
Azad Abul K.
Hudspeth David R.
Lucent Technologies - Inc.
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