Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Patent
1997-06-27
1999-03-16
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
704228, 704265, G10L 302
Patent
active
058842683
ABSTRACT:
A processing system time compresses a voice message before transmission, and processing system time expands the message after reception. To process the message the processing systems perform at least one of: (a) randomizing the order of a sequence of samples form a silent portion of the message after reception thereof before blending the sequence with a last portion of the expanded message; (b) selecting the sequence of samples from the silent portion of the message after reception thereof, the sequence selected being poorly correlated with the last portion of the expanded message, before blending the sequence with the last portion of the message; and (c) compressing the dynamic range of the message before transmission, by an amount dependent upon the signal-to-noise ratio of the message, and aggressively expanding the dynamic range of the message after reception, by a fixed amount.
REFERENCES:
patent: 4875038 (1989-10-01), Siwiak et al.
patent: 5175769 (1992-12-01), Hejna, Jr. et al.
patent: 5450449 (1995-09-01), Kroon
patent: 5471470 (1995-11-01), Sharma et al.
patent: 5689440 (1997-11-01), Leitch et al.
Bastien Wade Alan
Calie Deborah Ann
Campbell William Michael
Rapp Robert Andrew
Sumner Terence Edward
Breeden R. Louis
Hudspeth David R.
Motorola Inc.
Storm Donald L.
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