Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1996-04-30
1998-08-11
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704230, 704228, 704265, G10L 918
Patent
active
057941807
ABSTRACT:
A quantizer and a low bit rate communication system using the quantizer is described. The quantizer includes a 3-bit and 5-bit encoder where the 3-bit encoder provides the encoded gain for a first half of a sampled frame of speech and the second encoder for the second half of the frame of speech. A special 3-bit code is provided when a steady state is determined by comparing the 3-bit code and neighboring 5-bit codes. The decoder in the system when detecting the special code provides an average of the 5-bit codes if the decoded 5-bit code is within 5 dB of the previous 5-bit code.
REFERENCES:
patent: 4392018 (1983-07-01), Fette
patent: 4701955 (1987-10-01), Taguchi
patent: 5471558 (1995-11-01), Tsutsui
Brady III Wade James
Donaldson Richard L.
Hudspeth David R.
Storm Donald L.
Texas Instruments Incorporated
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