Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Patent
1997-02-03
1998-10-06
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
704208, 704215, 704226, 704227, G01L 900
Patent
active
058192182
ABSTRACT:
A voice encoder which pauses outputting codewords in accordance with the absence of voice activity. An input aural signal is divided into frames and inputted to the voice encoder. The voice encoder has a voice activity detection circuit for determining at each frame whether voice activity is absent or present, a voice encoding circuit, a background noise update judging circuit for detecting a change in the characteristics of the input aural signal, and a control circuit. If the absence of voice activity is detected, the control circuit causes the frame at that time to be encoded as a background noise frame, and then pauses the operation of the voice encoding circuit. If the presence of voice activity is detected, the operation of the voice encoding circuit is resumed. Furthermore, if the voice encoding circuit is not in operation when a change in the characteristics of the input aural signal is detected, the control circuit causes the voice encoding circuit to encode the frame at that time as a background noise frame and then again stop the operation of the voice encoding circuit.
REFERENCES:
patent: 4817157 (1989-03-01), Gerson
patent: 4918734 (1990-04-01), Muramatsu et al.
patent: 5293450 (1994-03-01), Kane et al.
patent: 5410632 (1995-04-01), Hong et al.
patent: 5475712 (1995-12-01), Sasaki
patent: 5490231 (1996-02-01), Kane et al.
patent: 5537509 (1996-07-01), Swaminathan et al.
patent: 5539858 (1996-07-01), Sasaki et al.
patent: 5555546 (1996-09-01), Matsumoto et al.
patent: 5630016 (1997-05-01), Swaminathan et al.
GSM Full-rate Speech Transcoding, (ETSI/PT 12, GSM Recommendation 06.10, Jan. 1990).
Discontinuous Transmission (DTx) for Full-rate Speech Traffic Channels (ETSI/PT 12 GSM Recommendation 06.31, Jan. 1990).
Hayata Toshihiro
Unno Yoshihiro
Chawan Vijay B.
Hudspeth David R.
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