Data processing: speech signal processing – linguistics – language – Speech signal processing – Synthesis
Patent
1996-01-29
1998-08-11
Tung, Kee M.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Synthesis
704226, 704262, 704264, G10L 502
Patent
active
057941998
ABSTRACT:
To overcome the problem of poor representation of the background noise, the present invention includes a noise parameter generator (40) which uses a weighted average of auto-correlation values of the input signal generated during the noise-analysis phase. The weighting function gives less weight to the auto-correlations during the first few frames (as they may contain speech) and more weight to frames towards the end of this phase. Also included, to overcome the bursty nature of comfort noise, is a comfort noise generator (50) which gradually changes the nature of the signal from speech to pseudo-random noise after the speech-burst. The comfort noise generator (50) of the present invention excites the auto-regressive filter corresponding to the noise model with a weighted combination of the past excitation and pseudo-random noise.
REFERENCES:
patent: 4771465 (1988-09-01), Bronson et al.
patent: 4797926 (1989-01-01), Bronson et al.
patent: 4899385 (1990-02-01), Ketchum et al.
patent: 4910781 (1990-03-01), Ketchum et al.
patent: 5091945 (1992-02-01), Kleijn
patent: 5267317 (1993-11-01), Kleijn
patent: 5475712 (1995-12-01), Sasaki
patent: 5537509 (1996-07-01), Swaminathan et al.
patent: 5539858 (1996-07-01), Sasaki et al.
patent: 5553192 (1996-09-01), Hayata
patent: 5630016 (1997-05-01), Swaminathan et al.
W.B. Kleijn, et al., "Fast Methods for the CELP Speech Coding Algorithm", IEEE Transactions on Acoustics Speech and Signal Processing, vol. 38, No. 8, Aug. 1990, pp. 1330-1342.
W.B. Kleijn, et al., "An Efficient Stochastically Excited Linear Predictive Coding Algorithm for High Quality Low Bit Rate Transmission of Speech", Speech Communication, vol. 7, No. 3, Elsevier Science Publishers B.V. (North-Holland), 1988, pp. 305-316.
W.B. Kleijn, et al., "Improved Speech Quality and Efficient Vector Quantization in SELP", IEEE, International Conference on Acoustics, Speech, and Signal Processing, Apr. 1988, New york, USA, pp. 155-158.
LeBlanc Wilfrid P.
Rao Ajit V.
Donaldson Richard L.
Texas Instruments Incorporated
Troike Robert L.
Tung Kee M.
Wlliams Tammy L.
LandOfFree
Method and system for improved discontinuous speech transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for improved discontinuous speech transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for improved discontinuous speech transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-403601