Adaptive postfiltering methods and systems for decoding speech

Details Adaptive postfiltering methods and systems for decoding speech Adaptive postfiltering methods and systems for decoding speech

2002-08-09

2011-10-04

Wozniak, James S. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S226000, C704S227000, C704S228000, C704S216000, C704S219000, C704S220000, C704S223000, C704S232000, C704S201000, C704S500000, C704S501000, C704S502000, C704S503000, C704S504000

Reexamination Certificate

active

08032363

ABSTRACT:
A method of processing a decoded speech (DS) signal including successive DS frames, each DS frame including DS samples. The method comprises: adaptively filtering the DS signal to produce a filtered signal; gain-scaling the filtered signal with an adaptive gain updated once a DS frame, thereby producing a gain-scaled signal; and performing a smoothing operation to smooth possible waveform discontinuities in the gain-scaled signal.

REFERENCES:
patent: 4617676 (1986-10-01), Jayant et al.
patent: 4969192 (1990-11-01), Chen et al.
patent: 5615298 (1997-03-01), Chen
patent: 5664055 (1997-09-01), Kroon
patent: 5680507 (1997-10-01), Chen
patent: 5752222 (1998-05-01), Nishiguchi et al.
patent: 5864798 (1999-01-01), Miseki et al.
patent: 5890108 (1999-03-01), Yeldener
patent: 5953697 (1999-09-01), Lin et al.
patent: 5999899 (1999-12-01), Robinson
patent: 6073092 (2000-06-01), Kwon
patent: 6104992 (2000-08-01), Gao et al.
patent: 6173255 (2001-01-01), Wilson et al.
patent: 6330533 (2001-12-01), Su et al.
patent: 6826527 (2004-11-01), Unno
patent: 0 732 687 (1996-09-01), None
Chen and Gersho, “Real-time vector APC speech coding at 48000 bps with adaptive postfiltering”, Proc. Int. Cobnf. Acoust., Speech, Signal Processing, ASSP-29(5), pp. 1062-1066 (Oct. 1987).
Chen 1989“A robust low-delay CELP speech coder at 16 kbits/s,” Proc. IEEE Global Commun. Conf., (Nov. 1989), pp. 1237-1241.
Chen 1990 “High-quality 16 kb/s speech coding with a one-way delay less than 2 ms,” Proc. IEEE Int. Conf. Acoust., Speech, Signal Processing, (Apr. 1990), pp. 453-456 (Apr. 1990).
Chen et al. “Real-time implementation of a 16 kb/s low-delay CELP speech coder,” Proc. IEEE Int. Conf. Acoust., Speech, Signal Processing, (Apr. 1990), pp. 181-184.
European Search Report issued Jun. 3, 2004 in EP Appl. No. 02256894.3, (3 pages).
European Search Report issued Jun. 7, 2004 in EP Appl. No. 02256895.0, (2 pages).
European Search Report issued Jun. 8, 2004 in EP Appl. No. 02256896.8, (3 pages).
Chen, J-H and Gersho, A., “Real-Time Vector APC Speech Coding at 4800 BPS with Adaptive Postfiltering,”Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, Apr. 1987, vol. 4, pp. 2185-2188.
Chen, J-H. And Gersho, A., “Adaptive Postfiltering for Quality Enhancement of Coded Speech,”IEEE Transactions on Speech and Audio Processing, IEEE, vol. 3, No. 1, Jan. 1995, pp. 59-71.
Gerson, I. and Jasiuk, M., “Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 KBPS,”Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, Apr. 1990, pp. 461-464.
U.S. Appl. No. 10/183,554, filed Jun. 28, 2002, Juin-Hwey Chen et al.
U.S. Appl. No. 10/183,418, filed Jun. 28, 2002, Jes Thyssen et al.
Mustapha, A. and Yeldener, S., “An Adaptive Post-Filtering Technique Based on the Modified Yule-Walker Filter,”Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, vol. 1, Mar. 1999, pp. 197-200.
Salami, R. et al., “Design and Description of CS-ACELP: A Toll Quality 8 kb/s Speech Coder,”IEEE Transactions on Speech and Audio Processing, IEEE, vol. 6, No. 2, Mar. 1998, pp. 116-130.
Yatsuzuka, Y. et al., “A Variable Rate Coding by APC with Maximum Likelihood Quantization from 4.8 KBIT/S to 16 KBIT/S,”Proceedings of the IEEE Acoustics, Speech, and Signal Processing Society, IEEE, vol. 4, Apr. 1986, pp. 3071-3074.

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