Adaptive encoding and decoding with forward linear prediction

Details Adaptive encoding and decoding with forward linear prediction Adaptive encoding and decoding with forward linear prediction

2011-08-30

2011-08-30

Lerner, Martin (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S205000, C704S219000, C704S500000

Reexamination Certificate

active

08010348

ABSTRACT:
An adaptive encoding method includes splitting an input signal into a low-frequency band signal and a high-frequency band signal; performing forward adaptive linear prediction on the low-frequency band signal and thus filtering the low-frequency band signal; selectively performing backward adaptive linear prediction or long-term prediction on the filtered low-frequency band signal according to the analysis result of the low-frequency band signal; transforming the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, into a signal in a frequency domain and quantizing the signal; and encoding the high-frequency band signal using the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, or the quantized signal. Therefore, compression efficiency of both speech and music signals can be enhanced, and a robust compression method can be provided for various audio contents at a low bit rate.

REFERENCES:
patent: 5206884 (1993-04-01), Bhaskar
patent: 5632003 (1997-05-01), Davidson et al.
patent: 5710863 (1998-01-01), Chen
patent: 5752225 (1998-05-01), Fielder
patent: 6327562 (2001-12-01), Proust
patent: 6363338 (2002-03-01), Ubale et al.
patent: 6408267 (2002-06-01), Proust
patent: 6633841 (2003-10-01), Thyssen et al.
patent: 7498959 (2009-03-01), Lee et al.
patent: 7624022 (2009-11-01), Son et al.
patent: 7630396 (2009-12-01), Goto et al.
patent: 7664633 (2010-02-01), Den Brinker et al.
patent: 7864843 (2011-01-01), Choo et al.
patent: 2004/0024588 (2004-02-01), Watson et al.
patent: 2004/0024597 (2004-02-01), Adut
patent: 2007/0208565 (2007-09-01), Lakaniemi et al.
patent: 2007/0282599 (2007-12-01), Choo et al.
patent: 2007/0299656 (2007-12-01), Son et al.
patent: 2007/0299669 (2007-12-01), Ehara
patent: 2009/0271204 (2009-10-01), Tammi
EP Search Report issued Mar. 29, 2011 in EP Application No. 07768630.1.
Schnitzler J. et al.: “Wideband speech coding using forward/backward adaptive prediction with mixed time/frequency domain excitation”, Speech Coding Proceedings, 1999 IEEE Workshop on Porvoo, Finland 20-23 Jun. 1999, Piscataway, NJ, USE, IEEE, US, Jun. 20, 1999, pp. 4-6, XP010345568.
Lefebvre R. et al.: “High quality coding of wideband audio signals using transform coded excitation (TCX)”, Proceedings of the international conference on acoustics, Speech, and Signal processing (ICASSP) . Speech processing 1. Adelaide, Apr. 19-22, 1994, [Proceedings of the international conference on acoustics, Speech and Signal processing. (ICASSP)], vol. i., 19 Apr. 1994, pp. 1/193-1/196, XP010133560.

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