Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2007-10-30
2007-10-30
Chawan, Vijay (Department: 2655)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S206000
Reexamination Certificate
active
09610461
ABSTRACT:
The invention relates to a method for improving the coding accuracy and transmission efficiency of an audio signal. According to the method, a part of the audio signal to be coded is compared with earlier stored samples of the audio signal and a reference sequence of samples that best corresponds to the audio signal to be coded is identified. Predicted signals are produced from the reference sequence by means of long-term prediction, using at least two different LTP orders (M), a group of pitch predictor coefficients (b(k)) being formed for each pitch predictor order. The predicted signals for each pitch predictor order are compared with the audio signal to be coded in order to determine a prediction error. The amount of information required to code the predicted signals is compared with the amount of information required to code the original signal and a coding method that provides the best representation of the audio signal while minimising the amount of data required is selected.
REFERENCES:
patent: 5321793 (1994-06-01), Drogo De Iacovo et al.
patent: 5528629 (1996-06-01), Van der Krogt et al.
patent: 5596677 (1997-01-01), Jarvinen et al.
patent: 5611019 (1997-03-01), Nakatoh et al.
patent: 5765127 (1998-06-01), Nishiguchi et al.
patent: 5784631 (1998-07-01), Wise
patent: 5819212 (1998-10-01), Matsumoto et al.
patent: 5864798 (1999-01-01), Miseki et al.
patent: 5983173 (1999-11-01), Inoue et al.
patent: RE36721 (2000-05-01), Akamine et al.
patent: 6101464 (2000-08-01), Serizawa
patent: 6202046 (2001-03-01), Oshikiri et al.
patent: 6243672 (2001-06-01), Iijima et al.
patent: 6351730 (2002-02-01), Chen
patent: 6453288 (2002-09-01), Yasunaga et al.
patent: 6493665 (2002-12-01), Su et al.
patent: 6691084 (2004-02-01), Manjunath et al.
patent: 2021514 (1991-03-01), None
patent: 2124643 (1994-12-01), None
patent: 0 475 520 (1992-03-01), None
patent: 0 582 921 (1994-02-01), None
patent: 5-268098 (1993-10-01), None
patent: 7-336232 (1995-12-01), None
patent: 08166800 (1996-06-01), None
patent: 8-171400 (1996-07-01), None
patent: 11-177434 (1999-07-01), None
patent: WO 99/18565 (1999-04-01), None
patent: WO 99/18565 (1999-04-01), None
McClellan, et al., “Efficient Pitch Filter encoding for Variable Rate Speech Processing”, IEEE Transactions on Speech and Audio Processing, vol. 7, No. 1, Jan. 1999, pp. 18-29.
Chawan Vijay
Nokia Corporation
Opsasnick Michael N.
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