Data processing: speech signal processing – linguistics – language – Speech signal processing – Psychoacoustic
Reexamination Certificate
2005-07-05
2005-07-05
Lerner, Martin (Department: 2654)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Psychoacoustic
C704S501000
Reexamination Certificate
active
06915255
ABSTRACT:
Herein disclosed is an audio signal encoding apparatus comprises initial maximum scale factor band calculation means for calculating an initial maximum scale factor band for an audio signal inputted therein on the basis of the result made by the frame length determining means and the coded mode information inputted from the coded mode information means with reference to the initial maximum scale factor band information and Signal-to-Mask ratio threshold value information stored in the maximum scale factor band table storage means, and maximum scale factor band calculation means for calculating a maximum scale factor band for the audio signal on the basis of the initial maximum scale factor band calculated by the initial maximum scale factor band calculation means in accordance with the Signal-to-Mask ratio information calculated by the psychoacoustic model analyzing means, thereby making it possible to adaptively calculate the maximum scale factor band for the audio signal in accordance with the coded mode information such as bit rates and sampling frequencies.
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Bosi M. et al: “ISO/IEC MPEG-2 Advanced Audio Coding” Journal of the Audio Engineering society, Audio Engineering Society. New York, US, vol. 45, No. 10, Oct. 1, 1997, pp. 789-812, XP000730161, ISSN: 0004-7554. Abstract, p. 800, paragraph 5.5—p. 801, paragraph 5.5.2; figures 10, 11.
Lerner Martin
Matsushita Electric - Industrial Co., Ltd.
Pearne & Gordon LLP
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