Audio-signal time-axis expansion/compression method and device

Details Audio-signal time-axis expansion/compression method and device Audio-signal time-axis expansion/compression method and device

2007-04-23

2011-12-27

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

C704S503000

Reexamination Certificate

active

08085953

ABSTRACT:
An audio-signal time-axis expansion/compression method for subjecting an audio signal to time-axis expansion/compression at a time domain includes the steps of: cross-fade-signal generating wherein a first period and a second period which are similar within the audio signal are employed to generate the cross-fade signal of the first period signal and the second period signal; correction-signal generating wherein the difference signal between the first period signal and the second period signal is subjected to time-axis reversal, and is multiplied with a window function to generate a correction signal; and connection-waveform generating wherein the cross-fade signal and the correction signal are added to generate a connection waveform for subjecting the audio signal to time-axis expansion/compression at the time domain.

REFERENCES:
patent: 5611018 (1997-03-01), Tanaka et al.
patent: 5873059 (1999-02-01), Iijima et al.
patent: 6169240 (2001-01-01), Suzuki
patent: 7010491 (2006-03-01), Kikumoto
patent: 04-289900 (1992-10-01), None
patent: 2004-354462 (2004-12-01), None
Naotaka Morita et al., Time-Scale Expansion/Compression for Speech by Use of Pointer Interval Control Overlap and Add (PICOLA) and Its Evaluation, Accoustical Society of Japan Collected Papers, Oct. 1986, pp. 149-150.
Office Action received from the Japanese Patent Office in corresponding Japanese Patent Application No. 2006-119731, on May 31, 2011.

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