Transient signal encoding method and device, decoding method and device, and ...

US008063809B2

(12) United States Patent (10) Patent N6.= US 8,063,809 B2 Liu et al. (45) Date of Patent: Nov. 22, 2011 (54) TRANSIENT SIGNAL ENCODING METHOD (56) References Cited

U.S. PATENT DOCUMENTS 5,199,082 A 3/1993 Venema (Continued)

FOREIGN PATENT DOCUMENTS
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OTHER PUBLICATIONS

Foreign communication from a counterpart application, PCT application PCT/CN2009/076194, English Translation International Search Report dated Apr. 1, 2010, 5 pages.

(Continued)

Primary Examiner * Khai M Nguyen
(74) Attorney, Agent, or Firm *Conley Rose, P.C.; Grant
Rodolph

(57) ABSTRACT

A transient signal encoding method and device, decoding method and device, and processing system, where the transient signal encoding method includes: obtaining a reference sub -frame where a maximal time envelope having a maximal amplitude value is located from time envelopes of all subframes of an input transient signal; adjusting an amplitude value of the time envelope of each sub-frame before the reference sub-frame in such a way that a first difference is greater than a preset first threshold, in which the first difference is a difference between the amplitude value of the time envelope of each sub-frame before the reference sub-frame and the amplitude value of the maximal time envelope; and writing the adjusted time envelope into bitstream.

14 Claims, 10 Drawing Sheets

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