The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
Nov. 10, 2009
Benhao Zhang, Shanghai, CN;
Heyun Huang, Shanghai, CN;
Tan LI, Shanghai, CN;
Fuhuei Lin, Shanghai, CN;
Benhao Zhang, Shanghai, CN;
Heyun Huang, Shanghai, CN;
Tan Li, Shanghai, CN;
Fuhuei Lin, Shanghai, CN;
Spreadtrum Communications (Shanghai) Co., Ltd., Shanghai, CN;
Abstract
An audio encoding method and a corresponding decoding method are provided. Accordingly, the pre-echo effect of the audio transient signal is eliminated and the distortion of the transient signal is mitigated. The technical solution includes performing time-domain processing on an input audio transient signal; dividing sampling points x,x, . . . , xof an input frame into L segments; calculating an energy Efor each segment; calculating an average energy Efor each segment of the input frame; calculating a multiplying parameter λcorresponding to each segment by virtue of λ=r(bitrate)*E/E; multiplying the sampling points of all the segments of the input frame by corresponding multiplying parameter λ, obtaining the processed sampling points x',x′, . . . , x′; and sending the multiplying parameter λto a code stream for transportation; performing time-frequency transformation and coding on the processed sampling points x′,x′, . . . , x′ and outputting to the code stream.