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:
Sep. 20, 2011
Filed:
Jan. 30, 2008
Nam-suk Lee, Suwon-si, KR;
Geon-hyoung Lee, Hwaseong-si, KR;
Jae-one OH, Yongin-si, KR;
Chul-woo Lee, Suwon-si, KR;
Jong-hoon Jeong, Suwon-si, KR;
Nam-suk Lee, Suwon-si, KR;
Geon-hyoung Lee, Hwaseong-si, KR;
Jae-one Oh, Yongin-si, KR;
Chul-woo Lee, Suwon-si, KR;
Jong-hoon Jeong, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
Provided are a methods and apparatuses for encoding/decoding an audio signal to efficiently encode/decode a harmonic envelope. The method of encoding an audio signal includes performing harmonic analysis with respect to an input signal to determine harmonic parameters with respect to harmonic signals; correlating the amplitudes of the harmonic signals to signals in a time domain instead of signals in a frequency domain; applying a time-frequency transformation operation to the amplitudes in the time domain to generate time-frequency transformed values in the frequency domain; and encoding the time-frequency transformed values. When expressing a harmonic envelope, the amplitudes of the harmonic signals are regarded as signals in the time domain so as to perform a time-frequency transformation and only a part from among the transformed values is selected to be encoded. Therefore, sound quality is not affected and coding efficiency greatly improves.