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성과물

특허 검색
구분 출원국
출원년도 ~ 키워드

상세정보

등록 고정 코드북의 집중 검색방법 및 장치

고정 코드북의 집중 검색방법 및 장치
이미지 확대
발명자
이응돈, 김도영, 김봉태
출원번호
10712336 (2003.11.12)
공개번호
20040098254 (2004.05.20)
등록번호
7302386 (2007.11.27)
출원국
미국
협약과제
초록
There are provided a search method of a fixed codebook, and more particularly, a focused search method and apparatus thereof, for being applied to a speech codec for Voice over Internet Protocol (VoIP). The focused search method of the fixed codebook includes: calculating absolute values of correlation vectors of respective pulse locations of tracks 0, 1, 2, and 3 and arranging the pulse locations in a descending order of the absolute values; and selecting a predetermined number of pulse locations for each track among candidate pulse locations arranged and conducting focused search of the selected result. Therefore, it is possible to significantly reduce a calculation amount required for fixed codebook search while maintaining tone quality in a similar level.
KSP 제안 키워드
Codebook search, Fixed codebook, Internet protocol(IP), Number of pulse, Voice over internet protocol, search method, speech codec
패밀리
 
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구분 특허 출원국 KIPRIS
등록 고정 코드북의 집중 검색 방법 및 장치 대한민국 KIPRIS