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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.12
- 수록면
- 1,750 - 1,754 (5page)
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초록· 키워드
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A variable bit rate speech coder is presented. The coder is based on the observation that a speech signal can be viewed as a combination of piecewise linear signals in a short time period. The encoder detects the sample points where the slope of the signal changes, which are called the inflection points in this paper. The coder transmits the location and value for the detected inflection sample, but only the location information for the noninflection samples. In the decoder, the noninflection samples are estimated with interpolation of the received information. Several factors affecting the performance of the coder have been tested through simulation. Simulation results show that the linear interpolation produces 1 ~ 5 dB improvement over the cubic spline interpolation. And the -law companding does not provide any benefit when it is applied before the inflection detection. With low threshold values in the inflection point detection, the coder shows better MOS and more than 16 dB improvement in SNR compared to the continuously variable slope delta modulation (CVSDM).
목차
Abstract
1. 서론
2. 음성부호화기의 구조
3. 가변 비트율 부호화기의 주요 인자
4. 음성신호로의 응용 및 성능 분석
5. 결론
References
참고문헌 (7)
참고문헌 신청
1. [단행본] - L. Rabiner / 1978 / Digital Processing of Speech Signals / Prentice-Hall
2. [단행본] - A. M. Kondoz / 1994 / Digital Speech / Wiley
3. [기타자료] - / 1997 / ITU-T Study Group 16, ITU-T Recommendation G.728 Annex H
4. [학술지(정기간행물)] - B. Iem / 2013 / Variable bit-rate speech coding technique based on inflection point detection / Journal of Acoustical Society of America
6. [학술지(정기간행물)] - B. Boashash / 1992 / Estimating and interpreting the instantaneous frequency of a signal-Part 2: algorithms and applications / Proc. of the IEEE 80 : 540 ~ 568
2. [단행본] - A. M. Kondoz / 1994 / Digital Speech / Wiley
3. [기타자료] - / 1997 / ITU-T Study Group 16, ITU-T Recommendation G.728 Annex H
4. [학술지(정기간행물)] - B. Iem / 2013 / Variable bit-rate speech coding technique based on inflection point detection / Journal of Acoustical Society of America
6. [학술지(정기간행물)] - B. Boashash / 1992 / Estimating and interpreting the instantaneous frequency of a signal-Part 2: algorithms and applications / Proc. of the IEEE 80 : 540 ~ 568
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