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개선된 혼성영역 교차상관법에 의한 G.723.1의 피치검색시간 단축에 관한 연구A Study on the Pitch Search Time Reduction of G.723.1 Vocoder by Improved Hybrid Domain Cross-correlation
- Other Titles
- A Study on the Pitch Search Time Reduction of G.723.1 Vocoder by Improved Hybrid Domain Cross-correlation
- Issue Date
- Dec-2010
- Publisher
- 대한전기학회
- Keywords
- CELP; G.723.1; Open-loop pitch estimation; Cross-correlation; Bit-reversing; CELP; G.723.1; Open-loop pitch estimation; Cross-correlation; Bit-reversing
- Citation
- 전기학회논문지ABCD, v.59, no.12, pp.2324 - 2328
- Journal Title
- 전기학회논문지ABCD
- Volume
- 59
- Number
- 12
- Start Page
- 2324
- End Page
- 2328
- ISSN
- 1229-2443
- Abstract
- In this paper we proposed a new algorithm that can reduce the open-loop pitch estimation time of G.723.1. The time domain cross-correlation method is simple but has long processing time by recursive multiplication. For reduction of processing time, we use the method that compute the cross-correlation by multiplying the Fourier value of speech by it's complex conjugate. Also, we can reduce the processing time by omitting the bit-reversing of FFT and IFFT for time-frequency domain transform. As a result, the processing time of improved hybrid domain cross-correlation algorithm is reduced by 67.37% of conventional time domain cross-correlation.
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Related Researcher
- Bae, Myung Jin
- Department of IT Convergence