G.729.1 코더에서 프레임 간의 상호상관 관계를 이용한 개선된 스펙트럼 포락 코딩 방법 Enhanced Spectral Envelope Coding Scheme Using Inter-frame Correlation for G.729.1

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This paper describes a new algorithm for encoding spectral envelope in the time domain alias cancellation (TDAC) part of G.729.1. The spectral envelope and modified discrete cosine transform (MDCT) coefficients of the weighted code-excited linear predictive (CELP) coding error in lower-band and the higher-band input signal are encoded in the TDAC part. In order to reduce allocation bits for spectral envelope coding, a new algorithm using sub-band correlation between adjacent frames is proposed. In addition, to improve the quality of decoded signals, two bit allocation strategies using reduced bits from the proposed algorithm are proposed. The performance of the proposed algorithm is evaluated in terms of objective quality and bit reduction rates. Experimental results show that the proposed algorithm increases the quality of sounds significantly.
Publisher
한국음성학회
Issue Date
2009-12
Language
English
Citation

말소리와 음성과학, v.1, no.4, pp.97 - 103

ISSN
2005-8063
URI
http://hdl.handle.net/10203/200053
Appears in Collection
EE-Journal Papers(저널논문)
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