상세정보
학술대회
Frame Error-robust MDCT Bit Reduction Scheme using Inter-frame Correlation for G.729.1
- 저자
- 조근석, 정상배, 김현우, 한민수
- 발행일
- 201105
- 출처
- International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2011, pp.1785-1788
- 협약과제
- 11PI1500, FMC 어커스틱 융합코덱 및 제어기술 연구, 이병선
- 초록
- In this paper, a new algorithm for encoding spectral envelope in G.729.1 for VoIP is proposed. In the TDAC part of G.729.1, the spectral envelope and MDCT coefficients extracted in the weighted CELP coding error (lower-band) and the higher-band input signal are encoded. In order to reduce allocation bits for spectral envelope coding, a new algorithm using sub-band correlation between adjacent frames is proposed. In addition, a new bit allocation strategy using reduced bits from the proposed algorithm is also proposed. The performance of the proposed algorithm is evaluated by sound quality and bit reduction rates in clean and frame loss conditions. © 2011 IEEE.
- KSP 제안 키워드
- Input signal, Reduction rate, allocation strategy, bit allocation, inter-frame correlation, new algorithm, sound quality, spectral envelope, sub-band