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This paper describes a new algorithm for encoding spectral shape and envelope in the generic mode of G.718 super-wide band (SWB). In the G.718 SWB coder, generic mode coding and sinusoidal enhancement are used for the quantization of modified discrete cosine transform (MDCT)-based parameters in the high frequency band. In the generic mode, the high frequency band is divided into sub-bands and for every sub-band the most similar match with the selected similarity criteria is searched from the coded and envelope normalized wideband content. In order to improve the quantization scheme in high frequency region of speech/audio signals, the modified generic mode by the improvement of the generic mode in G.718 SWB is proposed. In the proposed generic mode, perceptual vector quantization of spectral envelopes and the resolution increase for spectral copy are used. The performance of the proposed algorithm is evaluated in terms of objective quality. Experimental results show that the proposed algorithm increases the quality of sounds significantly.
목차
ABSTRACT
1. 서론
2. G.718 SWB 개요
3. G.718 SWB Generic Mode
4. 제안된 Modefied Generic Mode
5. 실험 및 결과
6. 결론
감사의 글
참고문헌
참고문헌 (8)
참고문헌 신청
2. [학술지(정기간행물)] - 김도영 / 2009 / 음성기반 오디오 융합코덱 기술동향 / 전자통신동향분석 24 (5) : 10 ~ 19
3. [학술지(정기간행물)] - 이미숙 / 2009 / 4G 모바일 증감음성 서비스를 위한 코덱 기술 동향 / 전자통신동향분석 25 (6) : 29 ~ 37
4. [기타자료] - ITU-T Rec. / 2010 / Superwideband scalable extension forG.718, New G. 718 Annex B
5. [학술지(정기간행물)] - Wang, S. / 1992 / An objectivemeasure for predicting subjective quality of speech coders / IEEE Trans. Selected Areas in Comm 10 (5) : 819 ~ 829
6. [학술지(정기간행물)] - Linde, Y. / 1980 / An Algorithm forVector Quantizer Design / IEEE Transaction onCommunications 28 (1) : 84 ~ 94
3. [학술지(정기간행물)] - 이미숙 / 2009 / 4G 모바일 증감음성 서비스를 위한 코덱 기술 동향 / 전자통신동향분석 25 (6) : 29 ~ 37
4. [기타자료] - ITU-T Rec. / 2010 / Superwideband scalable extension forG.718, New G. 718 Annex B
5. [학술지(정기간행물)] - Wang, S. / 1992 / An objectivemeasure for predicting subjective quality of speech coders / IEEE Trans. Selected Areas in Comm 10 (5) : 819 ~ 829
6. [학술지(정기간행물)] - Linde, Y. / 1980 / An Algorithm forVector Quantizer Design / IEEE Transaction onCommunications 28 (1) : 84 ~ 94
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UCI(KEPA) : I410-ECN-0101-2014-701-001338102