Papers

On the Study of Noise Allocation for Speech Signal in Low Bit-Rate Audio Coding

International Journal
2006~2010
작성자
이진영
작성일
2009-10-01 14:19
조회
272
Authors : Chang-Heon Lee, Hyen-O Oh, Hong-Goo Kang

Year : 2009

Publisher / Conference : IEEE Signal Processing Letters

Volume : 16, issue 10

Page : 849-852

This letter proposes a new masking threshold adjustment method to improve the quality for the speech signals in low bit-rate audio coding. The Enhanced aacPlus (EAAC) audio codec increases the masking threshold of all frequency bands to be suitable for the given encoding rate by considering equal loudness noises only, which is a representative way for implementing the adjustment technique. The proposed method, however, dynamically adjusts the masking threshold of each frequency band based on the energy ratio of each band to the average band energy. More quantization noises are added to formant regions that have relatively large energy ratio values, but less distortion is allowed in spectral valley regions, which eventually helps to enhance perceptual quality for speech signals. The proposed idea reflects the spectral weighting criterion in searching optimal excitation codebooks used in many speech coding algorithms. Simulation results confirm that the proposed method implemented on the EAAC coder improves quality for the speech input signals at the same bit-rate while keeping equivalent quality for music contents.
전체 326
136 Domestic Conference 신호선, 최가원, 최정윤, 강홍구 "미소 지으며 발화하는 음성의 포먼트 분석" in 한국음향학회 추계학술대회 제28권 제2(s)호, pp.10, 2009
135 International Conference SoonHo Beak, Myung-Suk Song, Seok-Pil Lee, Hong-Goo Kang "Speaker Array System Based on Equalization Method with a Quiet Zone" in 127th Convention of Audio Engineering Society, pp.7951, 2009
134 International Conference Dongil Hyun, Jeongil Seo, Youngcheol Park, Daehee Youn "Robust Interchannel Correlation (ICC) Estimation Using Constant Interchannel Time Difference (ICTD) Compensation" in 127th Convention of Audio Engineering Society, pp.7934, 2009
133 International Journal Chang-Heon Lee, Hyen-O Oh, Hong-Goo Kang "On the Study of Noise Allocation for Speech Signal in Low Bit-Rate Audio Coding" in IEEE Signal Processing Letters, vol.16, issue 10, pp.849-852, 2009
132 Domestic Conference 이동금, 서정일, 박영철, 윤대희 "MPEG Surround 멀티채널 부호화기의 디코릴레이션 필터 개선 방법" in 한국통신학회, pp.519-522, 2009
131 International Journal Bong-Jin Lee, Jeung-Yoon Choi, Hong-Goo Kang "Phonetically optimized speaker modeling for robust speaker recognition" in The Journal of the Acoustical Society of America, vol.126, issue 3, 2009
130 International Conference Jae-Mo Yang, Chang-Heon Lee, Hong-Goo Kang "A robust time difference of arrival estimator in reverberant environments" in EUSIPCO, 2009
129 International Conference Ho Seon Shin, Hong-Goo Kang, Min-Seok Choi, Taesu Kim "SPEECH REINFORCEMENT BASED ON BINAURAL LOUDNESS MODEL" in The Fourth Beijing-Hong Kong International Doctoral Forum, 2009
128 International Journal Tacksung Choi, Sunkuk Moon, Young-Cheol Park, Dea Hee Youn, Seokpil Lee "A GMM-Based Feature Selection Algorithm for Multi-Class Classification" in IEICE Transactions on Information and Systems, vol.E92-D. No.8, pp.1584-1587, 2009
127 Domestic Journal 정양원, 오현오 "오디오 객체 부호화 표준 - MPEG SAOC" in 한국음향학회지, vol.28, 제 7호, pp.630-639, 2009