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
1329
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 355
21 International Journal Dong-il Hyun, Donggeum Lee, Youngcheol Park, Dae Hee Youn, Jeongil Seo "Joint Channel Coding Based on Principal Component Analysis" in ETRI Journal, vol.32, issue 5, pp.831-834, 2010
20 International Journal Chi-Sang Jung, Moo Young Kim, Hong-Goo Kang "Selecting Feature Frames for Automatic Speaker Recognition Using Mutual Information" in IEEE Transactions on Audio, Speech, and Language Processing, vol.18, issue 6, pp.1332-1340, 2010
19 International Journal Bong-Jin Lee, Chi-Sang Jung, Jeung-Yoon Choi, Hong-Goo Kang "On the Importance of Transition Regions for Automatic Speaker Recognition" in IEICE Transactions on Information and Systems, vol.E93-D, No.1, pp.197-200, 2010
18 International Journal Jae-Seong Lee, Chang-Joon Lee, Young-Cheol Park, Dae Hee Youn "Efficient FFT Algorithm for Psychoacoustic Model of the MPEG-4 AAC" in IEICE Transactions on Information and Systems, vol.E92-D, No.12, pp.2535-2539, 2009
17 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
16 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
15 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
14 International Journal Jung-Won Lee, Jeung-Yoon Choi "Acoustic‐phonetic features for stop consonant place detection in clean and telephone speech" in The Journal of the Acoustical Society of America, vol.123, issue 5, 2008
13 International Journal Jungin Lee, Jeung-Yoon Choi "Detection of obstruent consonant landmark for knowledge based speech recognition" in The Journal of the Acoustical Society of America, vol.123, issue 8, 2008
12 International Journal Sukmyung Lee, Jeung-Yoon Choi "Vowel place detection for a knowledge‐based speech recognition system" in The Journal of the Acoustical Society of America, vol.123, issue 5, 2008