Papers

Fixed-Point Processing Optimization of Mpeg Audio Encoder Using Statistical Model

International Conference
2006~2010
작성자
한혜원
작성일
2007-05-01 22:47
조회
1271
Authors : Keun-Sup Lee, Young-Cheol Park, Dae Hee Youn

Year : 2007

Publisher / Conference : 122th Convention of Audio Engineering Society

Page : 7023

Audio applications for portable devices have two critical restrictions: small size and low power consumption. Therefore, fixed-point implementations are essential for those applications. Even with a fixed-point processor, however, the data width still is an issue because it can affect both the hardware cost and power consumption. In this paper, we propose a statistical model for the MPEG AAC audio encoder that can provide an optimal precision for the implementation. The hardware with the optimal precision, being compared with the floating-point system, is supposed to have perceptually insignificant errors at its output. To have an optimal precision for the AAC encoder, we estimate the maximum allowable amount of fixed-point arithmetic errors in the bit-allocation process using the statistical model. Finally, we present a architecture for the system appropriate for encoding the audio signals with minimum errors by the fixed-point processing. Tests showed that the fixed-point system optimized using the proposed model had sound quality comparable to the floating-point encoding system.
전체 363
28 International Conference Keun-Sup Lee, Young-Cheol Park, Dae Hee Youn "Fixed-Point Processing Optimization of Mpeg Audio Encoder Using Statistical Model" in 122th Convention of Audio Engineering Society, pp.7023, 2007
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26 International Conference Min-Seok Choi, Chang-Hyun Baik, Young-Cheol Park, Hong-Goo Kang "A Soft-Decision Adaptation Mode Controller for an Efficient Frequency-Domain Generalized Sidelobe Canceller" in ICASSP, 2007
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24 International Journal Seungil Kim, Chungyong Lee, Hong-Goo Kang "Optimum beamformer in correlated source environments" in Journal of Acoustical Society of America, vol.120, issue 6, 2006
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21 International Conference Myung-Suk Song, Chang-Heon Lee, Hong-Goo Kang "Performance Analysis of Various Single Channel Speech Enhancement Algorithms for Automatic Speech Recognition" in INTERSPEECH, 2006
20 International Conference Chang-Heon Lee, Sung-Kyo Jung, Thomas Eriksson, Won-Suk Jun, Hong-Goo Kang "An Efficient Segment-Based Speech Compression Technique for Hand-Held TTS Systems" in INTERSPEECH, 2006
19 International Conference Yang-Won Jung, Hong-Goo Kang, Hyo Jin Kim, Seung Jong Choi "Adaptive Microphone Array with Self-Delay Estimator" in The Proceedings of The AES 29th International Conference, 2006