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IEICE Transactions on Information and Systems 2006 E89-D(8):2448-2451; doi:10.1093/ietisy/e89-d.8.2448
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Copyright © 2006 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Networks

Robust Delay Control for Audio Streaming over Wireless Link

Hyo Jin CHOI1, Jinhwan JEON1, Taehyoun KIM2, Hyo-Joong SUH3 and Chu Shik JHON4

1 The authors are with the GCT Research, Inc., Korea., 2 The author is with the Faculty of Department of Mechanical and Information Engineering, University of Seoul, Korea. E-mail: thkim{at}uos.ac.kr, 3 The author is with the Faculty of School of Computer Science and Information Engineering, Catholic University, Korea., 4 The author is with the Faculty of School of Electrical Engineering and Computer Science, Seoul National University, Korea.

The audio delay is becoming an important factor in audio streaming over short-range wireless network. In this study, we propose an efficient two-level delay control method, called frame sequence adaptation and audio sampling frequency compensation, for achieving stable audio delay with a small variation. To prove the effectiveness of our scheme, we implemented and evaluated the scheme on a Bluetooth network. Experimental results show that our scheme can control audio delay robustly and remove phase shift problem in multi-channel stereophonic audio broadcasting as well.

Key Words: delay control, wireless audio streaming, frame sequence adaptation, sampling frequency compensation

Manuscript received December 19, 2005. Manuscript revised March 30, 2006.


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