[1] Qian Tuanjie, Sun Jun, Xie Rong, Su Pengcheng, et al. Scalable transcoding for video transmissionover space-time OFDM systems [J]. Journal of Southeast University (English Edition), 2005, 21 (4): 405-410. [doi:10.3969/j.issn.1003-7985.2005.04.006]

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Scalable transcoding for video transmissionover space-time OFDM systems()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

21

Issue:

2005 4

Page:

405-410

Research Field:

Information and Communication Engineering

Publishing date:

2005-12-30

Info

Title:

Scalable transcoding for video transmissionover space-time OFDM systems

Author(s):

Qian Tuanjie;  Sun Jun;  Xie Rong;  Su Pengcheng;  Wang Jia

Institute of Image Communication and Information Processing Research, Shanghai Jiaotong University, Shanghai 200030, China

Keywords:

scalable transcoding;  down-sampling;  space-time codes;  orthogonal frequency division multiplexing

PACS:

TN919

DOI:

10.3969/j.issn.1003-7985.2005.04.006

Abstract:

A new scheme combining a scalable transcoder with space time block codes(STBC)for an orthogonal frequency division multiplexing(OFDM)system is proposed for robust video transmission in dispersive fading channels.The target application for such a scalable transcoder is to provide successful access to the pre-encoded high quality video MPEG-2 from mobile wireless terminals.In the scalable transcoder, besides outputting the MPEG-4 fine granular scalability(FGS)bitstream, both the size of video frames and the bit rate are reduced.And an array processing algorithm of layer interference suppression is used at the receiver which makes the system structure provide different levels of protection to different layers.Furthermore, by considering the important level of scalable bitstream, the different bitstreams can be given different level protection by the system structure and channel coding.With the proposed system, the concurrent large diversity gain characteristic of STBC and alleviation of the frequency-selective fading effect of OFDM can be achieved.The simulation results show that the proposed schemes integrating scalable transcoding can provide a basic quality of video transmission and outperform the conventional single layer transcoding transmitted under the random and bursty error channel conditions.

References:

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Memo

Memo:

Biographies: Qian Tuanjie(1971—), male, graduate, tjqian@sjtu.edu.cn;Sun Jun(corresponding author), male, doctor, professor, sunjun@cdtv.org.cn.

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