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一種改進(jìn)的可分級(jí)視頻編碼方法及其網(wǎng)絡(luò)傳輸研究

張方,  吳成柯,  程培星,  肖嵩

張方, 吳成柯, 程培星, 肖嵩. 一種改進(jìn)的可分級(jí)視頻編碼方法及其網(wǎng)絡(luò)傳輸研究[J]. 電子與信息學(xué)報(bào), 2005, 27(1): 108-111.
引用本文: 張方, 吳成柯, 程培星, 肖嵩. 一種改進(jìn)的可分級(jí)視頻編碼方法及其網(wǎng)絡(luò)傳輸研究[J]. 電子與信息學(xué)報(bào), 2005, 27(1): 108-111.
Zhang Fang, Wu Cheng-ke, Cheng Pei-xing, Xiao Song. Research on an Improved Scalable Video Coding and the Network Transmission[J]. Journal of Electronics & Information Technology, 2005, 27(1): 108-111.
Citation: Zhang Fang, Wu Cheng-ke, Cheng Pei-xing, Xiao Song. Research on an Improved Scalable Video Coding and the Network Transmission[J]. Journal of Electronics & Information Technology, 2005, 27(1): 108-111.

一種改進(jìn)的可分級(jí)視頻編碼方法及其網(wǎng)絡(luò)傳輸研究

Research on an Improved Scalable Video Coding and the Network Transmission

  • 摘要: 該文提出了一種改進(jìn)的可分級(jí)視頻編碼方法。為了適應(yīng)流媒體的分層傳輸要求,該方法通過(guò)對(duì)DCT系數(shù)量化殘差的位平面編碼產(chǎn)生視頻流的增強(qiáng)層部分,其基本層碼流由更多的子基本層組成,各子基本層通過(guò)宏塊級(jí)DCT系數(shù)重排及VLC重組生成。同時(shí),該文設(shè)計(jì)了一種針對(duì)該分層視頻流數(shù)據(jù)的網(wǎng)絡(luò)傳輸自適應(yīng)不等重丟包保護(hù)(AUPLP)策略,在估計(jì)當(dāng)前可利用帶寬資源的基礎(chǔ)上,實(shí)時(shí)調(diào)整不同層數(shù)據(jù)的保護(hù)力度,并控制傳輸截?cái)嗟膶訑?shù)。仿真結(jié)果表明,與傳統(tǒng)方法相比該文方案在低帶寬時(shí)可獲得平均1.2dB的編碼增益,AUPLP的應(yīng)用也大大改善了視頻流媒體的傳輸質(zhì)量。
    Abstract: An improved scalable video coding scheme is proposed in this paper. The method generates the base layer including some sub-base layers by DCT coefficients reordering and VLC reshuffling, and the residues between the original DCT coefficients and the reconstructed DCT coefficients of the base layer are encoded in the enhancement layer with bit-plane coding technology. To transmit the layered streaming video generated by the proposed scheme over the IP network, an Adaptive Unequal Packet Loss Protect (AUPLP) strategy is designed to determine the current available network bandwidth and adjust sending rates according to different situation. Experimental results show that the proposed scheme can improve the average coding efficiency up to 1.2dB compared with conventional methods in low bandwidth, and the AUPLP strategy can further improve the performances of video network transmission system.
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  • MPEG video group. FGS VM v3.0. ISO/IEC JTC1/SC29/WG1 1.N3097, Maui. USA, Dec. 1999.[2]Radha H M, Van der Schaar M, Chen Yingwei. The MPEG-4fine-grained scalable video coding method for multimedia streaming over IP[J].IEEE Trans. on Multimedia.2001, 3(1):53-[3]Li W. Bitplane coding of DCT coefficients for fine granularity scalability. ISO/IEC JTC1/SC29/WG11, MPEG98/M3989, Oct.1998.[4]Wu Feng, Li Shipeng, Zhang Y Q. A framework for efficient progressive fine granularity scalable video coding. IEEE Trans.on CASVT, 2001, 11(3): 332 - 344.[5]Wu Feng, Li Shipeng, Yan Rong, Sun Xiaoyan, Zhang Yaqin.Efficient and universal scalable video coding. ICIP 2002,Rochester, September 2002, 2:37 - 40.[6]Sun X, Wu F, Li S, Gao W, Zhang Y Q. Macroblock-based progressive fine granularity scalable video coding. IEEE International Conference on Multimedia and Expo (ICME),Tokyo, Aug. 2001:461 - 464.[7]Peng W S, Chen Y K. Mode-adaptive fine granularity scalability.ICIP 2001, Greece, Oct. 2001:993 - 996.[8]Tin Tak Cheung, So M S, Cheng R S K, Leatief K B. Adaptive unequal error protection and VLC reshuffling of image transmission over wireless channels. Vehicular Technology Conference Proceedings, Tokyo, May 15-18, 2000, 2:800 - 804.[9]Zhang Qian, Zhu Wenwu, Zhang Y Q. Resource allocation for multimedia streaming over the internet[J].IEEE Trans. on Multimedia.2001, 3(3):339-
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  • 收稿日期:  2003-07-02
  • 修回日期:  2004-01-12
  • 刊出日期:  2005-01-19

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