Volume 9 Number 5 (May 2014)
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JCP 2014 Vol.9(5): 1201-1208 ISSN: 1796-203X
doi: 10.4304/jcp.9.5.1201-1208

Fast Mode Decision and Encryption Policy in H.264/AVC Frame-skipping Transcoding

Xiaohong Zhang, Baolin Qiu
School of Information Engineering /Jiangxi University of Science and Technology, Ganzhou, China

Abstract—H.264/AVC adopts Rate-Distortion Optimization (RDO) techniques to search all the prediction modes supported by standard in turn, then determine the optimal encoding mode which has the minimum rate-distortion cost. Frame-skipping transcoding among heterogeneous networks is a way to lower bitrate transcoding, which can solve incompatibility issues of video stream transmission. Aiming to varied motion problem of the video sequences, this paper introduces a set of adaptive threshold for inter mode decision, which can make a more correct code judgment of motion characteristics for the macroblock, also can obtain more reliable video quality; Combing the mode information of the skipping frame which can not be recovered, a simple and practicable encryption policy is introduced here, which avoids the shortcomings of traditional encryption algorithm complexity. Experimental results show that the encoding time of the new algorithm is almost the same with that of the referenced algorithm, the peak value SNR increases steadily, so novel scheme guarantees nice video quality; Encryption policy achieves the desired encryption effect and efficiency, and broadens the applications of the video security technology.

Index Terms—H.264/AVC; frame-skipping transcoding; adaptive threshold; inter mode decision; encryption

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Cite: Xiaohong Zhang, Baolin Qiu, "Fast Mode Decision and Encryption Policy in H.264/AVC Frame-skipping Transcoding," Journal of Computers vol. 9, no. 5, pp. 1201-1208, 2014.

General Information

ISSN: 1796-203X
Abbreviated Title: J.Comput.
Frequency: Bimonthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat,etc
E-mail: jcp@iap.org
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