Paper Info
Title
Fast Inter Mode Decision Algorithm Based on Mode Mapping and Decision Tree for P Frames in MPEG-2 to H.264/AVC Transcoding
Abstract
There is an inevitable requirement of transcoding from MPEG-2 to H.264/AVC in many video applications. Due to the use of variable block sizes and rate-distortion optimization techniques in H.264, there is extremely high computational complexity in the reference cascaded transcoder. To reduce the complexity, this paper presents a fast inter mode decision algorithm for P frames in MPEG-2 to H.264/AVC transcoding. Firstly, with the statistical analysis of the correlation between the MB's coding mode in MPEG-2 and the corresponding mode in H.264/AVC, the proposed algorithm directly determines the candidate modes for some special MBs based on the mode mapping rules. Then for other MBs, machine learning tools are used to exploit the correlation between the residual MB information in MPEG-2 and the coding mode in H.264/AVC, and the decision tree is derived to determine the candidate modes. The proposed algorithm efficiently reduces the number of candidate modes in H.264/AVC encoder. Experimental results show that the proposed algorithm can achieve 60 % of transcoding time saving on average with the less PSNR degradation and bitrate increase, comparing with the reference cascaded transcoder.
Year
DOI
Venue
2015
10.1007/s11265-013-0824-5
Journal of Signal Processing Systems
Keywords
Field
DocType
Transcoding,MPEG-2,H.264/AVC,Mode decision,Mode mapping,Decision tree
Transcoding,Decision tree,Computer science,Context-adaptive variable-length coding,Mode (statistics),Algorithm,Coding (social sciences),Real-time computing,Encoder,MPEG-2,Computational complexity theory
Journal
Volume
Issue
ISSN
79
1
1939-8018
Citations 
PageRank 
References 
0
0.34
9
Authors
3
Name
Order
Citations
PageRank
Ping Wang11012.69
Xiaodan Zhang200.34
Hua Huang380362.97