Title :
Block classification method based on human perception for dynamic bitstream scaling of MPEG video
Author :
Ichikawa, Akio ; Yoshida, Toshiyuki ; Sakai, Yoshinori
Author_Institution :
Fac. of Eng., Tokyo Inst. of Technol., Japan
Abstract :
This paper proposes a classification method of blocks in an image for the purpose of dynamic spatial bitstream scaling of MPEG video based on simple characteristics of human perception. First, we classify the blocks based on the relation between the characteristics of distorted blocks difficult to be perceived by human and the characteristics of blocks derived by the moving vectors. Then, based on this relation, we propose the bitstream scaling method for MPEG video by stripping off the DCT coefficients. An experiment using this techniques in an actual media synchronization system has illustrated the usefulness of the proposed approach
Keywords :
client-server systems; code standards; data compression; discrete cosine transforms; image classification; synchronisation; telecommunication standards; transform coding; video coding; video servers; DCT coefficients; MPEG video; bitstream scaling method; block classification method; client-server based media synchronization system; distorted blocks; dynamic bitstream scaling; dynamic spatial bitstream scaling; experiment; human perception; moving vectors; Data communication; Discrete cosine transforms; Humans; IP networks; Image edge detection; Real time systems; Streaming media; Strips; Web and internet services;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.727234
