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Proceedings Paper

Hybrid video coding using variable size block transforms
Author(s): Mathias Wien; Achim Dahlhoff
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Paper Abstract

Adaptive Block Transforms (ABT) were recently proposed for inter coding in the emerging video coding standard H.26L. The basic idea of ABT is to connect the block size used for transform coding of the prediction error to the block size used for motion compensation. The maximum possible signal length is exploited for transform coding. In this paper, the concept variable block size transforms (VBST) is proposed for intra coding. The selection of the transform block sizes is based on a rate/distortion criterion. Several prediction modes including directional prediction are employed. In terms of PSNR the simulation results reveal better or at least comparable performance for the VBST coding scheme compared to the TML. A gain of about 0.5 dB can be observed for intra as well as for inter coding. The VBST scheme tends to preserve more detail information of the signal. Therefore, the subjective quality of the decoded video is generally increased.

Paper Details

Date Published: 4 January 2002
PDF: 12 pages
Proc. SPIE 4671, Visual Communications and Image Processing 2002, (4 January 2002); doi: 10.1117/12.453028
Show Author Affiliations
Mathias Wien, RWTH-Aachen (Germany)
Achim Dahlhoff, RWTH-Aachen (Germany)


Published in SPIE Proceedings Vol. 4671:
Visual Communications and Image Processing 2002
C.-C. Jay Kuo, Editor(s)

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