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Proceedings Paper

Performance analysis of 3D subband coding for low-bit-rate video
Author(s): Andre Mainguy; Limin Wang
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Paper Abstract

Two prevalent approaches for video coding are hybrid motion compensated DCT coding (MC/DCT) and subband coding. Hybrid MC/DCT coding has been adopted in present standards for low bit rate digital video compression such as ITU-T Recommendations H.261 and H.263. One problem with hybrid MC/DCT coding is that blocking artifacts in the reconstructed video sequences are prominent at low bit rates due to block segmentation of the image. Unlike block transform coding, subband coding does not suffer from these 'blocking' effects. A significant issue for the subband video coder is to fully exploit the temporal redundancy prevailing in video images for efficient video coding. More recent studies have addressed this problem using the three- dimensional (3-D) subband framework. In this study, a packet wavelet processing scheme is implemented to exploit temporal redundancy in video sequences. A bit allocation strategy is proposed and applied to the coding of the temporal subbands performed in an embedded fashion. The coding performance of the resulting 3-D wavelet subband video coder is compared with the H.261 coder at a bit rate of 384 kbps and CIF resolution, and with the H.263 coder at 64 kbps and QCIF resolution. Test sequences are selected to cover a reasonable range of scene contents.

Paper Details

Date Published: 16 September 1996
PDF: 8 pages
Proc. SPIE 2952, Digital Compression Technologies and Systems for Video Communications, (16 September 1996); doi: 10.1117/12.251290
Show Author Affiliations
Andre Mainguy, Communications Research Ctr. (Canada)
Limin Wang, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 2952:
Digital Compression Technologies and Systems for Video Communications
Naohisa Ohta, Editor(s)

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