Abstract
We propose a low-complexity, wavelet transform based video codec that transmits composite frames that include both intra- and inter-frame regions. Intra/inter partitioning is performed with the goal of minimising the error in the decoded video sequence. The image is partitioned in the wavelet domain by selecting combinations of spatially oriented coefficient trees. We evaluate a simple selection method based on comparison of tree variance. Optimal partitions can be found using a steepest descent search of the combination space, though this is computationally expensive. Results demonstrate that optimal intra/inter partitionining provides a significant improvement in objective and subjective quality when compared to a conventional interframe codec
| Original language | English |
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| Pages | 768-771 vol.3 |
| Publication status | Published - 2001 |
| Event | Image Processing, 2001. Proceedings. 2001 International Conference on - Duration: 1 Jan 2001 → … |
Conference
| Conference | Image Processing, 2001. Proceedings. 2001 International Conference on |
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| Period | 1/01/01 → … |
Keywords
- video compression
- depth band masking quantiser
- low-complexity video codec
- Huffman entropy coding
- objective quality
- decoding
- selection method
- intra-frame regions
- video codecs
- data compression
- optimum intra/inter partitioning
- interframe codec
- decoded video sequence
- wavelet domain
- wavelet transforms
- subjective quality
- wavelet transform based video codec
- combination space
- search problems
- inter-frame regions
- video coding
- transform coding
- steepest descent search
- spatially oriented coefficient trees
- tree variance
- optimisation