Vector quantization for efficient coding of upper subbands [microform] / W.J. Zeng, Y.F. Huang.
This paper examines the application of vector quantization (VQ) to exploit both intra-band and inter-band redundancy in subband coding. The focus here is on the exploitation of inter-band dependency. It is shown that VQ is particularly suitable and effective for coding the upper subbands. Three subb...
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| Format: | Government Document Microfilm Book |
| Language: | English |
| Published: |
[Washington, DC] : [Springfield, Va.] :
[National Aeronautics and Space Administration] ; [National Technical Information Service, distributor],
[1994]
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| Series: | NASA contractor report ;
NASA CR-196804. |
| Subjects: |
MARC
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| 100 | 1 | |a Zeng, W. J. | |
| 245 | 1 | 0 | |a Vector quantization for efficient coding of upper subbands |h [microform] / |c W.J. Zeng, Y.F. Huang. |
| 260 | |a [Washington, DC] : |b [National Aeronautics and Space Administration] ; |a [Springfield, Va.] : |b [National Technical Information Service, distributor], |c [1994] | ||
| 300 | |a 1 volume. | ||
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| 490 | 1 | |a [NASA contractor report] ; |v NASA CR-196804. | |
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| 500 | |a Shipping list number: 95-0068-M. | ||
| 520 | |a This paper examines the application of vector quantization (VQ) to exploit both intra-band and inter-band redundancy in subband coding. The focus here is on the exploitation of inter-band dependency. It is shown that VQ is particularly suitable and effective for coding the upper subbands. Three subband decomposition-based VQ coding schemes are proposed here to exploit the inter-band dependency by making full use of the extra flexibility of VQ approach over scalar quantization. A quadtree-based variable rate VQ (VRVQ) scheme which takes full advantage of the intra-band and inter-band redundancy is first proposed. Then, a more easily implementable alternative based on an efficient block-based edge estimation technique is employed to overcome the implementational barriers of the first scheme. Finally, a predictive VQ scheme formulated in the context of finite state VQ is proposed to further exploit the dependency among different subbands. A VRVQ scheme proposed elsewhere is extended to provide an efficient bit allocation procedure. Simulation results show that these three hybrid techniques have advantages, in terms of peak signal-to-noise ratio (PSNR) and complexity, over other existing subband-VQ approaches. | ||
| 530 | |a Also available online via NASA handle. | ||
| 533 | |a Microfiche. |b [Washington, D.C. : |c National Aeronautics and Space Administration, |d 1994] |e 1 microfiche. | ||
| 650 | 7 | |a Coding. |2 nasat. | |
| 650 | 7 | |a Image processing. |2 nasat. | |
| 650 | 7 | |a Redundancy encoding. |2 nasat. | |
| 650 | 7 | |a Vector quantization. |2 nasat. | |
| 650 | 7 | |a Video compression. |2 nasat. | |
| 650 | 0 | |a Image processing. |0 http://id.loc.gov/authorities/subjects/sh85064446. | |
| 700 | 1 | |a Huang, Y. F. | |
| 710 | 1 | |a United States. |b National Aeronautics and Space Administration. |0 http://id.loc.gov/authorities/names/n78087581 |1 http://isni.org/isni/0000000449071619. | |
| 830 | 0 | |a NASA contractor report ; |v NASA CR-196804. |0 http://id.loc.gov/authorities/names/n83825229. | |
| 856 | 4 | 1 | |z Click here to view online |u http://hdl.handle.net/2060/19950005349 |
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