Matches in SemOpenAlex for { <https://semopenalex.org/work/W2790242495> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W2790242495 abstract "Images and video are a very challenging topic in multimedia applications. Recently, with the explosion of the Internet, multiresolution source codes are necessary to better suit to the heterogeneity of the networks. This thesis first proposes a new wavelet-based image coding algorithm that takes benefit of a rate-distortion optimization truncation scheme at the encoder as well as an embedded bit stream at the decoder. The rate-distortion optimization is performed via Space-Frequency Quantization (SFQ) in which a zerotree pruning process is used to zero out insignificant wavelet coefficients. In this new SFQ algorithm, wavelet trees are mapped only one time via C structures to achieve a simpler manipulation of wavelet coefficients as well as a fast pruning process. Arithmetic coding is used after uniform quantization of the remaining wavelet coefficients to increase the compression ratio. Although the decoder is only optimal for rates fixed during the encoding, the proposed scheme achieves performances competitive with results published so far in the literature. To further compress wavelet coefficients, uniform quantization is replaced by Trellis-Coded Quantization to generate a progressive image coder using Trellis-Coded SFQ. The basic idea of the Trellis-Coded Space-Frequency Quantization (TCSFQ) is to take benefit from both SFQ and TCQ schemes: TCQ is only applied on a subset of wavelet coefficients while the other coefficients are discarded. For progressive transmission, we use an approximation to estimate Trellis-Coded Quantization indices partially transmitted when decoding at lower rates than the encoding one. Then, a progressive rate-distortion three-dimensional (3-D) wavelet video coder is presented by extending the concept of SFQ from 2-D to 3-D. A memory-constrained lifting-based 3-D wavelet transform is first deployed to process one part of the sequence at a time continuously, thus eliminating the boundary effects over groups of pictures. After 3-D SFQ, in which a rate-distortion based spatial-temporal tree-pruning process is used in conjunction with uniform quantization of wavelet coefficients, an efficient 3-D entropy coder is applied. Finally, a progressive 3-D TCSFQ coder is designed by extending TCSFQ to 3-D. Both 3-D SFQ and 3-D TCSFQ video coders outperform MPEG-4 for most sequences at the same bit rate." @default.
- W2790242495 created "2018-03-29" @default.
- W2790242495 creator A5089365893 @default.
- W2790242495 date "2000-01-01" @default.
- W2790242495 modified "2023-09-23" @default.
- W2790242495 title "Wavelet-based progressive image and video coding using trellis-coded space-frequency quantization" @default.
- W2790242495 hasPublicationYear "2000" @default.
- W2790242495 type Work @default.
- W2790242495 sameAs 2790242495 @default.
- W2790242495 citedByCount "0" @default.
- W2790242495 crossrefType "journal-article" @default.
- W2790242495 hasAuthorship W2790242495A5089365893 @default.
- W2790242495 hasConcept C105795698 @default.
- W2790242495 hasConcept C11413529 @default.
- W2790242495 hasConcept C115961682 @default.
- W2790242495 hasConcept C118505674 @default.
- W2790242495 hasConcept C13481523 @default.
- W2790242495 hasConcept C196216189 @default.
- W2790242495 hasConcept C28855332 @default.
- W2790242495 hasConcept C31972630 @default.
- W2790242495 hasConcept C33923547 @default.
- W2790242495 hasConcept C41008148 @default.
- W2790242495 hasConcept C47432892 @default.
- W2790242495 hasConcept C5317259 @default.
- W2790242495 hasConcept C64185310 @default.
- W2790242495 hasConcept C78548338 @default.
- W2790242495 hasConcept C9417928 @default.
- W2790242495 hasConceptScore W2790242495C105795698 @default.
- W2790242495 hasConceptScore W2790242495C11413529 @default.
- W2790242495 hasConceptScore W2790242495C115961682 @default.
- W2790242495 hasConceptScore W2790242495C118505674 @default.
- W2790242495 hasConceptScore W2790242495C13481523 @default.
- W2790242495 hasConceptScore W2790242495C196216189 @default.
- W2790242495 hasConceptScore W2790242495C28855332 @default.
- W2790242495 hasConceptScore W2790242495C31972630 @default.
- W2790242495 hasConceptScore W2790242495C33923547 @default.
- W2790242495 hasConceptScore W2790242495C41008148 @default.
- W2790242495 hasConceptScore W2790242495C47432892 @default.
- W2790242495 hasConceptScore W2790242495C5317259 @default.
- W2790242495 hasConceptScore W2790242495C64185310 @default.
- W2790242495 hasConceptScore W2790242495C78548338 @default.
- W2790242495 hasConceptScore W2790242495C9417928 @default.
- W2790242495 hasLocation W27902424951 @default.
- W2790242495 hasOpenAccess W2790242495 @default.
- W2790242495 hasPrimaryLocation W27902424951 @default.
- W2790242495 hasRelatedWork W1485039209 @default.
- W2790242495 hasRelatedWork W1533483047 @default.
- W2790242495 hasRelatedWork W1954681367 @default.
- W2790242495 hasRelatedWork W1983955985 @default.
- W2790242495 hasRelatedWork W2011493653 @default.
- W2790242495 hasRelatedWork W2053691921 @default.
- W2790242495 hasRelatedWork W2055411918 @default.
- W2790242495 hasRelatedWork W2090408580 @default.
- W2790242495 hasRelatedWork W2109575004 @default.
- W2790242495 hasRelatedWork W2118065406 @default.
- W2790242495 hasRelatedWork W2141182678 @default.
- W2790242495 hasRelatedWork W2147460385 @default.
- W2790242495 hasRelatedWork W2153428021 @default.
- W2790242495 hasRelatedWork W2164137151 @default.
- W2790242495 hasRelatedWork W2170956466 @default.
- W2790242495 hasRelatedWork W2172265048 @default.
- W2790242495 hasRelatedWork W2359789298 @default.
- W2790242495 hasRelatedWork W2594663371 @default.
- W2790242495 hasRelatedWork W2782521089 @default.
- W2790242495 hasRelatedWork W2782544928 @default.
- W2790242495 isParatext "false" @default.
- W2790242495 isRetracted "false" @default.
- W2790242495 magId "2790242495" @default.
- W2790242495 workType "article" @default.