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Serge Simon

Bio: Serge Simon is an academic researcher from Ghent University. The author has contributed to research in topics: Sub-band coding & Filter bank. The author has an hindex of 1, co-authored 2 publications receiving 5 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a hierarchical method is proposed leading to a more reasonable joint solution for the issues of digital transmission evolution and interlace-to-progressive scanning conversion in the frame work of bit rate compression.
Abstract: An investigation is made on the compatibility of the video formats, standard TV (625/50/2:1/4:3), EDTV (625/50/1:1/16:9), HDTVint (1250/50/2:1/16:9) and HDTVpro (1250/50/1:1/16:9) in three-dimensional subband coding. A hierarchical method is proposed leading to a more reasonable joint solution for the issues of digital transmission evolution and interlace-to-progressive scanning conversion in the frame work of bit rate compression. Conventional HDTVint with the diamond shaped spectrum is proposed to be replaced by a kind of "switching" HDTVint signal which consists of three components and motion detection bits (MDB). The first component and the MDB represent TV. The first plus the second component and the MDB represent EDTV. HDTVpro is split into switching HDTVint and an extra component. The switching threshold and the length of temporal filter banks are discussed. Rearranging the pixels in subbands is recommended. Based on the proposed method, the transmission system can evolve through four steps: TV, EDTV, HDTVint, and HDTVpro. Results of bit rate compression are also presented. TV, EDTV, HDTVint, and HDTVpro are compressed to approximately 40, 80, 128, and 256 Mb/s, respectively. Interlace scanning has drawbacks such as line flicker and line crawling as the eye follows the line structure in the picture. Progressive version switching TV and HDTVint could be reconstructed using one frame memory without the problems of handling temporal-vertical diamond shaped spectra of conventional TV and HDTVint based on one-frame memory algorithm in the receiver. >

4 citations

Proceedings Article
07 Apr 1992
TL;DR: A simple three dimensional sub-band splitting scheme for HDTV is presented, which uses perfect reconstruction and QMF filter banks to split a sequence of frames in the temporal, horizontal and vertical direction.
Abstract: A simple three dimensional sub-band splitting scheme for HDTV is presented. The aim is to compress the interlaced HDTV signal which comes from a bit rate of 880 Mbit/s, down to less than 140 Mbit/s. The scheme uses perfect reconstruction and QMF filter banks to split a sequence of frames in the temporal, horizontal and vertical direction. The temporal high bands contain the motion information. After the filtering, subsampling is used in the spatial as well as in the temporal domain. To the subsampled bands bits are allocated, depending on the activities in those bands. Each band is divided in three different activity zones for which different quantizers are used. The resulting values are VLC coded using arithmetic coding. With this technique, good distribution quality results have been achieved. >

1 citations


Cited by
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Journal ArticleDOI
TL;DR: The proposed MP prediction method clearly outperforms all other conventional approaches and the same motion vectors can be used in both SNR layers, and the DFD prediction between layers improves coding efficiency.
Abstract: In this paper, SNR scalable representations of video signals are studied. The investigated codecs are well suited for communications applications because they are all based on backward motion-compensated predictive coding, which provides the necessary low-delay property. In a very-low bit rate context (VLBR), the matching pursuits (MP) signal representation algorithm is used to represent the displaced frame difference (DFD) of each layer of a multilevel decomposition of the video signal. A number of conventional prediction schemes that can be generalized to any DFD representation technique are considered. They are compared with an original and MP specific DFD prediction method. Two scenari have been considered. In the first scenario, an enhancement layer is built on a base layer that has been encoded using a classical, i.e., nonscalable scheme. In that case, all methods appear to be comparable, In the second scenario, the fact that the base layer is used as a reference for an enhancement layer is taken into account to build it. In that case, the proposed MP prediction method clearly outperforms all other conventional approaches, Additional lessons can be drawn from this work. The same motion vectors can be used in both SNR layers, and the DFD prediction between layers improves coding efficiency. Moreover, the MP representation of the signal enable us to measure the predictability of the high SNR layer DFD from the low SNR layer DFD, i.e., to quantify the part of the low SNR layer information that also belongs to the high SNR layer.

15 citations

Patent
05 Jun 1996
TL;DR: In this article, the authors proposed a temporal weighting technique for logarithmic temporal decimation frame structures, in which one frame within a group of 2n frames is an ''I` frame and the remaining frames are ''B` frames.
Abstract: Decoder reconstruction error is estimated so as to provide compensation at the encoder which equalizes the errors over different frames, since the errors created by some frames are lower than those created by other frames. The compensation is provided by means of temporal weighting applied in the form of temporal bands each associated with specific numbered frames within a frame group. The technique can be applied to a logarithmic temporal decimation frame structure in which one frame within a group of 2n frames is an `I` frame and the remaining frames are `B` frames.

10 citations

Proceedings ArticleDOI
09 Jun 1997
TL;DR: This paper investigates the best permutation strategy for temporal, vertical, and horizontal filtering to minimize the requirement of delay elements and finds that the results are opposite to the authors' expectation.
Abstract: Since three-dimensional (3-D) subband coding has been introduced, most researches on 3-D subband coding perform temporal filtering first. In this paper, we investigate the best permutation strategy for temporal, vertical, and horizontal filtering to minimize the requirement of delay elements and find that the results are opposite to our expectation.

2 citations

Journal ArticleDOI
TL;DR: Numerical analysis and synthesis filter banks for subband image coding of digital video telephone, video conference, television (TV) and high-definition television (HDTV) signals are summarized and designed.

2 citations

Proceedings ArticleDOI
16 Sep 1996
TL;DR: This paper investigates the best permutation strategy for temporal, vertical, and horizontal filtering to minimize the requirement of delay elements and finds that the results are opposite to the authors' expectation.
Abstract: Since three-dimensional (3-D) subband coding has been introduced, most researches on 3-D subband coding perform temporal filtering first. In this paper, however, we investigate the best permutation strategy for temporal, vertical, and horizontal filtering to minimize the requirement of delay elements and find that the results are opposite to our expectation.

1 citations