A method for hierarchical subband HDTV splitting
01 Jun 1995-IEEE Transactions on Circuits and Systems for Video Technology (IEEE)-Vol. 5, Iss: 3, pp 225-230
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. >
Citations
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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
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
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
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
References
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TL;DR: This work applies subband decompisition of HDTV signlas to a sequence and indicates bitrates on the special case of quincunx substampling and derives filter banks to go from processing to interlaced scanning as well as from interlaces to progressive.
Abstract: subband decompisition of HDTV signlas is important both for representation purpose (to create compatible subchannels) and fro coding (several proposed compression schemes include some subband division). We first review perfect reconstruction filter banks in multiple dimensions in the contest of arbitrary sampling patterns. Then we concentrate on the special case of quincunx substampling and derive filter banks to go from processing to interlaced scanning (with a highpass which contains deinterlacing information) as well as from interlaced to progressive. We apply this decompisition to a sequence and indicate bitrates.
84 citations
TL;DR: The paper discusses the application of digital image-processing techniques to broadcast television with the goal of picture quality improvement, and specific algorithms for vertical resolution improvement by display scan conversion and horizontalresolution improvement by three-dimensional signal processing are described.
Abstract: The paper discusses the application of digital image-processing techniques to broadcast television with the goal of picture quality improvement. After defining picture quality targets and levels of system compatibility, a review of techniques is presented. These fall into the categories of achieving a wider picture format, improving vertical and horizontal resolution, and improving accurate color reproduction. Specific algorithms for vertical resolution improvement by display scan conversion and horizontal resolution improvement by three-dimensional signal processing are described. Many other approaches are also summarized and referenced, with a particular emphasis on European work.
22 citations
25 Oct 1988
TL;DR: The efforts to develop improved television systems, particularly for broadcasting and cable use, are described, and two systems under development are presented, a receiver-compatible system suitable for immediate over-the-air applications and a noncompatible (but channel-compatible) scheme suitable for immediately use on cable.
Abstract: We describe the efforts to develop improved television systems, particularly for broadcasting and cable use. Both technical and regulatory issues are discussed. The questions of compatibility with the large number of existing receivers and with current channelization schemes are stressed. The desirable properties of new systems are given, and methods of improvement outlined. Two systems under development are presented, a receiver-compatible system suitable for immediate over-the-air applications, and a noncompatible (but channel-compatible) scheme suitable for immediate use on cable.
4 citations