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1st IEEE Workshop on Multimedia Signal Processing, MMSP 1997

作者： Chiang, Tihao Lee, Hung-Ju Pejhan, Sassan Sodagar, Iraj Zhang, Ya-Qin Sarnoff Corporations PrincetonNJ United States

ISBN: (纸本)0780337808

In this demonstration session, we will demonstrate several examples of the state-of-the-art video compression standards MPEG-2, MPEG-4 and H.263. These demonstrations captured some of the recent work developed in the digital video Communications group at Sarnoff. For the MPEG-2 demonstration, the compression process uses standards compliant syntax with Sarnoff's proprietary algorithms to select the encoding parameters. For the MPEG-4 demonstration, we show the encoding results of the Verification Model including Sarnoff's contribution in scalable rate control and texture coding mode. In addition, we show the encoding results of a video streaming technology using H.263 and Sarnoff's proprietary technologies. © 1997 IEEE.

关键词： Motion Picture Experts Group standards

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Multimedia architectures: From desktop systems to portable appliances

Multimedia architectures: From desktop systems to portable a...

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Conference on Multimedia Hardware Architectures 1997

作者： Bhaskaran, V Konstantinides, K Natarajan, B Hewlett-Packard Labs. (United States)

ISBN: (纸本)0819424323

Future desktop and portable computing systems will have as their core an integrated multimedia system. Such a system will seamlessly combine digital video, digital audio, computer animation, text, and graphics. Furthermore, such a system will allow for mixed-media creation, dissemination, and interactive access in real time. Multimedia architectures that need to support these functions have traditionally required special display and processing units for the different media types. This approach tends to be expensive and is inefficient in its use of silicon. Furthermore, such media-specific processing units are unable to cope with the fluid nature of the multimedia market wherein the needs and standards are changing and system manufacturers may demand a single component media engine across a range of products. This constraint has led tot a shift towards providing a single-component multimedia specific computing engine that can be integrated easily within desktop systems, tethered consumer appliances, or portable appliances. In this paper, we review some of the recent architectural efforts in developing integrated media systems. We primarily focus on two efforts, namely the evolution of multimedia-capable general purpose processors and a more recent effort in developing single component mixed media cc-processors. Design considerations that could facilitate the migration of these technologies to a portable integrated media system will also be presented.

关键词： compression low-power co-processors standards

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Comparisons of linear and nonlinear pyramid schemes for signal and image processing 8

Comparisons of linear and nonlinear pyramid schemes for sign...

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Conference on Nonlinear Image Processing VIII

作者： Morales, A Ko, SS KOREA UNIV DEPT ELECT ENGNSEOUL 136701SOUTH KOREA

ISBN: (纸本)0819424374

Linear filters banks are being used extensively in image and video applications. New research results in wavelet applications for compression and de-noising are constantly appearing in the technical literature. On the other hand, non-linear filter banks are also being used regularly in image pyramid algorithms. There are some inherent advantages in using non-linear filters [1] instead of linear filters when non-Gaussian processes are present in images. However, a consistent way of comparing performance criteria between these two schemes has not been fully developed yet. In this paper a recently discovered tool, sample selection probabilities [16], is used to compare the behavior of linear and non-linear filters. In [16] the conversion from weights of order statistics (OS) filters to coefficients of the impulse response is obtained through these probabilities, However, the reverse problem: the conversion from coefficients of the impulse response to the weights of OS filters is not yet fully understood. One of the reasons for this difficulty is the highly non-linear nature of the partitions and generating function used in [16]. In the present paper the problem is posed as an optimization of integer linear programming subject to constraints directly obtained from the coefficients of the impulse response. Although the technique to be presented is not completely refined, it certainly appears to be promising. Some results will be shown.

关键词： Nonlinear filtering digital filtering Linear filtering Image processing Computer programming Lithium Image filtering Nonlinear image processing Nonlinear optics Signal processing

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digital compression technologies and Systems for video Communications

Digital Compression Technologies and Systems for Video Commu...

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digital compression technologies and Systems for video Communications

ISBN: (纸本)0819423564

The proceedings contains 71 papers. Following topics are discussed: video coding;pre- and postprocessing;image/video coding and processing;video transmission;medical and very high quality images;object-based motion compensation;motion estimation and compensation;MPEG-2 optimization and applications;image compression;optimization, implementation, and applications of codecs;and fractal-based coding.

关键词： video signal processing

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Emerging video compression technologies

Emerging video compression technologies

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digital video compression - algorithms and technologies 1996 Conference

作者： Zakhor, A UNIV CALIF BERKELEY BERKELEYCA 94720

In this talk, I will describe two aspects of video compression algorithms: the first area has to do with very low bit rate video coding, and the second one with scalable video compression.

ISBN: (纸本)0819420425

In this talk, I will describe two aspects of video compression algorithms: the first area has to do with very low bit rate video coding, and the second one with scalable video compression.

关键词： video compression video video coding Low bit rate video 3D video compression Algorithm development Visualization Wireless communications

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video compression for digital television applications

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PHILIPS JOURNAL OF RESEARCH 1996年第1-2期50卷 5-19页

作者： Challapali, K Nocture, G LABS ELECTR PHILIPS F-94453 LIMEIL BREVANNESFRANCE

Developments in video compression and VLSI technologies are producing revolutionary changes in the television industry. Television signals worldwide are beginning to be compressed, encoded and transmitted using digital means. Using digital compression, encoding and transmission techniques has the advantage of better bandwidth utilization, flexibility and ease of integration with other digital data, and an overall higher quality of video at the receiver. The purpose of this paper is two-fold. Firstly, an introduction to video compression in the context of emerging digital television standards is provided. The important role played by International Standards, specifically MPEG, in the development of digital television systems is discussed. Secondly, current trends in the use of compression in the development of digital television for deployment in the United States and Europe, and the participation of Philips in these new applications, are discussed.

关键词： digital television video compression MPEG-based applications digital video coding advanced television standards

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Spatial scalability in compressed domain

Spatial scalability in compressed domain

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digital video compression - algorithms and technologies 1996 Conference

作者： Hu, Q Panchanathan, S UNIV OTTAWA DEPT ELECT ENGNVISUAL COMP & COMMUN LABOTTAWAON K1N 6N5CANADA

ISBN: (纸本)0819420425

The large quantity of data associated with visual information necessitates the use of compression techniques. In this paper, we propose a novel approach (compressed domain technique) to implement spatial scalability directly on the compressed image/video data. In contrast to the spatial domain technique (baseline for comparison), the proposed technique removes the unnecessary decompression and re-compression procedures. The computational complexity is greatly reduced by using certain approximations. We note that depending on the image/video content, only marginal quality degradation (almost unnoticeable subjectively) may be introduced. Simulation results confirm the substantial reductions in computational complexity of the proposed technique at a comparable performance to the spatial domain technique.

关键词： spatial scalability video compression DCT domain computational complexity

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High performance software-only H.261 video compression on PC

High performance software-only H.261 video compression on PC

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digital video compression - algorithms and technologies 1996 Conference

作者： Kasperovich, L INST INFORMAT TECHNOL SINGAPORE 0511SINGAPORE

ISBN: (纸本)0819420425

This paper describes an implementation of a software H.261 codec for PC, that takes an advantage of the fast computational algorithms for DCT-based video compression, which have been presented by the author at the February's 1995 SPIE/IS&T meeting. The motivation for developing the H.261 prototype system is to demonstrate a feasibility of real time software- only videoconferencing solution to operate across a wide range of network bandwidth, frame rate, and resolution of the input video. As the bandwidths of current network technology will be increased, the higher frame rate and resolution of video to be transmitted is allowed, that requires, in turn, a software codec to be able to compress pictures of CIF (352 X 288) resolution at up to 30 frame/sec. Running on Pentium 133 MHz PC the codec presented is capable to compress video in CIF format at 21 - 23 frame/sec. This result is comparable to the known hardware-based H.261 solutions, but it doesn't require any specific hardware. The methods to achieve high performance, the program optimization technique for Pentium microprocessor along with the performance profile, showing the actual contribution of the different encoding/decoding stages to the overall computational process, are presented.

关键词： video compression real-time processing software-only solution H.261

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VLSI chip-set for affine based video compression

VLSI chip-set for affine based video compression

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digital video compression - algorithms and technologies 1996 Conference

作者： Fatemi, O Panchanathan, S UNIV OTTAWA DEPT ELECT ENGNVISUAL COMP & COMMUN LABOTTAWAON K1N 6N5CANADA

ISBN: (纸本)0819420425

A crucial operation in image and video processing applications is affine transforms. Typical applications of affine transforms include fractal block coding, camera operation detection, affine motion estimation, etc. Affine transforms involve complex operations and are hence difficult to implement in real-time. In this paper, we present a novel architecture for real-time implementation of affine transforms. First, we derive two fundamental operations from affine transforms and then propose an efficient method of implementing these operations. As an example of the application of ATP (Affine Transform Processor), we propose a high performance video compression algorithm mapped onto the proposed architecture. This algorithm is based on combined affine transform and vector quantization (ATVQ), where the infra-frame and inter-frame redundancy in the video sequence are exploited through piecewise self-similarity on a block-wise basis within a frame and between frames. ATVQ has the advantages of superior coding performance at a significantly reduced computational complexity. ATVQ has been mapped onto the ATP and real-time execution is demonstrated using a VHDL (VHSIC Hardware Description Language) implementation of ATP.

关键词： VLSI implementation low bitrate video coding VHDL affine transforms and vector quantization

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Visual pattern-based motion estimation for video coding

Visual pattern-based motion estimation for video coding

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digital video compression - algorithms and technologies 1996 Conference

作者： Zhong, S Chin, F UNIV HONG KONG DEPT COMP SCIHONG KONGHONG KONG

ISBN: (纸本)0819420425

Block matching algorithms (BMAs) are often employed for motion estimation (ME) in video coding. Most conventional BMAs treat the ME problem as an optimization problem and employ certain search schemes to find a solution. Except the time-consuming full search algorithms (FS), other fast algorithms such as the three step search (TSS), searching on a reduced search range, cannot guarantee optimal solutions, i.e., search is often trapped at local minima; the ME results are thus usually unsatisfactory. Few of them makes use of the information inherent in the images explicitly. We propose a new ME algorithm which can reduce the search range while guaranteeing global optimality in most cases. Microblock visual patterns are designed to extract edge information to guide block matching: searching is only carried out at places where the real match most likely happens; that is where similar edge features present. The proposed algorithm obtains a speed about 7 - 8 times as fast as that of FS with same search range. The prediction quality is very close to that of FS and much better than that of TSS. It can produce MPEG-1 or MPEG-2 compatible motion vectors, and can be extended to model-based ME. It is suitable for parallel implementation too. Moreover, the visual patterns are potential resources for video indexing to facilitate content-based information retrieval, which is important for applications such as VOD.

关键词： video compression motion estimation MPEG edge pattern visual feature

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