The proceedings contains 43 papers. Following topics are discussed: low-bit-rate video coding;compressed domain processing;wavelet coding;MPEG;hardware implementation;motion estimation and compensation;video transmiss...
详细信息
ISBN:
(纸本)0819420425
The proceedings contains 43 papers. Following topics are discussed: low-bit-rate video coding;compressed domain processing;wavelet coding;MPEG;hardware implementation;motion estimation and compensation;video transmission over broadband networks;and video coding.
In this talk, I will describe two aspects of videocompressionalgorithms: the first area has to do with very low bit rate video coding, and the second one with scalable videocompression.
ISBN:
(纸本)0819420425
In this talk, I will describe two aspects of videocompressionalgorithms: the first area has to do with very low bit rate video coding, and the second one with scalable videocompression.
In this paper we describe a low cost approach to the compression of sequences of video images. The target application of this algorithm is video conferencing.
ISBN:
(纸本)0819414824
In this paper we describe a low cost approach to the compression of sequences of video images. The target application of this algorithm is video conferencing.
In this paper we review the Split-Merge video displacement estimation technique and show how this can be used, given a classification with integer labels of the objects in the first frame of a video sequence, to track...
详细信息
ISBN:
(纸本)0819417661
In this paper we review the Split-Merge video displacement estimation technique and show how this can be used, given a classification with integer labels of the objects in the first frame of a video sequence, to track this classification along the sequence while doing motion estimation.
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 d...
详细信息
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.
Since motion compensation is computationally expensive the search for matching blocks is restricted to a small region. In this paper an algorithm for searching all blocks in all previous frames in practical time is de...
详细信息
ISBN:
(纸本)0819414824
Since motion compensation is computationally expensive the search for matching blocks is restricted to a small region. In this paper an algorithm for searching all blocks in all previous frames in practical time is described.
This paper presents a new method, called Spatial Dynamic Motion Compensation (SDMC), which applies the concept of global motion to the coding of motion trajectory information for the purpose of side information reduct...
详细信息
ISBN:
(纸本)0819417661
This paper presents a new method, called Spatial Dynamic Motion Compensation (SDMC), which applies the concept of global motion to the coding of motion trajectory information for the purpose of side information reduction in digitalvideo signal compression. The experimental results of the SDMC algorithms presented in this paper have shown that the new method yields significant improvements in terms of bit rate reduction of motion information over the method used in MPEG-1, while maintaining a comparable reconstructed picture quality, when the video sequences possess significant global translational motion.
In this research, we propose a novel low bit rate videocompression scheme that consists of three major components: hybrid wavelet-JPEG compression, feature-preserving compression via multizone decomposition and windo...
详细信息
ISBN:
(纸本)0819417661
In this research, we propose a novel low bit rate videocompression scheme that consists of three major components: hybrid wavelet-JPEG compression, feature-preserving compression via multizone decomposition and window selection and tracking.
JPEG picture compression and related algorithms are not only used in still picture compression, but also to a growing degree for moving picture compression in telecommunication applications. Real-time JPEG compression...
详细信息
ISBN:
(纸本)0819417661
JPEG picture compression and related algorithms are not only used in still picture compression, but also to a growing degree for moving picture compression in telecommunication applications. Real-time JPEG compression and decompression are crucial in these scenarios. We present a method to significantly improve the performance of software based JPEG decompression. Key to these performance gains are adequate knowledge of the structure of the JPEG coded picture information and transfer of structural information between consecutive processing steps. Our implementation achieved an 80% performance increase decompressing typical JPEG video streams.
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 videocompression, which have been presented by the author at the Feb...
详细信息
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 videocompression, 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.
暂无评论