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检索条件"主题词=Transcoding"
1789 条 记 录,以下是1611-1620 订阅
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QOS Control of multimedia communication over wireless network  22
QOS Control of multimedia communication over wireless networ...
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22nd International Conference on Distributed Computing Systems
作者: Takahata, K Uchida, N Shibata, Y Iwate Prefectural Univ Fac Software & Informat Sci Takizawa Iwate 0200193 Japan
In this paper, QOS Control of realtime multimedia communication system under heterogeneous environment by the wired and the wireless networks is proposed. In our suggested system, as channel coding, FEC (forward Error... 详细信息
来源: 评论
Framerate optimization under a bitrate constraint
Framerate optimization under a bitrate constraint
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Conference on Visual Communications and Image Processing 2002
作者: Inazumi, Y Yoshida, T Sakai, Y Horita, Y Tokyo Inst Technol Dept Commun & Integratred Syst Meguro Ku Tokyo 1528552 Japan
Video transmission on the Internet often requires a transcoding in order for the bitrate to meet the available bandwidth. Since the bitrate of videos is determined by an amount of bits per frame(BPF) and framerate(FPS... 详细信息
来源: 评论
transcoding of video into different encoding formats
Transcoding of video into different encoding formats
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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
作者: T. Shanableh M. Ghanbari Department of Electronic Systems Engineering University of Essex UK
In this paper, transcoding of pre-encoded MPEG-1,2 video into lower bit rates is realized through altering the coding algorithm into H.261/H.263 standards with lower spatial resolutions. We extract and compose a set o... 详细信息
来源: 评论
Parameter estimation for image/video transcoding
Parameter estimation for image/video transcoding
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IEEE International Symposium on Circuits and Systems (ISCAS)
作者: Z. Guo O.C. Au K.B. Letaief Dept. of Electr. & Electron. Eng. Hong Kong Univ. of Sci. & Technol. Kowloon China The Department of Electrical & Electronic Engineering Hong Kong University of Science and Technology Kowloon Hong Kong China
In most of the current image/video compression standard, such as JPEG, MPEG, H.263, etc, the DCT is used. The DCT coefficients for every AC frequency component usually have Laplacian distribution. Such a distribution ... 详细信息
来源: 评论
A low-complexity MPEG-2 bit-rate transcoding algorithm
A low-complexity MPEG-2 bit-rate transcoding algorithm
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IEEE International Conference on Consumer Electronics (ICCE)
作者: R.K. Gunnewiek W.H.A. Brul M. Holl Philips Research Eindhoven North Brabant NL
This paper describes a low complexity MPEG-2 bitrate transcoding algorithm that achieves an extra compression factor of about two without introducing annoying coding artefacts. Due to the low complexity of this algori... 详细信息
来源: 评论
Fast video transcoding architectures for networked multimedia applications
Fast video transcoding architectures for networked multimedi...
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IEEE International Symposium on Circuits and Systems (ISCAS)
作者: Jeongnam Youn Jun Xin Ming-Ting Sun Information Processing Laboratory Department of Electrical Engineering University of Washington Seattle WA USA
In various networked multimedia applications, it is often necessary to change the bit-rate and format of a pre-encoded bit-stream. This can be achieved using a cascaded pixel-domain transcoder, which fully decodes an ... 详细信息
来源: 评论
Estimating Laplacian parameters of DCT coefficients for requantization in the transcoding of MPEG-2 video
Estimating Laplacian parameters of DCT coefficients for requ...
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IEEE International Conference on Image Processing
作者: H. Sorial W.E. Lynch A. Vincent Centre for Signal Processing and Communications Department of Electrical & Computer Engineering Concordia University Montreal QUE Canada Communications Rcscarch Centre Ottawa ONT Canada
This paper addresses the bit-rate reduction of MPEG-2 compressed video and presents a method to reduce requantization errors in transcoding. The proposed method assumes Laplacian distributions for the original AC coef... 详细信息
来源: 评论
Object-based transcoding for scalable quality of service
Object-based transcoding for scalable quality of service
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IEEE International Symposium on Circuits and Systems (ISCAS)
作者: A. Vetro Huifang Sun Yao Wang Advanced Television Laboratory Mitsubishi Electric ITA New Providence NJ USA Department of Electrical Engineering Polytechnic University Brooklyn NY USA
In this paper, we focus on the methods for delivering object-based video data. More specifically, me exploit the fact that a finer level of scalability can be achieved when the video frame has been decomposed into obj... 详细信息
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Video transcoding by reducing spatial resolution
Video transcoding by reducing spatial resolution
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IEEE International Conference on Image Processing
作者: Peng Yin Min Wu Bede Liu Department of Electrical Engineering Princeton University Princeton NJ USA
In network delivery of digital video, if the bandwidth required for a video is not available, the video has to be recoded at a reduced bit rate. It is highly desirable that the transcoding is carried out in real time ... 详细信息
来源: 评论
Rationality of restricted re-quantization for efficient MPEG transcoding
Rationality of restricted re-quantization for efficient MPEG...
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IEEE International Conference on Image Processing
作者: S. Kadono M. Etoh N. Yokoya Matsushita Elecrric Indusrrial Company Limited Kadoma Japan Nara Institute of Science and Technology Ikoma Japan NTT DoCoMo Inc. Yokosuka Japan
A macroblock-based optimization method is described for selecting quantization parameters so as to reduce the re-quantization errors in MPEG transcoding. Analysis has shown that re-quantization using a parameter large... 详细信息
来源: 评论