检索结果-内蒙古大学图书馆

您好，读者！请登录

内蒙古大学图书馆

首页
概况
党建
资源
服务
科研支持
- 论文收录引用证明
- 科技查新
知识产权
档案馆
帮助

咨询与建议

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

您的常用邮箱：*

您的手机号码：*

问题描述：

当前已输入0个字，您还可以输入200个字

全部搜索
期刊论文
图书
学位论文
标准
纸本馆藏
外文资源发现
数据库导航
超星发现

高级检索

时间限定

出版年份：

文献类型

图书期刊文献学位论文多媒体

馆藏选择

电子馆藏纸本馆藏

核心期刊

全部期刊 SCI 收录期刊 SSCI 收录期刊 EI 收录期刊 CSCD 收录期刊 CSSCI 收录期刊

语言

中文英文

文献类型

期刊文献图书学位论文标准纸本馆藏

帮助

文字说明：

T=题名（书名、题名），A=作者（责任者），K=主题词，P=出版物名称，PU=出版社名称，O=机构（作者单位、学位授予单位、专利申请人），L=中图分类号，C=学科分类号，U=全部字段，Y=年（出版发行年、学位年度、标准发布年）

检索规则说明：

AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：

范例一：(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二：P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016

分类表

所选分类

>> <<

限定检索结果

文献类型

1,428 篇 会议
354 篇 期刊文献
5 篇 学位论文
2 册 图书

馆藏范围

1,789 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

757 篇 工学
- 427 篇 计算机科学与技术...
- 423 篇 电气工程
- 264 篇 信息与通信工程
- 143 篇 软件工程
- 71 篇 电子科学与技术（可...
- 26 篇 仪器科学与技术
- 21 篇 机械工程
- 21 篇 控制科学与工程
- 8 篇 光学工程
- 8 篇 交通运输工程
- 6 篇 网络空间安全
- 3 篇 建筑学
- 3 篇 土木工程
- 3 篇 环境科学与工程（可...
- 3 篇 生物医学工程（可授...
145 篇 医学
- 142 篇 临床医学
- 7 篇 特种医学
- 6 篇 基础医学(可授医学...
53 篇 理学
- 34 篇 物理学
- 8 篇 数学
- 7 篇 系统科学
- 4 篇 生物学
45 篇 管理学
- 40 篇 管理科学与工程(可...
- 3 篇 图书情报与档案管...
26 篇 教育学
- 20 篇 心理学(可授教育学...
- 9 篇 教育学
17 篇 文学
- 7 篇 外国语言文学
- 7 篇 新闻传播学
12 篇 法学
- 8 篇 社会学
7 篇 艺术学
3 篇 军事学
- 3 篇 军队指挥学
2 篇 哲学
2 篇 经济学
1 篇 历史学

主题

1,789 篇 transcoding
539 篇 streaming media
319 篇 decoding
280 篇 bit rate
235 篇 video compressio...
229 篇 bandwidth
217 篇 video coding
167 篇 discrete cosine ...
144 篇 transform coding
108 篇 automatic voltag...
101 篇 motion estimatio...
96 篇 computational co...
96 篇 encoding
93 篇 quantization
89 篇 servers
89 篇 image coding
85 篇 spatial resoluti...
85 篇 internet
77 篇 scalability
77 篇 network servers

机构

17 篇 school of electr...
12 篇 microsoft resear...
10 篇 centre for multi...
9 篇 hewlett packard ...
8 篇 tianjin univ sch...
8 篇 santa clara univ...
8 篇 mitsubishi elect...
8 篇 university of sc...
7 篇 institute for in...
7 篇 school of electr...
6 篇 ibm thomas j. wa...
6 篇 univ ghent ibbt ...
6 篇 florida atlantic...
6 篇 beijing univ pos...
6 篇 univ castilla la...
6 篇 albacete researc...
6 篇 institute of com...
6 篇 department of co...
5 篇 faculty of softw...
5 篇 tsinghua univ de...

作者

24 篇 de cock jan
23 篇 van de walle rik
20 篇 jan de cock
19 篇 rik van de walle
19 篇 wan-chi siu
15 篇 notebaert stijn
14 篇 lambert peter
13 篇 a. vetro
12 篇 cuenca pedro
12 篇 stijn notebaert
12 篇 yap-peng tan
12 篇 kai-tat fung
11 篇 panos nasiopoulo...
10 篇 yui-lam chan
10 篇 y. shibata
10 篇 shipeng li
10 篇 cuenca p.
9 篇 luis martinez jo...
9 篇 chia-wen lin
9 篇 lap-pui chau

语言

1,757 篇 英文
17 篇 中文
13 篇 其他
1 篇 德文
1 篇 西班牙文

检索条件"主题词=Transcoding"

共 1789 条记录，以下是1611-1620 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

QOS Control of multimedia communication over wireless network 22

QOS Control of multimedia communication over wireless networ...

引用

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

ISBN: (纸本)0769515886

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 Correction) method with Reed-Solomon coding is introduced to reduce the packet error rate on the wireless network. On the other hand, as source coding, transcoding methods including transformation of various video codings such as M-JPEG, MPEG and Quicktime, controls of Q-factor within a frame, frame rate and color depth is introduced to maintain the required QOS, particularly the end-to-end throughput. The increases of the required bandwidth by redundant packet addition with FEC can be suppressed by the transcoding functions while the packet error rate is reduced to the accepted value. In order to verify the functionality and the efficiency in our suggested system, numerical simulation was held. As the result, out suggested system by combination of transcoding and FEC could correct the packet error rate with an order of 10(9) while maintaining the frame rate and the amount of data transform at a constant.

关键词： QOS control multimedia communication transcoding wireless network

来源：评论

学校读者我要写书评

暂无评论

Framerate optimization under a bitrate constraint

Framerate optimization under a bitrate constraint

引用

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

ISBN: (纸本)0819444111

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), one of or either of these should be reduced in transcoding. In addition, because there is a tradeoff between the BPF and FPS under a bitrate constraint, the BPF and FPS should be optimally determined to get the best subjective video quality. This paper proposes a framerate optimization method, which estimates an optimal framerate directly from a target video and a specified bitrate. Actually, an optimal framerate is derived by using a characteristic surface of Mean Opinion Score(MOS), which is estimated by suitable features of a target video. Comparison of the optimal framerate obtained by the actual measurement with one by the proposed technique has proved that the accuracy of estimation by the proposed technique is satisfactory for several open data sequences.

关键词： optimal framerate subjective assessment test transcoding rate control

来源：评论

学校读者我要写书评

暂无评论

transcoding of video into different encoding formats

Transcoding of video into different encoding formats

引用

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 of candidate motion vectors, from the incoming bit stream, to comply with the encoding format of the output bit stream. For the spatial resolution reduction, we generate one motion vector out of a set of input motion vectors operating on the higher spatial resolution image. We discuss the impact of motion estimation refinement on the new motion vectors and show that for all cases a simple half-pixel refinement is sufficient for near-optimum results.

关键词： transcoding Encoding Spatial resolution Bit rate Video compression Streaming media Decoding Motion estimation Quality of service Nonhomogeneous media

来源：评论

学校读者我要写书评

暂无评论

Parameter estimation for image/video transcoding

Parameter estimation for image/video transcoding

引用

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 is critical in the image or video transcoding system. Therefore, the parameter in the distribution should be well estimated. Different from the normal parameter estimation, in the transcoding system, the original DCT value is unavailable, and only the dequantized value is available. In this paper, we propose 3 estimation methods based on the dequantized value for the transcoding system. The simulation demonstrates that they can yield very good results. In addition, under a fixed bit rate, they can work even better than estimation with the original DCT value in the sense of image/frame's PSNR.

关键词： Parameter estimation transcoding Discrete cosine transforms Bit rate Frequency Decoding Gold Image coding Transform coding Laplace equations

来源：评论

学校读者我要写书评

暂无评论

A low-complexity MPEG-2 bit-rate transcoding algorithm

A low-complexity MPEG-2 bit-rate transcoding algorithm

引用

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 algorithm it is especially applicable in DSP/CPU software solutions or in consumer applications that require high throughput.

关键词： transcoding Decoding Transform coding High definition video Digital recording Hardware Error compensation Software algorithms Application software Throughput

来源：评论

学校读者我要写书评

暂无评论

Fast video transcoding architectures for networked multimedia applications

Fast video transcoding architectures for networked multimedi...

引用

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

ISBN: (纸本)0780354826

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 incoming bit-stream and then re-encodes the decoded pictures with the desired bit-rate or format. However, the cascaded pixel-domain transcoder is computationally expensive. To reduce the computations, several fast architectures have been proposed in the literature. However, these fast transcoder architectures introduce new limitations and are not drift-free. In this paper, we propose new techniques to implement a fast cascaded pixel-domain transcoder. We further discuss the limitation and speed of the different transcoder architectures. We also discuss the methods for adding watermark or company logo, using the different transcoder architectures.

关键词： transcoding Decoding Computer architecture Watermarking Video compression Sun Discrete cosine transforms Motion compensation Information processing Laboratories

来源：评论

学校读者我要写书评

暂无评论

Estimating Laplacian parameters of DCT coefficients for requantization in the transcoding of MPEG-2 video

Estimating Laplacian parameters of DCT coefficients for requ...

引用

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

ISBN: (纸本)0780362977

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 coefficients of the DCT. A Laplacian parameter for each coefficient is estimated at the transcoder from the quantized input DCT coefficients. These parameters are then used in requantization to improve the quality of the transcoded video. The algorithm provided in this paper to estimate the Laplacian parameters of the original DCT coefficients is simple to implement and may be adapted to other DCT-based coding schemes.

关键词： Parameter estimation Laplace equations Discrete cosine transforms transcoding Video compression Transform coding Bit rate Signal processing algorithms Delay Cost function

来源：评论

学校读者我要写书评

暂无评论

Object-based transcoding for scalable quality of service

Object-based transcoding for scalable quality of service

引用

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

关键词： transcoding Quality of service MPEG 4 Standard Shape control Sun Laboratories Scalability Ear Video signal processing Robustness

来源：评论

学校读者我要写书评

暂无评论

Video transcoding by reducing spatial resolution

Video transcoding by reducing spatial resolution

引用

IEEE International Conference on Image Processing

作者： Peng Yin Min Wu Bede Liu Department of Electrical Engineering Princeton University Princeton NJ USA

ISBN: (纸本)0780362977

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 while maintaining reasonable image quality. In this paper, we propose a fast approach to derive from an MPEG stream a new MPEG stream with half the spatial resolution. For the downsized video, we first generate from the original compressed video an improved estimate of the motion vectors. We then propose a compressed domain approach with data hiding to produce DCT residues by an open-loop method. The computational complexity is significantly lower than a number of previous approaches. Simulation suggests that our approach produces reasonable image quality.

关键词： transcoding Spatial resolution Image quality Transform coding Streaming media Video compression Image coding Bandwidth Bit rate Motion estimation

来源：评论

学校读者我要写书评

暂无评论

Rationality of restricted re-quantization for efficient MPEG transcoding

Rationality of restricted re-quantization for efficient MPEG...

引用

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

ISBN: (纸本)0780362977

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 larger than the original input quantization parameter but smaller than twice the original causes significant information loss in transcoding. This problem can be avoided by using a parameter larger than twice the original. The optimization method was thus extended based on a rate-distortion model to enable the re-quantization parameter to be selected from ones larger than twice the original input quantization range. This improved method outperformed a typical non-optimized transcoding scheme, improving the PSNR by about 1 dB.

关键词： transcoding Quantization Degradation Quadratic programming Streaming media Decoding Discrete cosine transforms Optimization methods PSNR Information analysis

来源：评论

学校读者我要写书评

暂无评论

没有更多数据了...

全选清除本页清除全部题录导出标记到“检索档案”

共179页 << < 158 159 160 161 162 163 164 165 166 167 > >>

检索报告对象比较合并检索0

隐藏清空

合并搜索

回到顶部

执行限定条件

内容：

评分：

请选择保存的检索档案：

请选择收藏分类：

订阅名称：

通借通还

温馨提示：

图书名称：

借书校区：

取书校区：

手机号码：

邮箱地址：

一卡通帐号：

电话和邮箱必须正确填写，我们会与您联系确认。

联系人：

所在院系：

联系邮箱：

联系电话：

内蒙古自治区呼和浩特市赛罕区大学西街235号邮编: 010021

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：