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

939 篇 会议
253 篇 期刊文献
3 篇 学位论文

馆藏范围

1,195 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

604 篇 工学
- 425 篇 电气工程
- 185 篇 信息与通信工程
- 172 篇 计算机科学与技术...
- 70 篇 电子科学与技术（可...
- 60 篇 软件工程
- 19 篇 仪器科学与技术
- 18 篇 控制科学与工程
- 17 篇 生物医学工程（可授...
- 8 篇 船舶与海洋工程
- 6 篇 机械工程
- 2 篇 力学（可授工学、理...
- 2 篇 材料科学与工程（可...
- 2 篇 测绘科学与技术
- 1 篇 光学工程
- 1 篇 动力工程及工程热...
- 1 篇 石油与天然气工程
211 篇 理学
- 189 篇 物理学
- 18 篇 系统科学
- 15 篇 生物学
- 4 篇 数学
- 1 篇 化学
- 1 篇 科学技术史(分学科...
64 篇 医学
- 62 篇 临床医学
- 15 篇 特种医学
- 3 篇 基础医学(可授医学...
15 篇 管理学
- 15 篇 管理科学与工程(可...
6 篇 军事学
- 6 篇 军队指挥学
4 篇 艺术学
- 4 篇 音乐与舞蹈学
3 篇 文学
- 2 篇 新闻传播学
1 篇 教育学
- 1 篇 教育学

主题

1,195 篇 audio coding
260 篇 bit rate
189 篇 decoding
174 篇 speech coding
151 篇 quantization
144 篇 transform coding
138 篇 codecs
102 篇 frequency
90 篇 mpeg 4 standard
87 篇 filter bank
80 篇 psychoacoustic m...
77 篇 bandwidth
71 篇 audio compressio...
70 篇 encoding
68 篇 signal processin...
68 篇 discrete cosine ...
56 篇 humans
56 篇 testing
56 篇 streaming media
54 篇 auditory system

机构

19 篇 fraunhofer iis e...
11 篇 institute for in...
9 篇 int audio labs e...
9 篇 dolby sweden ab ...
8 篇 fraunhofer insti...
7 篇 univ calif santa...
7 篇 department of me...
6 篇 philips research...
6 篇 department of el...
6 篇 department of el...
6 篇 fraunhofer insti...
6 篇 department of el...
6 篇 department of el...
6 篇 nokia research c...
5 篇 microsoft corp r...
5 篇 electrical engin...
5 篇 international au...
5 篇 international au...
4 篇 zte corporation
4 篇 huawei technolog...

作者

17 篇 t. moriya
15 篇 ruimin hu
15 篇 tsung-han tsai
15 篇 g. schuller
14 篇 susanto rahardja
12 篇 edler bernd
10 篇 r. geiger
10 篇 te li
9 篇 villemoes lars
9 篇 w. bastiaan klei...
9 篇 r. heusdens
9 篇 s. rahardja
9 篇 j. herre
9 篇 beack seungkwon
9 篇 k. brandenburg
8 篇 x. lin
8 篇 hu ruimin
8 篇 r. vafin
8 篇 a. jin
8 篇 helmrich christi...

语言

1,139 篇 英文
51 篇 其他
4 篇 中文
1 篇 斯洛伐克文

检索条件"主题词=Audio coding"

共 1195 条记录，以下是521-530 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：

Phase Randomization-A new concept in Perceptual audio coding

Phase Randomization-A new concept in Perceptual Audio Coding

引用

IEEE Region 10 International Conference TENCON

作者： Muhammad Tayyab Ali Muhammad Saleem Mian Department of Electrical Engineering University of Engineering and Technology Lahore Pakistan

A novel technique of phase randomization (PR) for bit rate reduction in perceptual coding of high quality audio is presented. Instead of actual phase information, the decoder utilizes nevertheless-carefully-formulated 'random' phase information for signal reconstruction with the help of a code sent by the encoder in every frame of data. The coding scheme is tested on the digital audio broadcasting (DAB) standard, for which broadcasters often desire an increase in the number of transmission channels for densely populated areas. The codec achieves the aim of providing good quality audio at a reduced bit rate assessed with the help of lTU-R BS.1116 methodology for the subjective assessment of audio quality

关键词： audio coding Codecs Bit rate Decoding Bandwidth Digital audio broadcasting Testing Switches Humans Ear

来源：评论

学校读者我要写书评

暂无评论

Multichannel Matching Pursuit and Applications to Spatial audio coding

Multichannel Matching Pursuit and Applications to Spatial Au...

引用

Asilomar Conference on Signals, Systems & Computers

作者： Michael M. Goodwin Creative Advanced Technology Center Scotts Valley CA USA

Sparse signal modeling has been considered widely in the literature. In this paper, we discuss an extension of the matching pursuit sparse modeling algorithm to the case of simultaneously approximating multiple data signals; we outline the algorithm for general and for sinusoidal dictionaries. We then apply multichannel sinusoidal pursuit (M-SP) to spatial audio coding (SAC). In most SAC schemes, multichannel audio is coded by forming a downmix signal, compressing the down- mix with a legacy coder, and adding side information about spatial properties of the input audio. In the proposed M-SP system, a multichannel model of the input is used to derive the spatial information as well as a parametric model of an appropriate downmix signal. This joint spatial-parametric approach provides a different multichannel audio coding paradigm than that of previously described SAC methods.

关键词： Matching pursuit algorithms audio coding Dictionaries Pursuit algorithms Algorithm design and analysis Brain modeling Parametric statistics Approximation algorithms Frequency Signal analysis

来源：评论

学校读者我要写书评

暂无评论

Different Quantisation Noise Shaping Methods for Predictive audio coding

Different Quantisation Noise Shaping Methods for Predictive ...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： S. Wabnik G. Schuller J. Hirschfeld U. Kraemer Fraunhofer Institute for Digital Media Technology Ilmenau Germany

The paper presents a comparison of a previous and a new approach to shape quantization noise in low bit rate predictive audio coding. The previous approach uses an adaptation of the step size of a uniform quantizer, the new approach uses a quantizer with clipping. Both approaches are evaluated using a predictive audio coding scheme. The presented results of a listening test show the improved performance of the new approach

关键词： Quantization Noise shaping audio coding Delay Acoustic noise Masking threshold Bit rate Frequency Decoding Testing

来源：评论

学校读者我要写书评

暂无评论

a Family of Random Waveform Models for audio coding

a Family of Random Waveform Models for Audio Coding

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： M. Kowalski B. Torresani LATP CMI Marseilles France

We study the behavior of hybrid random waveform models for audio signals, involving sparse random series of waveforms, with random coefficients. Similar approaches have been considered in the recent years. However, these do generally not rely on explicit models, and are of more "algorithmical" nature. The models we propose allow us to analyze mathematical properties of such signals and corresponding estimators, and derive estimation algorithms, which do not rely on complex optimization techniques

关键词： audio coding Yield estimation Dictionaries Parameter estimation Mathematical model Signal analysis Algorithm design and analysis Random variables Humans Contracts

来源：评论

学校读者我要写书评

暂无评论

A Comparative Study of Lossless audio coding Schemes

A Comparative Study of Lossless Audio Coding Schemes

引用

International Conference on Computer Engineering and Systems

作者： Hend Ali Elsayed Masoud Alghoniemy Mohammed El-Banna Electrical Engineering Department Alexandria University Alexandria Egypt

ISBN: (纸本)1424402719;1424402727

In this paper, we present a comparative study of different lossless audio coding schemes, which are implemented using different integer transforms. The audio signal under consideration, which is assumed to be integer-valued, as in the case of fixed-point implementation, is first decorrelated using the appropriate integer transform. The resulting integer coefficients are then entropy-coded to produce the output stream. Several integer transforms have been considered, such as the integer wavelet transform (IntWT) with different decomposition levels as well as different filters, the integer discrete cosine transform (IntDCT), and the integer Walsh Hadamard transform (IntWHT). Arithmetic and Huffman coding have been used for entropy coding. The performed simulation provides insight on the performance of the different integer transforms in the lossless audio coding context

关键词： audio coding Discrete wavelet transforms Discrete transforms Decorrelation Streaming media Filters Discrete cosine transforms Arithmetic Huffman coding Entropy coding

来源：评论

学校读者我要写书评

暂无评论

ITU-T G.722.1 Annex C: A New Low-Complexity 14 KHZ audio coding Standard

ITU-T G.722.1 Annex C: A New Low-Complexity 14 KHZ Audio Cod...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Minjie Xie D. Lindbergh P. Chu Polycom Inc. Burlington MA USA Polycom Inc. Andover MA USA

This paper describes the low-complexity 14 kHz audio coding algorithm which has been recently standardized by ITU-T as Recommendation G.722.1 Annex C ("G.722.1C"). The algorithm is an extension to ITU-T Recommendation G.722.1 and doubles the G.722.1 algorithm to permit 14 kHz audio bandwidth using a 32 kHz audio sample rate, at 24, 32, and 48 kbit/s. The G.722.1C codec features very high audio quality and extremely low computational complexity compared to other state-of-the-art audio coding algorithms. This codec is suitable for use in video conferencing and teleconferencing, and Internet streaming applications. Subjective test results from the characterization phase of G.722.1 C are also presented in the paper

关键词： audio coding Codecs Videoconference Teleconferencing Bandwidth Testing Wideband Video sharing Speech Computational complexity

来源：评论

学校读者我要写书评

暂无评论

Perceptually-weighted audio coding that scales to extremely low bitrates

Perceptually-weighted audio coding that scales to extremely ...

引用

Data Compression Conference (DCC)

作者： S. Kandadai C.D. Creusere Klipsch New Mexico State University Las Cruces NM USA

A perceptually scalable audio coder generates a bit-stream that contains layers of audio fidelity and is encoded in such a way that adding one of these layers enhances the reconstructed audio by an amount that is just noticeable by the listener. Such algorithms have applications like music on demand at variable levels of fidelity for 3G and 4G cellular radio systems operating at different bit rates. While the MPEG-4 natural audio coder can create scalable bit streams, its perceptual quality at low bit rates is poor. On the other hand, the non scalable TWIN-VQ performs well at low bit rates. In this paper we present a technique to modify the TWIN-VQ algorithm such that it generates a perceptually scalable bit-stream with layers of audio fidelity. Using the TWIN-VQ as our base ensures the best possible perceptual quality at low bit rates (8 - 16 kbps).

关键词： audio coding Bit rate Streaming media MPEG 4 Standard Scalability Channel capacity Psychology Land mobile radio cellular systems Communication channels Digital communication

来源：评论

学校读者我要写书评

暂无评论

Perceptual audio coding Using N-Channel Lattice Vector Quantization

Perceptual Audio Coding Using N-Channel Lattice Vector Quant...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： J. Ostergaard O. Niamut J. Jensen R. Heusdens Information and Communication Theory Group Delft University of Technnology Delft Netherlands

We consider the problem of reliable distribution of audio over packet-switched networks. We make use of multiple-description coding combined with transform coding in order to obtain robustness towards packet losses. Previous approaches to this problem were restricted to the case of only two descriptions. In this work we use n-channel multiple-description lattice vector quantizers (MD-LVQs), which allow for the possibility of using more than two descriptions. For a given packet-loss probability we find the number of descriptions and the bit allocation between transform coefficients which minimizes a perceptual distortion measure subject to an entropy constraint. The optimal quantizers are presented in closed form, thus avoiding any iterative quantizer design procedures. The theoretical results are verified with numerical computer simulations using audio signals and it is shown that in environments with excessive packet losses it is advantageous to use more than two descriptions. We verify in subjective listening tests that using more than two descriptions lead to signals of perceptually higher quality

关键词： audio coding Lattices Vector quantization Distortion measurement Transform coding Robustness Bit rate Entropy Computer simulation Testing

来源：评论

学校读者我要写书评

暂无评论

Computationally Efficient Amplitude Modulated Sinusoidal audio coding Using Frequency-Domain Linear Prediction

Computationally Efficient Amplitude Modulated Sinusoidal Aud...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： M.G. Christensen S.H. Jensen Department of Communication Technology University of Aalborg Denmark

A method for amplitude modulated sinusoidal audio coding is presented that has low complexity and low delay. This is based on a sub-band processing system, where, in each subband, the signal is modeled as an amplitude modulated sum of sinusoids. The envelopes are estimated using frequency-domain linear prediction and the prediction coefficients are quantized. As a proof of concept, we evaluate different configurations in a subjective listening test, and this shows that the proposed method offers significant improvements in sinusoidal coding. Furthermore, the properties of the frequency-domain linear prediction-based envelope estimator are analyzed

关键词： Amplitude modulation Chirp modulation Modulation coding audio coding Delay Frequency domain analysis Frequency estimation Rate-distortion Distortion measurement Predictive coding

来源：评论

学校读者我要写书评

暂无评论

STEREO AND MULTICHANNEL audio coding WITH ROOM RESPONSE COMPENSATION FOR IMPROVED coding TRANSPARENCY

STEREO AND MULTICHANNEL AUDIO CODING WITH ROOM RESPONSE COMP...

引用

European Signal Processing Conference

作者： Maciej Bartkowiak University of Pisa

The paper presents a very simple enhancement of joint coding of stereo and surround channels within a perceptual audio codec. Moreover, the paper proposes two improvements to standard parametric stereo and spatial audio compression in order to avoid the smearing of transients in the process of channel downmixing. The improvements consist in compensating of inter-channel delays prior to mixdown, as well as additional encoding of the room response for realistic reconstruction of the stereo ambience.

关键词： audio coding compensated audio MULTICHANNEL Transparency audio compression

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120页 << < 49 50 51 52 53 54 55 56 57 58 > >>

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：