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检索条件"机构=Key Laboratory of Advanced Display and System Application"

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Multi-beam steering for 3D audio rendering in linear phased loudspeaker arrays

Multi-beam steering for 3D audio rendering in linear phased ...

引用

2nd International Conference on Image Analysis and Signal Processing, IASP'2010

作者： Tang, Yongqing Fang, Yong Huang, Qinghua School of Comm. and Info. Eng. Key Lab of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai China

ISBN: (纸本)9781424455553

In order to improve flexibility of surrounding stereo system, a novel system for 3D audio rendering is proposed in this paper based on multi-beam steering, which is composed of five beam units using linear loudspeaker arrays. By controlling accurately time delay or phase of loudspeakers, beam can be formed in a desired direction. The simulation results show that the proposed method is reasonable and effective. ©2010 IEEE.

关键词： Loudspeakers

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Performance analysis of region of interest video transmission system

Performance analysis of region of interest video transmissio...

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2007 IET Conference on Wireless, Mobile and Sensor Networks (CCWMSN07)

作者： Yongfang Wang Zhaoyang Zhang Zhi Liu School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China

We investigate the video transmission efficiency of channel code, modulation mode and layered space time code for region of interest video transmission system. Excellent channel code achieves more coding gains, suitable modulation mode adaptively overcomes different channel fading and layered space time code achieves not only coding gain but only diversity gain. Based on the above analysis, we propose an adaptive video transmission system according to channel environment and video constructed quality require. We derive an analytic bound for the error probability, and conduct experiments for H.264 interest of region video streaming. It is shown that the proposed system enhances the PSNR performance of region of interest significantly by adaptive choice of channel code, modulation mode, and layered space time code in the wireless channel.

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VLSI implementation of sub-pixel interpolator for AVS encoder

VLSI implementation of sub-pixel interpolator for AVS encode...

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2010 International Conference on Life system Modeling and Simulation, LSMS 2010 and the 2010 International Conference on Intelligent Computing for Sustainable Energy and Environment, ICSEE 2010

作者： Guanghua, Chen Anqi, Wang Dengji, Hu Shiwei, Ma Weimin, Zeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

Interpolation is the main bottleneck in AVS real-time high definition video encoder for its high memory bandwidth and large calculation complexity caused by the new coding features of variable block size and 4-tap filter. In this paper, a high performance VLSI architecture of interpolation supporting AVS Baseline@L4 is presented. Vertical redundant data reuse, horizontal redundant data reuse and sub-pixel data reuse schemes are presented to reduce memory bandwidth and processing cycle. The separated 1-D interpolation filters are used to improve throughput and hardware utilization. The proposed design is implemented on FPGA with operating frequency of 150MHz and can support 1080p (1920x1080)/30fps AVS real-time encoder. It is a useful intellectual property design for real-time high definition video application. © 2010 Springer-Verlag.

关键词： Pixels

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Improvement of interleaved multiplication algorithm

Improvement of interleaved multiplication algorithm

引用

1st International Conference on Information Science and Engineering, ICISE2009

作者： Chen, Guanghua Liu, Ming Zhu, Jingming Zheng, Weifeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769538877

An improved modular multiplication algorithm based on the interleaved multiplication is presented in this paper. Carry save addition (CSA), redundant representation, a fast lookup table and a counter register are used to improve this algorithm. Carry save addition and redundant representation are used to replace other additions like carry select addition, carry lookahead addition and so on, because carry propagation brought by those additions can be prevented by carry save addition, and redundant representation can make the arithmetic operations fast without carry propagation. The fast lookup table with only 7 pre-calculated values can minimize the number of additions, and can only be addressed once in one iteration, which not only speed up, but also save area compared with other literatures used lookup tables. The iteration number can be reduced by a counter register being added in this improved method to compute the number of 0 from the most significant bit of one operand like X. Analysis and emulation result shows the area and time complexity (AT) of the improved method is equal or even less than 2n2. ©2009 IEEE.

关键词： Table lookup

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Interactive object segmentation using kernel density estimation based graph cuts

Interactive object segmentation using kernel density estimat...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Zhongmin Han Baoyan Ding Zhi Liu Liquan Shen Zhaoyang Zhang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China

This paper proposes an efficient and flexible interactive object segmentation approach using kernel density estimation based graph cuts. First, the user draws scribbles to roughly mark the interested object and background, respectively, and the likelihood of object versus background is evaluated for each pixel using nonparametric kernel density estimation. Then pixels are globally classified into object and background using graph cuts, which uses likelihood as data cost and gradient information to generate a spatial varying smoothness cost. If the user is not satisfied with the initially segmented object, the user is allowed to mark these undesirable regions by drawing additional scribbles. A local region for refinement is then adaptively determined, and pixel reclassification is performed to extract a more accurate object boundary. Experimental results on a variety of images demonstrate that interested objects with good visual quality can be extracted with less user interaction and a timely response.

关键词： Object segmentation Kernel Image segmentation Humans Iterative algorithms Data mining displays Pixel Cost function Parametric statistics

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Mosaic Generation in H.264 Compressed Domain

Mosaic Generation in H.264 Compressed Domain

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International Conference on Intelligent Sensing and Information Processing (ICISIP)

作者： Zhi Liu Zhaoyang Zhang Liquan Shen Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China School of Communication and Information Engineering Shanghai University Shanghai China

This paper presents an efficient approach to mosaic generation in H.264 compressed domain. The proposed mosaic generation approach fully exploits several new coding characteristics of the H.264 standard, i.e., variable block size and the quarter-pel accuracy of motion vector (MV). A uniformly sampled and normalized MV field is first derived from the H.264 compressed video. Then an affine model is used to estimate the global motion from the normalized MV field, and the model parameters are iteratively refined based on outlier rejection scheme. Finally, the most recent and reliable background pixels from multiple frames are warped to the reference frame and then used to integrate the final mosaic. Experimental results demonstrate that the proposed approach is efficient for mosaic generation in H.264 compressed domain.

关键词： Video compression Motion estimation Video sequences Object segmentation Iterative algorithms Image motion analysis Parameter estimation Character generation Indexing Video coding

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Deep Convolutional Long Short-Term Memory Network based video abnormal behavior prediction

Deep Convolutional Long Short-Term Memory Network based vide...

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Big Data & Artificial Intelligence & Software Engineering (ICBASE), International Conference on

作者： Wenqing Mao Yepeng Guan School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China

A deep convolutional long short-term memory network (DC-LSTM) based video abnormal behavior prediction method has been proposed. The DC-LSTM deepens the single-layer convolution of the convolutional LSTM, which can be applied to suppress structural information ambiguity in predicting multiple frames. Mean square error is combined with structural similarity to perform loss reconstruction for correlative calculating between predicted and input frames. An adaptive dynamic double-threshold strategy based on the loss reconstruction is adopted to determine whether the video is abnormal. Comparisons with some state-of-the-arts have highlighted the superior performance of the proposal.

关键词： Integrated optics Correlation Convolution Prediction methods Mean square error methods Optical imaging Hardware

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A novel high gray scale drive method for TFT-LCD

A novel high gray scale drive method for TFT-LCD

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作者： Feng, Ran Tang, Zhi-Jie Xu, Mei-Hua Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai University Shanghai 200072 China Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

ISBN: (纸本)9787561752289

This paper describes a novel drive method of TFT-LCD for high gray scale display. The method is based on mix-control of voltage DAC and advanced sub-frame modulation. The low-bit gray scale is driven by the DAC while the high-bit gray scale is generated by applying advanced sub-frame modulation. This method is applied to a 1024 * 768 dots RGB TFT-LCD panel which can display 256-level gray scale.

关键词： Modulation

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Color correction method based on histogram segmentation for multiview video

Color correction method based on histogram segmentation for ...

引用

IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2009)

作者： Yi Liu Yongfang Wang Zhaoyang Zhang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China

Color differences between different views can cause performance degradation in multiview video coding. In order to overcome this problem, in this paper a local color correction method based on histogram segmentation is proposed. In the proposed method, we correct the color changes in the different segmentation regions between the current picture and the reference picture. Extensive experimental results demonstrate that the proposed method outperforms the traditional global linear color correction methods with objective mean of disparity values and subjective visual quality, and achieves better correction results.

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Method to Prevent Thin Film Cracking of Thin Film Encapsulation in Flexible AMOLED

Method to Prevent Thin Film Cracking of Thin Film Encapsulat...

引用

International Conference on Electronic Packaging Technology

作者： Wei Ao Xiaogang Xin Xiangchao Liu Yinghui Zhu Feng Gao Chunhong Li Jianhua Zhang Chaochi Peng Yan Wang Kunshan Govisionox Optoelectronics Co. LTD Kunshan China Key Laboratory of Advanced Display and System Application Shanghai University Shanghai China

PECVD hydrogenated silicon oxynitride (SiON) thin film, due to its excellent chemical and physical properties, is widely used in flexible encapsulation as an protective layer. However, SiON thin film cracking severely restricted the performance of the thin film encapsulation, and cannot be effectively tackled by flexible electronics industry. So improving the quality of the SiON thin film and preventing thin film cracking is crucial to flexible electronics industry. In this paper, effects of RF power, pressure, process gas on stress property in SiON thin film were studied in detail by stress meter. Therefore, increasing RF power, pressure and decreasing H_2 flow can prevent SiON thin film cracking.

关键词： PECVD SiON Thin Film Stress

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