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IEEE International Conference onMultimedia and Expo, ICME 2007

作者： Liquan, Shen Zhi, Liu Zhaoyang, Zhang Xuli, Shi Key Lab. of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)1424410177

The H.264 video coding standard adopts multiple reference frames for motion estimation. This new feature improves the prediction accuracy of inter-coding blocks significantly, but it results in a considerable increase in encoder complexity, mainly regarding to multi-frame selection and motion estimation. The reference software JM adopts the full search scheme, and the increased computation is in proportion to the number of searched reference frames. However, the reduction of prediction residues is highly dependent on the nature of sequences, not on the number of searched frames. In this paper, we propose an adaptive and fast multi-frame selection algorithm (AFMFS) based on motion vectors and SAD information coming from previous searches to adaptively terminate the procedure of multiple reference frames selection. Compared with the full search algorithm and the flexible multi-reference frame search criterion (FMRFSC), simulation results show that the proposed algorithm can save 55.28% and 40.23% computation cost on average, respectively, while it still maintains similar coding efficiency. © 2007 IEEE.

关键词： Motion estimation

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A 2.4GHz high efficient monolithic class E power amplifier

A 2.4GHz high efficient monolithic class E power amplifier

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Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Su, Jie Zhang, Shulin Chen, Lei Tian, Liang Zhou, Jin Ruan, Ying Ran, Feng Lai, Zongsheng Institute of Microelectronics Circuit and System East China Normal University Shanghai 20062 China Key Laboratory of Advanced Display and System Application ShangHai University Shanghai 20062 China

ISBN: (纸本)9781424467372

This paper presents a 2.4GHz monolithic Class E power amplifier based on Grace 0.18um SiGe BiCMOS technology. It has a two-stage structure and adopts small DC feed inductors and on-chip matching networks. Without any off-chip components, the power amplifier achieves maximum output power of 22.4dBm. and the PAE is 33% with 2V supply. After optimizing the component parameter, the input and output terminals are both well matched to baseband and antenna respectively. With EER or ET technology this switch-mode amplifier can realize linear amplification, resulting in impressive high efficient in future communication system.

关键词： Power amplifiers

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Unequal decoding power allocation for efficient video transmission

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Journal of Shanghai University(English Edition) 2010年第1期14卷 60-65页

作者：王永芳余松煜杨小康张兆杨 Key Laboratory of Advanced Display and System Application School of Communication and Information Engineering Shanghai University Institute of Image Communication and Information Processing Research Shanghai Jiao Tong University

We present an unequal decoding power allocation （UDPA） approach for minimization of the receiver power consumption subject to a given quality of service （QoS）, by exploiting data partitioning and turbo decoding. We assign unequal decoding power of forward error correction （FEC） to data partitions with different priority by jointly considering the source coding, channel coding and receiver power consumption. The proposed scheme is applied to H.264 video over additive white Gaussion noise （AWGN） channel, and achieves excellent tradeoff between video delivery quality and power consumption, and yields significant power saving compared with the conventional equal decoding power allocation （EDPA） approach in wireless video transmission.

关键词： power allocation turbo code data partition joint source and channel code

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Wigner-Ville distribution and cross Wigner-Ville distribution of noisy signals

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Journal of systems Engineering and Electronics 2008年第5期19卷 1053-1057页

作者： Chen Guanghua Ma Shiwei Liu Ming Zhu Jingming Zeng Weimin Key Laboratory of Advanced Display and System Applications Ministry of Education & Microelectronic Research and Development Center Shanghai Univ. Shanghai 200072 P. R. China

The Wigner-Ville distribution （WVD） and the cross Wigner-Ville distribution （XWVD） have been shown to be efficient in the estimation of instantaneous frequency （IF）. But the statistical result of the IF estimation from XWVD peak is much better than using WVD peak. The reason is given from a statistical point of view. Theoretical studies show that XWVD of the analyzed signal can be estimated from XWVD of the noise-contaminated signal. The estimation is unbiased, and the variance is equal to that of noise. In this case, WVD cannot be estimated from W-VD of the noise-contaminated signal. Therefore, higher SNR is required when WVD is used to analyze signals.

关键词： Wigner-Ville distribution cross Wigner-Ville distribution instantaneous frequency expectation variance.

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The design of synchronous module in AM-OLED display controller

The design of synchronous module in AM-OLED display controll...

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2011 International Conference on Electric and Electronics, EEIC 2011

作者： Junwei-Ma Ran, Feng School of Mechatronical Engineering and Automation Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University China

ISBN: (纸本)9783642216961

On the basis of the analysis to the framework of AM-OLED display controllers, a key module - synchronous module is studied. In this paper, a FIFO circuit (first in first out) is designed using Gray convert technology and dual-port ram, which realizing scatheless transmit between different clock domain. The working principle of FIFO is analyzed, and the optimized FIFO circuit structure was put forward to improve the working stability of the FIFO. The synchronous module circuit was implemented by VerilogHDL language simulated through VCS (Verilog compiled simulator). The design had been applied successfully to a type of full colour TFT-OLED panel driver controller with gray levels 256, frame scanning frequency 60Hz ~ 100Hz. The testing results showed that this controller worked well with a stable and vivid display. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Controllers

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Sampled-data Observer Design for a Class of Stochastic Nonlinear systems Based on the Approximate Discrete-time Models

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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 507-511页

作者： Xinxin Fu Yu Kang Pengfei Li Department of Automation University of Science and Technology of China State Key Laboratory of Fire Science Department of AutomationInstitute of Advanced TechnologyUniversity of Science and Technology of China Key Laboratory of Technology in GeoSpatial Information Processing and Application System Chinese Academy of Sciences IEEE

In this paper,we studied the approximate sampleddata observer design for a class of stochastic nonlinear ***-Maruyama approximation was investigated in this paper because it is the basis of other higher precision numerical methods,and it preserves important structures of the nonlinear ***,the form of Euler-Maruyama model is simple and easy to be *** results provide a reference for sampled-data observer design method for such stochastic nonlinear systems,and may be useful to many practical control applications,such as tracking control in mechanical *** the effectiveness of the approach is demonstrated by a simulation example.

关键词： Approximation model exponentially bounded sampled-data observer stochastic nonlinear

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Depth map coding method for scalable video plus depth 1

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8th International Conference on Image and Graphics, ICIG 2015

作者： Li, Panpan Ma, Ran Hou, Yu An, Ping School of Communication and Information Engineering Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Application of the Ministry of Education Shanghai200072 China

ISBN: (数字)9783319219639

ISBN: (纸本)9783319219622

Depth map coding along with its associated texture video plays an important role in the display of 3D scene by Depth Image Based Rendering technique. In this paper, the inter-layer motion prediction in Scalable Video Coding is applied in order to utilize the similarity of the motion data between texture video and its associated depth map. Additionally, in order to preserve the edge in depth map, the edge detection algorithm is proposed in depth map coding, which combines the conventional Sobel edge detection and the block-based coding scheme of SVC. And the dynamic quantization algorithm is proposed to preserve the information of boundary regions of the depth map. Simulation results show that the proposed method achieves the BDPSNR gains from 0.463 dB to 0.941 dB for the depth map, and the Bjøntegaard bitrates savings range from 9.72% to 19.36% for the video plus depth. © Springer International Publishing Switzerland 2015.

关键词： Edge detection

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A Generic Image Feature Extraction Method Towards Multiple Vision Tasks 9th

A Generic Image Feature Extraction Method Towards Multiple V...

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9th International Forum on Digital Multimedia Communication, IFTC 2022

作者： Wei, Jiao An, Ping Huang, Kunqiang Yang, Chao Ma, Ran School of Communication and Information Engineering Shanghai University Shanghai200444 China Key Laboratory for Advanced Display and System Application Ministry of Education Shanghai200072 China

ISBN: (纸本)9789819908554

With the developments of artificial intelligence and image processing technology, the study of multiple vision tasks has become a hot topic in the field of computer vision, and the key to implementing vision tasks lies in the feature extraction of images. To meet the demands of modern life for multiple vision tasks and promote the deployment of artificial intelligence on edge devices, we propose an image feature extraction method applied to multiple vision tasks, which promotes the deployment of artificial intelligence on edge devices. Firstly, the function of the secondary task in multi-task learning is combined with a feature migration strategy to build a feature migration model for multiple vision tasks. Then, a generic feature extraction model based on feature fusion and feature migration is established under the guidance of image classification. The experimental results show that the proposed feature migration model with image classification as the secondary task can improve the mAP (mean average precision) of the target detection by 5.5%, and the feature migration model with target detection as the secondary task can improve the average accuracy of the image classification by 1%. The proposed generic feature extraction model can effectively implement the image classification and target detection tasks. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Feature extraction

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Color correction method based on histogram segmentation for multiview video

Color correction method based on histogram segmentation for ...

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Institution of Engineering and Technology International Communication Conference on Wireless Mobile and Computing

作者： Liu, Yi Wang, Yongfang Zhang, Zhaoyang School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9781849191388

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.

关键词： Color

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Depth map upsampling using segmentation and edge information 1

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8th International Conference on Image and Graphics, ICIG 2015

作者： Zheng, Shuai An, Ping Zuo, Yifan Zou, Xuemei Wang, Jianxin School of Communication and Information Engineering Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Application of the Ministry of Education Shanghai200072 China

ISBN: (数字)9783319219639

ISBN: (纸本)9783319219622

A depth upsampling method based on Markov Random Field is proposed, considering the depth and color information. First, the initial interpolated depth map is inaccurate and oversmooth, we use a rectangle window centered on every pixel to search the maximum and minimum depth value of the depth map to find out the edge pixels. Then, we use the depth information to guide the segmentation of the color image and build different data terms and smoothness terms for the edge and non-edge pixels. The result depth map is piecewise smooth and the edge is sharp. In the meanwhile, the result is good where the color information is consistent while the depth is not or where the depth information is consistent while the color is not. Experiments show that the proposed method performs better than other upsampling methods in terms of mean absolute difference (MAD). © Springer International Publishing Switzerland 2015.

关键词： Color

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