To overcome some drawbacks of Viterbi algorithm （VA）, such as exponential growing complexity of decoding, and its poor performance under bad channel conditions, some available known information must be used as cons...To overcome some drawbacks of Viterbi algorithm （VA）, such as exponential growing complexity of decoding, and its poor performance under bad channel conditions, some available known information must be used as constrained condition and apriori knowledge for decoding. A new constrained VA is proposed by adding con- straint bits directly for conventional codec. Compared with the conventional VA, under the bad channel condi- tion, the proposed scheme can improve the peak signal to noise ratio （PSNR） of the decoding image 2--10 dB by changing the number of constrained bits. Experimental results show that it is an efficient error-controlling way for the transmission of set partitioning in hierarchical trees （SPIHT） coded image.展开更多
From the perspective of communication science,the communication of architectural images in the new media age has an obvious beautifying trend.Due to the differences in politics,economics,and cultural environment betwe...From the perspective of communication science,the communication of architectural images in the new media age has an obvious beautifying trend.Due to the differences in politics,economics,and cultural environment between China and western countries,the beautification of architectural images in China is a unique phenomenon.This study classifies the beautification of Chinese architectural images into different types in terms of image communication:audience orientation,time orientation,space orientation,and cultural orientation.By investigating and analyzing relevant cases,this study explores the beautification of Chinese architectural images in the new media age and puts forward thoughts and evaluation,aiming to better comprehend the relationship between beautification and architectural communication.展开更多
This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors ...This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors provide eyes for autonomous and connected vehicles.VLC imparts data reception capability to image sensors with necessary functions,which can then be provided to autonomous and connected vehicles.In this paper,some of our research on coupling VLC to high-speed image sensors is introduced,including our key findings:the basics of ISC,a vehicle motion model,and range estimation.展开更多
The 4th National Conference on Speech,Image,Communication and Signal Pro-cessing,which was sponsored by the Institute of Speech,Hearing,and Music Acoustics,Acoustical Society of China and the Institute of Signal Proce...The 4th National Conference on Speech,Image,Communication and Signal Pro-cessing,which was sponsored by the Institute of Speech,Hearing,and Music Acoustics,Acoustical Society of China and the Institute of Signal Processing,Electronic Society ofChina,was held,25—27 October,1989,at Beijing Institute of Post and Telecommun-ication.The conference drew a registration of 150 from different places in the country,which made it the largest conference in the last eight years.The president of Institute of Speech,Hearing,and Music Acoustics,ASC,professorZHANG Jialu made a openning speech at the openning session,and the honorary presi-dent of Acoustical Society of China,professor MAA Dah-You and the president of展开更多
A new region of interest, （ROI） coding called partial multiply bitplane alternating shift （PMBAShift） is presented in this paper. In PMBAShift, the partial most significant bitplanes of ROI are shifted up and no o...A new region of interest, （ROI） coding called partial multiply bitplane alternating shift （PMBAShift） is presented in this paper. In PMBAShift, the partial most significant bitplanes of ROI are shifted up and no overlap with any bitplane of background （BG）. The most significant bitplanes of BG and general significant bitplanes of ROI coefficients are shifted up by bitplane-by-bitplane alternating sealing. Finally, the least significant bitplanes of ROI and the general significant bitplanes of BG are obtained in the original position and the least significant bitplanes of BG coefficients are shifted down and no overlap with any bitplane. The new method not only retains advantages of maximum shift （Maxshift） method, but also efficiently compresses multiple ROIs according to different degrees of interest without any shape information.展开更多
文摘To overcome some drawbacks of Viterbi algorithm （VA）, such as exponential growing complexity of decoding, and its poor performance under bad channel conditions, some available known information must be used as constrained condition and apriori knowledge for decoding. A new constrained VA is proposed by adding con- straint bits directly for conventional codec. Compared with the conventional VA, under the bad channel condi- tion, the proposed scheme can improve the peak signal to noise ratio （PSNR） of the decoding image 2--10 dB by changing the number of constrained bits. Experimental results show that it is an efficient error-controlling way for the transmission of set partitioning in hierarchical trees （SPIHT） coded image.
文摘From the perspective of communication science,the communication of architectural images in the new media age has an obvious beautifying trend.Due to the differences in politics,economics,and cultural environment between China and western countries,the beautification of architectural images in China is a unique phenomenon.This study classifies the beautification of Chinese architectural images into different types in terms of image communication:audience orientation,time orientation,space orientation,and cultural orientation.By investigating and analyzing relevant cases,this study explores the beautification of Chinese architectural images in the new media age and puts forward thoughts and evaluation,aiming to better comprehend the relationship between beautification and architectural communication.
基金supported in part by Japan Society for the Promotion of Science(JSPS)KAKENHI(No.16H04364).
文摘This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors provide eyes for autonomous and connected vehicles.VLC imparts data reception capability to image sensors with necessary functions,which can then be provided to autonomous and connected vehicles.In this paper,some of our research on coupling VLC to high-speed image sensors is introduced,including our key findings:the basics of ISC,a vehicle motion model,and range estimation.
文摘The 4th National Conference on Speech,Image,Communication and Signal Pro-cessing,which was sponsored by the Institute of Speech,Hearing,and Music Acoustics,Acoustical Society of China and the Institute of Signal Processing,Electronic Society ofChina,was held,25—27 October,1989,at Beijing Institute of Post and Telecommun-ication.The conference drew a registration of 150 from different places in the country,which made it the largest conference in the last eight years.The president of Institute of Speech,Hearing,and Music Acoustics,ASC,professorZHANG Jialu made a openning speech at the openning session,and the honorary presi-dent of Acoustical Society of China,professor MAA Dah-You and the president of
基金This work was supported by the National Natu-ral Science Foundation of China (No. 40372129 and 59638220)the Youth Teacher Foundation of Bei-jng Normal University.
文摘A new region of interest, （ROI） coding called partial multiply bitplane alternating shift （PMBAShift） is presented in this paper. In PMBAShift, the partial most significant bitplanes of ROI are shifted up and no overlap with any bitplane of background （BG）. The most significant bitplanes of BG and general significant bitplanes of ROI coefficients are shifted up by bitplane-by-bitplane alternating sealing. Finally, the least significant bitplanes of ROI and the general significant bitplanes of BG are obtained in the original position and the least significant bitplanes of BG coefficients are shifted down and no overlap with any bitplane. The new method not only retains advantages of maximum shift （Maxshift） method, but also efficiently compresses multiple ROIs according to different degrees of interest without any shape information.
