In this paper, we study the extension of isometries between the unit spheresof some Banach spaces E and the spaces C(Ω). We obtain that if the set sm.S_1(E) of all smoothpoints of the unit sphere S_1(E) is dense in S...In this paper, we study the extension of isometries between the unit spheresof some Banach spaces E and the spaces C(Ω). We obtain that if the set sm.S_1(E) of all smoothpoints of the unit sphere S_1(E) is dense in S_1(E), then under some condition, every surjectiveisometry V_0 from S_1(E) onto S_1(C(Ω)) can be extended to be a real linearly isometric map V of Eonto C(Ω). From this result we also obtain some corollaries. This is the first time we study thisproblem on different typical spaces, and the method of proof is also very different too.展开更多
High Dynamic Range (HDR) and Wider Colour Gamut (WCG) content represents a greater range of luminance levels and a more complete reproduction of colours found in real?world scenes. The current video distribution envir...High Dynamic Range (HDR) and Wider Colour Gamut (WCG) content represents a greater range of luminance levels and a more complete reproduction of colours found in real?world scenes. The current video distribution environments deliver Standard Dynam?ic Range (SDR) signal Y′CbCr. For HDR and WCG content, it is desirable to examine if such signal format still works well for compression, and to know if the overall system performance can be further improved by exploring different signal formats. In this paper, ITP (ICTCP) colour space is presented. The paper concentrates on examining the two aspects of ITP colour space: 1) ITP characteristics in terms of signal quantization at a given bit depth; 2) ITP compression performance. The analysis and simulation results show that ITP 10 bit has better properties than Y′CbCr?PQ 10bit in colour quantization, constant luminance, hue property and chroma subsampling, and it also has good compression efficiency. Therefore it is desirable to adopt ITP colour space as a new signal format for HDR/WCG video compression.展开更多
CPL和WSVG CPL的全称是Cyberathlete Professional League(职业玩家联盟)。自开办之初,就以赛事的专业性而闻名全球。但在这里,笔者并不打算介绍CPL的历史,因为这些信息,国内的一些相关网站已经介绍得相当详细了,我会从另外一个视角出...CPL和WSVG CPL的全称是Cyberathlete Professional League(职业玩家联盟)。自开办之初,就以赛事的专业性而闻名全球。但在这里,笔者并不打算介绍CPL的历史,因为这些信息,国内的一些相关网站已经介绍得相当详细了,我会从另外一个视角出发．告诉你比赛之外的一些事情,而这些事情也在潜移默化的影响着我们的电竞生活。展开更多
文摘In this paper, we study the extension of isometries between the unit spheresof some Banach spaces E and the spaces C(Ω). We obtain that if the set sm.S_1(E) of all smoothpoints of the unit sphere S_1(E) is dense in S_1(E), then under some condition, every surjectiveisometry V_0 from S_1(E) onto S_1(C(Ω)) can be extended to be a real linearly isometric map V of Eonto C(Ω). From this result we also obtain some corollaries. This is the first time we study thisproblem on different typical spaces, and the method of proof is also very different too.
文摘High Dynamic Range (HDR) and Wider Colour Gamut (WCG) content represents a greater range of luminance levels and a more complete reproduction of colours found in real?world scenes. The current video distribution environments deliver Standard Dynam?ic Range (SDR) signal Y′CbCr. For HDR and WCG content, it is desirable to examine if such signal format still works well for compression, and to know if the overall system performance can be further improved by exploring different signal formats. In this paper, ITP (ICTCP) colour space is presented. The paper concentrates on examining the two aspects of ITP colour space: 1) ITP characteristics in terms of signal quantization at a given bit depth; 2) ITP compression performance. The analysis and simulation results show that ITP 10 bit has better properties than Y′CbCr?PQ 10bit in colour quantization, constant luminance, hue property and chroma subsampling, and it also has good compression efficiency. Therefore it is desirable to adopt ITP colour space as a new signal format for HDR/WCG video compression.
文摘CPL和WSVG CPL的全称是Cyberathlete Professional League(职业玩家联盟)。自开办之初,就以赛事的专业性而闻名全球。但在这里,笔者并不打算介绍CPL的历史,因为这些信息,国内的一些相关网站已经介绍得相当详细了,我会从另外一个视角出发．告诉你比赛之外的一些事情,而这些事情也在潜移默化的影响着我们的电竞生活。
