19.2: xvYCC: A New Standard for Video Systems using Extended-Gamut YCC Color Space

Matsumoto, Tatsuhiko; Shimpuku, Yoshihide; Nakatsue, Takehiro; Haga, Shuichi; Eto, Hiroaki; Akiyama, Yoshiyuki; Katoh, Naoya

doi:10.1889/1.2433175

Cited by 12 publications

(12 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the technologies for digital cameras and printers improve, sRGB has become insuffi cient for reproducing the vivid images taken by high-end digital cameras. New standards such as the Adobe and xvYCC color spaces, which cover approximately 100% of the NTSC color space, have been proposed, and high-end LCD monitors and televisions covering these color spaces are currently in development [74,75].…”

Section: Color Performancementioning

confidence: 99%

Technical evolution of liquid crystal displays

2009

View full text Add to dashboard Cite

I n 1888, more than a century ago, the Austrian botanist FriedrichReinitzer discovered an intermediate state of matter between isotropic liquid and lattice-structured crystal [1][2][3]. Th is state, later termed liquid crystal (LC), remained merely a novelty for many years until suitable applications for the technology began to become apparent. From the late 1960s, following the realization that various display applications were possible, the popularity of liquid crystal as a research fi eld expanded rapidly, attracting the interest of many scientists who made fundamental contributions to the technologies that have led to the spectacular success of liquid crystal displays (LCDs) [3][4][5][6][7][8][9][10][11][12][13]. Th e development of the twisted nematic (TN) [4] and supertwisted nematic (STN) [5] cell confi gurations, along with the necessary manufacturing technologies [6][7][8][9], resulted in the birth of the LCD industry in the late 1970s and early 1980s. The subsequent development of thin-film transistor (TFT) technology provided a further boost to the industry in the late 1980s [14,15]. Th e boom was signifi cantly supported by the advancement of material technologies such as the highly reliable manufacturing of liquid crystal base materials, and the development of polymers for the alignment layer, color fi lter materials, and sheet-type polarizers formed from the poly(vinyl alcohol)-iodine complex.In the 1990s, LCDs occupied an important position in the display market primarily through notebook applications, although the cathode ray tube (CRT) continued to dominate the desktop monitor and television markets. Th e plasma display panel (PDP), which appeared in the commercial market in 1997, pioneered the large-area fl at panel display market. It was widely predicted at the time that PDPs would maintain the lead in the large-area display market and that LCDs in small-display information technology (IT) applications would soon be replaced by new technologies such as displays based on organic light-emitting diodes (OLEDs) [16,17]. Such predictions were based on the belief that the LCD technology suff ered from serious limitations in terms of both off -axis image quality and moving picture quality, and also that it had proved diffi cult to obtain reasonable manufacturing yields of large-area TFT panels. However, these predictions, as we now know, turned out to be incorrect. Th e application of LCDs has expanded rapidly in recent years from purely information technology (IT) applications to the television and mobile display markets, and now even to very-large-area digital information displays (DIDs).Interestingly, while LCDs penetrated the traditional territories of other display technologies including CRTs and PDPs, attracting inevitable and heavy competition from these technologies, the most critical competitors were in fact alternative LCD technologies. A range of LCD modes and technologies are now applied in the same areas of application and are compared directly with one another in the market. In applicat...

show abstract

Section: Color Performancementioning

confidence: 99%

Technical evolution of liquid crystal displays

2009

View full text Add to dashboard Cite

show abstract

“…This standard uses antisymmetrical gamma correction to compress the negative signal. IEC 61966-2-4(xvYCC) is a new standard for video systems using extendedgamut YCC color space [3,4] . This standard adopts centrosymmetric gamma correction curve with limitless value range of input and output signals.…”

Section: Introductionmentioning

confidence: 99%

Two Kinds of Methods to Extend the Color Gamut of DTV System with Extended Quantization Levels

Xu¹,

Li²,

Li³

2009

2009 2nd International Congress on Image and Signal Processing

View full text Add to dashboard Cite

ITU-R BT.1361 and IEC 61966-2-4(xvYCC) are two standards for video systems with extended-gamut YCC color space, the methods these two standards use to extend the color gamut are not the same. IEC 61966-2-4 put forward that the available quantization levels can be extended to [1, 254] in 8-bit quantization. This paper calculated the value range of luma and chroma signals corresponding to this available quantization range with the colorbar signal which has been widely used in TV system, and put forward two solutions to the problem that the range of extended chroma signals was beyond the conveyable range. One solution was to compress the value and quantization range of extended luma signal in order to make the range of extended chroma signal is exactly within the conveyable range; the other solution was to keep the value and quantization range of luma signal unchanged and use nonlinear(piecewise linear) quantization to process chroma signals. Experimental data with two standards (ITU-R BT.1361 and IEC 61966-2-4) were given out for each solution respectively. Experimental results show that both of the schemes can effectively extend the color gamut with different value of color difference ( 00 E Δ ) and coverage ratio of color gamut. And in the case of compatible transmission with conventional color gamut, both standards can extend the gamut effectively but not significantly, there is still a biggish space for further research on advanced algorithms able to extend color gamut.

show abstract

“…The problem of limited color gamuts of encoding schemes becomes more actively discussed in the standard organizations (CIE-TC8, IEC TC100/TA2, and ISO) because of lots of recently developed wide color gamut analysis and reproduction systems in the industry. A wide color gamut LED-, Laser-display, and Multi-primary display are the one of these examples [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Except the symmetrical tone curve correction of the encoding procedure, xvYCC is almost compatible with the prior standard of ITU-R.BT.1361. The primary goal of this standard is encoding of the extended color gamut so that the capturing and reproducing range of the color gamut of technical imaging devices can be expanded for wide range of real colors [5,7,11].…”

Section: Introductionmentioning

confidence: 99%