XvYCC: Béda antarrépisi

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Révisi nurutkeun 13 Méi 2008 06.21

xvYCC atawa Extended-gamut YCC nyaeta hiji rohangan kelir nu dipake dina elektronika video set televisi panel rata, nu ngarojong 1.8 kalieun jumlah kelir nu dipake dina rohangan kelir sRGB.^[1] xvYCC ditetepkeun ku IEC Oktober 2005 tur dipublikasikeun Januari 2006 minangka IEC 61966-2-4. Spektrum nu leuwih lega tina backlighting LED ngaganti katoda tiis nyababkeun bisana nambah pamidang color gamut LCD.

xvYCC make jangkah ajen nu lengkep (1 tepi ka 254 dina hiji rohangan 8-bit) pikeun midangkeun kelir. Dina BT.601 jeung BT.709, kelir RGB dipidangkeun ukur ku ajen 8-bit ti 16 tepi ka 235. Jangkah nu kawates ieu dijieun keur mere lolongkrang pikeun undershoot jeung overshoot, nu mangrupakeun sipat pasinyalan TV analog. Dina pasinyalan TV digital mah, undershoot jeung overshoot teh teu aya, lusabab kitu ajen ti 1-15 katut 235-254 bisa dipake keur midangkeun kelir nu sajati. Pikeun ngajaga kacocogan ka tukang jeung standar samemehna, kelir standar beureum (red (R)), hejo (green (G)), bulao (blue (B)) jeung bodas (white) diitung keneh make susunan nu sarua dina rohangan kelir. Jangkah ajen digital nu leuwih rubak bisa mere lolongkrang keur midangkeun hejo kolot (deeper greens), beureum kolot (deeper reds), katut bulao kolot (deeper blues) - tur tangtuna oge kelir-kelir panengah nu samemehna aya dina saluareun wawates dina rohangan kelir CCIR 601.

Rohangan kelir televisi définisi luhur nu didefinisikeun ku BT.709 ngawengku ukur 45 persen tina ajen nu bisa dipake kalayan indeks RGB ti 1 tepi ka 254, sabab susunan eta kawates ka 16 tei ka 234 ku spesifikasi BT. Standar xvYCC make standard 1 tepi ka 254, tur bisa nyandikeun (encode) leuwih ti dua kalieun jumlah ajen kelir. (Sistim sRGB aya antara BT.709 jeung sistim xvYCC, nu mere lolongkrang keur sakabeh kombinasi ajen R, G jeung B ti 16 tepi ka 235 - leuwih loba kombinasina, tapi henteu saloba dina xvYCC.)

Dina hiji paper nu diterbitkeun ku Society for Information Display taun 2006, pangarangna metakeung 769 kelir dina Munsell Color Cascade kana rohangan BT.709 jeung rohangan xvYCC. 55% tina kelir Munsell bisa dipetakeun kana gamut sRGB, tapi 100% kelir eta bisa dipetakeun kana gamut xvYCC.^[2] Kelir u leuwih kolot bisa dijieun - contona beureum kolot bisa dijieun ku cara mere koefisien negatif kana kelir nu lalawanan.

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A mechanism for carrying the gamut boundary definition for xvYCC has been defined in the HDMI 1.3 Specification. Although HDMI 1.3's other new color feature, Deep Color, is not required to transport xvYCC color information, it is commonly associated with xvYCC because these features are used together in high-end CE systems to improve the viewing image quality. Above 480p and 576p, Deep Color systems should use Category 2 HDMI cables (indicated by a logo), which are qualified for link clock rates above 75MHz.^[3]

Rujukan

↑ "HDMI 1.3 Update" (PDF). HDMI Licensing. 2006. Diakses tanggal 2006-08-30.
↑ Matsumoto et al, 19.2: xvYCC: A New Standard for Video Systems using Extended-Gamut YCC Color Space, SID '06 Digest, pp. 1130-1133. Available from http://www.sid.org.
↑ For EDTV modes (480p and 576p), even the 12-bit Deep Color data can be transported across the link using a clock well below the upper bandwidth limit of Category 1 cables.

Tempo oge

Tumbu luar

IEC Web Store for IEC 61966-2-4

Artikel ngeunaan kelir ieu mangrupa taratas, perlu disampurnakeun. Upami sadérék uninga langkung paos perkawis ieu, dihaturan kanggo ngalengkepan.

Artikel ngeunaan éléktronik ieu mangrupa taratas, perlu disampurnakeun. Upami sadérék uninga langkung paos perkawis ieu, dihaturan kanggo ngalengkepan.

[1] "HDMI 1.3 Update" (PDF). HDMI Licensing. 2006. Diakses tanggal 2006-08-30.

[2] Matsumoto et al, 19.2: xvYCC: A New Standard for Video Systems using Extended-Gamut YCC Color Space, SID '06 Digest, pp. 1130-1133. Available from http://www.sid.org.

[3] For EDTV modes (480p and 576p), even the 12-bit Deep Color data can be transported across the link using a clock well below the upper bandwidth limit of Category 1 cables.

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@@ Baris ka-3: / Baris ka-3: @@
 xvYCC make jangkah ajen nu lengkep (1 tepi ka 254 dina hiji rohangan 8-bit) pikeun midangkeun kelir. Dina [[BT.601]] jeung [[Rec. 709|BT.709]], kelir RGB dipidangkeun ukur ku ajen 8-bit ti 16 tepi ka 235.  Jangkah nu kawates ieu dijieun keur mere lolongkrang pikeun ''[[undershoot]]'' jeung ''[[overshoot]]'', nu mangrupakeun sipat pasinyalan [[TV analog]]. Dina pasinyalan [[TV digital]] mah, undershoot jeung overshoot teh teu aya, lusabab kitu ajen ti 1-15 katut  235-254 bisa dipake keur midangkeun kelir nu sajati.  Pikeun ngajaga [[backward-compatibility|kacocogan ka tukang]] jeung standar samemehna, kelir standar beureum (red (R)), hejo (green (G)), bulao (blue (B)) jeung bodas (white) diitung keneh make susunan nu sarua dina rohangan kelir. Jangkah ajen digital nu leuwih rubak bisa mere lolongkrang keur midangkeun hejo kolot (''deeper greens''), beureum kolot (''deeper reds''), katut bulao kolot (''deeper blues'') - tur tangtuna oge kelir-kelir panengah nu samemehna aya dina saluareun wawates dina rohangan kelir [[CCIR 601]].
-{{tarjamahkeun|Inggris}}
-Even the [[high-definition television]] color space defined by BT.709 encompasses only 45 per cent of the possible values with RGB indices of 1 to 254, since those indices are limited to 16 to 234 by the BT spec.  The xvYCC standard uses 1 to 254, and can encode more than twice the number of color values.  (The [[sRGB]] system is in between the BT.709 and xvYCC systems, allowing use of all combinations of R, G and B values from 16 to 235 - more combinations, but not so many as in xvYCC.)
+Rohangan kelir [[high-definition television|televisi définisi luhur]] nu didefinisikeun ku BT.709 ngawengku ukur 45 persen tina ajen nu bisa dipake kalayan indeks RGB ti 1 tepi ka 254, sabab susunan eta kawates ka 16 tei ka 234 ku spesifikasi BT. Standar xvYCC make standard 1 tepi ka 254, tur bisa nyandikeun ''(encode)'' leuwih ti dua kalieun jumlah ajen kelir. (Sistim [[sRGB]] aya antara BT.709 jeung sistim xvYCC, nu mere lolongkrang keur sakabeh kombinasi ajen R, G jeung B ti 16 tepi ka 235 - leuwih loba kombinasina, tapi henteu saloba dina xvYCC.)
-In a paper published by [[Society for Information Display]] in 2006, the authors mapped the 769 colors in the [[Munsell|Munsell Color Cascade]] to the BT.709 space and to the xvYCC space.  55% of the Munsell colors could be mapped to the sRGB [[gamut]], but 100% of those colors could map to the xvYCC gamut.<ref>Matsumoto et al, ''19.2: xvYCC: A New Standard for Video Systems using Extended-Gamut YCC Color Space'', SID '06 Digest, pp. 1130-1133.  Available from http://www.sid.org.</ref>  Deeper hues can be created - for example a deeper red by giving the opposing color (green) a negative coefficient.
+Dina hiji paper nu diterbitkeun ku [[Society for Information Display]] taun 2006, pangarangna metakeung 769 kelir dina [[Munsell|Munsell Color Cascade]] kana rohangan BT.709 jeung rohangan xvYCC. 55% tina kelir Munsell bisa dipetakeun kana [[gamut]] sRGB, tapi 100% kelir eta bisa dipetakeun kana gamut xvYCC.<ref>Matsumoto et al, ''19.2: xvYCC: A New Standard for Video Systems using Extended-Gamut YCC Color Space'', SID '06 Digest, pp. 1130-1133.  Available from http://www.sid.org.</ref> Kelir u leuwih kolot bisa dijieun - contona beureum kolot bisa dijieun ku cara mere koefisien negatif kana kelir nu lalawanan.
+{{tarjamahkeun|Inggris}}
 A mechanism for carrying the gamut boundary definition for xvYCC has been defined in the [[HDMI]] 1.3 Specification.  Although HDMI 1.3's other new color feature, Deep Color, is not required to transport xvYCC color information, it is commonly associated with xvYCC because these features are used together in high-end CE systems to improve the viewing image quality.  Above [[480p]] and [[576p]], Deep Color systems should use Category 2 HDMI cables (indicated by a logo), which are qualified for link clock rates above 75MHz.<ref>For EDTV modes (480p and 576p), even the 12-bit Deep Color data can be transported across the link using a clock well below the upper bandwidth limit of Category 1 cables.</ref>