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JTES

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Dosiye:JTES example.png
Urugero rwabayapani JTES teletext

JTES, Ubuyapani bwa Teletext Ibisobanuro, ni protocole ikoreshwa mugushiraho mu guhindura urupapuro muri sisitemu ya Teletext, kimwe nubundi bwoko bwamakuru ya digitale, mugihe cyahagaritse intera (VBI) yerekana ibimenyetso byerekana amashusho mubuyapani. Yemejwe mu rwego mpuzamahanga CCIR 653 (ubu ITU-R BT.653) yo mu 1986 nka CCIR Teletext Sisitemu D. [1] [2]

Ifasha kwerekana imiterere ya Kanji, Katakana na Hiragana . Serivisi ishobora gukoreshwa kugirango yerekane subtitles, cyclicale page cyangwa progaramu ya pseudo. ikaba ifite n'uburyo bwo kwerekana amafoto, geometrie cyangwa amajwi. [1] [3]

Amateka

[Hindura | hindura inkomoko]

Iterambere rya tereviziyo mu gihugu cyu Buyapani ryatangiye mu 1972, [4] hakurikiraho itangazwa rya sisitemu ya mbere y’itumanaho ku isi ( Ceefax ) na BBC mu Bwongereza.

Kubera ko inyuguti z'Abayapani zitandukanye cyane n’inyuguti zo mu Burengerazuba, Ubuyapani bwakomeje gukora ubushakashatsi no gucukumbure mu buryo bwo guteza imbere uburyo bwihariye bwo kohereza bwitwa "uburyo bw'icyitegererezo", [5] bwohereza ibimenyetso byo gusikana bisa na fax, ku kigero cyikubye inshuro 20 kurenza uburyo buriho, ariko bisaba generator y'inyuguti ifite nini (icyo gihe) 1- megabit ROM . Ubu buryo bwakoreshejwe mu 1982.

Ibisobanuro

[Hindura | hindura inkomoko]

Mubimenyetso bisanzwe bya NTSC, hariho imirongo 525 yo gusikana ibimenyetso byo muburyo bw'amashusho. Ibi bigabanijwemo kabiri amashusho, azwi nka " imirima ", yoherejwe buri 60th yisegonda. Aya mashusho ahuza kuri ecran cyangwa se akaranga mashusho, no mumaso, kugirango akore ikadiri imwe ya videwo ivugururwa buri 30 ya segonda. Buri murongo wa buri murima ufata 63.5 μs kohereza; 50.3 μs za videwo na 13.2 μs zingana n "igihe cyapfuye" kuri buri mpera yakoreshejwe mu kwerekana televiziyo ko umurongo wuzuye, uzwi nka intera itambitse (HBI). Iyo gahunda yo gusikana igeze kumpera ya ecran isubira hejuru mugihe cyahagaritse intera ihagaritse (VBI), nka, HBI isaba "igihe cyapfuye" kugirango ikore neza ibimenyetso kuri ecran. Muri iki kibazo, igihe cyapfuye kigaragazwa nimirongo idakoreshwa yikimenyetso cyamashusho, mubisanzwe imirongo 22 yambere yikadiri.


JTES ikubiyemo amakuru mubimenyetso byo muburyo bw'amashusho nkurukurikirane rw'ududomo ku gipimo cyagenwe cya 5.727272 Mbit / s. Buri murongo wumurima ufite 50.3 μs yumwanya wa amashusho ushobora gukoreshwa mugukwirakwiza, bivamo 296 bits kumurongo. [1]

Bishoboka guhindura inyuguti zashyizweho ( JIS C 6226 Yinganda zubuyapani, ikubiyemo inyuguti 6879 zishushanyije zikwiye kwandika inyandiko, amazina y’ahantu, amazina bwite, nibindi mu rurimi rwikiyapani, byasobanuwe mu 1978), kugirango ugaragaze inyuguti zikwiye cyangwa uzamura uburyo bwo kohereza. Niba inyuguti itaboneka muri Teletext yakira imashini itanga imashini, irashobora gushirwaho ukoresheje "DRCS" (Dynamically Redefinable Character Sets). [3] [6]

Inyuguti zishobora kwanduzwa nka mozayike yibintu bya semigraphic, hamwe na buri kintu gifite imiterere ya 8 × 12 pigiseli. [6] [7]

Kode nyinshi zamakuru zirashoboka: [8]

  • Mosaic - mozayike ya semigraphic block, bisa nuburyo ibishushanyo bigizwe nizindi sisitemu ya teletext
  • DRCS - yemerera inyuguti zitaboneka kuri generator yimiterere
  • Ifoto imwe-ifotora - itanga amakuru yishusho (pigiseli, umubare muto wamabara) aho guhagarika, gahoro gahoro
  • Amafoto menshi-yohereza amashusho - yohereza amashusho cyangwa animasiyo numubare munini wamabara, gahoro cyane
  • Geometrike - itanga amashusho kuva kumurongo, arcs, urukiramende na polygon. Bisa na NABTS teletext.

Urutonde rwa Serivisi za Teletext Yabayapani

[Hindura | hindura inkomoko]
  • Antiope - Igipimo cyitumanaho cyigifaransa (CCIR Teletext Sisitemu A)
  • NABTS - Amajyaruguru ya Amerika Yerekana Itumanaho (CCIR Teletext Sisitemu C)
  • CAPTAIN - Sisitemu ya videotex yubuyapani yakozwe na NTT
  • NAPLPS - Syntax ya Amerika y'Amajyaruguru Yerekana Urwego
  • Amashusho yerekana amashusho
  • Inyandiko isobanura

Amashakiro

[Hindura | hindura inkomoko]
  1. ↑ 1.0 1.1 1.2 Recommendation ITU-R BT.653-3 (02/1998) Teletext systems (PDF). ITU. 2011.
  2. ↑ "EIA516 NABTS MODULE - NABTS DATA BROADCAST SOFTWARE FOR NORPAK ENCODER PLATFORMS". Norpak Corporation. October 10, 2006. Archived from the original on 10 October 2006.
  3. ↑ 3.0 3.1 "DBNSTJ : Teletext for Japan". Database on Noteworthy Contributions for Science and Technology (Japan). Archived from the original on 2 December 2021. Retrieved 24 January 2023.
  4. ↑ "テレビ文字多重放送の研究開発を振り返って". 映像情報メディア学会誌 (in Ikiyapani). Vol. 65, no. 7. 2011. pp. 907–911.
  5. ↑ Bens, E. de; Knoche, Manfred (December 6, 2012). Electronic Mass Media in Europe. Prospects and Developments: A Report from the FAST Programme of the Commission of the European Communities. Springer Science & Business Media. p. 519. ISBN 9789400939493 – via Google Books.
  6. ↑ 6.0 6.1 "(a) Character code set". Ddnst.nii.ac.jp. Archived from the original (PNG) on 2 December 2021. Retrieved 12 February 2022.
  7. ↑ "Characters". Ddnst.nii.ac.jp. Archived from the original (PNG) on 2 December 2021. Retrieved 12 February 2022.
  8. ↑ "Coding table". Ddnst.nii.ac.jp. Archived from the original (PNG) on 2 December 2021. Retrieved 12 February 2022.
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