JTES

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.  

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.  

 Amateka 
Iterambere rya tereviziyo mu gihugu cyu Buyapani ryatangiye mu 1972,  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",  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 
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. 

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).  

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

Kode nyinshi zamakuru zirashoboka: 

 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 

 Telemo Yapani ( NHK )
 TV Asahi Icyerekezo ( TV Asahi ) (7 Mata 1986 - 24 Nyakanga 2011)
 AXES4 ( Nippon TV ) (1985 - 31 Werurwe 2007)
 Icyerekezo cya Tokiyo ( TBS )
 Fuji TV
 Televiziyo ya Metropolitani
 Nikkei Telepress ( TV Tokiyo )

 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