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ghost canceling reference wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 references 2 external links toggle the table of contents ghost canceling reference 2 languages فارسی 日本語 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia analog tv signal component ghost canceling reference gcr is a special sub signal on a television channel that receivers can use to compensate for the ghosting effect of a television signal distorted by multipath propagation between transmitter and receiver in the united states the gcr signal is a chirp in frequency of the modulating signal from 0 hz to 4 2 mhz transmitted during the vertical blanking interval over one video line line 19 in the u s shifted in phase by 180 once per frame with this pattern inverted every four lines television receivers generate their own local versions of this signal and use the comparison between the local and remote signals to tune an adaptive equalizer that removes ghost images on the screen gcr was introduced after its recommendation in 1993 by the advanced television systems committee 1 references edit the museum of broadcast communications encyclopedia of television advanced television systems committee www museum tv archived from the original on 2013 12 25 external links edit official gcr specification v t e video formats television analog 405 lines system a 525 lines system m color systems ntsc ntsc j clear vision pal m b mac 625 lines system b c d g h i k l n color systems pal pal n palplus secam mac 819 lines system e f 1125 lines muse 1250 lines hd mac audio btsc mts eiaj nicam sap sound in syncs zweikanalton a2 igr hidden signals captioning cgms a epg gcr pdc teletext vbi veil vit vitc wss xds historical pre 1940 mechanical television 180 line 343 line 375 line 441 line 455 line 567 line field sequential color system oskm digital interlaced sdtv 480i 576i hdtv 1080i progressive ldtv 1seg 240p 288p edtv 480p 576p hdtv 720p 1080p uhdtv 4k 8k mpeg 2 video atsc dvb dvb 3d tv isdb dtmb abs s avs cmmb avs note 1 dtmb abs s mpeg 4 visual mobaho note 2 mpeg 4 avc atsc a 72 cmmb dmb dtmb dvb sbtvd 1seg mobaho note 2 avs2 note 1 abs s mpeg h hevc atsc 3 0 dvb hd dmb isdb s3 dtmb audio ac 3 5 1 ac 4 dts dra mpeg 1 audio layer ii mpeg multichannel pcm lpcm aac he aac mpeg h 3d audio hidden signals afd broadcast flag captioning cpcm epg teletext 1 2 also used in china s dvb s s2 network 1 2 defunct technical issues 14 9 compromise broadcast safe digital cinema dci display motion blur mpeg transport stream reverse standards conversion standards conversion television transmitter test card video on demand video processing widescreen signaling templates analogue tv topics this article about television technology is a stub you can help wikipedia by adding missing information v t e retrieved from https en wikipedia org w index php title ghost canceling_reference oldid 1213329134 categories television technology television technology stubs hidden categories articles with short description short description matches wikidata all stub articles this page was last edited on 12 march 2024 at 11 13 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents ghost canceling reference 2 languages add topic
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