<prompt> Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu: Passage: NTSC mavara encoding anoshandiswa neSystem M terevhizheni chiratidzo, icho chinosanganisira 301.001 anenge 29.97 akapindirana mafuremu evhidhiyo pasekondi. Chimiro chimwe nechimwe chinoumbwa neminda miviri, imwe neimwe iine mitsara 262.5 yekuongorora, kuti ive nemitsara 525 yekuongorora. Mitsetse yokunzvera 486 inoumba raster inooneka. Zvasara iyo vertical blanking interval inobvumira kuti verticalsynchronization uye retrace. Iyi nguva yekudzima yakatanga kugadzirirwa kungobvisa CRT yemugamuchiri kuti ibvumire iyo yakapfava analogue macircuit uye inononoka kumashure kumashure kwemaTV ekutanga. Zvisinei, mimwe yemitsetse iyi zvino inogona kuva nemamwe mashoko akadai sekunyorwa kwemashoko pasi pemashoko uye nguva yekodhi VITC. Mune raster yakakwana kusaremekedza hafu yemitsetse nekuda kwekupindirana mitsetse yekuongorora ine nhamba yakaenzana imwe neimwe mutsara yaizove kunyange kana ikaverengerwa muvhidhiyo chiratidzo, semuenzaniso 2, 4, 6,..., 524 inotorwa mumunda wekutanga, uye iyo isina kuenzana nhamba imwe neimwe mutsara yaizove isina kuenzana kana ikaverengerwa muvhidhiyo chiratidzo, semuenzaniso 1, 3, 5,..., 525 inotorwa mumunda wechipiri, kupa mufananidzo usina kupenya pamunda wekuvandudza frequency ye601.001 Hz inenge 59.94 Hz. Nokuenzanisa, 576i hurongwa hwakadai PAL-B G uye SECAM kushandisa 625 mitsetse 576 kuoneka, uye saka vane yepamusoro kutwasuka chisarudzo, asi yakaderera nguva chisarudzo 25 mapikicha kana 50 minda por wechipiri. Mubvunzo: CRT TV inodei nguva yokuratidzira yakatwasuka?  <response>: vertical synchronization uye retrace 