Tsanangura muchidimbu kuti I frames, B frames, uye P frames chii?
Context:Mumunda wevhidhiyo compression vhidhiyo furemu inomanikidzwa uchishandisa akasiyana maalgorithms ane akasiyana mabhenefiti uye zvakashata, zvakatenderedza zvakanyanya huwandu hwekumanikidza kwedata. Aya magadzirirwo akasiyana-siyana emafirimu evhidhiyo anonzi marudzi emifananidzo kana marudzi emafirimu. Mhando nhatu huru dzemifananidzo dzinoshandiswa mumavhidhiyo akasiyana-siyana ndiI, P uye B. Ivo vakasiyana mune zvinotevera zvinotevera:  I-frame ndiyo isinganyanyi kupwanyika asi haidi mamwe mafuremu evhidhiyo kuti ishandiswe. P-mapuranga anogona kushandisa mashoko kubva yapfuura mafuremu kuti decompress uye vari zvikuru compressible pane I-mapuranga. B-mapuranga anogona kushandisa zvose yapfuura uye mberi mafuremu nokuda date bhuku kuwana mukuru uwandu date compression.  Mhando nhatu dzemifananidzo (kana kuti mafuremu) dzinoshandiswa mukumanikidzwa kwevhidhiyo: I, P, uye B mafuremu.  I-frame (mufananidzo wakanyorwa mukati) mufananidzo wakakwana, wakafanana neJPG kana BMP faira remufananidzo.  P-frame (Predicted picture) inochengeta bedzi chinjo dziri mumufananidzo kubva mufuremu yapfuura. Somuenzaniso, muchiitiko umo motokari inofamba ichipfuura nepamashure pakamira, kufamba kwemotokari bedzi kunoda kunyorwa. Iyo encoder haidi kuchengeta ma pixel asingachinji emashure muP-frame, nokudaro ichichengetedza nzvimbo. P-frame inozivikanwawo se delta-frame.  B-frame (Bidirectional predicted picture) inochengetedza kunyange nzvimbo yakawanda nokushandisa misiyano iri pakati pechimiro chiripo uye zvose zviri zviviri zvakapfuura uye zvinotevera zvigadziro kuti zvitsanangure zviri mukati mazvo.  P neB mafuremu anonziwo Inter mafuremu. Kurongeka kwakarongwa mufuremu I, P uye B kunonzi Boka remifananidzo.
I mafuremu, B mafuremu, uye P mafuremu mavhidhiyo mafuremu mhando anoshandiswa mavhidhiyo codecs. I mafuremu anogona kududzirwa pasina kunongedzera kune mamwe mafuremu. Inorondedzera pachayo mufananidzo mumwe chete wevhidhiyo yacho. P mafuremu uye B mafuremu kune rumwe rutivi anoreva mamwe mafuremu uye anofanira kududzirwa mushure mekunge mafuremu avanotaura nawo adziviswa. P mafuremu anongotaura mafuremu kubva pakutanga muvhidhiyo nepo B mafuremu anogona kutaura mafuremu kubva pakutanga kana gare gare. Nokudaro kududzira mafuremu eB kunoda kududzira mafuremu evhidhiyo mumutsara wakasiyana nemutsara wokuridza.