
deferential pulse-coode modulation

deferential pulse-coode modulation (dpcm) pulse-coode modulation (pcm) adisthaanarekha upayogikkunna oru signal encoderaanu, ennaal signalinte saambilukalude pravachanatthe adisthaanamaakki chila pravartthanangal cherkkunnu. inputt oru analog signalo digital signalo aakam.
inputt oru thudarchayaaya-samaya analog signalaanengil, athu aadyam sample cheyyendathundu, angane oru discreet-time signal dpcm encoderilekkulla inputtaanu.
eee rund prakriyakalilonnu prayogikkumbol, signalinte hraswakaala aavarthanam (aduthulla moolyangalude positteev parasparabandham) illaathaakkunnu; vyathyaasangal pinneedu entropy coode cheythaal 2 muthal 4 vareyulla kramatthile compression anupathangal nedaan kazhiyum, kaaranam deference signalinte entropy swatantra saambilukalaayi kanakkaakkunna yadhaartha vyathiriktha signalinekkaal valare cheruthaanu.
sii aanu dpcm kandupidichathu. 1950-ll bell laabukalile chaappin cuttler; addehathinte pettantil rund reethikalum ulppedunnu.
oopshan 1: thudarchayaayi rund alakkunna saambilukal thammilulla vyathyasam.
encoder deferentiationte pravartthanam nirvahikkunnu; aduthulla quandise cheytha saambilukalude vyathyaasathin munbu oru quandiser; decoder oru acumulatoraanu, ithu shariyaayi aarambhikkukayaanenkil quandise cheytha signal krithyamaayi veendedukkunnu.
oopshan 2: synthesis vazhi vishakalanam cheyyuka.
reseaveril oru ekadesha vipareeta quandiser uchithamayi upayogikkunnidatholam kaalam encoderinullil decoder ulppeduthunnathu nonleeniyar quandisation ulppedeyulla vyathyaasangalude alavu anuvadikkunnu. quandiser ekeekrithamaakumbol, cuttler kaanicha eee lalithamaaya rekhaachithrathil kaanichathupole decoder vyathyaasangal parokshamaayi punarujjeevippikkunnu

