
chenn-hoow encoding

dasaamsha akkangalkkayulla bainari encodinginte memory kaaryakshamamaya ithara samvidaanamaanu chenn-hoow encoding.
bainari-coode cheytha dasaamsham (bcd) ennariyappedunna dasaamsha akkangalkkayulla bainari encodinginte parambaraagatha samvidaanam, oro akkavum encode cheyyaan naalu bittukal upayogikkunnu, ithu bainari daatta bandwidth ganyamaayi paazhaakkunnu (naalu bittukalkk 16 avasthakal sambharikkaan kazhiyumennathinaal 10 maathram sambharikkaan upayogikkunnu), paaykk cheytha bcd upayogikkumbol polum.
encoding rund dasaamsha akkangalude (100 avasthakal) sambharana aavasyakathakal 8 ll ninnu 7 bittukalaayum moonnu dasaamsha akkangalude (1000 avasthakal) sambharana aavasyakathakal 12 ll ninnu 10 bittukalaayum lalithamaaya booliyan parivartthanangal maathram upayogichu oru adisthaana parivartthanam polulla sankeernamaaya ganitha pravartthanangal ozhivaakkunnu.
charithram.
onniladhikam kandethalukalayi thonnunna, pinneedu chenn-hoow encoding ennariyappettathinu pinnile chila ashayangal theodor emm swathanthramaayi vikasippicheduthu. 1969ll hearts, 1971ll tian chii chenn (1928-) ennivar chernnu.
rockwellinte hearts 1969-ll addehathinte encodinginaayi oru pettant phayal cheyyukayum athu 1971-ll anuvadikkukayum cheythu.
1971ll irving tse hoow () (1921-2003) yumayi chenn aadyamaayi thante ashayangal charcha cheythu. chenum hoyum vyathyastha sthalangalil aayirunnengilum akkaalat ibminu vendi pravarthikkukayaayirunnu. thante sidhaanthangalude phalangal swathanthramaayi parisodhikkaan chenn frank chiin tangumaayi koodiyaalochichu. 1973ll aii. bii. emm avarude peril oru pettant phayal cheythu, athu 1974ll anuvadichu. kuranjathu 1973 aayappozhekkum, hertsinte munkaala srishtikal avarkk ariyamaayirunnirikkanam, kaaranam pettant addehathinte pettant munkaala kalayayi udharikkunnu.
joseph dii. yill ninnulla inputt. rutlej joonn sii. chenn-hoow encodinginte avasana pathippaya mcferson 1974 ll ibmil vitharanam cheyyukayum 1975 ll "communications oof dhii acm" enna jenalil prasidheekarikkukayum cheythu. eee pathippil praadhamikamaayi encoding sisttathinte prayogavumaayi bandhapetta niravadhi parishkkaranangal ulppedunnu. ithu huffman polulla prefix coode ulkkollunnu.
1975ll "chenn aandu hoow 's skeem" ennum 1982ll "chenz encoding" ennum paraamarsikkappetta eee encoding 2000 muthal "chenn-hoow encoding" allengil "chenn-hoow algoritam" ennariyappettu. 2001ll pettant phayal cheytha sesham maikkal eph. kaulisho 2002-ll "aii. iii. iii. nadapadikramangal-computerukalum digital saankethikavidyakalum" ennathil sensity piked desimal (dii. pii. dii) encoding ennariyappedunna chenn-hoow encodinginte kooduthal parishkkaranam prasidheekarichu. dii. pii. dii pinneedu aii. iii. iii. iii <aii. dii1>, floating-pooyint staanderdukalil upayogikkunna "desimal encoding" aayi sweekarikkappettu.
apeksha.
poojyathil ninnu ezhu vareyulla akkangal anubandha okdal grouppinte moonnu bainari akkangal upayogichu encode cheythathaanennu chenn abhiprayappettu. ettum onpathum akkangalk vyathyasthamaaya encoding thirichariyaan oraalkk oru flag upayogikkaamennum athu orotta bitt upayogichu encode cheyyumennum addeham abhiprayappettu.
praayogikamaayi, inputt bittukalude streamilake booliyan parivartthanangalude oru parambara prayogikkunnu, bcd encode cheytha akkangal moonnu akkangalil 12 bittukalil ninnu moonnu akkangalil 10 bittukalayi compress cheiyunnu. thathfalamaayundaakunna coode cheytha stream bcdyilekku decode cheyyaan reversed transformations upayogikkunnu. oru lookup table upayogikkunnathiloodeyum thulyamaaya phalangal nedaanaakum.
chenn-hoow encoding moonnu dasaamsha akkangalude settukale 10 bittukalude ("deklattukal" ennu vilikkappedunna) grouppukalaayi encoding cheiyunnathil parimithappedutthiyirikku. 10 bittukal upayogichu saadhyamaaya 1024 samsthaanangalil, ithu 24 samsthaanangal maathrame upayogikkaathe avasheshikkunnulloo (dond cair bittukal saadhaaranayaayi ezhuthunna samayat 0 aayi sajjeekarikkukayum vaayikkumbol avaganikkappedukayum cheiyunnu). 0.34% paazhaakkiyaal maathram ithu 4 bittukalil oru akkamulla bcdyekkaal 20 sathamaanam kooduthal kaaryakshamamaya encoding nalkunnu.
rund dasaamsha akkangalude (bcdyil 8 bittukal aavasyamaanu) settukal 7 bittukalude grouppukalaayi compress cheiyunnathinu hearts chenum samanamaaya, ennaal kaaryakshamamallatha, encoding skeemukal nirddeshichu.
valia dasaamsha akkangale moonnum randum akka grouppukalaayi thirikkam.
eph polulla 8-4-2-1 bcd allatha mattethenkilum dasaamsha kodukalil encode cheytha akkangalumayi skeem poruthappedutthaanulla saadhyathayum pettantukal charcha cheiyunnu.iii. adhika-3, adhika-6, jump-attu-2, jump-attu-8, gray, glixon, oo 'bryan type-aii, gray-stibits coode. ithe thathwangal mattu adisthaanangalilum prayogikkaam.
1973ll ibm sisttam/370 model 165,370 model 168 computerukalkkaayulla ibm 7070/7074 emulation savisheshathayude vilasa parivartthana hardwareil chila tharatthilulla chenn-hoow encoding upayogichathayi thonnunnu.
oru pramukha aaplikkeshan moonnu akka eksponantulla 33 dasaamsha akkangal sambharikkunnathin 128-bitt rajisttar upayogikkunnu, ithu bainari encoding upayogichu nedaan kazhiyunnathil kurayaathathaanu (athesamayam bcd encodinginu athe akkangal sambharikkunnathin 144 bittukal aavasyamaanu).

