nasir ahmed (engineer)

nasir ahmed (janm 1940 bangalore, bhaarat mein) ack bhaaratiya-americi vidyut abhiyanta aur computer vaigyaanik hain. way nyu maxico vishvavidyalaya (aim. aine. aim.) mein electrical aur computer engineering key maanad professor hain. way 1970 key dashak kii shuruat mein asatat cosine parivartan (dee. see. tii.) key aavishkaar key liye jaane jaate hain. dee. see. tii. sabse vyaapak roop seey upayog kiya jaane vaalaa detta sampeedan parivartan haye, joe adhikansh digital media manakon (chhavi, video aur audio) key liye aadhar haye aur aamtaur parr digital signal prasanskaran mein upayog kiya jaataa haye. unhone discreet saain transform (dst) kaa bhee varnan kiya, joe dee. see. tii. seey sambandhit haye.
asatat cosine parivartan (dee. see. tii.).
discreet cosine transform (dee. see. tii.) ack haani sampeedan algorithm haye jisaki kalpana pahali baar ahmed dwara kansas raajya vishvavidyalaya mein kaam karate samay kii gaee thee, aur unhone 1972 mein rashtriya vigyaan foundation koo takneek kaa prastaav diyaa thaa. unhone mool roop seey chhavi sampeedan key liye dee. see. tii. kaa irada kiya thaa. ahmed ney apane phd chhaatr tii key saath ack kaaryasheel dee. tii. tii. algorithm vikasit kiya. natarajan aur dost key. aar. 1973 mein raav, aur unhone janwari 1974 key ack pepper mein apane parinam prastut kiye. yeh varnit kartaa haye jise abb prakaar-III dct (dct-iii) kahaa jaataa haye, saath hii isake vyutkram, prakaar-III dct (a.key.aeye. aaee. dee. tii.).
ahmed benchmark prakaashan, "discreet cosine transform" (tii key saath) key pramukh lekhak they. natarajan aur key. aar. raav), jise isake prakaashan key baad seey kaee karyon mein ack maulik vikas key roop mein uddhrit kiya gayaa haye. dee. see. tii. key vikas key liye buniyaadi shodh kaary aur ghatnaaon koo baad mein ahmed dwara "main kaise asatat cosine parivartan key saath aaya" sheershak seey ack prakaashan mein sankshep mein prastut kiya gayaa thaa.
dee. see. tii. kaa vyaapak roop seey digital chhavi sampeedan key liye upayog kiya jaataa haye. yeh 1992 jey. pee. ee. jee. chhavi sampeedan praudyogiki kaa ack mukhya ghatak haye jise jey. pee. ee. jee. visheshagya samooh kaary samooh dwara vikasit kiya gayaa haye aur ise sanyukt roop seey aaee. tii. yuu., aaee. aiss. oh. aur aaee. ee. see. dwara maankeekrit kiya gayaa haye. aaee. tii. yuu. aur aim. pee. ee. jee. (chalati tasveer visheshagya samooh) dwara paribhaashit vibhinn antarrashtriya manakon mein digital "video" sampeedan praapt karane key liye iska upayog kaise kiya jaataa haye, iss parr ack tutorial charcha key dwara ack pepper mein upalabdh haye. aar. raav aur jey. jey. hwang joe 1996 mein prakaashit huaa thaa, aur yaao wang dwara dou 2006 prakashanon mein ack avalokan prastut kiya gayaa thaa. dee. see. tii. key chhavi aur video sampeedan gunon key parinamswarup yeh nimnalikhit vyaapak roop seey upayog kii jaane vaali antarrashtriya maanak praudyogikiyon kaa ack abhinn ghatak bunn gayaah
sanket sampeedan anuprayogon mein upayog kiye jaane vaale dee. tii. tii. key roop koo kabhi-kabhi asatat cosine parivartanon key parivaar key sandarbh mein "dee. tii.-2" yaa "dee. tii.-3" key roop mein sandarbhit kiya jaataa haye.
haal key manakon mein purnank-adharit parivartanon kaa upayog kiya gayaa haye jinamen dee. see. tii. key samaan guna hain lekin spasht roop seey trikonamitiya karyon dwara paribhaashit kiye jaane key bajaay purnank prasanskaran parr adharit hain. inn parivartanon key parinamswarup dee. tii. tii. key samaan samroopata guna hotey hain aur kuchh hudd taka, dee. tii. tii. key sanniktan honey key kaaran, unhein kabhi-kabhi "purnank dee. tii. tii.". parivartan kahaa jaataa haye. iss tarah key parivartanon kaa upayog adhik haal key manakon seey sambandhit nimnalikhit praudyogikiyon mein video sampeedan key liye kiya jaataa haye. purnank dee. see. tii". design avdhaaranaatmak roop seey paaramparik dee. see. tii. key samaan hain, lekin cumm computational jatilata key saath bilkul nirdisht decoding pradaan karane key liye saral hain.
ack dee. see. tii. sanskaran, sanshodhit asatat cosine parivartan (aim. dee. tii. tii.), kaa upayog aadhunik audio sampeedan praarupon jaise kii kii, unnat audio coding (aeye. aeye. see.), aur vorbis (oh. jee. jee.) mein kiya jaataa haye.
discreet saain transform (dst) koo dee. tii. tii. seey "x = 0" parr neuman sthiti koo ack dirichlet sthiti key saath pratisthaapit karke praapt kiya jaataa haye. dst kaa varnan ahmed, natarajan aur raav dwara 1974 key pepper mein kiya gayaa thaa.
ahmed baad mein 1995 mein nyu maxico vishvavidyalaya mein giridhar mandyam aur neeraj magotra key saath ack dee. see. tii. lossless compression algorithm key vikas mein shamil they. yeh dee. see. tii. takneek koo chhaviyon key lossless compression key liye upayog karane kii anumati detaa haye. yeh mool dee. tii. algorithm kaa ack sanshodhan haye, aur isamen vyutkram dee. tii. tii. aur delta modulan key tatva shamil hain. yeh entropy coding kii tulanaa mein adhik prabhaavi haani rahit sampeedan algorithm haye.
lokpriya sanskriti.
aine. bee. see. key "diss ijj ass" key season 5, episode 8 mein, ahmed kii kahani koo aadhunik samaaj mein, vishesh roop seey covid-19 mahamari key dauran, internet parr chhavi aur video prasaran key mahatva koo ujagar karane key liye bataaya gayaa thaa. episode ahmed aur unaki patni kii ack tasveer key saath samaapt hotaa haye, jisamen unake kaam key mahatva koo samajhaane vaale caption hotey hain, aur nirmaataon ney video chait parr dampati seey unaki kahani koo samajhane aur ise episode mein shamil karane key liye baat kii.

