Kini Ipanu Ainipadanu?<\/h3>\n
Imukuro ti ko ni ipadanu dinku iw\u1ecdn faili nipas\u1eb9 idamo ati imukuro ap\u1ecdju i\u1e63iro laisi yiy\u1ecd alaye eyikeyi kuro. Nigbati idinku, faili naa j\u1eb9 aami-bit-fun-bit si atil\u1eb9ba, laisi ipadanu rara ni didara tabi iduro\u1e63in\u1e63in data.<\/p>\n <\/div>\n <\/div>\n \n
Bawo ni Ipanu Ainipa\u1e63e N\u1e63i\u1e63\u1eb9<\/h3>\n
Aw\u1ecdn algoridimu funmorawon ti ko ni ipadanu lo \u1ecdp\u1ecdl\u1ecdp\u1ecd aw\u1ecdn ilana lati dinku iw\u1ecdn faili lakoko \u1e63i\u1e63e aridaju atunk\u1ecd pipe ti data atil\u1eb9ba. Aw\u1ecdn \u1ecdna w\u1ecdnyi \u1e63e itupal\u1eb9 aw\u1ecdn ilana, aw\u1ecdn igbohunsaf\u1eb9f\u1eb9, ati aw\u1ecdn \u1eb9ya laarin data lati fi koodu sii daradara siwaju sii laisi sis\u1ecdnu alaye.<\/p>\n \n
\u1e62i\u1e63e koodu-ipari (RLE)<\/h4>\n
RLE r\u1ecdpo aw\u1ecdn ilana ti aw\u1ecdn eroja data kanna (aw\u1ecdn n\u1e63i\u1e63\u1eb9) p\u1eb9lu iye kan ati kika. Fun ap\u1eb9\u1eb9r\u1eb9, “AAAAAABBBCCCCC” di “6A3B5C”, significantly atehinwa iw\u1ecdn fun data p\u1eb9lu \u1ecdp\u1ecdl\u1ecdp\u1ecd aw\u1ecdn leralera.<\/p>\n
Original: WWWWWWWWWWBBBWWWWWWWWWWWWBBBWWWWWWWWWW\nCompressed: 10W3B12W3B10W<\/pre>\n <\/div>\n <\/div>\n \n\n\n <\/i>\n <\/div>\nIfaminsi Huffman<\/h4>\n
Ilana yii n fi aw\u1ecdn koodu gigun-iyipada si aw\u1ecdn kik\u1ecd kik\u1ecd sii, p\u1eb9lu aw\u1ecdn koodu kukuru fun aw\u1ecdn ohun kik\u1ecd loorekoore. \u1eccna i\u1e63iro yii \u1e63e i\u1e63apeye fifi koodu da lori pinpin ipo igbohunsaf\u1eb9f\u1eb9 ihuwasi.<\/p>\n
\n Apeere:<\/strong>\nFrequent character 'e': 101\nLess frequent 'z': 1010101011<\/pre>\n <\/div>\n <\/div>\n \n\n\n <\/i>\n <\/div>\nAw\u1ecdn alugoridimu LZ77 & LZ78<\/h4>\n
Aw\u1ecdn \u1ecdna ti o da lori iwe-itum\u1ecd-itum\u1ecd yi r\u1ecdpo aw\u1ecdn i\u1e63\u1eb9l\u1eb9 leralera ti data p\u1eb9lu aw\u1ecdn it\u1ecdkasi \u1eb9da \u1eb9y\u1ecdkan ti o ti wa t\u1eb9l\u1eb9 ninu \u1e63i\u1e63an aif\u1ecdw\u1ecdsi. W\u1ecdn \u1e63e ipil\u1eb9 fun aw\u1ecdn \u1ecdna kika olokiki bi ZIP ati GIF.<\/p>\n
\n Apeere:<\/strong>\nInstead of storing \"compression compression\"\nStore \"compression [pointer to earlier instance]\"<\/pre>\n <\/div>\n <\/div>\n \n\n\n <\/i>\n <\/div>\nDeflate alugoridimu<\/h4>\n
Apap\u1ecd LZ77 ati Huffman ifaminsi, Deflate pese funmorawon to dara jul\u1ecd p\u1eb9lu iyara to dara. O nlo ni ZIP, PNG, ati HTTP funmorawon (gzip), ti o j\u1eb9 ki o j\u1eb9 \u1ecdkan ninu aw\u1ecdn algoridimu ti a fi rans\u1eb9 jul\u1ecd jul\u1ecd.<\/p>\n
\n Aw\u1ecdn ohun elo:<\/strong>\n\n
- Aw\u1ecdn ibi ipam\u1ecd ZIP<\/li>\n
- Aw\u1ecdn aworan PNG<\/li>\n
- HTTP funmorawon (gzip)<\/li>\n <\/ul>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nIfaminsi I\u1e63iro<\/h4>\n
Ilana yii \u1e63e a\u1e63oju ifiran\u1e63\u1eb9 kan g\u1eb9g\u1eb9bi sakani ti aw\u1ecdn n\u1ecdmba laarin 0 ati 1. O le \u1e63e a\u1e63ey\u1ecdri aw\u1ecdn iw\u1ecdn funmorawon ti o sunm\u1ecd opin entropy im\u1ecd-jinl\u1eb9, ti o j\u1eb9 ki o munadoko pup\u1ecd fun aw\u1ecdn iru data kan.<\/p>\n
\n Anfani:<\/strong>\nLe \u1e63e koodu koodu ida aw\u1ecdn die-die fun aami, ti o funni ni funmorawon to dara ju Huffman fun \u1ecdp\u1ecdl\u1ecdp\u1ecd aw\u1ecdn orisun.<\/p>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nDelta kooduopo<\/h4>\n
Dipo fifipam\u1ecd aw\u1ecdn iye pipe, fifi koodu delta t\u1ecdju aw\u1ecdn iyat\u1ecd laarin aw\u1ecdn iye it\u1eb9lera. Eyi j\u1eb9 doko pataki fun data nibiti aw\u1ecdn iye to wa nitosi, bii aw\u1ecdn ay\u1eb9wo ohun tabi aw\u1ecdn kika sens\u1ecd.<\/p>\n
\n Apeere:<\/strong>\nOriginal: 105, 107, 106, 110, 108\nDelta: 105, +2, -1, +4, -2<\/pre>\n <\/div>\n <\/div>\n <\/div>\n \nAw\u1ecdn \u1ecdna kika faili Lossless ti o w\u1ecdp\u1ecd<\/h3>\n
\n\n\n <\/i>\nAw\u1ecdn ile ifipam\u1ecd<\/h4>\n <\/div>\n
\nZIP<\/div>\nRAR<\/div>\n7Z<\/div>\nGZIP<\/div>\nBZIP2<\/div>\nTAR<\/div>\n <\/div>\n <\/div>\n \n\n\n <\/i>\nAw\u1ecdn aworan<\/h4>\n <\/div>\n
\nPNG<\/div>\nTIFF<\/div>\nBMP<\/div>\nGIF<\/div>\nWebP (aini pipadanu)<\/div>\n <\/div>\n <\/div>\n \n\n\n <\/i>\nOhun<\/h4>\n <\/div>\n
\nFLAC<\/div>\nALAC<\/div>\nWAV<\/div>\nAPE<\/div>\nWavPack<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n \n \n\n As\u1ecdye funmorawon<\/h2>\n \n
\n\n\n <\/i>\n <\/div>\n\nKini Ipanu Ipanu?<\/h3>\n
Imukuro pipadanu n dinku iw\u1ecdn faili nipa yiy\u1ecdkuro alaye kan patapata, paapaa lai\u1e63e tabi data pataki ti oye. Faili idinku yat\u1ecd si atil\u1eb9ba, \u1e63ugb\u1ecdn aw\u1ecdn iyat\u1ecd ti \u1e63e ap\u1eb9r\u1eb9 lati nira tabi ko \u1e63ee \u1e63e fun eniyan lati rii lab\u1eb9 aw\u1ecdn ipo deede.<\/p>\n <\/div>\n <\/div>\n \n
Bawo ni Lossy funmorawon N\u1e63i\u1e63\u1eb9<\/h3>\n
Imukuro pipadanu n \u1e63a\u1e63ey\u1ecdri aw\u1ecdn ipin funmorawon ti o ga pup\u1ecd nipa \u1e63i\u1e63e aw\u1ecdn ipinnu ilana nipa iru data lati s\u1ecdn\u00f9. Aw\u1ecdn algoridimu w\u1ecdnyi lo im\u1ecd nipa iwoye eniyan-ohun ti oju ati eti wa le ati ko le rii-lati y\u1ecd alaye kuro ni aw\u1ecdn \u1ecdna ti o dinku ipa akiyesi lori didara.<\/p>\n \n
\n\n\n <\/i>\n <\/div>\nIfaminsi yipada<\/h4>\n
Ilana yii yi data pada lati agbegbe kan (bii aaye) si omiran (bii igbohunsaf\u1eb9f\u1eb9) nibiti funmorawon le ti lo daradara siwaju sii. Iyipada Cosine Discrete (DCT) ti a lo ninu JPEG j\u1eb9 ap\u1eb9\u1eb9r\u1eb9 ak\u1ecdk\u1ecd.<\/p>\n
\n Ilana:<\/strong>\n\n
- \u1e62e iyipada aw\u1ecdn bul\u1ecd\u1ecdki aworan si aw\u1ecdn paati igbohunsaf\u1eb9f\u1eb9<\/li>\n
- \u1e62e iw\u1ecdn aw\u1ecdn paati igbohunsaf\u1eb9f\u1eb9-giga di\u1eb9 sii ni ibinu<\/li>\n
- Aw\u1ecdn oju eniyan ko ni itara si aw\u1ecdn igbohunsaf\u1eb9f\u1eb9 w\u1ecdnyi<\/li>\n <\/ul>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nQuantization<\/h4>\n
Quantization din aw\u1ecdn konge ti data iye. O maapu titobi aw\u1ecdn iye tit\u1eb9 sii si eto ti o kere ju ti aw\u1ecdn iye i\u1e63el\u1ecdp\u1ecd, ni imunadoko idinku n\u1ecdmba aw\u1ecdn iw\u1ecdn ti o nilo lati \u1e63e a\u1e63oju data naa.<\/p>\n
\n Apeere:<\/strong>\nOriginal values: 4.13, 4.28, 4.97, 4.02\nQuantized to: 4, 4, 5, 4<\/pre>\n <\/div>\n <\/div>\n \n\n\n <\/i>\n <\/div>\nAwo\u1e63e Psychoacoustic<\/h4>\n
Ti a lo ninu funmorawon ohun, ilana yii lo aw\u1ecdn aropin ti igb\u1ecdran eniyan. O \u1e63e idanim\u1ecd iru aw\u1ecdn paati ohun afetigb\u1ecd ti o le y\u1ecdkuro laisi ni ipa lori didara ohun ti o rii.<\/p>\n
\n Aw\u1ecdn im\u1ecdran b\u1ecdtini:<\/strong>\n\n
- Boju-boju ti igb\u1ecdran: Aw\u1ecdn ohun ariwo boju boju aw\u1ecdn ohun idak\u1eb9j\u1eb9<\/li>\n
- Ifam\u1ecd igbohunsaf\u1eb9f\u1eb9: Aw\u1ecdn eniyan gb\u1ecd aw\u1ecdn igbohunsaf\u1eb9f\u1eb9 aarin-aarin dara jul\u1ecd<\/li>\n
- Iboju akoko: Aw\u1ecdn ohun le boju-boju aw\u1ecdn miiran ti o waye ni kete \u1e63aaju\/l\u1eb9hin<\/li>\n <\/ul>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nIfaminsi Iro<\/h4>\n
Iru si aw\u1ecdn awo\u1e63e psychoacoustic \u1e63ugb\u1ecdn fun data wiwo, \u1ecdna yii n y\u1ecd alaye kuro ti aw\u1ecdn oju eniyan ko \u1e63ee\u1e63e lati \u1e63e akiyesi, paapaa ni aw\u1ecdn alaye igbohunsaf\u1eb9f\u1eb9 giga ati aw\u1ecdn iyat\u1ecd aw\u1ecd.<\/p>\n
\n Aw\u1ecdn ohun elo:<\/strong>\nTi a lo ninu JPEG, MPEG, ati aw\u1ecdn ajohun\u0161e funmorawon wiwo miiran lati \u1e63e pataki data pataki oye.<\/p>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nBiinu i\u0161ipopada<\/h4>\n
Ilana funmorawon fidio ti o lo ilokulo igba di\u1eb9 nipa fifi koodu pam\u1ecd laarin aw\u1ecdn fireemu dipo fireemu pipe k\u1ecd\u1ecdkan. Aw\u1ecdn iyipada nikan lati fireemu kan si ekeji ni koodu ni kikun.<\/p>\n
\n Ilana:<\/strong>\n\n
- T\u1ecdju pipe “keyframes” (I-fireemu) lorekore<\/li>\n
- Fun aw\u1ecdn fireemu miiran, t\u1ecdju aw\u1ecdn iyat\u1ecd nikan (P-fireemu) tabi iyat\u1ecd bidirectional (B-fireemu)<\/li>\n
- Aw\u1ecdn abajade idinku iw\u1ecdn faili iyal\u1eb9nu fun fidio<\/li>\n <\/ul>\n <\/div>\n <\/div>\n \n
\n\n <\/i>\n <\/div>\nChroma Subsampling<\/h4>\n
Ilana yii dinku alaye aw\u1ecd di\u1eb9 sii ju alaye im\u1ecdl\u1eb9 l\u1ecd, ni anfani ti ifam\u1ecdra nla ti oju eniyan si itanna ju aw\u1ecdn iyat\u1ecd aw\u1ecd l\u1ecd.<\/p>\n
\n Aw\u1ecdn \u1ecdna kika ti o w\u1ecdp\u1ecd:<\/strong>\n\n
- 4: 4: 4 – Ko si i\u1e63ap\u1eb9r\u1eb9 (aw\u1ecd kikun)<\/li>\n
- 4: 2: 2 – Halves petele aw\u1ecd ipinnu<\/li>\n
- 4: 2: 0 – Halves mejeeji petele ati inaro aw\u1ecd ipinnu<\/li>\n <\/ul>\n <\/div>\n <\/div>\n <\/div>\n \n
Aw\u1ecdn \u1ecdna kika Faili Lossy w\u1ecdp\u1ecd<\/h3>\n
\n\n\n <\/i>\nAw\u1ecdn aworan<\/h4>\n <\/div>\n
\nJPEG<\/div>\nW\u1eb9\u1eb9bu (asonu)<\/div>\nJPEG 2000<\/div>\nHEIF<\/div>\nAVIF<\/div>\n <\/div>\n <\/div>\n \n\n\n <\/i>\nOhun<\/h4>\n <\/div>\n
\nMP3<\/div>\nAAC<\/div>\nVorbis<\/div>\nOpus<\/div>\nWMA<\/div>\n <\/div>\n <\/div>\n \n\n\n <\/i>\nFidio<\/h4>\n <\/div>\n
\nH.264<\/div>\nH.265<\/div>\nVP9<\/div>\nAV1<\/div>\nWebM<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n \n \n\n Aw\u1ecdn ohun elo ti o wulo ati Aw\u1ecdn \u1ecdran Lo<\/h2>\n \n
\n\n\n\n <\/i>\n <\/div>\nDigital Photography<\/h3>\n <\/div>\n
\nAini ipadanu<\/h4>\n
\n
- It\u1ecdju \u1ecdna kika RAW fun aw\u1ecdn oluyaworan \u1ecdj\u1ecdgb\u1ecdn<\/li>\n
- Ibi ipam\u1ecd didara-pamosi ti aw\u1ecdn f\u1ecdto pataki<\/li>\n
- Aw\u1ecdn aworan ti o nilo i\u1e63\u1eb9-ifiweran\u1e63\u1eb9 nla tabi \u1e63i\u1e63atun\u1e63e<\/li>\n
- PNG kika fun aw\u1ecdn eya p\u1eb9lu \u1ecdr\u1ecd tabi eti to muu<\/li>\n <\/ul>\n \n
Ibanuj\u1eb9 Apadanu<\/h4>\n
\n
- JPEG fun aw\u1ecdn f\u1ecdto lojoojum\u1ecd ati pinpin w\u1eb9\u1eb9bu<\/li>\n
- Iran eekanna atanpako fun aw\u1ecdn \u00e0w\u00f2r\u00e1n ati aw\u1ecdn awot\u1eb9l\u1eb9<\/li>\n
- Awuj\u1ecd media \u00ecr\u00f9s\u00f3k\u00e8 ibi ti iw\u1ecdn ifilel\u1eb9 l\u1ecd waye<\/li>\n
- Aw\u1ecdn asom\u1ecd imeeli ati aw\u1ecdn ohun elo fifiran\u1e63\u1eb9<\/li>\n <\/ul>\n \n
\n I\u1e63e Ti o dara jul\u1ecd:<\/strong> Yaworan ni RAW tabi \u1ecdna kika ti ko padanu, \u1e63\u1eb9da aw\u1ecdn \u1eb9ya adanu fun pinpin, t\u1ecdju aw\u1ecdn oluwa ti ko ni ipadanu fun fifipam\u1ecd.\n <\/div>\n <\/div>\n <\/div>\n \n\n\n\n <\/i>\n <\/div>\n