{"id":477895,"date":"2023-08-09T09:22:01","date_gmt":"2023-08-09T09:22:01","guid":{"rendered":""},"modified":"2023-09-05T11:15:37","modified_gmt":"2023-09-05T11:15:37","slug":"lossy-compression","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/lossy-compression\/","title":{"rendered":"n\u00e9n t\u1ed5n hao"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>N\u00e9n t\u1ed5n th\u1ea5t l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt quan tr\u1ecdng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ec7p m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ho\u00e0n to\u00e0n ch\u1ea5t l\u01b0\u1ee3ng. N\u00f3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt s\u1ed1 kh\u00e1c nhau, bao g\u1ed3m x\u1eed l\u00fd h\u00ecnh \u1ea3nh v\u00e0 video, truy\u1ec1n ph\u00e1t \u00e2m thanh v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng. Kh\u00e1i ni\u1ec7m n\u00e9n c\u00f3 t\u1ed5n hao \u0111\u00e3 c\u00f3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u00e1y t\u00ednh v\u00e0 \u0111\u00e3 ph\u00e1t tri\u1ec3n \u0111\u00e1ng k\u1ec3 theo th\u1eddi gian. B\u00e0i vi\u1ebft n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch kh\u00e1m ph\u00e1 l\u1ecbch s\u1eed, nguy\u00ean t\u1eafc l\u00e0m vi\u1ec7c, lo\u1ea1i, \u1ee9ng d\u1ee5ng v\u00e0 tri\u1ec3n v\u1ecdng trong t\u01b0\u01a1ng lai c\u1ee7a n\u00e9n c\u00f3 t\u1ed5n hao, \u0111\u1eb7c bi\u1ec7t li\u00ean quan \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 li\u00ean quan c\u1ee7a n\u00f3 v\u1edbi th\u1ebf gi\u1edbi m\u00e1y ch\u1ee7 proxy.<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00e9n t\u1ed5n hao<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00e9n t\u1ed5n hao c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb \u0111\u1ea7u nh\u1eefng n\u0103m 1970 khi c\u00f4ng ngh\u1ec7 k\u1ef9 thu\u1eadt s\u1ed1 b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n. \u0110\u00f3 l\u00e0 th\u1eddi \u0111i\u1ec3m m\u00e0 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef c\u1ee7a m\u00e1y t\u00ednh c\u1ef1c k\u1ef3 h\u1ea1n ch\u1ebf v\u00e0 vi\u1ec7c truy\u1ec1n c\u00e1c t\u1ec7p l\u1edbn qua m\u1ea1ng l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c. \u0110\u1ec3 gi\u1ea3i quy\u1ebft nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u v\u00e0 k\u1ef9 s\u01b0 b\u1eaft \u0111\u1ea7u kh\u00e1m ph\u00e1 nh\u1eefng c\u00e1ch th\u1ec3 hi\u1ec7n d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ed3ng th\u1eddi gi\u1ea3m k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3. Nh\u1eefng \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00e9n t\u1ed5n th\u1ea5t xu\u1ea5t hi\u1ec7n trong c\u00e1c b\u00e0i b\u00e1o h\u1ecdc thu\u1eadt v\u1ec1 x\u1eed l\u00fd t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 n\u00e9n h\u00ecnh \u1ea3nh.<\/p>\n<h2>Kh\u00e1m ph\u00e1 n\u00e9n t\u1ed5n hao<\/h2>\n<p>N\u00e9n lossy, tr\u00e1i ng\u01b0\u1ee3c v\u1edbi n\u00e9n lossless \u0111\u1ed1i t\u00e1c c\u1ee7a n\u00f3, nh\u1eb1m m\u1ee5c \u0111\u00edch \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 n\u00e9n d\u1eef li\u1ec7u cao h\u01a1n b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf th\u00f4ng tin kh\u00f4ng c\u1ea7n thi\u1ebft kh\u1ecfi t\u1ec7p g\u1ed1c. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c v\u00ec m\u1ed9t s\u1ed1 d\u1eef li\u1ec7u s\u1ebd b\u1ecb m\u1ea5t v\u0129nh vi\u1ec5n trong qu\u00e1 tr\u00ecnh n\u00e9n. M\u1eb7c d\u00f9 \u0111i\u1ec1u n\u00e0y l\u00fac \u0111\u1ea7u c\u00f3 v\u1ebb ph\u1ea3n tr\u1ef1c gi\u00e1c, nh\u01b0ng k\u1ef9 thu\u1eadt n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3 cao trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf kh\u00e1c nhau.<\/p>\n<h2>T\u00ednh n\u0103ng n\u00e9n t\u1ed5n th\u1ea5t ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a n\u00e9n m\u1ea5t d\u1eef li\u1ec7u xoay quanh vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u00e0 lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u d\u01b0 th\u1eeba ho\u1eb7c \u00edt \u0111\u01b0\u1ee3c nh\u1eadn bi\u1ebft h\u01a1n kh\u1ecfi t\u1ec7p ngu\u1ed3n. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u00f4ng qua c\u00e1c thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt bi\u1ebfn \u0111\u1ed5i to\u00e1n h\u1ecdc, l\u01b0\u1ee3ng t\u1eed h\u00f3a v\u00e0 x\u1ea5p x\u1ec9 d\u1eef li\u1ec7u. Trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 n\u00e9n h\u00ecnh \u1ea3nh, thu\u1eadt to\u00e1n \u01b0u ti\u00ean lo\u1ea1i b\u1ecf th\u00f4ng tin m\u00e0 m\u1eaft ng\u01b0\u1eddi \u00edt nh\u00ecn th\u1ea5y h\u01a1n, do \u0111\u00f3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a n\u00e9n t\u1ed5n hao<\/h2>\n<p>N\u00e9n t\u1ed5n th\u1ea5t cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh gi\u00fap n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/p>\n<ol>\n<li>\n<p><strong>T\u1ef7 l\u1ec7 n\u00e9n cao:<\/strong> N\u00e9n c\u00f3 t\u1ed5n hao c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 n\u00e9n cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt n\u00e9n kh\u00f4ng t\u1ed5n hao, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho vi\u1ec7c truy\u1ec1n v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>S\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 k\u00edch th\u01b0\u1edbc:<\/strong> Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh m\u1ee9c \u0111\u1ed9 n\u00e9n, cho ph\u00e9p c\u00e2n b\u1eb1ng gi\u1eefa vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ec7p v\u00e0 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng v\u00e0o \u0111a ph\u01b0\u01a1ng ti\u1ec7n:<\/strong> N\u00e9n t\u1ed5n th\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111a ph\u01b0\u01a1ng ti\u1ec7n nh\u01b0 h\u00ecnh \u1ea3nh, video v\u00e0 \u00e2m thanh do b\u1ea3n ch\u1ea5t nh\u1eadn th\u1ee9c c\u1ee7a con ng\u01b0\u1eddi v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng s\u1ef1 m\u1ea5t m\u00e1t d\u1eef li\u1ec7u nh\u1ecf.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i n\u00e9n t\u1ed5n hao<\/h2>\n<p>K\u1ef9 thu\u1eadt n\u00e9n t\u1ed5n hao c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i d\u1eef li\u1ec7u \u0111ang \u0111\u01b0\u1ee3c x\u1eed l\u00fd. M\u1ed9t s\u1ed1 ki\u1ec3u n\u00e9n c\u00f3 t\u1ed5n hao ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>N\u00e9n h\u00ecnh \u1ea3nh<\/td>\n<td>C\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 JPEG, WebP v\u00e0 JPEG 2000 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 n\u00e9n \u1ea3nh b\u1ecb m\u1ea5t d\u1eef li\u1ec7u. H\u1ecd t\u1eadp trung v\u00e0o vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc h\u00ecnh \u1ea3nh trong khi v\u1eabn duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh \u1edf m\u1ee9c ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/td>\n<\/tr>\n<tr>\n<td>N\u00e9n video<\/td>\n<td>C\u00e1c \u0111\u1ecbnh d\u1ea1ng n\u00e9n video b\u1ecb m\u1ea5t d\u1eef li\u1ec7u nh\u01b0 H.264, H.265 (HEVC) v\u00e0 VP9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 truy\u1ec1n ph\u00e1t video hi\u1ec7u qu\u1ea3 qua internet v\u00e0 t\u1ed1i \u01b0u h\u00f3a b\u1ed9 nh\u1edb.<\/td>\n<\/tr>\n<tr>\n<td>N\u00e9n \u00e2m thanh<\/td>\n<td>C\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u01b0 MP3, AAC v\u00e0 Ogg Vorbis s\u1eed d\u1ee5ng t\u00ednh n\u0103ng n\u00e9n \u00e2m thanh b\u1ecb m\u1ea5t \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ec7p \u00e2m thanh trong khi v\u1eabn duy tr\u00ec m\u1ee9c ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh th\u1ecfa \u0111\u00e1ng.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng v\u00e0 th\u00e1ch th\u1ee9c c\u1ee7a n\u00e9n t\u1ed5n th\u1ea5t<\/h2>\n<p>N\u00e9n t\u1ed5n th\u1ea5t t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n<ul>\n<li>\n<p><strong>Truy\u1ec1n ph\u00e1t \u0111a ph\u01b0\u01a1ng ti\u1ec7n:<\/strong> T\u00ednh n\u0103ng n\u00e9n t\u1ed5n th\u1ea5t cho ph\u00e9p truy\u1ec1n ph\u00e1t n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n qua internet m\u1ed9t c\u00e1ch m\u01b0\u1ee3t m\u00e0, \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng li\u1ec1n m\u1ea1ch.<\/p>\n<\/li>\n<li>\n<p><strong>Truy\u1ec1n d\u1eef li\u1ec7u:<\/strong> C\u00e1c t\u1ec7p n\u00e9n y\u00eau c\u1ea7u \u00edt b\u0103ng th\u00f4ng h\u01a1n, khi\u1ebfn vi\u1ec7c n\u00e9n t\u1ed5n th\u1ea5t tr\u1edf n\u00ean c\u1ea7n thi\u1ebft \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 qua m\u1ea1ng.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1i \u01b0u h\u00f3a l\u01b0u tr\u1eef:<\/strong> N\u00e9n t\u1ed5n th\u1ea5t cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef ch\u1ee9a \u0111\u01b0\u1ee3c kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn h\u01a1n, t\u1ed1i \u0111a h\u00f3a dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef.<\/p>\n<\/li>\n<\/ul>\n<p>Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng t\u00ednh n\u0103ng n\u00e9n c\u00f3 t\u1ed5n hao \u0111i k\u00e8m v\u1edbi m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c nh\u1ea5t \u0111\u1ecbnh, bao g\u1ed3m:<\/p>\n<ul>\n<li>\n<p><strong>Suy tho\u00e1i ch\u1ea5t l\u01b0\u1ee3ng:<\/strong> N\u00e9n qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng gi\u1ea3 c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y v\u00e0 gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u00f2i h\u1ecfi ph\u1ea3i ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn m\u1ee9c \u0111\u1ed9 n\u00e9n.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c:<\/strong> Khi d\u1eef li\u1ec7u b\u1ecb lo\u1ea1i b\u1ecf trong qu\u00e1 tr\u00ecnh n\u00e9n, n\u00f3 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c h\u1ed3i ho\u00e0n to\u00e0n, khi\u1ebfn cho vi\u1ec7c n\u00e9n c\u00f3 t\u1ed5n hao kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh, ch\u1eb3ng h\u1ea1n nh\u01b0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan tr\u1ecdng.<\/p>\n<\/li>\n<\/ul>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u li\u00ean t\u1ee5c kh\u00e1m ph\u00e1 c\u00e1c thu\u1eadt to\u00e1n v\u00e0 k\u1ef9 thu\u1eadt m\u00e3 h\u00f3a ti\u00ean ti\u1ebfn.<\/p>\n<h2>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh<\/h2>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt ng\u1eef<\/th>\n<th>N\u00e9n t\u1ed5n hao<\/th>\n<th>N\u00e9n kh\u00f4ng m\u1ea5t d\u1eef li\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ef7 l\u1ec7 n\u00e9n<\/td>\n<td>T\u1ef7 l\u1ec7 n\u00e9n cao h\u01a1n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c.<\/td>\n<td>T\u1ef7 l\u1ec7 n\u00e9n th\u1ea5p h\u01a1n so v\u1edbi lossy.<\/td>\n<\/tr>\n<tr>\n<td>Ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u<\/td>\n<td>Qu\u00e1 tr\u00ecnh kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c; m\u1ed9t s\u1ed1 d\u1eef li\u1ec7u b\u1ecb m\u1ea5t.<\/td>\n<td>Qu\u00e1 tr\u00ecnh ho\u00e0n to\u00e0n thu\u1eadn ngh\u1ecbch; kh\u00f4ng b\u1ecb m\u1ea5t d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1c \u1ee9ng d\u1ee5ng<\/td>\n<td>D\u1eef li\u1ec7u \u0111a ph\u01b0\u01a1ng ti\u1ec7n, truy\u1ec1n ph\u00e1t v\u00e0 truy\u1ec1n t\u1ea3i.<\/td>\n<td>L\u01b0u tr\u1eef, l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan tr\u1ecdng v\u00e0 m\u00e3 h\u00f3a.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai c\u1ee7a n\u00e9n t\u1ed5n hao<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, t\u00ednh n\u0103ng n\u00e9n c\u00f3 t\u1ed5n hao d\u1ef1 ki\u1ebfn s\u1ebd \u0111\u00f3ng m\u1ed9t vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c cho ph\u00e9p x\u1eed l\u00fd d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 h\u01a1n tr\u00ean nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau. C\u00e1c thu\u1eadt to\u00e1n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn m\u1edbi c\u00f3 kh\u1ea3 n\u0103ng xu\u1ea5t hi\u1ec7n, mang l\u1ea1i t\u1ef7 l\u1ec7 n\u00e9n cao h\u01a1n \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u t\u00ecnh tr\u1ea1ng gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c. V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i nh\u01b0 th\u1ef1c t\u1ebf \u1ea3o (VR) v\u00e0 th\u1ef1c t\u1ebf t\u0103ng c\u01b0\u1eddng (AR), n\u00e9n t\u1ed5n th\u1ea5t s\u1ebd ti\u1ebfp t\u1ee5c l\u00e0 c\u00f4ng c\u1ee5 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m \u0111a ph\u01b0\u01a1ng ti\u1ec7n s\u1ed1ng \u0111\u1ed9ng.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 n\u00e9n t\u1ed5n hao<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i \u0111\u00e1ng k\u1ec3 t\u1eeb vi\u1ec7c n\u00e9n c\u00f3 t\u1ed5n th\u1ea5t. Khi ng\u01b0\u1eddi d\u00f9ng k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 proxy, y\u00eau c\u1ea7u c\u1ee7a h\u1ecd s\u1ebd chuy\u1ec3n qua c\u00e1c trung gian n\u00e0y, ti\u00eau t\u1ed1n b\u0103ng th\u00f4ng m\u1ea1ng. B\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n n\u00e9n t\u1ed5n th\u1ea5t \u1edf \u0111\u1ea7u m\u00e1y ch\u1ee7 proxy, d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 m\u00e1y kh\u00e1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m k\u00edch th\u01b0\u1edbc m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, d\u1eabn \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n v\u00e0 gi\u1ea3m m\u1ee9c ti\u00eau th\u1ee5 b\u0103ng th\u00f4ng.<\/p>\n<p>H\u01a1n n\u1eefa, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng t\u00ednh n\u0103ng n\u00e9n c\u00f3 t\u1ed5n hao cho h\u00ecnh \u1ea3nh, video v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111a ph\u01b0\u01a1ng ti\u1ec7n kh\u00e1c tr\u01b0\u1edbc khi chuy\u1ec3n ti\u1ebfp ch\u00fang t\u1edbi ng\u01b0\u1eddi d\u00f9ng. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y gi\u00fap gi\u1ea3m th\u1eddi gian t\u1ea3i trang web v\u00e0 n\u00e2ng cao tr\u1ea3i nghi\u1ec7m duy\u1ec7t web t\u1ed5ng th\u1ec3 cho ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 n\u00e9n t\u1ed5n th\u1ea5t, h\u00e3y xem x\u00e9t kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.data-compression.com\/\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1ea3i th\u00edch v\u1ec1 n\u00e9n d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/www.nyu.edu\/projects\/ratner\/intro.html\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u v\u1ec1 n\u00e9n t\u1ed5n th\u1ea5t<\/a><\/li>\n<li><a href=\"https:\/\/www.jpeg.org\/jpeg\/\" target=\"_new\" rel=\"noopener nofollow\">N\u00e9n h\u00ecnh \u1ea3nh: JPEG<\/a><\/li>\n<li><a href=\"https:\/\/www.itu.int\/rec\/T-REC-H.264\" target=\"_new\" rel=\"noopener nofollow\">N\u00e9n video: H.264<\/a><\/li>\n<li><a href=\"https:\/\/www.mp3-tech.org\/\" target=\"_new\" rel=\"noopener nofollow\">N\u00e9n \u00e2m thanh: MP3<\/a><\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, n\u00e9n m\u1ea5t d\u1eef li\u1ec7u l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt x\u1eed l\u00fd d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd gi\u00fap t\u00ecm ra c\u00e1c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt s\u1ed1. Kh\u1ea3 n\u0103ng \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ec7p v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c khi\u1ebfn n\u00f3 kh\u00f4ng th\u1ec3 thi\u1ebfu trong vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i, truy\u1ec1n ph\u00e1t \u0111a ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 t\u1ed1i \u01b0u h\u00f3a l\u01b0u tr\u1eef. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, t\u01b0\u01a1ng lai c\u1ee7a n\u00e9n t\u1ed5n th\u1ea5t c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng \u0111\u1ea7y h\u1ee9a h\u1eb9n, \u0111\u1ea3m b\u1ea3o x\u1eed l\u00fd v\u00e0 ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 h\u01a1n tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 kh\u00e1c nhau. Khi k\u1ebft h\u1ee3p v\u1edbi m\u00e1y ch\u1ee7 proxy, t\u00ednh n\u0103ng n\u00e9n b\u1ecb m\u1ea5t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 g\u00f3p ph\u1ea7n n\u00e2ng cao tr\u1ea3i nghi\u1ec7m duy\u1ec7t web v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a.<\/p>","protected":false},"featured_media":468814,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477895","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Lossy Compression: Preserving Efficiency in Data Transmission<\/mark>","faq_items":[{"question":"What is Lossy Compression?","answer":"<p>Lossy Compression is a data processing technique that reduces the size of files while sacrificing some non-essential information from the original data. It is widely used in various digital applications like multimedia streaming, data transmission, and storage optimization to achieve higher compression ratios.<\/p>"},{"question":"How does Lossy Compression work?","answer":"<p>Lossy Compression works by employing sophisticated algorithms that identify and discard less perceptible or redundant data from the source file. The process is irreversible, meaning some data is permanently lost during compression. However, this technique ensures efficient data handling and transmission.<\/p>"},{"question":"What are the key features of Lossy Compression?","answer":"<p>Lossy Compression offers several key features, including high compression ratios, a quality-size tradeoff, and applicability to multimedia data. It allows users to adjust compression levels to strike a balance between file size reduction and maintaining acceptable quality.<\/p>"},{"question":"What types of Lossy Compression exist?","answer":"<p>There are several types of Lossy Compression depending on the type of data being processed:<\/p><ul><li>Image Compression: Utilizing formats like JPEG, WebP, and JPEG 2000 to reduce image size while preserving visual quality.<\/li><li>Video Compression: Implementing formats like H.264, H.265 (HEVC), and VP9 for efficient video streaming and storage.<\/li><li>Audio Compression: Using formats like MP3, AAC, and Ogg Vorbis for compressing audio files without significant quality loss.<\/li><\/ul>"},{"question":"What are the applications and challenges of Lossy Compression?","answer":"<p>Lossy Compression finds applications in multimedia streaming, data transmission, and storage optimization. It allows smooth content delivery and maximizes storage capacities. However, it comes with challenges like quality degradation and irreversibility, which require careful control and consideration.<\/p>"},{"question":"How does Lossy Compression compare to Lossless Compression?","answer":"<p>Lossy Compression achieves higher compression ratios compared to Lossless Compression, but it is an irreversible process that results in some data loss. Lossless Compression, on the other hand, preserves data entirely but with lower compression ratios.<\/p>"},{"question":"What are the future prospects of Lossy Compression?","answer":"<p>As technology advances, Lossy Compression is expected to play a crucial role in enabling more efficient data handling and delivering immersive multimedia experiences. Researchers are likely to develop innovative algorithms for higher compression ratios and reduced perceptible quality loss.<\/p>"},{"question":"How can proxy servers benefit from Lossy Compression?","answer":"<p>Proxy servers, like OneProxy, can benefit from Lossy Compression by reducing data transmitted between the server and clients, leading to improved data transfer speeds and reduced bandwidth consumption. Additionally, applying Lossy Compression to multimedia elements optimizes content delivery and enhances browsing experiences.<\/p>"},{"question":"Where can I find more information about Lossy Compression?","answer":"<p>For further information about Lossy Compression, you can explore the following resources:<\/p><ul><li>Data Compression Explained (URL: <a href=\"https:\/\/www.data-compression.com\/\" target=\"_new\">https:\/\/www.data-compression.com\/<\/a>)<\/li><li>Introduction to Lossy Compression (URL: <a href=\"https:\/\/www.nyu.edu\/projects\/ratner\/intro.html\" target=\"_new\">https:\/\/www.nyu.edu\/projects\/ratner\/intro.html<\/a>)<\/li><li>Image Compression: JPEG (URL: <a href=\"https:\/\/www.jpeg.org\/jpeg\/\" target=\"_new\">https:\/\/www.jpeg.org\/jpeg\/<\/a>)<\/li><li>Video Compression: H.264 (URL: <a href=\"https:\/\/www.itu.int\/rec\/T-REC-H.264\" target=\"_new\">https:\/\/www.itu.int\/rec\/T-REC-H.264<\/a>)<\/li><li>Audio Compression: MP3 (URL: <a href=\"https:\/\/www.mp3-tech.org\/\" target=\"_new\">https:\/\/www.mp3-tech.org\/<\/a>)<\/li><\/ul>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477895\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468814"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}