Ch\u00fang ta \u0111\u1ec1u \u0111\u00e3 xem phim do m\u00e1y VCD ho\u1eb7c m\u00e1y t\u00ednh chi\u1ebfu. Khi g\u1eb7p tr\u01b0\u1eddng h\u1ee3p \u0111\u0129a VCD ho\u1eb7c m\u00e1y VCD ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p th\u00ec h\u00ecnh \u1ea3nh trong m\u00e0n h\u00ecnh th\u01b0\u1eddng ng\u1eebng l\u1ea1i, nh\u1ea3y nh\u00f3t ho\u1eb7c xu\u1ea5t hi\u1ec7n m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec1u \u00f4 vu\u00f4ng gh\u00e9p l\u1ea1i. Nh\u1eefng \u00f4 nh\u1ecf n\u00e0y th\u1eadt gi\u1ed1ng nh\u01b0 nh\u1eefng vi\u00ean g\u1ea1ch men l\u00e1t s\u00e0n (mosaic – kh\u1ea3m) c\u00f3 m\u00e0u s\u1eafc, hoa v\u0103n kh\u00e1c nhau. X\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f3 li\u00ean quan t\u1edbi nguy\u00ean l\u00ed ph\u00e1t c\u1ee7a m\u00e1y VCD v\u00e0 ph\u01b0\u01a1ng th\u1ee9c l\u01b0u tr\u1eef th\u00f4ng tin tr\u00ean \u0111\u0129a VCD.<\/p>\n\n\n\n
\u0110\u0129a VCD l\u00e0 m\u1ed9t lo\u1ea1i \u0111\u0129a quang l\u01b0u tr\u1eef sau khi \u0111\u00e3 n\u00e9n th\u00f4ng tin h\u00ecnh \u1ea3nh. L\u00fac ph\u00e1t, m\u00e1y VCD ho\u1eb7c m\u00e1y t\u00ednh sau khi \u0111\u1ecdc th\u00f4ng tin \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00e9n th\u00ec ti\u1ebfn h\u00e0nh gi\u1ea3i n\u00e9n r\u1ed3i bi\u1ebfn \u0111\u1ed5i d\u1eef li\u1ec7u h\u00ecnh \u1ea3nh th\u00e0nh h\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb l\u00ean m\u00e0n h\u00ecnh. Qu\u00e1 tr\u00ecnh gi\u1ea3i n\u00e9n c\u00f3 th\u1ec3 c\u00f3 hai tr\u01b0\u1eddng h\u1ee3p: (1) Gi\u1ea3i n\u00e9n b\u1eb1ng ph\u1ea7n c\u1ee9ng. Vi\u1ec7c n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi card ph\u00e1t l\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng gi\u1ea3i n\u00e9n t\u01b0\u01a1ng \u1ee9ng \u1edf trong m\u00e1y t\u00ednh ho\u1eb7c \u0111\u1ea7u video. (2) Khi \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh ph\u00e1t, c\u00f3 th\u1ec3 d\u00f9ng ph\u1ea7n m\u1ec1m gi\u1ea3i n\u00e9n chuy\u00ean d\u1ee5ng v\u00e0 CPU s\u1ebd th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c gi\u1ea3i n\u00e9n.<\/p>\n\n\n\n
D\u1eef li\u1ec7u h\u00ecnh \u1ea3nh sau khi \u0111\u01b0\u1ee3c gi\u1ea3i n\u00e9n th\u00ec t\u1eebng b\u1ee9c truy\u1ec1n \u0111\u1ebfn b\u1ed9 hi\u1ec3n th\u1ecb. B\u1ed9 hi\u1ec3n th\u1ecb s\u1ebd hi\u1ec3n th\u1ecb l\u00ean m\u00e0n h\u00ecnh t\u1eebng b\u1ee9c h\u00ecnh theo t\u1ed1c \u0111\u1ed9 m\u1ed7i gi\u00e2y 30 b\u1ee9c (ho\u1eb7c 25 b\u1ee9c). V\u00e0 th\u1ebf l\u00e0 cho ta c\u1ea3m gi\u00e1c v\u1eadn \u0111\u1ed9ng c\u1ee7a nh\u00e2n v\u1eadt v\u00e0 c\u1ea3nh t\u01b0\u1ee3ng. N\u1ebfu nh\u01b0 d\u1eef li\u1ec7u h\u00ecnh \u1ea3nh c\u1ee7a b\u1ee9c h\u00ecnh sau kh\u00f4ng th\u1ec3 \u0111\u01b0a t\u1edbi hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh theo th\u1eddi gian \u1ea5n \u0111\u1ecbnh th\u00ec trang h\u00ecnh s\u1ebd c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng ng\u1eebng. Do v\u1eady, tr\u1edf n\u00ean kh\u00f4ng li\u00ean t\u1ee5c. Th\u00f4ng th\u01b0\u1eddng th\u00ec h\u1ec7 th\u1ed1ng \u00e1p d\u1ee5ng bi\u1ec7n ph\u00e1p nh\u1ea3y b\u1ee9c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o cho vi\u1ec7c \u0111\u1ed3ng b\u1ed9 c\u1ee7a h\u00ecnh v\u00e0 ti\u1ebfng. Ngh\u0129a l\u00e0 khi trang h\u00ecnh x\u1ea3y ra t\u1ed1c \u0111\u1ed9 ch\u1eadm th\u00ec s\u1ebd v\u1ee9t b\u1ecf b\u1ee9c h\u00ecnh kh\u00f4ng k\u1ecbp h\u00ecnh th\u00e0nh kia \u0111\u1ec3 \u0111u\u1ed5i k\u1ecbp t\u1ed1c \u0111\u1ed9 ph\u00e1t \u00e2m thanh, \u0111\u1ea3m b\u1ea3o s\u1ef1 li\u00ean t\u1ee5c c\u1ee7a \u00e2m thanh. L\u00fac n\u00e0y trang h\u00ecnh s\u1ebd ng\u1eebng v\u00e0 nh\u1ea3y h\u00ecnh.<\/p>\n\n\n\n
V\u1eady th\u00ec nguy\u00ean nh\u00e2n n\u00e0o d\u1eabn \u0111\u1ebfn kh\u00f4ng k\u1ecbp hi\u1ec7n l\u00ean tr\u00ean h\u00ecnh v\u1eady? M\u1ed7i m\u1ed9t kh\u00e2u trong qu\u00e1 tr\u00ecnh ph\u00e1t VCD \u0111\u1ec1u c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng kh\u00f4ng k\u1ecbp hi\u1ec7n trang h\u00ecnh. V\u00ed d\u1ee5 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u0129a VCD ho\u1eb7c CD- ROM k\u00e9m, card m\u00e0n h\u00ecnh t\u1ed1c \u0111\u1ed9 th\u1ea5p v.v. Nh\u1eefng kh\u00e2u n\u00e0y c\u00f3 v\u1ea5n \u0111\u1ec1 th\u00ec s\u1ebd t\u1ea1o n\u00ean ngh\u1ebdn t\u1eafc khi\u1ebfn s\u1ed1 li\u1ec7u kh\u00f4ng th\u1ec3 k\u1ecbp th\u1eddi \u0111\u01b0\u1ee3c x\u1eed l\u00ed v\u00e0 truy\u1ec1n t\u1ea3i. Do v\u1eady, ph\u00e1t h\u00ecnh kh\u00f4ng th\u1ec3 li\u00ean t\u1ee5c.<\/p>\n\n\n\n
Do \u0111\u0129a VCD \u0111\u01b0\u1ee3c n\u00e9n theo c\u00e1ch chia ra 16 x 16 \u00f4 vu\u00f4ng nh\u1ecf, v\u00e0 r\u1ea5t nhi\u1ec1u b\u1ee9c l\u1ea1i \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh b\u00f9 \u0111\u1eafp v\u1eadn \u0111\u1ed9ng ho\u1eb7c d\u1eb7m th\u00eam tr\u00ean c\u01a1 s\u1edf c\u00e1c b\u1ee9c tr\u01b0\u1edbc v\u00e0 sau. B\u1edfi v\u1eady trong tr\u01b0\u1eddng h\u1ee3p b\u00ecnh th\u01b0\u1eddng th\u00ec m\u1ed7i m\u1ed9t b\u1ee9c \u0111\u1ec1u c\u00f3 th\u1ec3 t\u00ednh ra t\u1eeb quan h\u1ec7 c\u00e1c b\u1ee9c li\u1ec1n k\u1ec1 tr\u01b0\u1edbc v\u00e0 sau. Gi\u1eefa c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf 16 x 16 tr\u00ean trang h\u00ecnh c\u00f3 th\u1ec3 gh\u00e9p n\u1ed1i t\u1ed1t v\u1edbi nhau, b\u1edfi th\u1ebf m\u00e0 c\u1ea5u tr\u00fac \u00f4 vu\u00f4ng h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 c\u1ea3m gi\u00e1c trong ta. \u0110\u01b0\u01a1ng nhi\u00ean, n\u1ebfu quan s\u00e1t cho k\u0129 th\u00ec khi trang h\u00ecnh thay \u0111\u1ed5i kh\u00e1 nhanh ta v\u1eabn c\u00f3 th\u1ec3 l\u1edd m\u1edd th\u1ea5y \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac \u00f4 \u0111\u00f3. \u0110\u00f3 l\u00e0 v\u00ec khi b\u1ee9c h\u00ecnh k\u1ebf c\u1eadn bi\u1ebfn \u0111\u1ed5i qu\u00e1 l\u1edbn, s\u1ef1 b\u00f9 \u0111\u1eafp v\u1eadn \u0111\u1ed9ng v\u00e0 d\u1eb7m v\u00e0o kh\u00f4ng th\u1ec3 n\u00e9n s\u1ed1 li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. \u0110\u1ec3 kh\u1ed1ng ch\u1ebf l\u01b0\u1ee3ng s\u1ed1 li\u1ec7u trong ph\u1ea1m vi cho ph\u00e9p th\u00ec ph\u1ea3i l\u00e0m t\u1ed5n th\u1ea5t \u0111\u1ebfn nhi\u1ec1u chi ti\u1ebft \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t n\u00e9n. K\u1ebft qu\u1ea3 l\u00e0 trang h\u00ecnh g\u1ed3m c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c x\u1ea3y ra kh\u00f4ng th\u1eadt, kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi nhau.<\/p>\n\n\n\n
Trang h\u00ecnh nh\u01b0 v\u1eady s\u1ebd x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng mosaic nho nh\u1ecf.<\/p>\n\n\n\n
N\u1ebfu nh\u01b0 t\u1eebng kh\u00e2u trong qu\u00e1 tr\u00ecnh ph\u00e1t h\u00ecnh \u0111\u1ec1u c\u00f3 v\u1ea5n \u0111\u1ec1 th\u00ec ngo\u00e0i vi\u1ec7c d\u1eabn t\u1edbi s\u1ef1 ng\u1eebng v\u00e0 nh\u1ea3y h\u00ecnh c\u1ee7a trang h\u00ecnh ra, c\u00f2n c\u00f3 th\u1ec3 d\u1eabn t\u1edbi hi\u1ec7n t\u01b0\u1ee3ng mosaic nghi\u00eam tr\u1ecdng. V\u00ed d\u1ee5 n\u1ebfu CD – ROM \u0111\u1ecdc sai ho\u1eb7c \u0111\u1ecdc kh\u00f4ng ra s\u1ed1 li\u1ec7u th\u00ec trang h\u00ecnh g\u1ed3m nhi\u1ec1u \u00f4 vu\u00f4ng nh\u1ecf t\u01b0\u01a1ng \u1ee9ng s\u1ebd kh\u00f4ng t\u00e0i n\u00e0o h\u00ecnh th\u00e0nh ch\u00ednh x\u00e1c. Nh\u1eefng \u00f4 sai l\u1ea7m kia s\u1ebd hi\u1ec7n l\u00ean tr\u00ean trang h\u00ecnh. \u0110i\u1ec1u n\u00e0y v\u1eabn th\u01b0\u1eddng th\u1ea5y khi ph\u00e1t \u0111\u0129a VCD ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng cao. L\u1ea1i v\u00ed d\u1ee5, n\u1ebfu do v\u1ea5n \u0111\u1ec1 t\u1ed1c \u0111\u1ed9 ph\u00e1t m\u00e0 \u0111i t\u1edbi vi\u1ec7c nh\u1ea3y h\u00ecnh th\u00ec c\u00f3 th\u1ec3 khi\u1ebfn cho s\u1ed1 li\u1ec7u c\u1ee7a h\u00ecnh sau do h\u00ecnh tr\u01b0\u1edbc b\u1ecb nh\u1ea3y qua m\u00e0 kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i ch\u00ednh x\u00e1c. V\u00ec v\u1eady c\u0169ng c\u00f3 th\u1ec3 d\u1eabn t\u1edbi hi\u1ec7n t\u01b0\u1ee3ng mosaic.<\/p>\n\n\n\n
T\u1eeb kh\u00f3a: \u0110\u0129a VCD; Hi\u1ec7n t\u01b0\u1ee3ng mosaic.<\/p>\n","protected":false},"excerpt":{"rendered":"
Ch\u00fang ta \u0111\u1ec1u \u0111\u00e3 xem phim do m\u00e1y VCD ho\u1eb7c m\u00e1y t\u00ednh chi\u1ebfu. Khi g\u1eb7p tr\u01b0\u1eddng h\u1ee3p \u0111\u0129a VCD ho\u1eb7c m\u00e1y VCD ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p th\u00ec h\u00ecnh \u1ea3nh trong m\u00e0n h\u00ecnh th\u01b0\u1eddng ng\u1eebng l\u1ea1i, nh\u1ea3y nh\u00f3t ho\u1eb7c xu\u1ea5t hi\u1ec7n m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec1u \u00f4 vu\u00f4ng gh\u00e9p l\u1ea1i. Nh\u1eefng \u00f4 nh\u1ecf n\u00e0y th\u1eadt gi\u1ed1ng nh\u01b0 nh\u1eefng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,13],"tags":[],"class_list":["post-10400","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tin-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10400"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10400\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}