VCD \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb CD. CD l\u00e0 m\u1ed9t lo\u1ea1i \u0111\u0129a quang l\u01b0u tr\u1eef t\u00edn hi\u1ec7u \u00e2m t\u1ea7n, th\u01b0\u1eddng g\u1ecdi l\u00e0 \u0111\u0129a h\u00e1t laze. N\u00f3 sau khi l\u1ea5y m\u1eabu t\u00edn hi\u1ec7u \u00e2m t\u1ea7n m\u00f4 ph\u1ecfng th\u00ec chuy\u1ec3n \u0111\u1ed5i th\u00e0nh t\u00edn hi\u1ec7u s\u1ed1 r\u1ed3i ch\u1ebf t\u1ea1o ra. Khi ch\u1ebf t\u1ea1o CD, ta ti\u1ebfn h\u00e0nh ghi s\u1ed1 cho s\u1ed1 li\u1ec7u \u00e2m t\u1ea7n c\u00f3 \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng n\u00e9n s\u1ed1 li\u1ec7u b\u1eb1ng b\u1ea5t c\u1ee9 c\u00e1ch n\u00e0o. Sau \u0111\u00f3 ghi v\u00e0o \u0111\u0129a quang tr\u1eafng \u0111\u01b0\u1eddng k\u00ednh 12 cm b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u00e1p m\u00e0ng theo m\u1ed9t c\u00e1ch n\u00e0o \u0111\u00f3. \u0110\u0129a \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o ki\u1ec3u \u0111\u00f3 c\u00f3 th\u1ec3 ph\u00e1t \u00e2m nh\u1ea1c h\u01a1n m\u1ed9t gi\u1edd li\u1ec1n, nh\u01b0ng kh\u00f4ng c\u00f3 h\u00ecnh \u1ea3nh.<\/p>\n\n\n\n
M\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u bi\u1ebft r\u1eb1ng l\u01b0\u1ee3ng s\u1ed1 li\u1ec7u c\u1ee7a t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh \u0111\u01b0\u1ee3c s\u1ed1 h\u00f3a l\u00e0 v\u00f4 c\u00f9ng l\u1edbn. N\u00f3i chung khi h\u00ecnh \u1ea3nh tr\u00ean m\u00e0n h\u00ecnh bi\u1ebfn \u0111\u1ed5i m\u1ed7i gi\u00e2y kho\u1ea3ng 10 b\u1ee9c th\u00ec ng\u01b0\u1eddi xem c\u1ea3m th\u1ea5y h\u00ecnh \u1ea3nh b\u1ecb gi\u00e1n \u0111o\u1ea1n. C\u00f2n m\u1ed7i gi\u00e2y bi\u1ebfn \u0111\u1ed5i h\u00ecnh l\u00e0 kho\u1ea3ng 15 b\u1ee9c th\u00ec v\u1eabn cho ta c\u1ea3m gi\u00e1c nh\u1ea3y nh\u00f3t. Ch\u1ec9 khi h\u00ecnh \u1ea3nh thay \u0111\u1ed5i \u0111\u1ea1t m\u1ee9c m\u1ed7i gi\u00e2y 25 h\u00ecnh th\u00ec m\u1edbi cho ta c\u1ea3m gi\u00e1c h\u00ecnh \u1ea3nh bi\u1ebfn \u0111\u1ed5i li\u00ean t\u1ee5c. L\u01b0\u1ee3ng th\u00f4ng tin ch\u1ee9a trong m\u00f4i tr\u01b0\u1eddng \u1ea3nh ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau c\u1ee7a m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb h\u00ecnh \u1ea3nh l\u00e0 l\u1edbn hay nh\u1ecf, hi\u1ec7u su\u1ea5t ph\u00e2n bi\u1ec7t l\u00e0 cao hay th\u1ea5p v\u00e0 s\u1ef1 kh\u00e1c nhau v\u1ec1 m\u1ee9c \u0111\u1ed9 phong ph\u00fa c\u1ee7a m\u00e0u s\u1eafc. N\u1ebfu ta ghi v\u00e0o \u0111\u0129a quang c\u00f3 dung l\u01b0\u1ee3ng 650 M k\u00ed t\u1ef1 v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u00e0 12 cm nh\u1eefng s\u1ed1 li\u1ec7u h\u00ecnh \u1ea3nh \u0111\u1ed9ng ch\u01b0a \u0111\u01b0\u1ee3c n\u00e9n, th\u00ec m\u1ed7i \u0111\u0129a quang ch\u1ec9 c\u00f3 th\u1ec3 ghi \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u truy\u1ec1n h\u00ecnh kho\u1ea3ng 24 gi\u00e2y. \u0110i\u1ec1u n\u00e0y hi\u1ec3n nhi\u00ean l\u00e0 kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb th\u1ef1c d\u1ee5ng.<\/p>\n\n\n\n
\u0110\u1ec3 c\u00f3 th\u1ec3 l\u01b0u tr\u1eef tr\u00ean m\u1ed9t \u0111\u0129a quang nh\u1eefng t\u00edn hi\u1ec7u \u00e2m t\u1ea7n (audio) v\u00e0 th\u1ecb t\u1ea7n (video) v\u1edbi th\u1eddi gian t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i, trong gia \u0111\u00ecnh CD \u0111\u00e3 sinh ra c\u1eadu b\u00e9 VCD. N\u00f3 c\u0169ng c\u1ee1 nh\u01b0 \u0111\u0129a CD nh\u01b0ng khi s\u1ea3n xu\u1ea5t th\u00ec ph\u1ea3i \u00e1p d\u1ee5ng quy t\u1eafc ghi m\u00e3 s\u1ed1 g\u1ecdi l\u00e0 “MPEG – 1” \u0111\u1ec3 n\u00e9n c\u00e1c d\u1eef li\u1ec7u. L\u00fac ch\u1ebf t\u1ea1o, tho\u1ea1t \u0111\u1ea7u ph\u1ea3i x\u1eed l\u00ed n\u00e9n d\u1eef li\u1ec7u \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh. Sau \u0111\u00f3 “kh\u1eafc” nh\u1eefng s\u1ed1 li\u1ec7u \u0111\u00e3 n\u00e9n l\u00ean \u0111\u0129a quang tr\u1eafng. V\u1edbi c\u00e1ch l\u00e0m n\u00e0y, tr\u00ean m\u1ed9t \u0111\u0129a CD tr\u1eafng s\u1ebd c\u00f3 th\u1ec3 l\u01b0u tr\u1eef phim \u1ea3nh truy\u1ec1n h\u00ecnh ch\u01b0\u01a1ng tr\u00ecnh karaoke kho\u1ea3ng 74 ph\u00fat. L\u00fac ph\u00e1t VCD, c\u00e1c s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ecdc b\u1eb1ng thi\u1ebft b\u1ecb \u0111\u1ecdc k\u00edch quang ph\u1ea3i nh\u1edd \u0111\u1ebfn m\u00e1y t\u00ednh ho\u1eb7c con chip b\u1ed9 vi x\u1eed l\u00ed \u0111\u1ec3 gi\u1ea3i n\u00e9n. T\u00edn hi\u1ec7u th\u1ecb t\u1ea7n v\u00e0 t\u00edn hi\u1ec7u \u00e2m t\u1ea7n s\u1ed1 qua gi\u1ea3i n\u00e9n s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a t\u1edbi thi\u1ebft b\u1ecb truy\u1ec1n ra \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh, \u0111\u1ec3 ch\u00fang ta nghe th\u1ea5y \u00e2m thanh ng\u1ecdt ng\u00e0o, nh\u00ecn th\u1ea5y h\u00ecnh \u1ea3nh r\u00f5 n\u00e9t.<\/p>\n\n\n\n
Th\u01b0\u1eddng d\u00f9ng m\u00e1y VCD \u0111\u1ec3 chi\u1ebfu \u0111\u0129a VCD, c\u0169ng c\u00f3 th\u1ec3 ph\u1ed1i h\u1ee3p v\u1edbi m\u00e1y t\u00ednh c\u00f3 ph\u1ea7n m\u1ec1m t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 chi\u1ebfu VCD. M\u00e1y VCD ngo\u00e0i vi\u1ec7c c\u00f3 th\u1ec3 chi\u1ebfu \u0111\u0129a VCD c\u00f2n c\u00f3 th\u1ec3 ph\u00e1t \u0111\u0129a CD, nh\u01b0ng m\u00e1y CD chuy\u00ean d\u1ee5ng kh\u00f4ng th\u1ec3 ph\u00e1t \u0111\u0129a VCD.<\/p>\n\n\n\n
T\u1eeb kh\u00f3a: \u0110\u0129a VCD; T\u00edn hi\u1ec7u \u00e2m t\u1ea7n; T\u00edn hi\u1ec7u th\u1ecb t\u1ea7n; N\u00e9n; Gi\u1ea3i n\u00e9n.<\/p>\n","protected":false},"excerpt":{"rendered":"
VCD \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb CD. CD l\u00e0 m\u1ed9t lo\u1ea1i \u0111\u0129a quang l\u01b0u tr\u1eef t\u00edn hi\u1ec7u \u00e2m t\u1ea7n, th\u01b0\u1eddng g\u1ecdi l\u00e0 \u0111\u0129a h\u00e1t laze. N\u00f3 sau khi l\u1ea5y m\u1eabu t\u00edn hi\u1ec7u \u00e2m t\u1ea7n m\u00f4 ph\u1ecfng th\u00ec chuy\u1ec3n \u0111\u1ed5i th\u00e0nh t\u00edn hi\u1ec7u s\u1ed1 r\u1ed3i ch\u1ebf t\u1ea1o ra. Khi ch\u1ebf t\u1ea1o CD, ta ti\u1ebfn h\u00e0nh ghi s\u1ed1 […]<\/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-10398","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\/10398","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=10398"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10398\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}