{"id":41815,"date":"2025-07-15T03:09:42","date_gmt":"2025-07-15T03:09:42","guid":{"rendered":"https:\/\/staging.pageloot.com\/uncategorized\/how-error-correction-works-in-editable-qr-codes\/"},"modified":"2026-04-22T13:14:09","modified_gmt":"2026-04-22T13:14:09","slug":"how-error-correction-works-in-editable-qr-codes","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/blog\/how-error-correction-works-in-editable-qr-codes\/","title":{"rendered":"C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u00ednh n\u0103ng s\u1eeda l\u1ed7i m\u00e3 QR \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft k\u1ebf th\u01b0\u01a1ng hi\u1ec7u"},"content":{"rendered":"<p class=\"wp-block-paragraph\">B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi li\u1ec7u vi\u1ec7c th\u00eam logo v\u00e0o m\u00e3 QR c\u1ee7a m\u00ecnh c\u00f3 ng\u0103n c\u1ea3n n\u00f3 qu\u00e9t \u0111\u00fang c\u00e1ch kh\u00f4ng? M\u1ed9t m\u00e3 b\u1ecb l\u1ed7i tr\u00ean chi\u1ebfn d\u1ecbch in \u1ea5n \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c m\u1ea5t t\u01b0\u01a1ng t\u00e1c v\u00e0 l\u00e3ng ph\u00ed ng\u00e2n s\u00e1ch. Hi\u1ec3u c\u00e1c c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i cho ph\u00e9p b\u1ea1n c\u00e2n b\u1eb1ng gi\u1eefa thi\u1ebft k\u1ebf b\u1eaft m\u1eaft v\u00e0 kh\u1ea3 n\u0103ng qu\u00e9t \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">S\u1eeda l\u1ed7i m\u00e3 QR l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eeda l\u1ed7i l\u00e0 m\u1ed9t t\u00ednh n\u0103ng k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean thu\u1eadt to\u00e1n Reed-Solomon cho ph\u00e9p m\u00e1y qu\u00e9t t\u00e1i t\u1ea1o d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu ho\u1eb7c b\u1ecb bi\u1ebfn d\u1ea1ng. H\u1ec7 th\u1ed1ng n\u00e0y th\u00eam th\u00f4ng tin d\u1ef1 ph\u00f2ng \u2013 v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 d\u1eef li\u1ec7u \u201csao l\u01b0u\u201d \u2013 v\u00e0o m\u00e3. N\u1ebfu m\u1ed9t ph\u1ea7n c\u1ee7a m\u1eabu b\u1ecb che khu\u1ea5t b\u1edfi logo, b\u1ee5i b\u1ea9n ho\u1eb7c h\u01b0 h\u1ecfng v\u1eadt l\u00fd, m\u00e1y qu\u00e9t s\u1ebd s\u1eed d\u1ee5ng c\u00e1c b\u1ea3n sao l\u01b0u n\u00e0y \u0111\u1ec3 \u201c\u0111o\u00e1n\u201d v\u00e0 \u0111i\u1ec1n v\u00e0o c\u00e1c ph\u1ea7n b\u1ecb thi\u1ebfu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y h\u00ecnh dung m\u00e1y qu\u00e9t gi\u1ed1ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi \u0111\u1ecdc t\u1ed1c \u0111\u1ed9 cao v\u1eabn c\u00f3 th\u1ec3 hi\u1ec3u m\u1ed9t c\u00e2u ngay c\u1ea3 khi m\u1ed9t v\u00e0i ch\u1eef c\u00e1i b\u1ecb nh\u00f2e. Kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i n\u00e0y l\u00e0 \u0111i\u1ec1u gi\u00fap t\u1ea1o ra <a href=\"https:\/\/pageloot.com\/vi\/how-to\/custom-qr-code\/\">m\u00e3 QR t\u00f9y ch\u1ec9nh<\/a> nh\u1eefng m\u00e3 c\u00f3 h\u00ecnh d\u1ea1ng \u0111\u1ed9c \u0111\u00e1o ho\u1eb7c m\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng li\u00ean k\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ed1n c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 QR s\u1eed d\u1ee5ng b\u1ed1n c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i ti\u00eau chu\u1ea9n (ECC), m\u1ed7i c\u1ea5p \u0111\u1ed9 cung c\u1ea5p m\u1ed9t m\u1ee9c \u0111\u1ed9 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i kh\u00e1c nhau. Khi b\u1ea1n chuy\u1ec3n t\u1eeb C\u1ea5p \u0111\u1ed9 L sang C\u1ea5p \u0111\u1ed9 H, m\u00e3 tr\u1edf n\u00ean b\u1ec1n h\u01a1n nh\u01b0ng c\u0169ng d\u00e0y \u0111\u1eb7c h\u01a1n v\u1ec1 m\u1eb7t v\u1eadt l\u00fd v\u00ec n\u00f3 y\u00eau c\u1ea7u nhi\u1ec1u m\u00f4-\u0111un h\u01a1n (c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf) \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u ph\u1ee5c h\u1ed3i b\u1ed5 sung.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"wp-block-table__content\">\n<thead>\n<tr>\n<th>C\u1ea5p \u0111\u1ed9<\/th>\n<th>Kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i<\/th>\n<th>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>C\u1ea5p \u0111\u1ed9 L (Th\u1ea5p)<\/strong><\/td>\n<td>Kho\u1ea3ng 7%<\/td>\n<td>M\u00e0n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 b\u1ea3n in s\u1ea1ch, \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao.<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ea5p \u0111\u1ed9 M (Trung b\u00ecnh)<\/strong><\/td>\n<td>Kho\u1ea3ng 15%<\/td>\n<td>T\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb ti\u00eau chu\u1ea9n nh\u01b0 t\u1edd r\u01a1i ho\u1eb7c th\u1ef1c \u0111\u01a1n.<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ea5p \u0111\u1ed9 Q (T\u1ee9 ph\u00e2n v\u1ecb)<\/strong><\/td>\n<td>Kho\u1ea3ng 25%<\/td>\n<td>M\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p ho\u1eb7c bao b\u00ec d\u1ec5 b\u1ecb m\u00e0i m\u00f2n.<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ea5p \u0111\u1ed9 H (Cao)<\/strong><\/td>\n<td>Kho\u1ea3ng 30%<\/td>\n<td>M\u00e3 c\u00f3 th\u01b0\u01a1ng hi\u1ec7u v\u1edbi logo l\u1edbn ho\u1eb7c bi\u1ec3n b\u00e1o ngo\u00e0i tr\u1eddi.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi b\u1ea1n <a href=\"https:\/\/pageloot.com\/vi\/how-to\/understand-qr-code-data-limits\/\">hi\u1ec3u gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u c\u1ee7a m\u00e3 QR<\/a>, b\u1ea1n s\u1ebd th\u1ea5y m\u1ed9t s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i r\u00f5 r\u00e0ng: kh\u1ea3 n\u0103ng s\u1eeda l\u1ed7i cao h\u01a1n l\u00e0m gi\u1ea3m t\u1ed5ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng b\u1ea1n c\u00f3 th\u1ec3 l\u01b0u tr\u1eef trong c\u00f9ng m\u1ed9t kh\u00f4ng gian. V\u00ed d\u1ee5, m\u1ed9t m\u00e3 QR Phi\u00ean b\u1ea3n 1 \u1edf C\u1ea5p \u0111\u1ed9 L c\u00f3 th\u1ec3 ch\u1ee9a 41 k\u00fd t\u1ef1 s\u1ed1, nh\u01b0ng \u1edf C\u1ea5p \u0111\u1ed9 H, dung l\u01b0\u1ee3ng \u0111\u00f3 gi\u1ea3m xu\u1ed1ng c\u00f2n 19 k\u00fd t\u1ef1 \u0111\u1ec3 nh\u01b0\u1eddng ch\u1ed7 cho d\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/03\/simple-clean-infographic-square-1-1-layout-on-white-background-black-text-with-6335-02008c540757.webp\" alt=\"M\u1ee9c \u0111\u1ed9 s\u1eeda l\u1ed7i QR\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao s\u1eeda l\u1ed7i l\u1ea1i c\u1ea7n thi\u1ebft cho m\u00e3 QR c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ti\u1ebfp th\u1ecb k\u1ef9 thu\u1eadt s\u1ed1, s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa s\u1eeda l\u1ed7i v\u00e0 <a href=\"https:\/\/pageloot.com\/vi\/how-to\/edit-qr-codes\/\">m\u00e3 QR c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda<\/a> l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf l\u1edbn. C\u00e1c m\u00e3 \u201c\u0111\u1ed9ng\u201d n\u00e0y kh\u00f4ng l\u01b0u tr\u1eef m\u1ed9t URL d\u00e0i, ph\u1ee9c t\u1ea1p tr\u1ef1c ti\u1ebfp trong m\u1eabu. Thay v\u00e0o \u0111\u00f3, ch\u00fang m\u00e3 h\u00f3a m\u1ed9t li\u00ean k\u1ebft chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn. V\u00ec d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a ng\u1eafn, c\u00e1c m\u00f4-\u0111un v\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn v\u00e0 d\u1ec5 qu\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebft k\u1ebf \u201cs\u1ea1ch h\u01a1n\u201d n\u00e0y cho ph\u00e9p b\u1ea1n s\u1eed d\u1ee5ng m\u1ee9c s\u1eeda l\u1ed7i cao nh\u1ea5t (C\u1ea5p \u0111\u1ed9 H) m\u00e0 kh\u00f4ng l\u00e0m cho c\u00e1c m\u00f4-\u0111un qu\u00e1 nh\u1ecf \u0111\u1ed1i v\u1edbi camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh c\u0169 h\u01a1n. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>  T\u1ef1 do thi\u1ebft k\u1ebf cao h\u01a1n \u0111\u1ec3 \u0111\u1eb7t c\u00e1c y\u1ebfu t\u1ed1 th\u01b0\u01a1ng hi\u1ec7u v\u00e0o trung t\u00e2m m\u00e3.<\/li>\n<li>  T\u0103ng kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i cho c\u00e1c \u00e1p ph\u00edch ngo\u00e0i tr\u1eddi c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u00e1nh s\u00e1ng ch\u00f3i ho\u1eb7c v\u1ebft tr\u1ea7y x\u01b0\u1edbc v\u1eadt l\u00fd.<\/li>\n<li>  T\u1ed1c \u0111\u1ed9 qu\u00e9t nhanh h\u01a1n v\u00ec m\u1eabu c\u01a1 b\u1ea3n \u00edt ph\u1ee9c t\u1ea1p h\u01a1n so v\u1edbi m\u00e3 t\u0129nh.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng \u0111\u1ed9ng l\u00e0 m\u1ed9t ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-optimize-qr-codes-for-mobile-scanning\/\">t\u1ed1i \u01b0u h\u00f3a qu\u00e9t di \u0111\u1ed9ng<\/a> v\u00ec n\u00f3 gi\u1eef cho m\u00e3 ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi URL \u0111\u00edch thay \u0111\u1ed5i sau n\u00e0y.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>N\u1ebfu b\u1ea1n c\u1ea7n \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf c\u1ee7a m\u00ecnh v\u1eabn c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c trong khi theo d\u00f5i hi\u1ec7u su\u1ea5t, h\u00e3y s\u1eed d\u1ee5ng <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">Tr\u00ecnh t\u1ea1o m\u00e3 QR \u0111\u1ed9ng c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u00e3 c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 th\u01b0\u01a1ng hi\u1ec7u.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2n b\u1eb1ng gi\u1eefa T\u00f9y ch\u1ec9nh v\u00e0 Kh\u1ea3 n\u0103ng Qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 s\u1eeda l\u1ed7i cung c\u1ea5p m\u1ed9t m\u1ea1ng l\u01b0\u1edbi an to\u00e0n, nh\u01b0ng n\u00f3 kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c m\u1ecdi l\u1ed7i thi\u1ebft k\u1ebf. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng m\u1ecdi l\u00fac, b\u1ea1n ph\u1ea3i k\u1ebft h\u1ee3p m\u1ee9c ECC ph\u00f9 h\u1ee3p v\u1edbi <a href=\"https:\/\/pageloot.com\/vi\/blog\/best-practices-for-qr-code-readability\/\">th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng \u0111\u1ecdc<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u00eam Logo m\u1ed9t c\u00e1ch An to\u00e0n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi b\u1ea1n <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-add-logos-to-qr-codes\/\">th\u00eam logo v\u00e0o m\u00e3 QR<\/a>, m\u00e1y qu\u00e9t coi logo \u0111\u00f3 l\u00e0 \u201ch\u01b0 h\u1ecfng\u201d ho\u1eb7c l\u1ed7i. \u0110\u1ec3 b\u00f9 \u0111\u1eafp, b\u1ea1n n\u00ean lu\u00f4n \u0111\u1eb7t m\u1ee9c s\u1eeda l\u1ed7i c\u1ee7a m\u00ecnh th\u00e0nh C\u1ea5p Q ho\u1eb7c C\u1ea5p H. \u0110\u1ea3m b\u1ea3o logo c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c c\u0103n gi\u1eefa v\u00e0 kh\u00f4ng che ba \u00f4 vu\u00f4ng \u0111\u1ecbnh v\u1ecb l\u1edbn \u1edf c\u00e1c g\u00f3c, v\u00ec nh\u1eefng \u00f4 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 m\u00e1y qu\u00e9t \u0111\u1ecbnh h\u01b0\u1edbng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Duy tr\u00ec \u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n M\u00e0u s\u1eafc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eeda l\u1ed7i kh\u00f4ng th\u1ec3 gi\u00fap \u00edch n\u1ebfu m\u00e1y qu\u00e9t kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c m\u00f4-\u0111un v\u00e0 n\u1ec1n. Lu\u00f4n tu\u00e2n theo <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/\">c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc<\/a> b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u1ec1n t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng. T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n \u00edt nh\u1ea5t 4:1 \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 v\u1eabn c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ea3o v\u1ec7 V\u00f9ng Y\u00ean t\u0129nh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cV\u00f9ng Y\u00ean t\u0129nh\u201d l\u00e0 \u0111\u01b0\u1eddng vi\u1ec1n tr\u1ed1ng bao quanh m\u00e3 QR. S\u1eeda l\u1ed7i kh\u00f4ng bao g\u1ed3m khu v\u1ef1c n\u00e0y. Ti\u00eau chu\u1ea9n ISO quy \u0111\u1ecbnh r\u1eb1ng \u0111\u01b0\u1eddng vi\u1ec1n n\u00e0y ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un. N\u1ebfu b\u1ea1n \u0111\u1eb7t v\u0103n b\u1ea3n, \u0111\u1ed3 h\u1ecda ho\u1eb7c m\u00e9p trang qu\u00e1 g\u1ea7n m\u00e3, m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn ra m\u1eabu.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/03\/simple-flat-illustration-square-1-1-white-background-with-black-text-and-blue-1032-dd53134a8b16.webp\" alt=\"V\u00f9ng y\u00ean t\u0129nh c\u1ee7a m\u00e3 QR\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">H\u01b0\u1edbng d\u1eabn cho c\u00e1c T\u00ecnh hu\u1ed1ng kh\u00e1c nhau<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ch\u1ecdn c\u1ea5p \u0111\u1ed9 ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng m\u00e0 m\u00e3 c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb v\u00e0 m\u1ee9c \u0111\u1ed9 hao m\u00f2n m\u00e0 n\u00f3 c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>  <strong>\u0110\u1ed1i v\u1edbi \u00c1p ph\u00edch v\u00e0 B\u1ea3ng hi\u1ec7u Ngo\u00e0i tr\u1eddi<\/strong>: S\u1eed d\u1ee5ng C\u1ea5p \u0111\u1ed9 H. C\u00e1c m\u00e3 n\u00e0y ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi \u00e1nh n\u1eafng m\u1eb7t tr\u1eddi, b\u1ee5i b\u1ea9n v\u00e0 kh\u1ea3 n\u0103ng b\u1ecb ph\u00e1 ho\u1ea1i, v\u00ec v\u1eady t\u1ef7 l\u1ec7 ph\u1ee5c h\u1ed3i 30% l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec chi\u1ebfn d\u1ecbch ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li>  <strong>\u0110\u1ed1i v\u1edbi Bao b\u00ec S\u1ea3n ph\u1ea9m<\/strong>: S\u1eed d\u1ee5ng C\u1ea5p \u0111\u1ed9 Q. Bao b\u00ec th\u01b0\u1eddng b\u1ecb tr\u1ea7y x\u01b0\u1edbc trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n ho\u1eb7c \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u01b0\u1eddng xuy\u00ean, khi\u1ebfn t\u1ef7 l\u1ec7 ph\u1ee5c h\u1ed3i 25% tr\u1edf th\u00e0nh m\u1ed9t l\u1ef1a ch\u1ecdn an to\u00e0n.<\/li>\n<li>  <strong>\u0110\u1ed1i v\u1edbi M\u00e0n h\u00ecnh K\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 TV<\/strong>: S\u1eed d\u1ee5ng C\u1ea5p \u0111\u1ed9 L ho\u1eb7c M. V\u00ec m\u00e0n h\u00ecnh kh\u00f4ng b\u1ecb hao m\u00f2n v\u1eadt l\u00fd, c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n gi\u00fap m\u00e3 \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng, \u0111i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u00f3i m\u00e0n h\u00ecnh ho\u1eb7c \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p.<\/li>\n<li>  <strong>\u0110\u1ed1i v\u1edbi Danh thi\u1ebfp<\/strong>: S\u1eed d\u1ee5ng C\u1ea5p \u0111\u1ed9 M ho\u1eb7c Q. M\u1eb7c d\u00f9 nh\u1eefng th\u1ee9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, k\u00edch th\u01b0\u1edbc nh\u1ecf c\u1ee7a b\u1ea3n in \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb m\u1ed9t ch\u00fat d\u1ef1 ph\u00f2ng b\u1ed5 sung.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-d15240fd95ef\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 thay \u0111\u1ed5i c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i sau khi in m\u00e3 QR kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng, c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i l\u00e0 m\u1ed9t ph\u1ea7n v\u0129nh vi\u1ec5n c\u1ee7a m\u1eabu v\u1eadt l\u00fd. N\u1ebfu b\u1ea1n c\u1ea7n thay \u0111\u1ed5i c\u1ea5p \u0111\u1ed9, b\u1ea1n ph\u1ea3i t\u1ea1o m\u1ed9t h\u00ecnh \u1ea3nh m\u00e3 QR m\u1edbi. Tuy nhi\u00ean, n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng m\u00e3 \u0111\u1ed9ng, b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 c\u1eadp nh\u1eadt li\u00ean k\u1ebft \u0111\u00edch m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i m\u1eabu \u0111\u00e3 in.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-63d672429f0b\"><strong class=\"schema-faq-question\">C\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i cao h\u01a1n c\u00f3 l\u00e0m cho m\u00e3 QR l\u1edbn h\u01a1n v\u1ec1 m\u1eb7t v\u1eadt l\u00fd kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u1ea5p \u0111\u1ed9 cao h\u01a1n l\u00e0m t\u0103ng m\u1eadt \u0111\u1ed9 c\u1ee7a c\u00e1c m\u00f4-\u0111un trong m\u00e3, khi\u1ebfn ch\u00fang nh\u1ecf h\u01a1n v\u00e0 nhi\u1ec1u h\u01a1n. M\u1eb7c d\u00f9 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a m\u00e3 c\u00f3 th\u1ec3 gi\u1eef nguy\u00ean, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n in n\u00f3 l\u1edbn h\u01a1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e1y \u1ea3nh v\u1eabn c\u00f3 th\u1ec3 nh\u00ecn r\u00f5 c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf h\u01a1n.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-785814395492\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 che bao nhi\u00eau ph\u1ea7n m\u00e3 QR c\u1ee7a m\u00ecnh b\u1eb1ng logo?<\/strong> <p class=\"schema-faq-answer\">At Level H, you can technically cover up to 30% of the code. For the most reliable results, it is best to keep the logo centered and cover no more than 25% of the area to leave some &#8220;budget&#8221; for real-world issues like smudges or poor lighting. Ready to build a reliable, branded QR code for your next campaign? Use our Link QR Code Generator to create a customized code that scans perfectly every time.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch s\u1eeda l\u1ed7i m\u00e3 QR gi\u00fap c\u00e1c thi\u1ebft k\u1ebf c\u00f3 th\u01b0\u01a1ng hi\u1ec7u v\u1eabn c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c. Hi\u1ec3u b\u1ed1n c\u1ea5p \u0111\u1ed9 ECC v\u00e0 c\u00e1ch ch\u00fang b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u trong m\u00e3 QR t\u00f9y ch\u1ec9nh v\u00e0 c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda.<\/p>","protected":false},"author":17,"featured_media":50400,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2635],"tags":[],"class_list":["post-41815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How QR Code Error Correction Works for Branded Designs<\/title>\n<meta name=\"description\" content=\"Learn how QR code error correction keeps branded designs scannable. 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Understand the four ECC levels and how they protect data in custom and editable QR codes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pageloot.com\/vi\/blog\/how-error-correction-works-in-editable-qr-codes\/\" \/>\n<meta property=\"og:site_name\" content=\"Pageloot\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pageloot\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-15T03:09:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-22T13:14:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/03\/photorealistic-lifestyle-hero-image-for-a-blog-article-about-qr-code-error-corre-3960-5daa2f25b5f3.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1408\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Siim T\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@getpageloot\" \/>\n<meta name=\"twitter:site\" content=\"@getpageloot\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Siim T\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/\"},\"author\":{\"name\":\"Siim T\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#\\\/schema\\\/person\\\/fa28992c2e52546f0812833bac852dfe\"},\"headline\":\"How QR Code Error Correction Works for Branded Designs\",\"datePublished\":\"2025-07-15T03:09:42+00:00\",\"dateModified\":\"2026-04-22T13:14:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/\"},\"wordCount\":1069,\"publisher\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pageloot.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/photorealistic-lifestyle-hero-image-for-a-blog-article-about-qr-code-error-corre-3960-5daa2f25b5f3.webp\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"vi\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/\",\"url\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/\",\"name\":\"How QR Code Error Correction Works for Branded Designs\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-error-correction-works-in-editable-qr-codes\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pageloot.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/photorealistic-lifestyle-hero-image-for-a-blog-article-about-qr-code-error-corre-3960-5daa2f25b5f3.webp\",\"datePublished\":\"2025-07-15T03:09:42+00:00\",\"dateModified\":\"2026-04-22T13:14:09+00:00\",\"description\":\"Learn how QR code error correction keeps branded designs scannable. 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