{"id":478251,"date":"2023-08-09T09:29:44","date_gmt":"2023-08-09T09:29:44","guid":{"rendered":""},"modified":"2023-09-05T11:16:22","modified_gmt":"2023-09-05T11:16:22","slug":"odd-parity","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/odd-parity\/","title":{"rendered":"Ch\u1eb5n l\u1ebb l\u1ebb"},"content":{"rendered":"<p>T\u00ednh ch\u1eb5n l\u1ebb l\u1ebb l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u00ednh to\u00e1n v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ed5ng s\u1ed1 1 trong m\u1ed9t t\u1eadp h\u1ee3p bit nh\u1ea5t \u0111\u1ecbnh l\u00e0 s\u1ed1 l\u1ebb, th\u00eam m\u1ed9t &#039;bit ch\u1eb5n l\u1ebb&#039; b\u1ed5 sung n\u1ebfu c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m cho s\u1ed1 \u0111\u1ebfm tr\u1edf th\u00e0nh s\u1ed1 l\u1ebb. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a t\u00ednh ch\u1eb5n l\u1ebb k\u1ef3 l\u1ea1 v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>Kh\u00e1i ni\u1ec7m ch\u1eb5n l\u1ebb l\u1ebb c\u00f3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a khoa h\u1ecdc vi\u1ec5n th\u00f4ng v\u00e0 m\u00e1y t\u00ednh. N\u00f3 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c tri\u1ec3n khai trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n b\u00e1o v\u00e0o nh\u1eefng n\u0103m 1940 v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh \u0111\u1ea7u ti\u00ean v\u00e0o nh\u1eefng n\u0103m 1950.<\/p>\n<p>Richard W. Hamming, m\u1ed9t nh\u00e0 to\u00e1n h\u1ecdc ng\u01b0\u1eddi M\u1ef9, th\u01b0\u1eddng \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 ng\u01b0\u1eddi \u0111\u00e3 ch\u00ednh th\u1ee9c h\u00f3a vi\u1ec7c ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb, bao g\u1ed3m c\u1ea3 t\u00ednh ch\u1eb5n l\u1ebb v\u00e0 s\u1ed1 l\u1ebb. C\u00f4ng tr\u00ecnh c\u1ee7a \u00f4ng \u0111\u00e3 \u0111\u1eb7t n\u1ec1n m\u00f3ng cho c\u00e1c m\u00e3 s\u1eeda l\u1ed7i, v\u1ed1n v\u1eabn r\u1ea5t c\u1ea7n thi\u1ebft trong m\u00e1y t\u00ednh v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1<\/h2>\n<p>T\u00ednh ch\u1eb5n l\u1ebb l\u1ebb ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch \u0111\u1ebfm s\u1ed1 1 trong chu\u1ed7i d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n. N\u1ebfu s\u1ed1 \u0111\u00f3 l\u00e0 s\u1ed1 ch\u1eb5n, m\u1ed9t bit ch\u1eb5n l\u1ebb c\u00f3 gi\u00e1 tr\u1ecb 1 s\u1ebd \u0111\u01b0\u1ee3c th\u00eam v\u00e0o \u0111\u1ec3 t\u1ea1o th\u00e0nh t\u1ed5ng s\u1ed1 1 l\u00e0 s\u1ed1 l\u1ebb. N\u1ebfu s\u1ed1 1 \u0111\u00e3 l\u00e0 s\u1ed1 l\u1ebb th\u00ec bit ch\u1eb5n l\u1ebb \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh 0.<\/p>\n<h3>V\u00ed d\u1ee5:<\/h3>\n<ul>\n<li>D\u1eef li\u1ec7u g\u1ed1c: <code data-no-translation=\"\">11010<\/code><\/li>\n<li>S\u1ed1 s\u1ed1 1: 3 (l\u1ebb)<\/li>\n<li>Bit ch\u1eb5n l\u1ebb: <code data-no-translation=\"\">0<\/code><\/li>\n<li>D\u1eef li\u1ec7u c\u00f3 t\u00ednh ch\u1eb5n l\u1ebb: <code data-no-translation=\"\">110100<\/code><\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb: T\u00ednh ch\u1eb5n l\u1ebb l\u1ebb ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>Ch\u1ee9c n\u0103ng ch\u1eb5n l\u1ebb l\u1ebb th\u00f4ng qua vi\u1ec7c th\u00eam bit ch\u1eb5n l\u1ebb v\u00e0o d\u1eef li\u1ec7u g\u1ed1c, nh\u01b0 trong v\u00ed d\u1ee5 tr\u01b0\u1edbc. Ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn ph\u1ea3i \u0111\u1ed3ng \u00fd s\u1eed d\u1ee5ng t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb. \u0110\u00e2y l\u00e0 c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng:<\/p>\n<ol>\n<li><strong>Ph\u00eda ng\u01b0\u1eddi g\u1eedi<\/strong>: Ng\u01b0\u1eddi g\u1eedi \u0111\u1ebfm s\u1ed1 1 trong d\u1eef li\u1ec7u. N\u1ebfu n\u00f3 ch\u1eb5n, bit ch\u1eb5n l\u1ebb b\u1eb1ng 1 s\u1ebd \u0111\u01b0\u1ee3c th\u00eam v\u00e0o; n\u1ebfu l\u1ebb, bit ch\u1eb5n l\u1ebb b\u1eb1ng 0 s\u1ebd \u0111\u01b0\u1ee3c th\u00eam v\u00e0o.<\/li>\n<li><strong>Qu\u00e1 tr\u00ecnh l\u00e2y truy\u1ec1n<\/strong>: D\u1eef li\u1ec7u, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn ng\u01b0\u1eddi nh\u1eadn.<\/li>\n<li><strong>Ph\u00eda ng\u01b0\u1eddi nh\u1eadn<\/strong>: B\u1ed9 thu \u0111\u1ebfm s\u1ed1 l\u01b0\u1ee3ng 1, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb. N\u1ebfu t\u1ed5ng s\u1ed1 l\u00e0 ch\u1eb5n th\u00ec s\u1ebd ph\u00e1t hi\u1ec7n ra l\u1ed7i.<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb<\/h2>\n<ul>\n<li><strong>Ph\u00e1t hi\u1ec7n l\u1ed7i<\/strong>: C\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i bit \u0111\u01a1n.<\/li>\n<li><strong>S\u1ef1 \u0111\u01a1n gi\u1ea3n<\/strong>: D\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u1ea7n c\u1ee9ng ho\u1eb7c ph\u1ea7n m\u1ec1m.<\/li>\n<li><strong>gi\u1edbi h\u1ea1n<\/strong>: Kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i hai bit ho\u1eb7c x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed l\u1ed7i.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i ch\u1eb5n l\u1ebb l\u1ebb: S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft<\/h2>\n<p>Kh\u00f4ng c\u00f3 \u201clo\u1ea1i\u201d ch\u1eb5n l\u1ebb l\u1ebb c\u1ee5 th\u1ec3 n\u00e0o, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai theo nhi\u1ec1u c\u00e1ch v\u00e0 h\u1ec7 th\u1ed1ng kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Vi\u1ec5n th\u00f4ng<\/td>\n<td>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e1t hi\u1ec7n l\u1ed7i trong truy\u1ec1n d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 nh\u1edb m\u00e1y t\u00ednh<\/td>\n<td>\u1ee8ng d\u1ee5ng trong RAM \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef<\/td>\n<\/tr>\n<tr>\n<td>L\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/td>\n<td>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u1ed5 c\u1ee9ng, CD-ROM, v.v., \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>T\u00ednh ch\u1eb5n l\u1ebb l\u1ebb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i, nh\u01b0ng n\u00f3 c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf:<\/p>\n<ul>\n<li><strong>V\u1ea5n \u0111\u1ec1<\/strong>: Kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i nhi\u1ec1u bit.\n<ul>\n<li><strong>Gi\u1ea3i ph\u00e1p<\/strong>: S\u1eed d\u1ee5ng c\u00e1c m\u00e3 s\u1eeda l\u1ed7i n\u00e2ng cao h\u01a1n.<\/li>\n<\/ul>\n<\/li>\n<li><strong>V\u1ea5n \u0111\u1ec1<\/strong>: Kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u1ed7i.\n<ul>\n<li><strong>Gi\u1ea3i ph\u00e1p<\/strong>: Th\u1ef1c hi\u1ec7n c\u00e1c thu\u1eadt to\u00e1n s\u1eeda l\u1ed7i.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 nh\u1eefng so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>So s\u00e1nh gi\u1eefa ch\u1eb5n l\u1ebb v\u00e0 ch\u1eb5n l\u1ebb:<\/p>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>Ch\u1eb5n l\u1ebb l\u1ebb<\/th>\n<th>Ch\u1eb5n l\u1ebb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>S\u1ed1 1<\/td>\n<td>S\u1ed1 l\u1ebb<\/td>\n<td>Th\u1eadm ch\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n l\u1ed7i<\/td>\n<td>Bit \u0111\u01a1n<\/td>\n<td>Bit \u0111\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn t\u00ednh ch\u1eb5n l\u1ebb k\u1ef3 l\u1ea1<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi c\u00e1c m\u00e3 s\u1eeda l\u1ed7i n\u00e2ng cao h\u01a1n. Nh\u1eefng ti\u1ebfn b\u1ed9 trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 v\u00e0 m\u1ea1nh m\u1ebd h\u01a1n \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i, k\u1ebft h\u1ee3p t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb v\u1edbi c\u00e1c thu\u1eadt to\u00e1n kh\u00e1c.<\/p>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb<\/h2>\n<p>Trong b\u1ed1i c\u1ea3nh m\u00e1y ch\u1ee7 proxy, t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n. C\u00e1c m\u00e1y ch\u1ee7 proxy x\u1eed l\u00fd vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u00ednh ch\u1eb5n l\u1ebb l\u1ebb \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong c\u00e1c g\u00f3i d\u1eef li\u1ec7u, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a k\u1ebft n\u1ed1i.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/example.com\/hamming-codes\" target=\"_new\" rel=\"noopener nofollow\">M\u00e3 Hamming: Gi\u1edbi thi\u1ec7u v\u1ec1 M\u00e3 s\u1eeda l\u1ed7i<\/a><\/li>\n<li><a href=\"https:\/\/example.com\/ieee-parity\" target=\"_new\" rel=\"noopener nofollow\">Ti\u00eau chu\u1ea9n IEEE \u0111\u1ec3 ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">OneProxy: \u0110\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/a><\/li>\n<\/ul>","protected":false},"featured_media":478252,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478251","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Odd Parity<\/mark>","faq_items":[{"question":"What is Odd Parity and where is it used?","answer":"<p>Odd parity is a method used for error detection in binary data transmission. It ensures that the total number of 1's in a given set of bits is odd by adding a 'parity bit' if needed. It is widely used in telecommunications, computer memory, and various data storage devices.<\/p>"},{"question":"Who is credited with formalizing the concept of parity checks?","answer":"<p>Richard W. Hamming, an American mathematician, is often credited with formalizing parity checks, including odd and even parity. His work laid the foundation for error detection and correction.<\/p>"},{"question":"How does Odd Parity work, and can it detect all errors?","answer":"<p>Odd parity works by adding a parity bit to make the total number of 1's in a binary sequence odd. It can detect single-bit errors but cannot detect multi-bit errors or identify the location of an error.<\/p>"},{"question":"What is the difference between Odd Parity and Even Parity?","answer":"<p>Odd parity ensures an odd number of 1's in the data sequence, whereas even parity ensures an even number. Both are used for single-bit error detection, but they use different rules for adding the parity bit.<\/p>"},{"question":"How is Odd Parity related to proxy servers like OneProxy?","answer":"<p>Odd parity can be implemented in proxy servers to ensure data integrity during transmission. Proxy servers handling data transfer might use odd parity to detect errors in the data packets, enhancing connection reliability.<\/p>"},{"question":"Are there any limitations to Odd Parity, and how can they be overcome?","answer":"<p>Yes, odd parity has limitations. It cannot detect two-bit errors or locate the error. More advanced error-correcting codes and algorithms can be implemented to overcome these limitations.<\/p>"},{"question":"What are the future perspectives and technologies related to Odd Parity?","answer":"<p>Odd parity continues to be relevant and may be combined with more advanced error-detecting and correcting methods in the future. The evolution of technology may lead to more efficient and robust solutions related to error detection.<\/p>"},{"question":"How can I learn more about Odd Parity and its applications?","answer":"<p>You can refer to resources like the introduction to Hamming Codes, IEEE standards for parity checks, or visit the OneProxy website for more specific information on how it ensures data integrity. Links to these resources are provided in the article.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478251","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\/478251\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/478252"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}