Error Correction Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6825   Accepted: 4289 Description A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set…

Error Correction Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6014   Accepted: 3886 Description A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set…

FEC(Forward Error Correction)前向纠错 UDP\RTP 中使用用于改善无线等网络丢包等问题 算法暂不介绍. 思路:FEC ENCODE 增加冗余包,当无线等网络丢包之后,接收端使用冗余包可将丢失的包DECODE出来. 举例:10个包,编码后会增加2个包,共12个包发送到接收端,接收端丢失第5和第9包,仅靠剩下的10个包就可以解出第5和第9包. 结果就是,接收端接收到了完整的10个包,代价仅仅是增加了冗余和cpu编解码的消耗. 参考: 1. RTP抗丢包传输方案 点击打…

Error Correction Time Limit: 2 Seconds      Memory Limit: 65536 KB A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set. Here's a 4 x 4 matrix which has the parity…

QR Code Error Correction - QRStuff.com https://blog.qrstuff.com/2011/12/14/qr-code-error-correction Information capacity and versions of QR Code | QRcode.com | DENSO WAVE https://www.qrcode.com/en/about/version.html So here are the take-outs: The low…

Description A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set. Here's a 4 x 4 matrix which has the parity property: 1 0 1 0 0 0 0 0 1 1 1 1 0 1 0 1 The sums of t…

#include <iostream> #define MAXN 100 using namespace std; int _m[MAXN][MAXN]; int main() { //freopen("acm.acm","r",stdin); int i; int j; int n; int sum; int code_r; int code_c; while(cin>>n,n) { code_r = -; code_c = -; ; i…

引用 跟一个网友就有关IPsec的网络加速以及降低延迟等问题进行了一些讨论,并总结了一写粗浅的看法. 因为FEC的资料并不多,所以分享出来,希望能被有需要的人看见:) 先说一下FEC. 我们使用ipsec的本质,就是在IP层之上建立一条软件的点到点通信链路.通过internet到底任意地方. 由于internet的广域性,或者传输介质或者距离的限制等,倒是数据包的丢失,损坏,高延迟扥各种问题. 对比于专线的方案.我们可是改善介质,做链路保障等提高服务质量. 那么在VirtualPN软件的层面上我…

Log 2016-3-21 网上找的POJ分类,来源已经不清楚了.百度能百度到一大把.贴一份在博客上,鞭策自己刷题,不能偷懒!! 初期: 一.基本算法: (1)枚举. (poj1753,poj2965) (2)贪心(poj1328,poj2109,poj2586) (3)递归和分治法. (4)递推. (5)构造法.(poj3295) (6)模拟法.(poj1068,poj2632,poj1573,poj2993,poj2996) 二.图算法: (1)图的深度优先遍历和广度优先遍历. (2)最短路…

初期:一.基本算法:     (1)枚举. (poj1753,poj2965)     (2)贪心(poj1328,poj2109,poj2586)     (3)递归和分治法.     (4)递推.     (5)构造法.(poj3295)     (6)模拟法.(poj1068,poj2632,poj1573,poj2993,poj2996)二.图算法:     (1)图的深度优先遍历和广度优先遍历.     (2)最短路径算法(dijkstra,bellman-ford,floyd,hea…