奇偶校验

Parity bit: A check bit added to a series of binary digit s to make the total odd or even according to the logic of the system.

奇偶校验：加于一组二进制数字内的一个校验数元。

The topics covered include the basic concepts of information theory--entropy, mutual information, channel capacity, information rate, Shannon's noiseless coding theorem and Shannon's fundamental coding theorem; modeling of information sources--zero-memory and Markov models; modeling of information channels--BSC and BEC channels, additivity of information and cascaded channels; construction of compact source codes--Kraft inequality, compact codes, Huffman and LZW compression codes; and analysis and design of error-control channel codes--Hamming distance, binary linear codes and the parity-check matrix, Hamming codes, checksum codes, cyclic codes and the generator polynomial and CRC codes.

课程的内容包括：信息论的基本概念（熵、交互信息、信道容量、信息率、 Shannon无噪声编码定理和Shannon基本编码定理）、信源模型（无记忆模型和Markov模型）、信息信道模型（BSC 和 BEC模型、信息的可加性和级联信道），紧致信源编码设计（Kraft不等式，紧致编码，Huffman 和LZW压缩编码）以及差错控制信道码的设计与分析（海明距离，二元线性码，奇偶校验矩阵，海明码，校验和，循环码，生成多项式和CRC码）。

If even parity is used, the total number of "1" bits in the block, including data bits and the parity bit, is set to be even with the help of the parity bit. In the case

假如用偶校验，1的总数包括数据位和奇偶校验位将放在这个块中，奇偶校验位的值决定要把其设置为偶数。

The redundant controller produces odd and even check code in setup time. After odd and even check code is calculated with Boolean function calculation, it is transformed into of Galois field. If the output of controller can satisfy odd and even check condition is checked with the function calculation to decide it exist fault or not.

该控制器在设定时间产生奇偶校验码，通过布尔函数逻辑运算转换成Galois域函数运算，检验其输出是否满足奇偶校验条件以判断是否存在故障。

If Odd Parity is used, the parity bit will be a 1, making an odd quantity.

如果便用了偶校验，帧的奇偶校验位将是0，便得整个"1"的个数仍是4个。

Of odd parity, the parity bit is set to "1" or "0" so that the total number of"1" bits in the block is odd.

假如是奇校验，奇偶校验位将被设置为1或0，使这个块的奇偶为奇。

Computer science a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's; e.g., if the parity is odd then any group of bits that arrives with an even number of 1's must contain an error

parity：简介奇偶校验位，在数据存储和传输中，字节中额外增加一个比特位，用来检验错误。它常常是从两个或更多的原始数据中产生一个冗余数据，冗余数据可以从一个原始数据中进行重建。不过，奇偶校验数。。。详情

When the received character has been assembled, its parity is calculated and compared with the received parity bit following the character.

当接收到的字符汇齐后，它的奇偶校验位就由计算得出并与接收到的奇偶校验位进行比较。

Second, to eliminate a special class of cycles in QC-LDPC codes, we considerQC-LDPC codes with circulant permutation matrices as protograph LDPC codes. Andwe reveal the relationship of cycles in a protograph LDPC code and its mother matrix.

其次，为了消除准循环低密度奇偶校验码中一类特殊的环，我们把由循环置换矩阵扩张得到的准循环低密度奇偶校验码看做一类原图低密度奇偶校验码。

A threshold adjustment algorithm qualifies candidate erasures based on a detector error filter output as well as modulation code constraint success/failure information, in particular parity check or failure as current modulation codes in disk drive applications use parity checks.

阈值调节算法根据检测器错误滤波输出和调制码限制的成功/失败信息来考核候选擦除，尤其是，作为在盘驱动器应用中的当前的调制码的奇偶校验或失败使用奇偶校验。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。