The error rate of book editing and proofreading represents the ratio of the number of mistakes in a book to the total number of words in the book.
Error rate is one of the important criteria for testing publications. According to the Book Quality Management Regulations adopted by the State Press and Publication Administration, books with an error rate less than110000 are qualified for editing and proofreading. Books whose error rate exceeds110000 are not qualified for editing and proofreading.
Bit error rate is the main index to measure the reliability of data communication system. There are three commonly used methods to express error rate: bit or symbol error rate, word error rate and packet error rate.
Its definition is to point out the proportion of wrong words to the total number of transmitted characters, that is, the probability of codeword error. In telegraph communication, the error rate is often used to evaluate the transmission quality of telegrams.
However, because the number of bits representing a character code is 5 units, 6 units and 8 units, a character string is counted as a word error regardless of whether one or more bits are wrong, so it is not very accurate to evaluate the transmission quality of data circuits by word error rate. ?
Error grouping rate
Its definition refers to the ratio of the number of code blocks with errors to the total number of transmission code blocks, that is, the probability of code block errors. In some data communication systems, the code group is transmitted as an information unit, and it is more intuitive to use the error group rate at this time.
From the above analysis, it can be seen that it is more appropriate to evaluate the transmission quality with the bit error rate, but from the application point of view, the word error rate and the group error rate are easier to understand, and it is also more convenient to compare the effect of error control from the output of the terminal equipment.