| 摘要 |
In a system for enhancing the integrity of transmitted data files from one memory to a remotely located memory there is provided an original data stream which is compressed by a known data compression code. The compressed data stream (45) may be in a variable length format and is not provided with the usual parity code bits. To assure that compressed data is received both loss less and error free, the compressed data stream (45) is divided into blocks of N bytes. At the end of N bytes a check code (44) is inserted into the compressed data stream. The transmitted and received compressed data stream is processed as N blocks of bytes having a received block code (44). The received blocks of data are used to generate new block codes (44) which are compared with the transmitted block codes to determine if a one bit error has occurred in each block of N bytes. If an error occurs in the transmission of compressed data, the block (N) is not stored in the memory of the receiver and the transmitter must resend the entire block of N bytes until no error in transmission is detected. The same system for enhancing the integrity of a transmitted data file can be employed with data that is double data compressed and/or encrypted.
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