| 摘要 |
<p>PURPOSE:To improve transmission efficiency, by dividing a data text into plural blocks, adding and sending an error detection code on every block, designating the block in which an error is detected, and sending again only the block in which the error is generated. CONSTITUTION:It is assumed that a transmission text is divided into, for example, 32 blocks. And it is sent after the identification number of the block and the error detecting code (BCC) are attached on every block. A reception side checks a transmission/reception text at every block, and when the error is detected, returns the list of the identification number of the block. A transmission side recovers the error by sending a re-transmission text consisting of only a data block in which the error is generated. Hereafter, the above re- transmission procedure is repeated until a text without the error is received. Thus, by re-sending only the data block in which the error is generated, it is possible to perform the transmission of picture data with superior efficiency.</p> |
