Picture signal retransmission system

  • Inventors: UEHARA MASARU
  • Assignees: Nec Corp
  • Publication Date: May 31, 1988
  • Publication Number: JP-S63127665-A


PURPOSE: To attain page retransmission with excellent transmission efficiency by retransmitting a picture signal to be transmitted again if an error takes place in a received data in the unit of blocked picture signals. CONSTITUTION: A picture signal read by an original read section 1 is fed to a coder 2 as a signal (a), and a coded picture signal is sent to a number addition section 3 as a signal (b). In applying decoding sequentially in the unit of scanning lines, if a scanning line in error takes place, n-set of scanning lines correspond to a block number and if the scanning line of the p-set of lines having one or more of errors exists, a block number in error and an address written with the block number are written in the common area of a memory circuit 7 as the signal (n). When the decoding is finished, the signal is read from the common area of the memory circuit 7, sent to the transmission side to retransmit the block. COPYRIGHT: (C)1988,JPO&Japio




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