Information transmitting and receiving apparatus

An information transmitting and receiving apparatus comprising

• transmitting means for transmitting information in the form of sets of sequential information signals, each information signal including synchronizing signal, address signal and data signal portions and representing a segment of an information set;
• and
• receiving means for receiving transmitted information signals including first means for storing the data signal portion of a currently-received information signal;
• second means for separately storing the data signal portions of the previously-received information signals of the immediately-preceding information set;
• third means connected to said first means for comparing the data signal portion stored in said first means with a data signal portion stored in said second means;
• fourth means responsive to the synchronizing signal portions of said received information signals for reading out to said third means the stored data signal portion in said second means which corresponds to the same segment within an information set as the data signal portion stored in said first means;
• and fifth means responsive to said third means for providing a retransmission command signal when lack of comparison between data signal portions is detected by said third means.

A method for information transmitting and receiving in a system including at least one transmitter and a plurality of receivers comprising:

• sequentially transmitting a plurality of information signals each including a synchronizing signal, an address signal and a data signal;
• sequentially receiving said transmitted information signals in each of said receivers;
• comparing the data bits of a currently-received information signal including a certain address associated with the receiver with the data bits of a previously-received information signal including the same address;
• and
• if both sets of data bits are not coincident with each other, initiating retransmission of the information signal including the same address irrespective of the order of receipt of said information signals, thereby causing the information signal to be transmitted again by said transmitting means until data coincidence occurs at the receiver.