Patent ID: 7113906

Claim:
A transmission-reception system for transmitting and receiving digital data, which must be transmitted divisionally in a plural number of times and do not admit a miss thereof, on the real time basis, comprising: a transmission apparatus including; division means for dividing the digital data into a predetermined number of data units of an equal size, information addition means for adding, to that one of the transmission data units obtained by the division of the digital data by said division which is to be transmitted first, information representing that the transmission data unit is the first transmission data unit and adding, to each of those ones of the transmission data units which are to be successively transmitted following the first transmission data unit, information representing that the transmission data unit is a succeeding transmission data unit, transmission data sum total calculation means for calculating the sum total of data in the data units divided by said division means, and transmission means for transmitting the transmission data units to which the information is added by said information addition means on the real time basis; and a reception apparatus including: reception means for receiving the data units transmitted on the real time basis from said transmission apparatus, receive data sum total calculation means for calculating the sum total of received data received by said reception and including data of the data unit to which the information representing that the data unit is the first data unit is added and data of the data units to each of which the information representing that the data unit is a succeeding data unit is added, and restoration means for positioning that one of the data units received by said reception means to which the information representing that the data unit is the first data unit as top data is added and positioning each of the data units received following the first data unit to which the information representing that the data unit is a succeeding data unit is added as succeeding data next to the last one of the data units which have been received till then.