Patent ID: 6643341
Filing Date: 2003-11-04
Classification: G11B,H04K,H04L

Abstract:
A method of data signal transmission using multisignals in which: a plurality of sensing levels are prepared so as to sense and discriminate signals which are different in height, width, duty, frequency, and waveform; from all the signals recognizable by the above-mentioned levels, the necessary number of the signals are chosen at random for use as multisignals; a block of encoded signals composed of such multisignals and a block of information signals are compressed together in time direction to form multisignal code and sent out repeatedly; on the receiver's side, after the time-direction compressed wave is received and restored, the block of multisignal code is sensed and recorded with a plurality of the above-mentioned levels; when the next block of multisignal code comes, it is compared with the recorded one; only when the both blocks are recognized to be the same, the accompanying information signals are taken out; and simultaneously signals of acknowledgement are sent to the sender's side, the sender's side inserts, before compression, said block of encoded signals and said block of information signals between encoded start signals and encoded end signals; these signals are put together as a set, and such a set is compressed and sent out repeatedly one after another at irregular intervals; the transmission is continued until the sender receives a multisignal code from the receiver's side which tells that the receiver has received the sets of signals; the receiver, receiving the encoded start signals, recognizes and verifies the multisignal code block in every set of the multisignal code block and information block and the encoded end signals; the receiver sends to the sender a multisignal code to acknowledge his or her reception of the transmission, and keeps on sending the code repeatedly at irregular intervals until the transmission stops; and the information signals are taken out a single time.