FIELD: graphics transmission and storage. SUBSTANCE: transmission system has data transmission and reception devices, transmitting and receiving screens, adding facility coding and decoding facilities, and bit generator. Communication system has transmitting and receiving stations, communication line, sequential and selective coding and decoding facilities. Compressed data storage and extraction system has facilities for converting groups of data bits into desired number of coded data bits, adding facility, storage facility, and mentioned bits extraction facility. Superresonant circuit has data signal receiving facility and coded data bit generating facility. Decoding system has at least one superresonant circuit, output connecting device, adding facility , and feedback facility. Digital modulation method involves signal modulation, iterative signal addition, signal stream control, signal demodulation, and signal amplitude recording. EFFECT: reduced passband width and memory capacity. 39 cl, 21 dwg
