PORTABLE DATA PROCESSING AND STORAGE SYSTEM

摘要

A credit card size portable system comprises (a) a memory (22) for storage serially of digital data, especially of sound analogue signal which has been digitally encoded, (b) decoder means (26) for converting the memory output into analogue form, preferably several decoders each for one sound band, (c) a control register (34) for controlling input and output of data from the memory (22) and which is responsive to control data present in the input and ouput stream, and input (14) and output (15) for data entering and leaving the card system. Memory (a) can be of magnetic bubbles, of 8 megabyte size, which records 3 1/2 minutes of music. A card is readily programmed with the digital data and can be stored or transported for replay of sound signal as desired, in place of conventional discs or cassettes. The control data bits are detected by the control register and serve to control the recording and reply steps. The digital data may be replayed directly from the memory without passing through the decoders, for input into another memory upon command from the control register. A replay unit includes a controller and decoders, for producing analogue data for sound reproduction.