| 摘要 |
<p>PURPOSE:To demodulate a compressed data modulated code repetitively at a high speed with highly accurate digital calculation by decoding each data component of the modulated code by a decoder, adding some of demodulated codes by obtained components selectively to obtain a demodulated code corresponding to the modulated code. CONSTITUTION:A modulated code using initial values Yo, Uo, Vo in 8-bit (Y is a luminance signal, U, V are color difference signals) as one set as a picture data corresponding to the leftmost picture element on the picture is read from a CD-ROM, an initial value Yo is inputted to a B input terminal of an adder 15 via a switch 10. Moreover, the initial value Vo is demodulated into a component demodulated code 1.371X(Vo-128) by a decoder 6 and it is given to a B input terminal of an adder 19 via a switch 14. Furthermore, an output '0' of a latch circuit 22 is inputted to an A input terminal of the adder 15. Thus, a latch circuit 22 holds an input data, that is, the demodulated data Ro and it is outputted as a primary color signal R.</p> |
