RECONSTITUTION OF THE AUDIO SIGNAL

The signal read from the disc by the optical pick-up has to be reconstituted to form the analog audio signal. Fig. 14.6 shows the block diagram of the signal processing in the player.

 

images

 

Fig. 14.5 A magnified view of the light spot S and its immediate surroundings, with a plan view. It can clearly be seen that the diameter of the spot (about 1 μm) is larger than that of the width of the pit (0.6 μm).

 

In Demod the demodulation follows the same rules that were applied to the EFM modulation, but now in the opposite sense. The information is then temporarily stored in a buffer memory and then reaches the Error-Detection ...

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