Optical disc audio reproduction device having track playback mon

Details Optical disc audio reproduction device having track playback mon Optical disc audio reproduction device having track playback mon

1993-02-12

1993-09-28

Pascal, Robert J.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 85, 369 30, 360 15, G11B 1722, G11B 364

Patent

active

052491668

ABSTRACT:
Apparatus and method for monitoring audio track playbacks by an optical disc audio reproduction device. A track number corresponding to an audio track encoded on an optical disc is selected to initiate playback of the selected audio track and a corresponding track number is stored in a first memory device. A series of data frames, each having an audio data block and a non-audio subcode block containing a single Q data bit, which define the selected audio track are then read from the optical disc. The data frames are transmitted to a demodulator circuit where the non-audio subcode block is separated from the audio data block. The non-audio subcode block is then transmitted to a microprocessor where the single bit of Q data subcode from each frame is assembled into a Q data subcode block. A portion of the Q data subcode block which contains a UPC code identifying the optical disc is transmitted to a second memory device. The contents of the first and second memory device are then combined in a third memory device to provide a record of audio track playbacks performed by the optical disc audio reproduction device.

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