G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1, 352/19
G11B 20/18 (2006.01) G11B 20/10 (2006.01) G11B 27/10 (2006.01) G11B 27/11 (2006.01) G11B 27/28 (2006.01) G11B 27/30 (2006.01) G11B 27/34 (2006.01)
Patent
CA 1200600
A DIGITAL AUDIO DISC SYSTEM ABSTRACT OF THE DISCLOSURE A digital audio disc system having a main channel in which main data consisting of audio PCM signals and codes for error correction are recorded and a subchannel in which information digital signals other than said main data are recorded is disclosed. The code signals comprising a sync signal which has a prescribed bit pattern, a display position data, a command for a computer, and a display data relating a content of said audio PCM signals are also recorded multi-times on the disc together with said main data so as to enable the error check of said code signals. Both code signals and main data are reproduced and supplied to a display unit so as to indicate the correct display information data on a display screen under control of a microcomputer equipped in the playback side. When a pickup device moves on the disc in the radial direction at a speed higher than that in an ordinary playback operation, the display screen of said display unit is cleared or a previous normal display data is held. When the pickup device does not start the playback of said display data from the display start position, the display data thus reproduced is made invalid until the display data at the display start position is reproduced. In this way, it is possible to prevent that the abnormal display data is indicated.
419954
Furuya Tsuneo
Hori Katsuya
Gowling Lafleur Henderson Llp
Sony Corporation
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