TH20488EX - Methods for reducing access time - Google Patents

Abstract

Method for shortening the reach time to the target point of the turntable data track. When jumping over a track If the device's sweeping device is playing Fast moving over a large number of information tracks on a plate. Only the track can absolutely jump down the track. However, before the target point on the Great Target track will be Found by the beam of the sweeping device In the worst case Will have to wait equal to one round of the disc (CD) for the machine Playing a compact disc, the CLV system has an additional wait time of 120 ms to 330 ms in order to shorten the access time, corresponding disc rotational speed. Needed to make the target point (P2) be found on the go. To the target track (S2) is calculated from the A count of the tracks between the last data track (S2), the angular position of the last point (P1) swept over the last data track (S1). And the target point (P2) on the target track (S2), including the length of the crossing interval. Narrative device and / or Record with a turntable non-contact sweep, such as a compact disc player, video player, DRAW player, or optical-magnetic unit.

Claims (1)

1. A method for shortening the access time to the target point of the disc (CD) data track which is rotating in the recording and / or playback device, characterized by the A number of the addressed data track. Between the last data track (S1) that is scanned and the target track (S2) is calculated; The orthogonal position of the final point (P1) swept on the last track (S1) swept and the angular position of the target point (p2) on the target track (S2) are calculated. come; The T crossing time taken to reach the target point (P2) is calculated; And speed rpm: