Title:
DISC RECORD REPRODUCER
Document Type and Number:
Japanese Patent JPS5952467
Kind Code:
A
Abstract:
PURPOSE:To attain quick search, by shifting a pickup by a distance based on a distance data between the radius of the present position and that of the objective position of the pickup, in the reproduction of the disc on which a digital data is recorded. CONSTITUTION:The radius of a disc 140 at the present position and the objective position is calculated from the absolute address of the positions of a pickup 142 and the distance to shift the pickup is determined by obtaining the difference of the both. Then, the number of pulses of the position detecting signal generating one pulse every time the pickup is shifted and a spot crosses one track is counted and when the shift distance of the pickup is equal to the said distance data, the shift of the pickup is stopped. In this case, the absolute address is converted into the radius data with a conversion table stored in an ROM. Then, the ROM is stored with the conversion table converting the absolute address into the radius data of the disc 140 at each prescribed unit time.
Inventors:
NABESHIMA DAIKI
NAKAMURA SHINICHI
KATAYAMA YOSHITAKA
NAKAMURA SHINICHI
KATAYAMA YOSHITAKA
Application Number:
JP16123782A
Publication Date:
March 27, 1984
Filing Date:
September 16, 1982
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
G11B27/10; G11B7/085; G11B20/10; G11B21/08; (IPC1-7): G11B5/09; G11B7/08; G11B21/08; G11B27/10
Attorney, Agent or Firm:
Takehiko Suzue
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