Method, apparatus, and medium for recording information in data

Details Method, apparatus, and medium for recording information in data Method, apparatus, and medium for recording information in data

1992-07-09

1995-02-07

Pascal, Robert J.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692751, 369276, 369 48, 369 49, G11B 370

Patent

active

053880900

ABSTRACT:
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity from the innermost circumference to the outmost circumference. A disk-shaped recording medium is concentrically divided into a plurality of areas. Recording is performed with a recording density suited for the radial position of each of the areas. The width of the areas is set so that the recording capacity of a user data section sandwiched between servo sections forming a segment may increase with every transition to an outer adjacent area while taking one byte as a unit. The recording and reproducing apparatus has a clock generating circuit for servo data extraction and a clock generating circuit for user data extraction. The latter clock generating circuit is synchronized by a synchronizing pulse generated by the former clock generating circuit.

REFERENCES:
patent: 5056080 (1991-10-01), Russell
patent: 5172357 (1992-12-01), Taguchi

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