Method and apparatus for synchronizing the readout of a sequenti

Details Method and apparatus for synchronizing the readout of a sequenti Method and apparatus for synchronizing the readout of a sequenti

1991-09-16

1994-03-01

Psitos, Aristotelis

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 60, 369 48, 395250, G11B 2010

Patent

active

052914682

ABSTRACT:
A method and apparatus for controlling the readout rate of information from a sequential storage medium, such as a CD-ROM, to maintain synchronism between the device containing the medium and an independent receiver receiving the information. Information is loaded from the media into a buffer at a rate controlled by pulses from a device clock. Information is unloaded from the buffer for utilization by the receiver independently of the loading of the buffer. The amount of free space available in the buffer is measured as information is loaded into the buffer. The rate of the clock is dynamically adjusted in response to the amount of free buffer space to maintain the full state of the buffer within predetermined limits. In this manner, the buffer never empties or fills in response to the unloading by the independent receiver.

REFERENCES:
patent: 4413289 (1983-11-01), Weaver et al.
patent: 4536864 (1985-08-01), Van Rosmalen
patent: 4791622 (1988-12-01), Clay et al.
patent: 4802152 (1989-01-01), Markvoort et al.
patent: 4841513 (1989-06-01), Farhangi et al.
patent: 4872073 (1989-10-01), Fincher et al.
patent: 5103467 (1992-04-01), Bedleck et al.

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