US 5,491,677 AGranted

Recording and/or reproducing apparatus and method of controlling same

AssigneeSony Corporation

InventorYoshio Sasaki

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Abstract

A recording and/or reproducing apparatus for recording data on and/or reproducing data from a recording medium includes a recording and/or reproducing unit, a memory, a memory controller, and a servo, control circuit, and a system controller. The memory temporarily stores data outputted from the recording and/or reproducing unit or input data to be recorded on the recording medium by the recording and/or reproducing unit. The memory controller controls the memory to write and read data such that data are read from the memory in a unit of time at a transfer rate lower than the transfer rate at which data are written in the memory in a unit of time. The servo control circuit supplies a servo control signal to the recording and/or reproducing means, and has an adjustable servo control gain. The system controller controls operation of the recording and/or reproducing unit, the memory controller, and the servo control circuit. The input data are recorded on the recording medium through the memory and the data reproduced from the recording medium are outputted through the memory. The system controller temporarily interrupts the recording of data on the recording medium or the reproducing of data from the recording medium with the recording and/or reproducing unit based on the amount of data stored in the memory, and controls the servo control circuit and the recording and/or reproducing unit to automatically adjust the servo control gain while the recording or reproducing of data is temporarily interrupted.

Claims14

Dependent claims

A recording and/or reproducing apparatus for recording data on and/or reproducing data from a recording medium, said apparatus comprising:

recording and/or reproducing means movable relatively to the recording medium, for recording data on the recording medium and/or reproducing recorded data from the recording medium;
a memory for temporarily storing data outputted from said recording and/or reproducing means or input data to be recorded on the recording medium;
memory control means for controlling said memory to write and read data such that the data outputted from said recording and/or reproducing means are written in said memory or the input data to be recorded on the recording medium which are temporarily stored in said memory are read from said memory at a transfer rate higher than the transfer rate at which the data outputted from said recording and/or reproducing means which are temporarily stored in said memory are read from said memory or the input data to be recorded on the recording medium are written in said memory;
servo control means for generating a servo control signal based on an error signal generated based on the data outputted from said recording and/or reproducing means, and supplying the generated servo control signal to said recording and/or reproducing means, said servo control means having an adjustable servo control gain;
and
system control means for controlling operation of said recording and/or reproducing means, said memory control means, and said servo control means, said system control means comprising means for controlling said recording and/or reproducing means to intermittently record data on the recording medium or reproduce recorded data from the recording medium based on the amount of data stored in said memory, and means for controlling said servo control means to automatically adjust the servo control gain thereof while the operation of said recording and/or reproducing means to record or reproduce data is being interrupted.

3 more elements

A method of controlling a recording and/or reproducing apparatus having a memory for temporarily storing data outputted from recording and/or reproducing means or input data to be recorded on a recording medium, and servo control means for generating a servo control signal based on an error signal generated based on the data outputted from the recording and/or reproducing means, and supplying-the generated servo control signal to the recording and/or reproducing means, the servo control means having an adjustable servo control gain, the arrangement being such that the memory is controlled to write and read data such that the data outputted from said recording and/or reproducing means are written in said memory or the input data to be recorded on the recording medium which are temporarily stored in said memory are read from said memory at a transfer rate higher than the transfer rate at which the data outputted from said recording and/or reproducing means which are temporarily stored in said memory are read from said memory or the input data to be recorded on the recording medium are written in said memory, said method comprising the steps of:

controlling said recording and/or reproducing means to intermittently record data on the recording medium or reproduce recorded data from the recording medium based on the amount of data stored in said memory;
and
controlling said servo control means to automatically adjust the servo control gain thereof while the operation of said recording and/or reproducing means to record or reproduce data is being interrupted.

Dependencies are inferred from the claim text.

Facts

Application: 08/223,554Filed 6 Apr 1994
Priority: JP 5-10726612 Apr 1993
Granted: 13 Feb 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G11B 7/0941
With provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record…
G11B 7/0946
With provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record…
G11B 7/0948
With provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record…
G11B
Information storage based on relative movement between record carrier and transducer