US 6,678,227 B1Granted

Simultaneous recording and reproduction apparatus and simultaneous multi-channel reproduction apparatus

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsSatoshi Kondo, Hideki Fukuda, Yoshinari Takemura, Masaaki Kondo, Yuji Takagi, Keiichi Kawashima

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Abstract

When recording and reproduction are performed at the same time, if a system controller detects that an amount of data accumulated in a buffer memory exceeds a predetermined value, the system controller it stops data reading from an optical disk 109 temporarily and records data accumulated in the buffer memory continuously to the optical disk. Then, an image is prevented from becoming abnormal when a reproduction position catches up to a recording position. Further, a system controller monitors a zone in an optical disk, to which recording is performed and controls a motor at an appropriate revolution number for the recording to the zone. Further, reproduction is performed by maintaining the revolution number. Then, even if the recording position and the reproduction position belong to different zones in a recording medium, a transition time from recording to reproduction is prevented from becoming long.

Claims20

Dependent claims

A simultaneous recording and reproduction apparatus comprising:

a first buffer memory operable to accumulate a first data stream;
a data input device operable to send the first data stream to said first buffer memory;
a data recorder operable to record the first data stream read from said first buffer memory to a recording medium by units, each of the units having a predetermined amount of data;
a data reproducer operable to reproduce the first data stream, which has been recorded previously to the recording medium, as a second data stream;
a second buffer memory operable to accumulate the second data stream read by said data reproducer;
a data output device operable to read the second data stream from said second buffer memory;
and
a system controller operable to monitor an amount of data accumulated in said first buffer memory,
wherein said system controller is also operable to control said data recorder and said data reproducer to perform recording and reproduction alternately in time, and when said system controller detects that an accumulated amount of data in said first buffer memory exceeds a first predetermined value, said system controller controls said data reproducer to stop reading the second data stream from the recording medium temporarily and controls said data recorder to write the first data stream continuously so as to write a plurality of units consecutively to the recording medium.

6 more elements

A simultaneous recording and reproduction apparatus comprising:

a first buffer memory operable to accumulate a first data stream;
a data input device operable to send the first data stream to said first buffer memory;
a data recorder operable to record the first data stream read from said first buffer memory to a recording medium;
a data reproducer operable to read the first data stream which has been recorded previously to the recording medium as a second data stream, said data reproducer being operable to read the first data stream under a high speed reproduction in a skip manner;
a second buffer memory operable to accumulate the second data stream read from said data reproducer;
a data output device operable to read the second data stream from said second buffer memory;
and
a system controller operable to monitor a recording position of the first data stream to the recording medium and a reproduction position of the second data stream from the recording medium,
wherein when said system controller detects, during the high speed reproduction, that the reproduction position catches up with the recording position, said system controller controls said data reproducer such that said data reproducer changes from high speed reproduction of the second data stream from the recording medium to one of normal reproduction, a stop state, and a temporal stop state of reproduction.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/413,326Filed 6 Oct 1999
Priority: JP 10-2836826 Oct 1998
Granted: 13 Jan 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G11B 20/10527
Digital recording or reproducing: audio or video recording; Data buffering arrangements
G11B 20/1258
On discs: where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
G11B 2020/10537
Audio or video recording; Data buffering arrangements: audio or video recording
G11B 2020/10685
Aspects of buffer control: input interface, i.e. the way data enter the buffer, e.g. by informing the sender that the buffer is busy