JPH06111477A - Recording / playback device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a recording / reproducing apparatus equipped with a memory for enabling processing such as data compression and decompression, when a recording stop request is made, recording should remain in the memory. It is to prevent the data leaked to the recording medium. A recording / reproducing apparatus includes a memory for temporarily storing data, a recording signal processing circuit for reading data from the memory and converting it into a recording signal, and a memory for remaining in the memory when a recording stop request is issued. Control means for stopping the signal recording on the recording medium only after all the data to be recorded on the recording medium is recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and more particularly to temporarily storing data for recording or reproducing the data on a recording medium in order to perform processing such as compression or expansion of the data. The present invention relates to a recording / reproducing device provided with a memory.

[0002]

2. Description of the Related Art In a recording / reproducing apparatus which does not have a memory for temporarily storing the data in order to perform processing such as compression and expansion of the data at the time of recording / reproducing,
Real-time control of recording and reproduction so that when a recording stop request occurs, recording of data on the recording medium is stopped immediately, and when reproduction stop request occurs, the reproduction of data from the recording medium is stopped immediately. I wish I had done.

[0003]

However, in a recording / reproducing apparatus equipped with a memory for enabling processing such as data compression and decompression during recording / reproduction, if control is performed in real time, in the case of reproduction. Means that even if the writing of the data reproduced from the recording medium to the memory and the reading from the memory are stopped at the same time when the reproduction stop request occurs, the data remaining in the memory need not be reproduced. Therefore, in the case of recording, if the reading of data from the memory and the recording of the data on the recording medium are stopped at the same time when the recording stop request occurs, the data that should have been recorded is stored in the memory. It will be left inside.

In view of the problems in the prior art as described above, an object of the present invention is to provide a recording / reproducing apparatus provided with a memory for enabling processing such as data compression and decompression when a recording stop request occurs. Another object of the present invention is to provide a recording / reproducing apparatus that does not cause recording omission of data that should have been recorded in the memory.

[0005]

A recording / reproducing apparatus according to the present invention has a memory for temporarily storing data to be recorded on a recording medium, and a sequential reading of the data temporarily stored in the memory. When a recording signal processing circuit for converting the recording signal to the recording medium and a recording stop request for stopping the signal recording to the recording medium occur, the signal is temporarily stored in the memory at that time. And a control means for controlling so as to stop the signal recording on the recording medium only after the recording signal processing circuit reads all the stored data and completes the signal recording on the recording medium.

[0006]

In the recording / reproducing apparatus of the present invention, when the recording stop request is issued, the recording signal processing circuit reads out all the data temporarily stored in the memory at that time and outputs the signal to the recording medium. Since the control means controls the entire system so that the signal recording on the recording medium is stopped only after the recording is completed, the data which should be input and recorded immediately before the recording stop request is recorded on the recording medium. The problem of being left in the memory without being deleted can be solved.

[0007]

1 is a block diagram schematically showing a recording / reproducing apparatus according to an embodiment of the present invention. This recording / reproducing apparatus includes a recording / reproducing mechanism 1 including a recording medium, a recording signal processing circuit 2, a control microcomputer 3, and a memory 4.
And a signal processing circuit 5 for reproduction.

The data (A) to be recorded is input to the recording signal processing circuit 2. The recording signal processing circuit 2 is
Input data (A) is once written in the memory 4 in order to perform processing such as data compression and expansion. Then, the recording signal processing circuit 2 sequentially reads the data from the memory 4, performs a predetermined process, and outputs it as recording data (B).

On the other hand, the reproduction data is reproduced signal processing circuit 5
Is input to the memory 4 and the reproduction signal processing circuit 5 temporarily reproduces the reproduction data in order to perform processing such as data compression and expansion.
Write in Then, the reproduction signal processing circuit 5 sequentially reads the data from the memory 4, performs a predetermined process, and outputs the reproduction output data.

The control microcomputer 3 is provided to control the operation timing of the entire system of the recording / reproducing apparatus.

FIG. 2 illustrates the timing relationship during recording in the recording / reproducing apparatus of FIG. 1, and specifically shows the time relationship between the input data (A) and the recording data (B). In FIG. 2, since the data input (A) input to the recording signal processing circuit 2 at time a1 is temporarily stored in the memory 4 and then signal processed, the recording data (B)
As a result, the time actually recorded on the recording medium is time a2 delayed by t.

The flowchart of FIG. 3 shows an example of an operation procedure at the time of recording in the recording / reproducing apparatus of FIG. According to this flowchart, in step n1, data is input to the recording signal processing circuit 2, and the data input (A) is temporarily stored in the memory 4 and then processed by the recording signal processing circuit 2. In step n2, the recording data (B) that has been subjected to signal processing by the recording signal processing circuit 2 and output is recorded in the recording medium. These steps n1 and n2 are repeated until the recording stop request is detected in step n3. Step n3
When a recording stop request is detected at step n4,
Then, the data input to the recording signal processing circuit 2 is stopped. At this time, if a recording stop request is generated at time b1 in the timing chart of FIG. 2, it is necessary to actually stop recording on the recording medium not at time b1 but at time b2. Here, time b2-time b1
Time (b2-b1) corresponding to (hatched in the figure)
Corresponds to the delay time (a2-a1) between time a2 and time a1.

That is, if the actual recording on the recording medium is also stopped at the time b1, the time (b2-b1) corresponding to the time b2-time b1 immediately before the time b1.
The data to be recorded which has already been stored in the memory 4 is not recorded on the recording medium,
Will be left inside.

Therefore, when the recording stop request is detected in step n3, the process proceeds to step n4 to stop the data input to the recording signal processing circuit 2, but the microcomputer 3 in step n5 sends the data to the recording medium. Continue recording. The data recording in step n5 is repeated as long as the data remains in the memory 4.

After that, when it is confirmed by the microcomputer 3 that no data remains in the memory 4 in step n6, the process proceeds to step n7 to stop the actual recording on the recording medium. As a result, even if a recording stop request is generated, the actual recording on the recording medium is not stopped while the data that should have been recorded remains in the memory 4, and recording is performed before the recording stop request is generated. All the data already input to the signal processing circuit can be recorded on the recording medium.

On the other hand, in the case of the reproduction operation, since the reproduction stop request is given based on the reproduction data finally output from the reproduction signal processing circuit 5, the reproduction is performed before the data to be reproduced is obtained. It does not cause problems such as being stopped. That is, it will be understood that even in the recording / reproducing apparatus provided with the memory 4 as shown in FIG. 1, control can be performed by the microcomputer 3 based on real time during reproduction.

[0017]

As described above, according to the present invention, when a recording stop request is issued despite having a memory for enabling processing such as data compression and expansion, It is possible to provide a recording / reproducing apparatus that does not cause the recording omission of the data that should have been recorded.

[Brief description of drawings]

FIG. 1 is a block diagram showing a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a timing chart showing a timing relationship during data recording in the recording / reproducing apparatus of FIG.

3 is a flowchart showing a data recording procedure in the recording / reproducing apparatus of FIG.

[Explanation of symbols]

 1 recording / reproducing mechanism including recording medium 2 recording signal processing circuit 3 control microcomputer 4 memory 5 reproducing signal processing circuit

Claims (2)

[Claims] 1. A memory for temporarily storing data to be recorded on a recording medium; and a memory for sequentially reading out the data temporarily stored in the memory and converting the data into a recording signal for the recording medium. A recording signal processing circuit, and when a recording stop request for stopping signal recording to the recording medium is generated, all of the data temporarily stored in the memory at that time is recorded as the recording signal. A recording / reproducing apparatus comprising: control means for controlling so as to stop the signal recording on the recording medium only after the processing circuit reads out and completes the signal recording on the recording medium. 2. The memory also temporarily stores a reproduction signal reproduced from the recording medium, sequentially reads the reproduction signal temporarily stored in the memory and converts the reproduction signal into reproduction data. The control means further includes a processing circuit, which performs signal reproduction from the recording medium and reading of a reproduction signal from the memory and conversion into reproduction data by the reproduction signal processing circuit when a reproduction stop request is generated. The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus is stopped at the same time.