JPH0856325A - Data transmission controller - Google Patents

Abstract

PURPOSE:To obtain a data transmission controller which properly performs data transmission between a data reproducing device and a data recording device for disk media. CONSTITUTION:An audio and video data reproducing device 7 reads data out of a magnetooptic disk 1 by optical heads 2A and 2B and records them in buffers 5A and 5B, and the data are outputted to an audio and video data recording device 17 through a signal processing circuit. The audio and video data recording device 17 records the input data in buffers 15A and 15B through a signal processing circuit 13 and writes them on a magnetooptic disk 11. Under the control of an SMS 8, the data are recorded so that the buffers 5A and 5B become nearly full, and the buffers 15A and 15B are nearly empty.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission control device capable of appropriately performing reading and writing processing of a disk medium.

[0002]

2. Description of the Related Art In an AV apparatus for processing data such as video and audio, the amount of data is enormous, so that a relatively inexpensive magnetic disk, magneto-optical disk, optical disk or the like is used as an apparatus for storing data. The data recording / reproducing apparatus used is used. These data recording / reproducing devices have a plurality of heads for writing / reading data, and these heads are used for real-time overwriting and recording / reproducing of a plurality of independent materials. When a material is copied using such a data recording / reproducing apparatus, the material is reproduced by the data reproducing apparatus (data sending side), and the reproduced data is accumulated in the buffer. After that, the reproduction data accumulated in the buffer of the data reproducing device is transmitted to the data recording device (data receiving side), accumulated in the buffer built in the data recording device, and then recorded on the disc.

[0003]

However, as described above, when the material is duplicated by using the data recording / reproducing apparatus, in the recording process of the data recording apparatus, for example, the area where the data is already recorded is the disk. If it exists, the seek area may be searched for the next recording area. While the seek operation is being performed, the data writing process is not performed by the data recording device. Therefore, the buffer of the data recording device is full (Ful) depending on the data transmitted from the data reproducing device.
In the case of l), there arises a problem that the transmitted data cannot be properly recorded in the buffer.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a data transmission control device capable of appropriately performing data transmission between a data reproducing device and a data recording device. .

[0005]

In order to solve the above-mentioned problems of the prior art and achieve the above-mentioned object, the data transmission control device of the present invention reproduces a video signal recorded on a first disk medium. Reproduction processing means for recording the reproduced data, first recording means for temporarily recording the reproduced data, data transmitted from the first recording means, and temporarily recording the input data. 2 recording means, and the second
Recording processing means for recording the data recorded in the recording means on the second disk medium, and the area in which the data is recorded in the second recording means is less than or equal to a predetermined ratio with respect to the entire recordable area. Thus, the control means controls the data transmission from the first recording means to the second recording means.

Further, the control means of the data transmission control device of the present invention is preferably such that the area where the data is recorded in the first recording means is a predetermined ratio or more with respect to the entire recordable area. The recording state of the first recording means is controlled.

Further, in the data transmission control device of the present invention, preferably, the reproduction processing means has a plurality of heads for reading a video signal recorded on the first disk medium, and the first recording The means comprises a plurality of recording means corresponding to each head of the reproducing means, the recording processing means has a plurality of heads for writing on the second disk medium, and the second recording means. Is composed of a plurality of recording means corresponding to each head of the recording means.

Further, the data transmission control device of the present invention is
Preferably, the control means controls the recording state of the first recording means such that the area in which the data is recorded in the first recording means is about 100% of the entire recordable area. At the same time, the data is recorded from the first recording means to the second recording means such that the area in which the data is recorded in the second recording means has a ratio of about 0% with respect to the entire recordable area. Control data transmission.

[0009]

In the data transmission control device of the present invention, the reproduction processing means reproduces the video signal recorded on the first disk medium, and the reproduction data is temporarily recorded in the first recording means. At this time, for example, the control unit controls the recording state of the first recording unit so that the area in which the data is recorded has a predetermined ratio or more with respect to the entire recordable area. Therefore, in the first recording means, the second
A certain amount of data to be output to the recording means is always recorded. Then, the data is transmitted from the first recording means to the second recording means, and the transmitted data is recorded in the second recording means. At this time, the control unit transfers the data from the first recording unit to the second recording unit so that the area in which the data is recorded in the second recording unit is less than or equal to a predetermined ratio with respect to the entire recordable area. Data transmission is controlled. Therefore, it is possible to prevent the data from the first recording device from being transmitted in the state where the second recording device has no recordable area. Then, the data recorded in the second recording means is recorded in the second disk medium by the recording processing means.

[0010]

1 is a block diagram showing an embodiment of an audio / image data recording / reproducing apparatus according to an embodiment of the present invention.
In FIG. 1, 7 is a voice / image data reproducing device, 17 is a voice / image data recording device, and 8 is an SMS (Server Manag).
ement System), 9 is a transmission path. First, the audio / image data reproducing device 7 will be described. As shown in FIG. 1, the audio / image data reproducing device 7 includes an optical head 2A,
2B, signal processing circuit 3, switching circuit 4, buffers 5A, 5
B, the drive circuit 6A, 6B, the magneto-optical disk 1
Play.

The magneto-optical disk 1, as shown in FIG.
A plurality of tracks TR1, TR2 in which data is written
TR3, ... Are formed in a spiral shape. And
Sectors S1, S2, ..., S84, ..., S126, ... Which are data writing units of a predetermined length are continuously provided from the inner circumference side of the disk. In the example of FIG. 2, each track T
42 sectors are provided for each R.

FIG. 3 is an explanatory diagram of a method of allocating the physical address PA and the logical address LA. In FIG. 3, one square in the figure indicates one sector, the upper number in each square indicates the physical address PA, and the lower number indicates the logical address LA. As shown in FIG. 3, the physical address PA is continuously assigned in sector units from the inner circumference side of the disc. Then, the logical address LA that can be used by the user is continuously assigned from the inner circumference side of the disk in sector units at the time of disk formatting. If there is a defective sector DS at the time of formatting, it is skipped and the logical address is given to the next sector S. Address is assigned. For example, as shown in FIG. 3, the physical address PA is "4.
When the sector "7" is a defective sector, the logical address "47" is assigned to the sector whose physical address PA is "48".

The optical heads 2A and 2B can be independently moved (seek) in the radial direction of the magneto-optical disk 1 under the control of a servo system circuit (not shown), and are driven by separate drive circuits 6A and 6B. The data is read from the sector of the addressed track of the disk 1.

Further, at the time of reading, the signal processing circuit 3 similarly allocates the block data allocated to the optical heads 2A and 2B at the time of writing as the read data of the optical heads 2A and 2B, and at each block allocated at this time. By sequentially accessing each corresponding optical head,
The read data via the drive circuits 6A and 6B and the buffers 5A and 5B is sequentially input by switching the switching circuit 4 at a predetermined timing, and the input read block data is combined in time order to change from the disk recording format to the external interface format. Convert. Then, the converted data is output as an output signal (readout data) RD to the audio / image data recording device 17 via the transmission path 9. A data transmission method performed via the transmission path 9 is, for example, SMPTE (Society of Motion and Tele).
Vision Engineering's SMPTE-295M standardized SDI method is adopted.

Next, the audio / image data recording device 17 will be described. As shown in FIG. 1, the audio / image data recording device 17 includes optical heads 12A and 12B, a signal processing circuit 13, a switching circuit 14, buffers 15A and 15B, and drive circuits 16A and 16B. The output signal RD from the device 7 is input as write data WD and recorded on the magneto-optical disk 11.

The optical heads 12A and 12B can be independently moved (seek) in the radial direction of the magneto-optical disk 1 under the control of a servo system circuit (not shown), and are driven by separate drive circuits 16A and 16B. Data is written to the sector of the addressed track of the disk 1.

The signal processing circuit 13 inputs the output signal RD, which is a temporally compressed high-speed video / audio signal, as write data WD and sets the format of the input signal from the external interface to the magneto-optical disk 11. 4, and the converted data is divided into blocks for every sector to be skipped when the optical heads 12A and 12B jump one track, that is, blocks BL for every 43 sectors, as shown in FIG. The switching circuit 14 switches so that the data to be recorded by the optical head 12A and the data to be recorded by the optical head 12B are alternately distributed, and the distributed 43 sectors of data are sent to the corresponding optical heads 12A and 12B. Take control.

Next, the SMS 8 will be described. SMS
8 is a control signal CTLa to the audio / image data reproducing device 7.
To control the recording states of the buffers 5A and 5B, and to send a control signal CTL to the audio / image data recording device 17.
b is output to control the recording states of the buffers 15A and 15B.

First, the buffers 5A and 5B by the SMS8
The control of the recording state will be described. Figure 5 shows the SMS8
9 is a flowchart of processing in the audio / image data reproducing device 7. Step S1: The SMS 8 determines whether or not the data recording state in the buffers 5A and 5B is “near Full”. At this time, when data is recorded in, for example, 90% or more of the entire recording area in the buffers 5A and 5B, it is determined to be "near Full".
The determination of "near Full" is not limited to the above 90%.

Step S2: In step S1, "n
It is executed when it is determined that it is not “ear full”. The SMS 8 outputs a control signal CTLa for instructing the audio / image data reproducing device 7 to start or continue the reading operation of the magneto-optical disk 1 by the optical heads 2A, 2B and the drive circuits 6A, 6B. The optical heads 2A and 2B and the drive circuits 6A and 6B start or continue the reading operation of the magneto-optical disk 1 based on the control signal CTLa.

Step S3: In step S1, "n
It is executed when it is determined to be "ear Full". The SMS 8 outputs a control signal CTLa for instructing the audio / image data reproducing device 7 to stop the reading operation of the magneto-optical disk 1 by the optical heads 2A, 2B and the drive circuits 6A, 6B. Optical head 2
A, 2B and drive circuits 6A, 6B are controlled by this control signal C
The reading operation of the magneto-optical disk 1 is stopped based on TLa.

By performing the processes of steps S1 to S3 shown in FIG. 5, the read data of the magneto-optical disk 1 is always "near Full" in the buffers 5A and 5B.
It is recorded in the state of "l". In this way, the buffer 5A,
By always keeping 5B in the “near Full” state, the read data to be output to the audio / image data recording device 17 is always output to the buffers 5A and 5B when the audio / image data recording device 17 receives a data input instruction. Can be kept at. As a result, the data writing process in the audio / image data recording device 17 can be efficiently performed.

Next, the buffers 15A, 1 by the SMS8
The control of the recording state of 5B will be described. Figure 6 shows SM
7 is a flowchart of processing in S8 and the audio / image data recording device 17. Step S4: The SMS 8 determines whether or not the data recording state in the buffers 15A and 15B is “near Empty”. At this time, the buffers 15A, 15
When data is recorded in the area B of, for example, 10% or less of the entire recording area, it is determined to be “near Empty”. The determination of "near Empty" is not limited to the above 10%.

Step S5: In step S4, "n
It is executed when it is determined to be "ear empty". The SMS 8 instructs the audio / image data recording device 17 to start or continue data input from the audio / image data reproducing device 7.
Output b. The audio / image data reproducing device 7 starts or continues data input from the audio / image data reproducing device 7 based on the control signal CTLb.

Step S6: In step S1, "n
It is executed when it is determined that it is not "ear empty". The SMS 8 outputs a control signal CTLb for instructing the audio / image data recording device 17 to stop the data input from the audio / image data reproducing device 7. The audio / image data recording device 17 uses the control signal C
Data input from the audio / image data reproducing device 7 is stopped based on TLb.

By performing the processes of steps S4 to S6 shown in FIG. 6, the buffers 15A and 15B always have
The input data from the audio / image data reproducing device 7 is "ne
It is recorded in the state of “arEmpty”. In this way, the recording states of the buffers 15A and 15B are changed to "near Empty".
By holding the data “y”, the data from the audio / image data reproducing device 7 is transmitted and the data from the audio / image data reproducing device 7 is buffered even though there is no recordable area in the buffers 15A and 15B. It is possible to avoid a situation where the data is not properly recorded in 15A and 15B.

That is, for example, the optical head 12A,
12B and the drive circuits 16A and 16B perform a seek operation or the like, and when data writing processing is not performed, only data input is performed and data from the audio / image data reproducing device 7 is recorded in the buffers 15A and 15B. It is possible to prevent the input from exceeding the limit, and the data from the audio / image data reproducing device 7 can be appropriately recorded in the buffers 15A and 15B.

The invention is not limited to the embodiments described above. For example, in the above-described embodiment, the case where two optical heads are used in both the audio / image data reproducing device 7 and the audio / image data recording device 17 has been described, but the audio / image data reproducing device 7 and the audio / image data are used. The number of optical heads used in the recording device 17 is one.
It may be one or three or more. Also. The processes in the audio / image data reproducing device 7 and the audio / image data recording device 17 based on the control signal from the SMS 8 are not limited to the processes shown in FIGS. 5 and 6 described above.

Further, in the above-mentioned embodiment, the magneto-optical disk is exemplified as the disk medium, but other disk medium may be used. Further, in the above-described embodiment, the case where reproduction and recording are performed between the magneto-optical disk 1 and the magneto-optical disk 11 is illustrated, but a magnetic tape and a disk medium, a disk medium and a magnetic tape, or a magnetic tape and Even when reproducing and recording between magnetic tapes, the above-mentioned buffers 5A, 5B, 15A,
The control method of 15B can be applied.

[0030]

According to the data transmission control device of the present invention,
The first recording means always records a certain amount or more of data to be output to the second recording means. Therefore, it is possible to always transmit the data necessary for the recording processing means,
The efficiency of the processing in the recording processing means can be improved, and the performance of the recording processing means can be effectively exhibited. Further, according to the data transmission control device of the present invention, it is possible to prevent the data from the first recording device from being transmitted in the state where the second recording device has no recordable area.
Therefore, the data transmitted from the first recording unit is
It is possible to avoid a situation in which the recording means is not properly recorded.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining a format of a magneto-optical disk according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a method of assigning a physical address and a logical address.

FIG. 4 is a diagram for explaining a data distribution method of the signal processing circuit shown in FIG.

FIG. 5 is a flowchart of processing in the SMS and the audio / image data reproducing device.

FIG. 6 is a flowchart of processing in the SMS and the voice / image data recording device.

[Explanation of symbols]

 1, 11 ... Magneto-optical disk 2A, 2B, 12A, 12B ... Optical head 3, 13 ... Signal processing circuit 4, 14 ... Switching circuit 5A, 5B, 15A, 15B ... Buffer 6A , 6B, 16A, 16B ... Driving circuit 7 ... Audio / image data reproducing device 8 ... SMS 17 ... Audio / image data recording device

Claims (4)

[Claims] 1. A reproduction processing means for reproducing a video signal recorded on a first disk medium, a first recording means for temporarily recording the reproduced data, and a transmission from the first recording means. Second recording means for inputting the input data and temporarily recording the input data; recording processing means for recording the data recorded in the second recording means on a second disk medium; Control for controlling data transmission from the first recording means to the second recording means such that the area where the data is recorded in the second recording means is equal to or less than a predetermined ratio with respect to the entire recordable area. And a data transmission controller having means. 2. The control means sets the recording state of the first recording means so that the area in which the data is recorded in the first recording means becomes a predetermined ratio or more with respect to the entire recordable area. The data transmission control device according to claim 1, which controls. 3. The reproduction processing means has a plurality of heads for reading out a video signal recorded on the first disk medium, and the first recording means corresponds to each of the heads of the reproduction means. A plurality of recording means, the recording processing means has a plurality of heads for writing on the second disk medium, and the second recording means corresponds to each of the heads of the recording means. 3. The data transmission control device according to claim 1, comprising a plurality of recording means. 4. The recording state of the first recording means, so that the area in which the data is recorded in the first recording means has a ratio of about 100% with respect to the entire recordable area. The first recording means to the second recording means so that the area in which the data is recorded in the second recording means is about 0% with respect to the entire recordable area. The data transmission control device according to any one of claims 1 to 3, which controls data transmission to and from.