JPS63155470A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain matching property of a digital audio tape recorder (DAT) and outside, and to obtain a satisfactory data recorder which reduces the time for recording and the consumption of a recording medium, by setting a data quantity of an integer multiple of a fundamental unit, as a recording data, with respect to a data quantity of one frame of the DAT. CONSTITUTION:With respect to a data quantity of one frame of a DAT, a data quantity of an integer multiple of a fundamental unit is set as a recording data. At the time of reading out data written in a memory 24 through a bus 3, to the DAT 1 side, for instance, 11 pieces of units of 512 bytes are read out continuously, and also, thereafter,, a period of other data than a recording data of 128 bytes is provided. In such a way, matching property of the DAT 1 and the outside can be obtained satisfactorily. Such a read-control can be executed by controlling a DMA circuit 23 from a microcomputer 22. Also, at the time of reproduction, for instance, such as control as 128 bytes after 11 units are disregarded, etc. is executed in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data recorder for recording data in a combinator or the like using a rotary head type digital audio tape recorder (DAT).

[Summary of the invention]

The present invention relates to a data recorder, and is capable of good recording by utilizing a so-called DAT recording device and taking into consideration external compatibility.

[Conventional technology]

For example, in a converter, in order to protect the data written on the hard disk etc., this data is transferred to a so-called data streamer (recorder) once a day and recorded on another recording medium. .

In this case, so-called analog audio tape recorders have conventionally been often used as the above-mentioned data streamers. However, in this analog tape recorder, the amount of recording media consumed is extremely large, and since the data rate during recording is low, it takes an extremely long time to transfer and record. Furthermore, there are other problems, such as the inability to easily locate the beginning of a desired recorded portion.

By the way, a so-called DAT (digital audio tape recorder) has been developed ( r f! S R
ViewJ Published by Sony Corporation Shibaura Factory: l5SN
0389-7737: December 19B5 issue No. 11-1
(See page 7, etc.)

Since this DAT is originally designed to record and reproduce digital signals, it is suitable for recording the above-mentioned data. However, like this AT
A format including predetermined error correction, etc. has already been determined, and therefore, when recording the above-mentioned data, it is necessary to adjust the data format in advance.

[Problem to be Solved by the Invention 3] As mentioned above, in the conventional technology, there are problems such as the use of an analog recording data streamer, which increases the amount of recording media consumed and takes a long time to record. Ta.

[Means for solving problems]

The present invention has a rotating head, and two inclined tracks are formed by one rotation of the rotating head, and these two inclined tracks are regarded as one frame, so that a digital signal is completed within this one frame. When a device (DAT (1)) is provided that records and reproduces data encoded in Then, data (nα
) is recorded data, and the remaining data (β) is supplied to the above device as other data (Tmnα+β).

[Effect]

According to this, consistency between the DAT and the outside can be obtained by setting the amount of data that is an integral multiple of the basic unit as the recorded data for the data amount of one frame of the DAT.
The AT can be used as a data streamer, thereby providing a good data recorder that consumes less recording media and consumes less time for recording.

〔Example〕

In FIG. 1, (1) shows the configuration of DAT, and this
The A T (1) is provided with a rotating head drum (11), and the magnetic tape (12) is wound around the drum (11) within a range of about 90 degrees and is transported.

82 heads A are provided on this drum (11), and two inclined tracks are recorded and reproduced by one rotation of this drum (11).

On the other hand, external digital data is input to 10 circuits (13), and from these 10 circuits (13), it is supplied to a digital signal processing circuit (14) where it is converted into the above-mentioned DAT format. This formatted signal is sent to the recording amplifier (15) and the recording/playback switch (16).
The signal is supplied to the heads A and B through the recording side contacts of the recording side, and is recorded on the tape (12).

Also, the signal recorded on the tape (12) is head A.

When reproduced at B, this reproduction signal is supplied to the processing circuit (14) through the reproduction side contact of the recording/reproduction switch (16) and the reproduction amplifier (17), and the digital data extracted by inverse conversion is sent to the 10 circuits. (13) is output to the outside.

Furthermore, a control signal from the outside is supplied to the system control circuit (18), and this control circuit (
The signals from the control circuit (18) control the rotation of the head drum (11), the transfer of the tape (12), the switching of the switch (16), etc. During recording, the signals from the control circuit (18) 14) to form a subcode signal, which will be described later. Further, during reproduction, the signal extracted by the processing circuit (14) is supplied to the control circuit (18), where tracking and other controls are performed, and part of this signal is taken out to the outside.

DAT 11) is formed by the above configuration.

In this device, D is connected to the outside of the 10 circuits (13).
By providing an A-AD conversion circuit and providing a predetermined control device outside the control circuit (18), it is possible to record and reproduce audio (analog) signals, for example.

On the other hand, in the above-mentioned device, an arbitrary interface bus (3) is connected to the outside of the DAT (1) via the controller (2). Here, the interface bus (3) is, for example, the SCS I standard, (rNI
KKf! I l! LmICTRO? IC5J Published by Nihon Keizai Shimbun: October 6, 1986 Issue No. 102-10
(see page 7) can be used. Furthermore, this bus (
3) to the host computer (5) via the adapter (4).
), hard disk device (6), etc. are connected.

In the above controller (2), the bus (3)
A protocol control circuit (21) is provided between the controller (21) and a microcomputer (22) and a memory control (DMA) circuit (23) that control the operation of the controller (2) via the control circuit (21). Data and control signals are exchanged with the bus (3). Further, state detection and operation control are performed between the microcomputer (22) and the DMA circuit (23), and the buffer memory (24) is carried out through the DMA circuit (23).
) and the bus (3). Data is input and output between this memory (24) and the processing circuit (14) of DAT (1) via 10 circuits (25) (13). Further, control signals are exchanged between the micro combinator (22) and the system control circuit (1B>).

Therefore, in this device, data written to the hard disk device (6) is transferred to the controller (2) via the bus (3) in response to a transfer request from the controller (2) during recording.
2) and sent to the memory (23) via the DMA circuit (23).
24). Furthermore, the data written in this memory (24) is read out via 10 circuits (25).
A T (1) is input. And this D A T
+1), the data input to the 10th circuit (13) is regarded as the same as the data from the AD conversion circuit during audio recording, and the digital signal processing circuit (14) converts the data into a predetermined DAT.
The format is converted to the tape format (
12).

Also, when going back, head A starts from tape (12).

The signal reproduced at B is sent to the digital signal processing circuit (14)
The data is inversely transformed at , and data corresponding to the audio signal is extracted. Furthermore, this data is input to the controller (2) via the 10 circuit (13). In this controller (2), the memory (
24) is successively outputted via the DMA circuit (23), and then sent to the hard disk drive via the bus (3)! !
(6) is written.

Furthermore, in this device, the format of the DAT recorded on the tape (12) is as follows.

In Fig. 2, one frame is composed of two tracks Ta and Tb recorded by heads A and B, and each of these tracks is formed from the bottom of the figure, and the recorded signal has a total length of 5. From the bottom side against 90 degrees.
Predetermined margin part of 051 degrees - PLL preamble part of subcode of 0,918 degrees - First subcode part of 3,673 degrees - Postamble part of 0,459 degrees - 1,
Gap between blocks of 378 degrees - Tracking (ATF) signal section of 2,296 degrees 11. Gap between blocks of 378 degrees - PLL preamble section of data of 0,918 degrees - Data of 58,776 degrees Part - 1,378 degree inter-block gap part → 2.296 degree ATF signal part → 1.378 degree inter-block gap part - 0,918 degree subcode PLL preamble part → 3.673
The second sub-chord part of the degree → the postamble part of 0.459 degrees → the margin part of 5.051 degrees. It should be noted that the scale of the figure is not exact, and that in the device described above, 1
The data input from the 0 circuit (13) is sent to the processing circuit (14).
) are added with a predetermined error detection/correction code, etc., and are distributed and inserted into the data portions of tracks Ta and Tb in a predetermined interleaving relationship.

In this case, the original data amount of 5760 bytes can be recorded in the two data portions constituting one frame.

However, when this device is used as the above-mentioned data streamer, the unit of data from the outside is 2n, for example, 512 bytes. In this case, the recording capacity of 5760 bytes constituting one frame mentioned above is not an integral multiple of this unit, and therefore consistency with the outside cannot be obtained as is.

Therefore, in the above-mentioned device, when data written in the memory (24) is sent out to the DAT (1) side via the bus (3), for example, 11 units of 512 bytes are sent as shown in FIG. Continuous reading and then 1
A period is provided for data other than the 28-byte recording data.

This makes it possible to obtain good consistency between D AT (1) and the outside. The continuous control as described above is carried out from the microcomputer (22) to the DMA circuit (23).
This can be done by controlling the Further, during playback, control is similarly performed, such as ignoring the 128 bytes after the 11th unit.

Thus, according to the above-described device, the DAT can be used as a data streamer, and in this case, according to the above-described configuration, the rotary head drum (11) is rotated at, for example, 2000 rpm, so that the data: f3 green is rotated every second. 192.
This process can be performed at an extremely high speed of 1,000 bytes, and the amount of recording media consumed can be extremely small. Furthermore, in this case, according to the above configuration, D A
Since consistency between T (1) and the outside is obtained, good data recording and reproduction can be performed.

Note that in the above-described configuration, the remaining 128 bytes may be provided with an error correction code for data to be recorded.

In that case, if the proportion of correction codes etc. increases, 1
The area for codes and the like may be increased by reducing the number of units recorded in a frame.

〔Effect of the invention〕

According to this invention, consistency between the DAT and the outside can be obtained by setting the data amount that is an integer multiple of the basic unit as recording data with respect to the data amount of one frame of the DAT, and the DAT can be used as a data streamer. It can be used as
This has made it possible to obtain a good data recorder that consumes less recording media and requires less time for recording.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an example of the present invention, and FIGS. 2 and 3 are diagrams for explaining the same. (1) is DAT, (2) is controller, (3) is bus, (4) is adapter, (5) is host computer, (
6) is a hard disk device.

Claims (1)

[Claims] It has a rotating head, and one rotation of the rotating head produces two
A device is provided in which the slanted tracks of the book are formed and the two slanted tracks constitute one frame, and the digital signal is encoded and recorded and reproduced so as to be completed within this one frame. When the basic data amount of a digital signal is considered as a unit and data processing is performed for each unit, data that is an integer multiple of the above unit is considered as recording data for the total data amount that can be recorded and reproduced in one frame. A data recorder that supplies the remaining data to the above device as other data.