JPH05314672A - Recording / playback device - Google Patents

Abstract

(57) [Abstract] [Purpose] After converting a digital signal input from the outside into an internal format by a predetermined converting means, the digital signal is recorded and reproduced on a predetermined recording medium and at the same time recorded on the recording medium. In a recording / reproducing apparatus for inspecting a recording and reproducing state with respect to a recording medium by comparing a digital signal to be recorded and a digital signal reproduced from a recording medium with an inspecting means, an error of a converting means is inspected by a much simpler configuration. To do. The test signal output from the test signal generating means is input to the inspecting means via the converting means or via the reproducing signal processing section, the converting means and the recording signal processing section, and is output from the test signal generating means. By inputting the test signal directly to the inspection means, the error of the conversion means can be inspected. Therefore, the inspection means for inspecting the state of the magnetic transmission line can be shared for inspection of the conversion means, and the conversion means can be inspected with a much simpler structure.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Field of Industrial Application Conventional Technology Problem to be Solved by the Invention Means for Solving the Problem (FIG. 1) Action (FIG. 1) Example (FIG. 1) Effect of the Invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and is particularly suitable for being applied to a recording / reproducing apparatus having a so-called REC VERIFY circuit for inspecting a recording / reproducing state.

[0003]

2. Description of the Related Art Conventionally, for example, in a recording / reproducing apparatus for recording / reproducing a digital audio signal, a REC VERIFY circuit for inspecting whether or not an audio signal is correctly recorded / reproduced in a magnetic transmission system including a magnetic recording medium is provided. It is provided.

The REC VERIFY circuit compares the recording data input to the encoder of the recording system and the reproduction data signal output from the reproducing system via the encoder, the recording head, the magnetic tape, the reproducing head and the decoder, respectively. In a magnetic recording / reproducing system, it is possible to judge whether or not audio data is correctly recorded and reproduced.

[0005]

A recording / reproducing apparatus of this kind is provided with a format conversion circuit section for converting externally inputted audio data into an internal format, and the format conversion circuit section is provided. In order to judge whether or not it is operating properly, a dedicated circuit for the judgment process must be provided, and the structure of the recording / reproducing apparatus becomes complicated accordingly.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose a recording / reproducing apparatus capable of inspecting an operation error of a format conversion circuit section with a much simpler structure.

[0007]

In order to solve such a problem, in the first invention, the digital signal D _IN1 inputted from the outside is converted into an internal format by a predetermined converting means 4, and then the digital signal D _IN1 is converted. _IN1 is recorded on and reproduced from a predetermined recording medium 23, and the recording medium 2
In the recording / reproducing apparatus 1 for inspecting the recording / reproducing state with respect to the recording medium 23 by comparing the digital signal D _REC recorded in 3 with the digital signal D _PB reproduced from the recording medium 23 by the inspection means 15, a predetermined test is performed. The test signal S _TEST output from the signal generation means 30 is input to the inspection means 15 via the conversion means 4, and the test signal S _TEST output from the test signal generation means 30 is input directly to the inspection means 15 and converted. The test signal S _TEST input to the inspection means 15 via the means 4 and the inspection means 15
The test signal S _TEST directly input to is compared by the inspection means 15, and the conversion means 4 is inspected.

According to the second aspect of the invention, the digital signal D _IN1 input from the outside is converted into the internal format by the predetermined converting means 4, and then the recording signal processing means 1 is used.
1 is recorded on a predetermined recording medium 23, and the recorded digital signal D _IN1 is reproduced from the recording medium 23, and then output via the reproduction signal processing means 27 and recorded on the recording medium 23. _REC and recording medium 23
In the recording / reproducing apparatus 1 for inspecting the recording and reproducing states on the recording medium 23 by comparing the digital signal D _PB reproduced from the test means 15, the test signal S output from the predetermined test signal generating means 30. _TEST
Is inputted to the inspection means 15 via the reproduction signal processing means 27, the conversion means 4 and the recording signal processing means 11, and
Test signal S output from the test signal generating means 30
_TEST is directly input to the inspection means 15 to reproduce signal processing means 2
7 and conversion means 4 and recording signal processing means 11 the test signal is input to the inspection unit 15 through the S _TEST and inspection means a test signal S _TEST input directly to the testing means 15 1
5, the reproduction signal processing means 27, the converting means 4 and the recording signal processing means 11 are inspected.

[0009]

Operation: Digital signal D _REC recorded on the recording medium 23
Also, the test signal S _TEST output from the test signal generating means 30 is converted into the inspection means 15 for inspecting the recording and reproducing states on the recording medium 23 by comparing the digital signal D _PB reproduced from the recording medium 23. The test signal S _TEST output from the test signal generating means 30 is directly input to the inspection means 15 while being input via the means 4 or via the reproduction signal processing section 27, the converting means 4 and the recording signal processing section 11. As a result, the conversion means 4 or
The inspection means 15 can inspect the converter 4, the reproduction signal processor 27, and the recording signal processor 11 for errors. Therefore, the inspection means 15 for inspecting the recording / reproducing state of the magnetic transmission line can be shared for inspection of the conversion means 4, and the inspection of the conversion means 4 can be executed with a much simpler configuration.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a recording / reproducing apparatus for recording / reproducing a digital audio signal as a whole, and A inputted through a digital audio interface is denoted by A.
A digital audio signal D _IN1 of ES / EBU format is input to the receiving section 4A of the format conversion circuit section 4 through the first input terminal 2A of the switch circuit 2.

The receiving unit 4A converts the digital audio signal D _IN1 input by the AES / EBU format into a data format which can be processed by the recording / reproducing apparatus 1, and then continues the digital audio signal D _IN2 converted by the format. It is sent to the recording signal processing unit 11 of the signal processing circuit unit 10.

The recording signal processing unit 11 obtains recording data D _REC by applying an error correction code to the input digital audio signal D _{IN2 and} performing a shuffling process or the like. The recording data D _REC is converted into a recording signal S _REC by the encoder 21 and then recorded on the magnetic tape 23 via the magnetic head 22A.

From the magnetic tape 23 to the magnetic head 22B
The reproduced signal S _PB reproduced via the signal is demodulated into reproduced data D _PB in the decoder 25, and the reproduced signal processing unit 27 continues.
At, a digital audio signal D _OUT1 similar to the above digital audio signal D _IN2 is obtained, and this is sent to the transmitting section 4B of the format conversion circuit section 4 via the second input terminal 29B of the switch circuit 29.

The transmitting unit 4B outputs a digital audio signal D _OUT1 which is an internal format of the recording / reproducing apparatus 1 to the A signal.
After converting to a digital audio signal D _OUT2 composed of ES / EBU format, this is converted into the second signal of the switch circuit 3.
From the output end 3B of the digital audio interface to a digital audio interface (not shown).

Further, the second input terminal 2B of the switch circuit 2 and the first output terminal 3A of the switch circuit 3 are connected to each other, and the switch circuit 2 is switched to the second input terminal 2B and the switch circuit 3 is switched to the first switch terminal. The digital audio signal D _OUT1 output from the transmission section 4B of the format conversion circuit section 4 can be input to the reception section 4A via the switch circuits 3 and 2 by switching to the output terminal 3A.

Here, the switch circuit 12 inputs the digital audio signal D _IN2 output from the receiving section 4A to the first input terminal 12A and outputs the recording data D _REC output from the recording signal processing section 11 to the second input terminal 12A. It is input to the input terminal 12B, and these are switched and input to the recording state inspection circuit (hereinafter referred to as REC VERIFY circuit) 15.

The switch circuit 17 inputs the reproduction data D _PB output from the decoder 25 to the second input terminal 17B and outputs the test signal S _TEST output from the test signal generating circuit 30 to the first input terminal 17A. To enter.

The test signal S _TEST output from the test signal generation circuit 27 is input to the first input terminal 29A of the switch circuit 29.

Accordingly, the switch circuit 29 is connected to the first input terminal 2
9A, the switch circuit 12 is switched to the first input terminal 12A, the switch circuit 3 is switched to the first output terminal 3A, and the switch circuit 2 is switched to the second input terminal 2B. The test signal S _TEST output from 30 is the switch circuit 2
It is adapted to be input to the REC VERIFY circuit 15 via the transmission unit 4, the transmitting unit 4B, the switch circuit 3, the switch circuit 2, the receiving unit 4A and the switch circuit 12.

A switch circuit 28 is provided between the test signal generation circuit 30 and the reproduction signal processing section 27.
By turning on the switch circuit 28, the test signal S _TEST output from the test signal generating circuit 30 can be input to the second input terminal 29B of the switch circuit 29 via the reproduction signal processing section 27. ing.

At this time, the switch circuit 29 is switched to the second input terminal 29B, the switch circuits 3 and 2 are switched to the first output terminal 3A and the second input terminal 2B, respectively, and the switch circuit 12 is switched to the second terminal. By switching to the input terminal 12B, the test signal S _TEST output via the reproduction signal processing unit 27 has a switch circuit 29, a transmitter 4B, a switch circuit 3, a switch circuit 2, a receiver 4A,
REC via the recording signal processing unit 11 and the switch circuit 12
The input signal is input to the VERIFY circuit 15.

In the above structure, when it is determined whether or not the recording data D _REC is correctly recorded and reproduced in the magnetic transmission system including the magnetic tape 23, the switch circuits 2 and 3 are connected to the first input terminal 2A and the first input terminal 2A, respectively. 2 and the switch circuit 29 is switched to the second input terminal 2B.
By switching to 9B and controlling the switch circuit 28 to the off state, the digital audio signal D input through the digital audio interface is input.
_IN1 is recorded on the magnetic tape 23, and the digital audio signal D recorded on the magnetic tape 23 is recorded.
After switching _IN1 to a state in which it is output as a digital audio signal D _OUT2 , switch circuits 12 and 1
By switching 7 to the second input terminals 12B and 17B respectively, the recording data D _REC output from the recording signal processing unit 11 is input to the REC VERIFY circuit 15 via the switch circuit 12 and is output from the decoder 25. Playback data D _PB to be REC VERIFY via the switch circuit 17.
Input to the circuit 15.

Accordingly, the REC VERIFY circuit 15 uses the recording data D.
By comparing the _REC and the reproduction data D _PB , the operation state of the recording / reproducing system including the encoder 21, the magnetic head 22A, the magnetic tape 23, the magnetic head 22B, and the decoder 25 can be inspected.

On the other hand, the format conversion circuit unit 4
When inspecting the operation of, the switch circuits 2 and 3 are switched to the second input terminal 2B and the first output terminal 3A, respectively, and the switch circuit 29 is switched to the first input terminal 29A. Further, the switch circuit 28 is turned off, and the switch circuits 12 and 17 are connected to the first input terminal 12 respectively.
By switching to A and 17A, the test signal S _TEST output from the test signal generating circuit 30 is passed through the switch circuit 29, the transmitter 4B, the switch circuit 3, the switch circuit 2, the receiver 4A and the switch circuit 12 to the REC VERI
Input to FY circuit 15 and test signal generation circuit 30
The test signal S _TEST output from is directly input to the REC VERIFY circuit 15 via the switch circuit 17.

Accordingly, the test signal S _TEST which has been once converted into the format through the transmitting section 4B is converted into the internal format again in the receiving section 4A, and the REC VERIFY circuit 15 is provided.
By being input, in the REC VERIFY15, comparing the transmission unit 4B and the test signal inputted via the receiving section 4A S _TEST and the test signal S _TEST input directly from the test signal generating circuit 30 that the You can

If there is a difference in the comparison result,
This indicates that the operation of the format conversion circuit unit 4 is abnormal, and the REC VERIFY circuit 15 outputs an error signal S _ER indicating the abnormality to notify the user. As a result, it is possible to inspect the format conversion circuit section 4 of the recording / reproducing apparatus 1 for defects.

As described above, in the recording / reproducing apparatus 1, the magnetic transmission system including the magnetic tape 23 (encoder 2
1, magnetic head 22A, magnetic tape 23, magnetic head 2
2B, the decoder 25) can be used to inspect the operating state of the format conversion circuit section 4 by using the REC VERIFY circuit 15 for inspecting recording and reproducing errors.

Therefore, since the REC VERIFY circuit 15 is used in common, the structure of the recording / reproducing apparatus 1 can be simplified as compared with the case where the inspection circuit of the format conversion circuit section 4 is separately provided.

According to the above structure, the RE for comparing the recorded data and the reproduced data originally provided in the recording / reproducing apparatus.
Since the operation of the format conversion circuit unit 4 is inspected by using the C VERIFY circuit 15, the inspection of the format conversion circuit unit 4 can be performed with a much simpler configuration.

In the above embodiment, the case where only the format conversion circuit section 4 is inspected has been described.
The present invention is not limited to this, and the inspection may be performed by including the reproduction signal processing unit 27 and the recording signal processing unit 11.

In this case, the switch circuit 28 is turned on, the switch circuit 29 is switched to the second input terminal 29B side, and the switch circuit 12 is switched to the second input terminal 12B.
And the switch circuit 17 is switched to the first input terminal 1
By switching to 7 A, the test signal generating circuit 30
The test signal S _TEST output from the switch circuit 28,
Reproduction signal processing unit 27, switch circuit 29, transmission unit 4B,
REC VERIFY via the switch circuit 3, the switch circuit 2, the receiver 4A, the recording signal processor 11 and the switch circuit 12.
It is input to the circuit 15.

Therefore, in the REC VERIFY circuit 15, the test signal S _TEST output from the recording signal processing section 11 is outputted.
And the test signal S _TEST directly input from the test signal generation circuit 30 are compared to obtain the reproduction signal processing unit 2
7, the operation error of the recording signal processing unit 11, the transmission unit 4B, and the reception unit 4A can be detected.

Therefore, when an operation error is detected from the inspection result, the above-described inspection of the format conversion circuit section 4 is performed, and the recording signal processing section 11 and the reproduction signal processing section 27 or the format conversion circuit section is executed. It is possible to determine which of the four has an operation error.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the recording / reproducing apparatus 1 for recording / reproducing audio data has been described, but the present invention is not limited to this, and various other digital signals are recorded / reproduced. The present invention can be widely applied to digital signal recording / reproducing devices that operate.

[0036]

As described above, according to the present invention, the digital signal inputted from the outside is converted into the internal format by the predetermined converting means, and then the digital signal is recorded and reproduced on the predetermined recording medium. In addition, in the recording / reproducing apparatus for inspecting the recording and reproducing states on the recording medium by comparing the digital signal recorded on the recording medium and the digital signal reproduced from the recording medium by the inspection means, The output test signal is input to the inspection means through the conversion means or the reproduction signal processing section, the conversion means, and the recording signal processing section, and the test signal output from the test signal generation means is directly input to the inspection means. By doing so, the error of the conversion means can be inspected. Therefore, the inspection means for inspecting the state of the magnetic transmission line can be shared for the inspection of the conversion means, and a recording / reproducing apparatus capable of executing the inspection of the conversion means can be realized with a much simpler structure.

[Brief description of drawings]

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

[Explanation of symbols]

1 ... Digital signal recording / reproducing device 2, 3, 12, 1
7, 28, 29 ... Switch circuit, 4 ... Format conversion circuit section, 4A ... Reception section, 4B ... Transmission section, 11 ...
Recording signal processor, 15 REC VERIFY circuit, 27
Reproduction signal processing unit, 30 ... Test signal generation circuit.

Claims (2)

[Claims] 1. A digital signal input from the outside is converted into an internal format by a predetermined conversion means, and then the digital signal is recorded and reproduced on a predetermined recording medium and recorded on the recording medium. In a recording / reproducing apparatus for inspecting a recording and reproducing state with respect to the recording medium by comparing the digital signal and the digital signal reproduced from the recording medium by an inspecting means, a test signal output from a predetermined test signal generating means. Is input to the inspection means via the conversion means,
The test signal output from the test signal generation means is directly input to the inspection means, and the test signal input to the inspection means via the conversion means and the test signal directly input to the inspection means are input. A recording / reproducing apparatus characterized in that the conversion means is inspected by making a comparison by the inspection means. 2. A digital signal input from the outside is converted into an internal format by a predetermined conversion means, and then recorded on a predetermined recording medium through a recording signal processing means, and the recorded digital signal is recorded as described above. The recording medium is reproduced by the recording medium and then output through the reproduction signal processing means, and the digital signal recorded on the recording medium and the digital signal reproduced from the recording medium are compared by the inspecting means. In a recording / reproducing apparatus for inspecting the recording and reproducing states for the test signal, a test signal output from a predetermined test signal generating means is input to the inspecting means through the reproducing signal processing means, the converting means and the recording signal processing means. With
The test signal output from the test signal generation means is directly input to the inspection means, and the test signal input to the inspection means via the reproduction signal processing means, the conversion means and the recording signal processing means, A recording / reproducing apparatus characterized in that the test signal directly inputted to the inspecting means is compared by the inspecting means to inspect the reproducing signal processing means, the converting means and the recording signal processing means. ..