JPH1074151A - Data recording/reproducing device with self-diagnostic function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a highly reliable self-diagnostic function by using a diagnostic means having an operation clock different from a normal operation clock in a data recording/reproducing device. SOLUTION: In the case of diagonsing the operation of a data processing means 3, a 1st switching means 2 inputs diagnostic data outputted from a diagnostic means 6 to the means 3. The means 3 executes data format changing processing. At the time of executing the operation diagnosis of the means 3, a 2nd switching means 4 outputs result data to the means 6 through a 2nd data speed converting means 5. The means 6 stores the diagnostic data and a result expectation to be result data when the means 3 correctly processes the diagnostic data, outputs the diagnostic data, executes a storage and a diagnosis of the result data, and generates a diagnostic result. A display means 7 display the diagnostic result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording / reproducing apparatus for recording data in a storage device and reproducing the data recorded in the storage device, and more particularly to a data recording / reproducing device having a self-diagnosis function.

[0002]

2. Description of the Related Art Video devices and the like include a device for recording data received from the outside in a storage device and a device for reproducing data recorded in the storage device and outputting the data to the outside.
A data recording / reproducing device is built in. This is a device having a function of converting data as needed when the level and format of data that can be handled by the external device and the storage device are different.

As a method of checking whether such a data recording / reproducing apparatus operates normally, there is a method of giving a self-diagnosis function to a CPU controlling the data recording / reproducing apparatus.

[0004]

However, in the usual case,
The clock of the input / output data from the external device does not match the operation clock of the CPU controlling the data recording / reproducing device. Therefore, in the related art, only a rough operation check can be performed, and there is a portion that cannot be detected even if a failure has occurred, or it has been difficult to specify a failure portion in the apparatus even if an operation abnormality can be detected.

The present invention has been made in view of the above points, and has been made in consideration of an input / output clock for external data and a control C / C.
It is an object of the present invention to provide a data recording / reproducing apparatus which can check the operation of each unit in the apparatus even if the operation clock of the PU is different.

[0006]

According to the present invention, there is provided a data recording / reproducing apparatus having a self-diagnosis function which records data in a storage device and reproduces data recorded in the storage device. First data speed changing means for changing the speed of input diagnostic data, first switching means for selecting the diagnostic data from a plurality of input data as input data and switching circuit connection, Perform a data format change process, select a data processing means to be output data, and an output destination of the output data,
Second switching means for switching circuit connection, second data speed changing means for changing the speed of the output data, the diagnostic data, and result data when the data processing means correctly processes the diagnostic data. The diagnostic data is input to the first data rate changing means, and the output data input from the second data rate changing means is held as the result data. A data recording / reproducing apparatus having a self-diagnosis function, comprising: a diagnosis unit for generating a diagnosis result; and a display unit for displaying the diagnosis result.

In such a data recording / reproducing apparatus, when operating the self-diagnosis function, the first data speed changing means converts the speed of the diagnostic data. Then, the first switching unit switches the circuit connection by selecting diagnostic data as input data from the plurality of input data. The data processing means performs a format change process for changing the format of the input data,
Output data. The second switching unit selects an output destination of the output data output from the data processing unit and switches a circuit connection. A second data speed changing means changes the speed of the output data. Then, the diagnostic means, which holds the diagnostic data and the expected result to be the result data when the data processing means correctly processes the diagnostic data, inputs the diagnostic data to the first data rate changing means and performs the second
The output data input from the data speed changing means is held as result data to generate a diagnosis result. The display means displays a diagnosis result.

As described above, since the data speed changing means is provided between the data processing means and the diagnostic means to input and output the diagnostic data and the result data, the operation speeds of the data processing means and the diagnostic means are different. Also, a highly reliable self-diagnosis function can be realized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the principle of the present invention.

A data recording / reproducing apparatus having a self-diagnosis function according to the present invention records data in a storage device and reproduces data recorded in the storage device. When operating the self-diagnosis function, the data recording / reproducing apparatus selects first data speed changing means 1 for changing the speed of input diagnostic data, and selects diagnostic data from a plurality of input data as input data. First switching means 2 for switching circuit connection, data processing means 3 for performing format change processing of input data and outputting data, and second switching means for selecting an output destination of output data and switching circuit connection. 4 and second data rate changing means 5 for changing the rate of output data
, Diagnostic data, and a result schedule that should become result data when the data processing means correctly processes the diagnostic data, and stores the diagnostic data in the first data rate changing means 1.
And a display unit 7 for generating a diagnostic result by holding output data input from the second data rate changing unit 5 as result data and generating a diagnostic result, and a display unit 7 for displaying the diagnostic result. I have.

Here, the first switching means 2 normally inputs data whose format is to be changed to the data processing means 3. However, when diagnosing the operation of the data processing means 3, the diagnostic data output from the diagnosing means 6 via the first data rate conversion means 1 is input to the data processing means 3. Similarly, the second switching unit 4 normally outputs the data whose format has been changed to the next stage in the data recording / reproducing apparatus, but when the operation diagnosis of the data processing unit 3 is performed, , And outputs the result data to the diagnosis means 6 via the second data rate conversion means 5.

The diagnostic means 6 has a diagnostic data holding unit 6a for holding diagnostic data for diagnosing the operation of the data processing means 3.
A diagnostic data output unit 6b for outputting diagnostic data, a result schedule holding unit 6c for holding a result when the data processing unit 3 has normally processed the diagnostic data as a scheduled result, and holding the input result data. Result data holding unit 6d
And a diagnosis result output unit 6e that performs a diagnosis by collating the result schedule with the result data and outputs a diagnosis result.

As described above, according to the present invention, the data rate conversion means is provided between the portion for performing the normal processing and the portion for outputting the diagnostic data and diagnosing the result so as to absorb the speed difference. Therefore, the normal operation of the self-diagnosis function is possible even when circuits having different numbers of clocks are combined.

Next, a description will be given of a data recording / reproducing apparatus to which this principle is actually applied. FIG. 2 is a block diagram showing the configuration of the first embodiment of the data recording / reproducing apparatus of the present invention. The correspondence between the configuration shown in FIG. 1 and the configuration shown in FIG. 2 will be described after the description of FIG.

The data recording / reproducing apparatus 10 of the present embodiment
Is a device for inputting and outputting data between the external devices 21a and 21b and the storage device 22. This storage device 2
2 may be of a type installed outside, such as a hard disk.

Here, the data recording / reproducing apparatus 10 comprises: a receiving signal converter 11a for converting a received signal input from the external device 21a into an input data signal in a format which can be handled by the data recording / reproducing apparatus 10; A reception data processing unit 12a for performing processing necessary for recording in the storage device 22;
/ F13 and a transmission data processing unit 1 that performs processing for transmitting an output data signal reproduced from the storage device 22 to the outside.
2b and the processed output data signal to an external device 2
1b, and a CP for controlling the data recording / reproducing apparatus 10
U14 and the FI holding the processed output data signal
FO (First-In-First-Out) memory 15b and CPU 1
4, a FIFO memory 15a for holding the self-diagnosis data, a switch 16a for inputting a reception signal which is normally input from the external device 21a to the reception signal conversion unit 11a, and an output which is normally output from the reception signal conversion unit 11a. A switch 16b for inputting the input data signal to the reception data processing unit 12a, and a switch 16c for connecting the I / F 13 to the storage device 22 in general.

First, the normal operation of the data recording / reproducing apparatus 10 will be described. When it is desired to record the received signal input from the external device 21a in the storage device 22, each component of the data recording / reproducing device 10 performs the following processing based on the control of the CPU 14. External device 21
a received signal from the data storage / reproduction device 10
Often have electrical properties that cannot be handled internally. That is why the reception signal converter 11a is provided to perform data conversion. The reception signal converter 11a
Converts a received signal input from the external device 21a,
The input data signal is input to the reception data processing unit 12a. The reception data processing unit 12a performs processing necessary for recording the input data signal in the storage device 22, prepares the input data signal into an appropriate format, and converts the processed input data signal into an I / O signal.
/ F13 in the storage device 22.

When the data recorded in the storage device 22 is to be reproduced and output from the external device 21b, the components of the data recording / reproducing device 10 perform the following processing under the control of the CPU 14. Transmission data processing unit 12b
Performs a process for reproducing an output data signal from the storage device 22 via the I / F 13, outputting the data signal to the external device 21b, adjusting the format to an appropriate format, and converting the processed output data signal to the transmission signal converter 11b. To enter. The transmission signal converter 11b converts the electrical property of the output data signal so that it can be transmitted to the outside, and outputs it as a transmission signal to the external device 21b.

The received data processing unit 12 shown in FIG.
"a" corresponds to the data processing means 3 shown in FIG.
At this time, the switch 16b shown in FIG. 2 is connected to the first switching means 2 shown in FIG.
The memory 15a corresponds to the first data rate converting means 1 shown in FIG. 1, and the I / F 13 shown in FIG. 2 corresponds to the second switching means 4 and the second data rate converting means 5 shown in FIG. 2 correspond to the diagnostic means 6 shown in FIG.

The transmission data processing unit 12 shown in FIG.
b also corresponds to the data processing means 3 shown in FIG.
At this time, the I / F 13 shown in FIG. 2 is connected to the first switching means 2 and the first data rate conversion means 1 shown in FIG. 1, and the FIFO memory 15b shown in FIG. 2 switching means 4 and second data rate conversion means 5
In addition, the CPU 14 shown in FIG.
, Respectively.

Next, a case where the self-diagnosis function of the data recording / reproducing apparatus 10 is operated will be described. First, the reception data processing unit 12a and the transmission data processing unit 12b
A description will be given of the operation check with.

FIG. 3 is a diagram showing a connection state when an operation check is performed between the reception data processing unit and the transmission data processing unit. Note that the configuration in this figure is basically the same as the configuration shown in FIG. 2, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

When checking the operation of the reception data processing unit and the transmission data processing unit, the switch 16 shown in FIG.
b and 16c are switched by the CPU 14. Thus, the input to the reception data processing unit 12a is the FIFO memory 15a, and the access destination of the I / F 13 is the CPU 1
It becomes 4.

The CPU 14 includes a storage device such as a ROM, and stores operation check data.
Usually, the clock of the reception signal and the transmission signal is much faster than the operation clock of the CPU. Therefore, CPU
Even if the operation check data is directly input from 14 to the reception data processing unit 12a, the timing does not match. Therefore,
In the present embodiment, when performing an operation check of the reception data processing unit 12a, the CPU 14 temporarily inputs operation check data to the FIFO memory 15a. Thereafter, the reception data processing unit 12a acquires operation check data from the FIFO memory 15a via the switch 16b. Here, the input of the operation check data from the CPU 14 to the FIFO memory 15a is performed in synchronization with the operation clock of the CPU 14, and the FIFO of the reception data processing unit 12a is used.
Acquisition of operation check data from the memory 15a is performed in synchronization with a clock of a normal received signal.

The received data processing unit 12a processes the acquired operation check data in the same manner as a normal input data signal, and inputs the processed data to the CPU 14 via the I / F 13. At this time, the I / F 13 treats the CPU 14 as a low-speed storage device. The CPU 14 determines whether or not the input data matches the expected result, and sets a diagnosis result indicating whether or not the operation of the received data processing unit 12a is normal. Then, the diagnosis result is displayed on a display device (not shown). By processing the operation check data along the loop R1, the operation of the reception data processing unit 12a can be checked.

In the present embodiment, when the operation of the transmission data processing unit 12b is checked, the CPU 14 inputs operation check data to the transmission data processing unit 12b via the I / F 13. At this time, the I / F 13 is connected to the CPU 14
Is treated as a low-speed storage device. Transmission data processing unit 12b
Processes the input operation check data in the same manner as a normal output data signal, and inputs the processed data to the FIFO memory 15b. The CPU 14 acquires the processed operation check data from the FIFO memory 15b, performs a diagnosis, and outputs a diagnosis result. As described above, the operation check of the transmission data processing unit 12b can be performed by processing the operation check data along the loop R2.

Next, the operation check of the reception signal converter 11a and the transmission signal converter 11b will be described. FIG.
FIG. 4 is a diagram illustrating a connection state when an operation check is performed between a reception signal conversion unit and a transmission signal conversion unit. The configuration in this figure is also basically the same as the configuration shown in FIG. 2, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

The reception signal converter 11a and the transmission signal converter 1
When performing an operation check with 1b, it is previously confirmed that the reception data processing unit 12a and the transmission data processing unit 12b operate normally. The switches 16a and 16c shown in FIG.
Thus, the input to the reception signal conversion unit 11a becomes the transmission signal conversion unit 11b, and the access destination of the I / F 13 is the CPU.
It becomes 14.

In this embodiment, the received signal converter 11a
When the operation check between the transmission signal conversion unit 11b and
The CPU 14 inputs the operation check data to the transmission data processing unit 12b via the I / F 13. At this time, I / F
13 treats the CPU 14 as a low-speed storage device. The transmission data processing unit 12b processes the input operation check data in the same manner as a normal output data signal, and inputs the processed data to the transmission signal conversion unit 11b. The transmission signal conversion unit 11b converts the input data into a property that can be electrically transmitted to the outside similarly to a normal output data signal.
The signal is input to the reception signal conversion unit 11a via a. Then, the reception signal conversion unit 11a converts the input data into a property that can be electrically handled in the data recording / reproducing device 10b, similarly to a normal reception signal, and receives the data via the switch 16b. To enter. The reception data processing unit 12a processes the input data in the same manner as a normal input data signal, and inputs the processed data to the CPU 14 via the I / F 13. The CPU 14 obtains the result data of the operation check data returned through all the circuits, performs a diagnosis,
Give a diagnostic result. Since it is previously confirmed that the reception data processing unit 12a and the transmission data processing unit 12b operate normally, it is considered that this diagnosis result depends only on the reception signal conversion unit 11a and the transmission signal conversion unit 11b. Should be fine. Thus, the reception signal conversion unit 1
The operation check between 1a and the transmission signal converter 11b can be performed by processing the operation check data along the loop R3.

In the embodiment described above, even if an operation failure is diagnosed as a result of the operation check, it is determined which of the reception signal conversion unit 11a and the transmission signal conversion unit 11b has the operation failure. I can't identify,
Data recording / reproducing such that there are multiple reception systems (combined reception signal conversion unit and reception data processing unit) or transmission systems (combination of transmission signal conversion unit and transmission data processing unit) The device allows this identification.

FIG. 5 is a block diagram showing the configuration of a data recording / reproducing apparatus according to a second embodiment of the present invention. The data recording / reproducing apparatus of the present embodiment has a plurality of transmission systems.
The data recording / reproducing device 30 of the present embodiment is a device for inputting / outputting data between the external devices 41a, 41b, 41c and the storage device. This storage device 42
It may be a form installed outside, such as a hard disk.

Here, the data recording / reproducing apparatus 30 includes a receiving signal converter 31a for converting a received signal input from the external device 41a into an input data signal in a format that can be handled by the data recording / reproducing apparatus 30, and an input data signal Data processing unit 32a for performing processing necessary for recording the data in the storage device 42, an I / F 33 for interfacing with the storage device 42, and an external data signal for transmitting an output data signal reproduced from the storage device 42 to the outside. Transmission data processing units 32b and 32c that perform processing, transmission signal conversion units 31b and 31c that convert processed output data signals into transmission signals that can be handled by the external devices 41b and 41c, and the data recording / reproducing device 30. CPU 34 including a storage device such as a ROM or a RAM therein, and self-diagnosis data output from the CPU 34. And the FIFO memory 35a for, FIFO memory 35 for holding output data signal having undergone the treatment
b, a switch 36a for switching an input to the reception signal conversion unit 31a, a switch 36b for switching an input to the reception data processing unit 32a, a switch 36c for switching an access destination of the I / F 33, and an output from the I / F 33. The switch 36d includes a switch 36d for switching, and a switch 36e for switching an input to the FIFO memory 35b.

Although not shown, the transmission data processing unit 32b and the transmission signal conversion unit 31b are collectively referred to as a transmission system B. Similarly, the transmission data processing unit 32c and the transmission signal conversion unit 31c are collectively referred to as a transmission system C.

To check the operation of the reception data processing unit 32a in this embodiment, the CPU 34 sets the switch 36b to the FIFO memory 35a and the reception data processing unit 32a.
a so that the switch 36c is connected to the I / F3
Switching control is performed so as to connect the CPU 3 to the CPU 34. Thereafter, the CPU 34 causes the FIFO memory 35a, the reception data processing unit 32a, and the I / F 33 to sequentially process the operation check data, and diagnoses the reception data processing unit 32a.

In this embodiment, the transmission data processing unit 3
When the operation check of 2b is performed, the CPU 34 sets the switch 36d to connect the I / F 33 and the transmission data processing unit 3 so that the switch 36c connects the I / F 33 and the CPU 34.
2b, and the switching control is performed so that the switch 36e connects the transmission data processing unit 32b and the FIFO memory 35b. Thereafter, the CPU 34 sets the operation check data to the I / F 33 and the transmission data processing unit 32b.
And the FIFO memory 35b in order to perform a diagnosis of the transmission data processing unit 32b. When the operation check of the transmission data processing unit 32c is performed, the same processing as the case where the operation check of the transmission data processing unit 32b is performed is performed. However, the switch 36d connects the I / F 33 to the transmission data processing unit 32c, and the switch 36e connects the transmission data processing unit 32c to the FIFO memory 35b.

Further, in the present embodiment, the reception signal conversion unit 31
A description will be given of a process for checking the operation of the transmission signal conversion units 31b and 31c with the transmission signal conversion unit 31a. FIG. 6 is a flowchart showing a procedure for checking the operation of the signal conversion unit in the data recording / reproducing apparatus of the present invention having a plurality of transmission systems. Hereinafter, description will be made along the steps in the figure. This operation check is performed by the reception data processing unit 32a,
An operation check is performed with the transmission data processing units 32b and 32c to confirm that all are normal. [S1] The CPU 34 selects any one of the transmission systems for which an operation check has not been performed yet. [S2] The CPU 34 controls the switching of the switches 36a, 36b, 36c and 36d so that the operation of the reception system and the transmission system selected in step S1 can be checked. Explaining this switching control as an example, if the selected transmission system is the transmission system B, the switch 36a performs switching control to connect the transmission signal conversion unit 31b and the reception signal conversion unit 31a. Further, the switch 36b is connected to the reception signal converter 31a.
The switch 36c connects the I / F 33 to the CPU 34, and the switch 36d connects the I / F 33 to the transmission data processing unit 32b. [S3] The CPU 34 checks the operation of the receiving system and the transmitting system selected in step S1. That is, using the example given in step S2, the operation check data is transmitted to the I / F 33 and the transmission data processing unit 32b.
, A transmission signal conversion unit 31b, and a reception signal conversion unit 31a
Then, the received data processing unit 32a and the I / F 33 sequentially process the data to diagnose the loop. [S4] The CPU 34 stores the diagnosis result in a storage device such as an internal RAM. [S5] It is determined whether there is still a transmission system for which an operation check has not been performed. If there is a transmission system for which an operation check has not yet been performed, the process proceeds to step S1 again. If the operation check has been completed for all the transmission systems, the process proceeds to step S6. [S6] The CPU 34 totalizes the diagnostic results accumulated in step S4 and displays them on a display device (not shown).

Here, for example, the diagnosis result of the reception system and the transmission system B (hereinafter, referred to as diagnosis result B) is “normal”, and the diagnosis result of the reception system and the transmission system C (hereinafter, this is referred to as “diagnosis result B”). Is referred to as a diagnosis result C).
It can be seen that an abnormality has occurred in the transmission system C, that is, the transmission signal conversion unit 31c.

Similarly, if the diagnostic result B is "abnormal" and the diagnostic result C is "normal", it is understood that an abnormality has occurred in the transmission system B, that is, the transmission signal converter 31b. If both the diagnosis result B and the diagnosis result C are “abnormal”, it is understood that an abnormality has occurred in the reception system, that is, the reception signal conversion unit 31a. If both the diagnosis result B and the diagnosis result C are “normal”, it is understood that all the components in the data recording / reproducing device 30 operate normally.

As described above, when the present invention is applied to a data recording / reproducing apparatus having a plurality of transmission systems, the number of operation checks can be increased, so that a more detailed diagnosis result is derived. In the above example, the case where there are a plurality of transmission systems has been described. On the contrary, even in a data recording / reproducing apparatus having a plurality of reception systems, the operation check can be performed in the same procedure.

In the operation check of each signal conversion unit (the reception signal conversion unit and the transmission signal conversion unit), the CPU and each signal conversion unit are not directly connected because the data to be input to the reception signal conversion unit and the transmission signal This is because the data output from the conversion unit has properties that are electrically different from data that can be handled inside the data recording / reproducing device. After confirming that the respective data processing units (the reception data processing unit and the transmission data processing unit) operate normally, the operation check through the reception data processing unit and the transmission data processing unit is performed. Since it is possible to inspect the signal conversion section, it is not necessary to particularly consider a conversion circuit or a connection line only for this operation check.

As described above, in the first and second embodiments of the present invention, since the FIFO memory for absorbing the difference between the operation clocks of each data processing unit and the CPU is provided, a highly reliable self-diagnosis function is provided. Can be realized.

Each of the data processing units described above actually includes a number of buffer memories and a buffer memory control circuit. FIG. 7 is a block diagram showing the internal configuration of the data processing unit.

The data processing unit 50 stores the data 6 to be processed.
0, and outputs the processed data 70 to a buffer memory control circuit 51, and buffer memories 52, 53, 5
4,...

Here, the buffer memory control circuit 51 controls all the processes performed by the data processing unit 50 using the buffer memories 52, 53, 54,. When performing an operation check on the data processing unit having such a configuration, it is desirable that an abnormality can be detected at a finer level. That is, when it is determined that an abnormality has occurred in the data processing unit, it is desired to specify in which buffer memory the abnormality is. Therefore, in the present invention, when checking the operation of the data processing unit, it is determined which buffer memory the output result data corresponds to.

FIG. 8 is a schematic diagram showing the relationship between input / output data and the buffer memory. Data 60 to be processed
Is input to the data processing unit and is distributed by the buffer memory control circuit 51 to the buffer memories 52, 53, and is processed. The processed data is collected by the buffer memory control circuit 51 and output as processed data 70. Therefore, by diagnosing the result data using data that uses all buffer memories as operation check data, it is possible to diagnose the buffer memory in each data processing device. When an abnormality is found in all of the result data, it is appropriate to consider that an abnormality has occurred in the buffer memory control circuit 51.

As described above, in this embodiment, the operation of each buffer memory in the data processing device can be checked. When an abnormality is found in the data processing device, an operation check can be performed on each of the buffer memories existing in the data processing device, so that it is not necessary to replace the entire data processing device at the time of recovery.

In the above description, it is assumed that the operation check data and the result schedule are stored in advance in a storage device such as the internal ROM of the CPU. It is also possible to input operation check data and a result schedule.

Further, the operation check data and the result schedule may be generated in the CPU every time the operation check is performed.

[0049]

As described above, according to the present invention, in the data recording / reproducing apparatus, the data speed converting means is provided between the data processing means for processing data before or after the data is reproduced and the diagnostic means. Provided. Thereby, when diagnosing the data processing means, it becomes possible to input diagnostic data and output result data at the same speed as the normal processing speed of the data processing means, thereby realizing a highly reliable self-diagnosis function.

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a configuration block diagram of a first embodiment of a data recording / reproducing device of the present invention.

FIG. 3 is a diagram illustrating a connection state when an operation check is performed between a reception data processing unit and a transmission data processing unit;

FIG. 4 is a diagram illustrating a connection state when an operation check is performed between a reception signal conversion unit and a transmission signal conversion unit;

FIG. 5 is a configuration block diagram of a data recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing a procedure for checking the operation of the signal conversion unit in the data recording / reproducing apparatus of the present invention having a plurality of transmission systems.

FIG. 7 is a block diagram illustrating an internal configuration of a data processing unit.

FIG. 8 is a schematic diagram showing a relationship between input / output data and a buffer memory.

[Explanation of symbols]

1 ... first data rate conversion means, 2 ... first switching means, 3 ... data processing means, 4 ... second switching means, 5
... Second data rate conversion means, 6... Diagnostic means, 6a
... Diagnostic data holding unit, 6b Diagnostic data output unit, 6
c: Result schedule holding unit, 6d: Result data holding unit, 6
e: diagnostic result output unit, 7: display means.

Claims (7)

[Claims] 1. A data recording / reproducing apparatus having a self-diagnosis function for recording data in a storage device and reproducing data recorded in the storage device, and for changing the speed of input diagnostic data. Speed changing means; first switching means for selecting the diagnostic data from a plurality of input data as input data and switching circuit connection; and data processing means for performing a format changing process of the input data and outputting the data. A second switching unit that selects an output destination of the output data and switches a circuit connection; a second data speed changing unit that changes a speed of the output data; and the diagnostic data and the diagnostic data The data processing means holds a result schedule that should become result data when the data processing is correctly performed, and inputs the diagnostic data to the first data rate changing means. A diagnostic means for holding the output data input from the second data rate changing means as the result data and generating a diagnostic result, and a display means for displaying the diagnostic result. A data recording / reproducing device having a self-diagnosis function. A diagnostic data holding unit for holding the diagnostic data; a diagnostic data output unit for outputting the diagnostic data; a result schedule holding unit for holding the result schedule; A result data holding unit to be held;
2. The data recording / reproducing apparatus having a self-diagnosis function according to claim 1, further comprising: a diagnosis result output unit configured to perform the diagnosis by comparing the result schedule with the result data and output the diagnosis result. . 3. The pre-recording data processing means for performing a format change process for recording data input from outside of the data recording / reproducing device in the storage device, or the data reproduced from the storage device. Post-reproduction data processing means for performing a format change process for outputting data to the outside of the data recording / reproducing apparatus, wherein the diagnostic data holding unit diagnoses the operation of the pre-recording data processing means as the diagnostic data. 3. The data recording / reproducing apparatus having a self-diagnosis function according to claim 2, wherein the apparatus retains data and data for diagnosing the operation of the post-reproduction data processing means. 4. A received signal input from outside of the data recording / reproducing device is converted into data in a format suitable for internal processing of the data recording / reproducing device, and the input signal is converted via the first switching means as the input data. A receiving signal converting means for inputting the data to the pre-recording data processing means, and a signal of a format suitable for external processing of the data recording / reproducing apparatus, which converts the data output from the post-reproduction data processing apparatus via the second switching means. And a transmission signal conversion unit for outputting the transmission data as a transmission signal to the outside of the data recording / reproducing apparatus. 4. The self-diagnosis function according to claim 3, further comprising data for diagnosing operations of the conversion unit, the reception signal conversion unit, and the data processing unit before recording. Data recording and reproducing device. 5. The data recording / reproducing apparatus having a self-diagnosis function according to claim 4, comprising a plurality of said pre-recording data processing means and said received signal conversion means. 6. A data recording / reproducing apparatus having a self-diagnosis function according to claim 4, comprising a plurality of said post-reproduction data processing means and said transmission signal converting means. 7. The data processing means has a storage element, and the diagnostic data holding section stores the diagnostic data as
3. The data recording / reproducing apparatus having a self-diagnosis function according to claim 2, further comprising data for diagnosing the operation of the storage element.