JPH03279881A - Digital equipment - Google Patents

Abstract

PURPOSE:To simplify a circuit block check function by providing a diagnostic loop signal system from a final-stage output means to an input means and performing control so that one of circuit blocks has a generator function and a checker function. CONSTITUTION:Setting data on a test mode and specification data on a generator and a checker which specify or operate a circuit block to be tested are inputted with key switches and those signals are supplied to a controller. A test signal generated by the generator 35 is fed back to the checker 36 of an input part 33 through a data processing part 38, a mixing part 42, an output part 46, and further a loop signal path 31. The test signal generated by the generator 35 is processed by the processing part 38 and mixing part 42 and the checker 36 of the input part 33 detects whether or not there is abnormality. When the abnormality is detected, an LED is turned on to easily judge whether or not there is the abnormality, thereby making a function check by the whole set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to digital equipment, and particularly to a digital equipment intended to facilitate function checks on circuit blocks within the equipment.

[Summary of the invention]

This invention provides a diagnostic loop signal system from the final output stage to the input stage in a digital device, and has a generator function that generates a test signal in at least one circuit block among a plurality of circuit blocks. By providing a control means that has a checker function that can detect abnormalities, the function of the circuit block can be checked at any time as needed, and the function check can be easily performed without taking much time. Moreover, the cost of function checking can be reduced compared to the conventional method.

[Conventional technology]

Conventionally, a generator for generating a test signal and a checker for detecting the presence or absence of an abnormality have been used to perform a function check on a device having a plurality of circuit blocks. This was done using a similar check system.

FIG. 4 shows a check system composed of a generator 71, a set 72, and a checker 73.

A generator 71 generates a test signal, e.g.
A sine wave, a pulse wave, etc. are formed and supplied to the set 72.

Inside the set foot, circuit blocks 72A, 72B, and 72G are connected in series from the input side to the output side as shown in the figure, and the above-mentioned test signal is transmitted to each circuit block 72A, 72B, and 72G.
After being subjected to predetermined signal processing at 2A to 72C, the signals are supplied to the checker 73.

The checker 73 observes the test signal output from the center 72 and checks the circuit blocks 72A to 72A inside the set foot.
This detects whether or not there is an abnormality in 72C.

Further, according to the check system shown in FIG. 5, a check board 74 provided with a generator circuit and a check circuit is prepared in advance, and this check board 74 is attached to the set 7.
The test signal outputted from the generator circuit of the check board VI 74 is supplied to the circuit block inside the Centra 2, and the test signal output from the generator circuit of the check board VI 74 is supplied to the circuit block inside the Centra 2. This detects whether there is an abnormality in the circuit block inside the set foot.

[Problem to be solved by the invention]

The conventional function check as described above has a problem in that a special check system must be constructed for the function check, regardless of whether it is the check system shown in FIG. 4 or FIG. 5. Therefore, there are problems in that the function check procedure is complicated, the function check takes a lot of time, and the cost required for the function check becomes high.

Particularly, as shown in FIG. 5, when creating a dedicated board 74 for chi, y"/re, the problem of increased cost occupies a large proportion.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a digital device in which functions of circuit blocks can be easily checked.

[Means to solve the problem]

This invention provides a loop signal system for diagnosis from the final output stage to the manual stage, and provides a generator function that generates a test signal in at least one circuit block among a plurality of circuit blocks, and a checker that can detect abnormalities. The configuration includes means for controlling the device to have the function.

[Effect]

The test signal generated from the generator of the circuit block is subjected to predetermined signal processing in the circuit block, and then
It is supplied to a checker, and this checker can perform a function check.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 5. This embodiment will be described in the following order.

(1) Overall system of digital audio mixer (2) Video sound processor (3) Modifications (1) Overall system of digital audio mixer FIG. 1 shows the overall configuration of a digital audio mixer.

In FIG. 1, 1 is a host computer, and this host computer 1 has a digital audio mixer 2.
For this purpose, various types of control B are performed, including schedule control related to program transmission and on-air timing control.

This digital audio mixer 2 includes an editor 3, an operation control panel 4, a switcher controller 5,
It mainly consists of a digital video switcher 6, a video sound processor 7, a cart machine 8.9, etc.

The editor 3 controls the overall operation of the digital audio mixer 2 based on various control signals supplied from the operation control panel 4 or the host computer 1. In this editor 3, control signals for controlling each circuit block are formed based on the above-mentioned control signals, and these control signals are sent to an operation control panel 4, a switcher controller 5, a digital video switcher 6, a video sound processor 7, etc. are supplied respectively.

The editor 3 also supplies control signals to the cart controller provided in each cart machine 8.9. By controlling this cart controller, each cart machine 8
．． For example, three player VTRs and one recorder VTR are selected from among the VTRs provided in the VTR 9, and audio signals and video signals are played back and supplied to the digital video switcher 6 and the video sound processor 7. Ru.

The digital video switcher 6 performs signal processing such as special effects and mixing on the video signal supplied from the player VTR, and the video sound processor 7 performs signal processing such as special effects and mixing.
For the audio signal supplied from the player VTR,
Signal processing such as special effects and mixing is applied. Thereafter, the processed audio and video signals are recorded on the recorder VTR in each cart machine 8.9. Under the control of the cart controller described above, audio and video signals are sent to the recorder V in each cart machine 8.9.
Recorded in TR.

The operation control panel 4 includes a display section showing the status of the system selected by the editor 3, for example, the VTR selected in the cart machine 8.9 described below.
A manual switch operation section is provided.

This operation control panel 4 is provided to manually operate the digital audio mixer 2 instead of the editor 3, and is a control signal that is generated by operating the switch operation part of the operation control panel 4. is supplied to the editor 3, switcher controller 5, video sound processor 7, etc., and further supplied to the cart machine 8.9 via the editor 3.

The switcher controller 5 controls the digital video switcher 6 based on control signals supplied from the operation control panel 4 or the editor 3.

Digital video switcher 6 takes in video signals reproduced from a plurality of player VTRs in cart machine 8.9. Then, this video signal is mixed and processed, and special effects such as effectors, wipes, scrolls, etc. are applied to the processed video signal, and the cart machine 8.9
The data is supplied to the recorder VTR in the recorder and recorded.

The video sound processor 7 is controlled based on control signals supplied from the operating control panel 4 or the editor 3. The video sound processor 7 takes in audio signals reproduced from a plurality of player VTRs in the cart machine 8.9. Then, for this audio signal, a signal processing function, such as an equalizer,
Perform processing such as dynamics and crossfades.

The processed audio signal is supplied to a recorder VTR in the cart machine 8.9 and recorded.

Each cart machine 8.9 is equipped with three player VTRs and one recorder VTR, and these VT
The cart controller controls the R, the elevator that supplies tape cassettes to the VTR, and the like.

Cart machine 8 is for programs, and cart machine 9 is for commercials. Furthermore, all the VTRs installed in the cart machine 8.9 mentioned above are digital VTs.
This is a VTR capable of forming recording patterns in the so-called D-1 or D-2 format. Therefore, four channels are required for one VTR, and 32 channels are required for two cart machines 8.9.

A video signal for transmission reproduced from a recorder VTR is taken out from a terminal 10.11 of this cart machine 8.9, and an audio signal for transmission is taken out from a terminal 12.13. In this embodiment, the player VTR
Although there are three recorders and one recorder VTR, the number is not limited to this, and any number can be set.

(2) About the video sound processor Figure 2 shows the following:
The configuration of a video sound processor 7 is shown.

The video sound processor 7 mainly includes a controller 21, a processor 22, a floppy disk drive 23, a key switch 24, a meter 25, and the like.

The controller 21 performs overall control of the video sound processor 7 based on control signals supplied from the editor 3 or the operation control panel 4.

A floppy disk drive 23 is controlled by the control signal from the controller 21, and the floppy disk drive 23 downloads a necessary program to the controller 21 from a floppy disk (not shown).

Further, the control data of the snapshot can be stored in a memory (not shown), and later the above-mentioned control data can be recorded on a floppy disk by the controller 21.

The processor 22 is installed in a rack, and is connected to the controller 21 by a 5-core multi-cable.
is connected to.

The processor 22 performs processing such as equalizer, dynamics, servo crossfader, A/B bus crossfader, filtering, delay, etc. on the audio signal reproduced and supplied from the player VTR, and also performs mixing.

The above-mentioned key switch 24 and meter 25 are provided on a not-shown adjustment console together with a switch operation section of the operating control panel 4, and a signal input from the key switch 24 is supplied to the controller 21. meter 25
For example, this uses a plasma display, and there are 6 bar-shaped ones that display the level. Of these, 2 are used for monitoring, and 4 are used for outputting 4 channels of signals. This is for displaying the level.

The internal configuration of the processor 22 described above is shown in FIG.

Inside the set, as shown in the figure, a plurality of circuit blocks are connected in cascade from the input side to the output side. Inside each circuit block, there are input/output selectors 34, 39, 43, 47 for selectively switching input/output signals, and generators 35, 40, 44, 48 that generate test signals under the control of the controller 21 in the test mode. and checkers 36, 41, 45, and 49 are provided, respectively, for detecting the presence or absence of abnormality under the control of the controller 21 in the test mode. Note that the above-mentioned test mode is a mode for self-diagnosing the presence or absence of an abnormality.

A loop signal path 31 for feeding back test signals is provided between the input stage circuit block and the output stage circuit block, and each circuit block is connected to the main bus 32 of the controller 21. .

An input/output selector 34, a generator 35, and a checker 36 are provided in the input section 33 as a circuit block of the input stage.

The input/output selector 34 selects signals on the input side and output side of the input section 33, respectively.

On the input side of the input/output selector 34, a selection is made between the audio signal from the terminal 37 or the test signal via the loop signal path 31, based on a control signal supplied from the controller 21 via the main bus 32. .

In the test mode for performing a function check, and under the condition that the input unit 33 is designated as a diagnostic circuit block for performing a function check, the test signal passing through the loop signal path 31 is selected, and the loop signal path 31 and the checker described above are selected. 3
6 is connected, a test signal is supplied to the checker 36, and the presence or absence of an abnormality is detected.

If the above conditions are not met, that is, in normal operation such as processing an audio signal, or if the input section 33 is not designated as a diagnostic circuit block that performs a function check, the audio signal or test signal is The signal is supplied as is to the output side of the input/output selector 34.

On the output side of the input/output selector 34, in the test mode,
One of the test signal generated by the generator 35 based on the control signal supplied from the controller 21 via the main bus 32 and the audio signal or test signal selected at the input terminal of the input/output selector 34, The selection is made under the control of the controller 21.

In the test mode and under conditions where the input section 33 is designated as a circuit block that generates a test signal, the test signal generated by the generator 35 is selected, and when the above conditions do not apply, the input/output selector The audio signal or test signal selected at the input side of 34 is selected.

The signal selected by this input/output selector 33 is supplied to the data processing section 38 at the next stage.

The data processing unit 38 is provided for each channel, and includes an input/output selector 39, a generator 40, a checker 41, and a circuit (not shown) that performs original signal processing. is provided.

On the input side of the input/output selector 39, based on the control signal supplied from the controller 21 via the main bus 32, the audio signal or test signal supplied from the input section 33 is sent to the checker 41 or a circuit that performs signal processing. Supply to one side.

In the test mode and under the condition that the data processing section 38 is designated as a diagnostic circuit block that performs a function check, the test signal supplied from the input section 33 is selected, and
This test signal is supplied to the checker 41, and the presence or absence of an abnormality is detected.

Further, if the above-mentioned conditions are not met, the above-mentioned audio signal or test signal supplied from the input section 33 is subjected to predetermined signal processing in the data processing section 38.

On the output side of the input/output selector 39, in the test mode,
One of the test signal generated by the generator 40 based on the control signal supplied from the controller 21 via the main bus 32 and the audio signal or test signal selected on the input side of the input/output selector 39, The selection is made under the control of the controller 21.

In the test mode and under the condition that the data processing section 38 is designated as a circuit block that generates a test signal, the test signal generated by the generator 4o is selected, and when the above conditions are not met, the input/output The audio signal or test signal selected at the input side of the selector 39 is selected. The signal selected by this input/output selector 39 is supplied to a mixer 42 at the next stage.

The mixer 42 mixes audio signals of multiple channels, and includes an input/output selector 43, a generator 44, and a checker 45 in addition to a circuit (not shown) that performs original signal processing. is provided.

On the input side of the input/output selector 430, based on the control signal supplied from the controller 21 via the main bus 32, the audio signal or test signal supplied from the data processing section 38 is sent to the checker 45 or a circuit that performs signal processing. Supply to one side.

In the test mode and under the condition that the mixer 42 is designated as a diagnostic circuit block that performs a function check, the test signal supplied from the data processor 38 is selected, and this test signal is also supplied to the checker 45 to detect an abnormality. The presence or absence of is detected.

Further, if the above-mentioned conditions are not met, the audio signal or test signal supplied from the data processing section 38 is subjected to predetermined signal processing in the mix section 42.

On the output side of the input/output selector 43, in the test mode,
One of the test signal generated by the generator 44 based on the control signal supplied from the controller 21 via the main bus 32 and the audio signal or test signal selected at the input side of the input/output selector 43 is selected. be done.

In the test mode and under the condition that the mixer 42 is designated as a circuit block that generates a test signal, the test signal generated by the generator 44 is selected, and if the above conditions do not apply, the input/output selector 4
The audio signal or test signal selected on the input side of No. 3 is selected. The signal selected by this input/output selector 43 is supplied to the output section 46 at the next stage.

In the output section 46, an input/output selector 47, a generator 48, and a checker 49 are provided.

On the input side of the input/output selector 47, an audio signal or a test signal supplied from the mixer 42 is selected based on a control signal supplied from the controller 21 via the main bus 32.

In the test mode and under the conditions where the output section 46 is designated as a diagnostic circuit block that performs a function check, the test signal supplied from the mix section 42 is selected, and this test signal is supplied to the checker 49 to detect abnormalities. A presence/absence detection is performed.

If the above conditions are not met, i.e. during normal operation,
The audio signal supplied from the mixer 42 is supplied to the output side of the input/output selector 47. Further, even in the test mode, if the output section 46 is not designated as a diagnostic circuit block that performs a function check, the test signal supplied from the mix section 42 is supplied to the output side of the input/output selector 47.

On the output side of the human output selector 47, a test signal generated by the generator 48 based on the control signal supplied from the controller 21 via the main bus 32 in the test mode and a signal selected on the input side of the input/output selector 47 are output. One of the test signal and the normal audio signal is selected under the control of the controller 21, the audio signal being applied to the terminal 50 and the test signal being applied to the loop signal path 31.
is supplied to

In the test mode and under conditions where the output section 46 is designated as a circuit block that generates a test signal, the test signal generated by the generator 48 is selected and supplied to the loop signal path 31.

Furthermore, even in the test mode, if the output section 46 is not designated as a circuit block that generates a test signal, the test signal supplied from the mix section 42 is supplied to the loop signal path 31, and furthermore, the test signal supplied from the mix section 42 is supplied to the loop signal path 31. in case of,
The audio signal supplied from the mixer 42 is connected to the terminal 5.
Extracted from 0.

According to the illustrated configuration, the presence or absence of an abnormality can be confirmed at the level of each circuit block or at the level of the entire set.

The test mode setting, the designation of the circuit block to be tested, or the designation of the generator and checker to be operated are inputted from the key switch 24, and these signals are supplied to the controller 21.

For example, when performing a function check on the entire set,
The controller 21 controls the generator 35 of the input section 33 to generate a test signal, and the generated test signal is sent to the input section via the data processing section 38, mix section 42, output section 46, and loop signal path 31. 33, the checker 36 is fed back.

The test signal generated by the generator 35 described above is subjected to signal processing in the data processing section 38 and the mixing section 42, respectively, and then the checker 36 of the input section 33 detects the presence or absence of an abnormality.

If an abnormality is detected, the LED can be configured to light up, making it possible to easily determine the presence or absence of an abnormality. This allows you to check the functionality of the entire set.

If it is confirmed that there is an abnormality in the above-mentioned function check of the entire set, the part where the abnormality exists can be specified. This is useful when each circuit block itself is normal, but there is an abnormality between boards, for example, a connector.

For example, when the test mode is set and the generator 35 and checker 45 to be activated are designated by operating the key switch 24, these signals are supplied to the controller 21. The controller 21 controls the operation of each circuit block based on the above-mentioned signals supplied from the key switch 24. Under the control of the controller 21, a test signal is generated by the generator 35 of the input section 33, and after being subjected to signal processing in the next stage data processing section 38 via the input/output selector 34 of the input section 33, the test signal is sent to the mix section. Checker 45 via input/output selector 43 of 42
is supplied to By detecting the presence or absence of an abnormality in the checker 45 of the mix section 42, the connector between the input section 33 and the data processing section 38, the connector inside the data processing section 38, or the connector between the data processing section 38 and the mix section 42 is connected. It is confirmed that there is an abnormality.

Similarly, by performing a function check on each of three consecutive circuit blocks, it is possible to identify the abnormal part.

The circuit block to be tested is not limited to one as in the above example, but may be performed over two or more circuit blocks.

In addition, an input section 33, a data processing section 38, a mix section 42
, at the output section 46, the generator 35.40.44
．． The test signal formed at 48 is transmitted to generator 35 .
40, 44, and 48 are provided, and the signal after signal processing is returned to the checker 36, 41, 45, and 49 of the circuit block. The section 33, data processing section 38, mix section 42, and output section 46 can be checked in each circuit itself.

In this way, after the test signal from the generator is processed by the target circuit block, abnormalities are detected by the checker of the next circuit block, so function checks can be performed as needed. The function check can be easily performed without taking much time, and the cost of the function check can be reduced compared to the conventional method.

(3) Modification Generators 35, 40, 4 provided in the input section 33, data processing section 3, mix section 42, and output section 46
It is also possible to replace the functions of the checkers 4.48 and 36.41.45.49 with the control of the controller 21 based on a program.

For example, the input section 33, the data processing section 38, the mix section 4
2. A register is provided in the output section 46, and the controller 21
Test data is supplied from the main bus 32 to the input section 33 , data processing section 38 , mix section 42 , and output section 46 .

In each circuit block, test data supplied from the controller 21 is taken into a register, the test data is read from the register, signal processing is performed based on the test data, and the result is stored in the register.

In response to a request from the controller 21, data stored in the register is read and analyzed by the controller 21. As a result, the input section 33, the data processing section 3
8. The functions of the mix section 42 and output section 46 are checked to detect the presence or absence of an abnormality. Note that, as in the case of the above-mentioned embodiment, the test data supplied from the controller 21 is sent to the input section 33, the data processing section 38, and the mix section 4.
2. Checking whether there is any abnormality in the entire set by processing the signal through the output unit 46 and the loop signal path 31;
A function check can be performed.

〔Effect of the invention〕

According to the digital device according to the present invention, after the test signal from the generator is processed by the target circuit block, the presence or absence of an abnormality is detected by the checker, so that the function of the circuit block can be checked as necessary. The function check can be performed at any time, the function check does not take much time, and the function check can be easily performed, and the cost of the function check can be significantly reduced compared to the conventional method.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a video sound processor,
FIG. 3 is a diagram showing the internal configuration of the processor, and FIGS. 4 and 5 are diagrams showing examples of conventional function checks. Explanation of main symbols in the drawings 2: Digital audio mixer, 22: Processor, 31: Loop signal path, 33: Input section, 35.40.44.48 Nizi generator, 36. 41. 45. 49, 3: Checker, 3rd: Data processing section, 42: Mix section, 6: Output section.

Claims (1)

[Claims] A loop signal system for diagnosis is provided from the final output stage to the input stage, and at least one of the plurality of circuit blocks has a generator function for generating a test signal and a function for detecting an abnormality. A digital device characterized in that it is provided with means for being controlled so as to have a checker function to obtain a checker function.