JPH0465994A - Video signal adjustment system - Google Patents

Abstract

PURPOSE:To easily set an adjustment point without utilizing a specific bus line by communizing a line used in the adressable control of the microcomputer circuit of a descrambler as it is and RF transferring a data signal for video adjustment modulated by an FSK modulation circuit. CONSTITUTION:A data signal 41 for video adjustment from a data signal generator 32 for video adjustment is inputted through an FSK modulation circuit 33 to a descrambler 49 by the RF transfer. By modulating a data signal 42 for modulation video adjustment by an FSK modulation circuit 34 to be inputted to a microcomputer circuit 35, the circuit 35 decodes the data signal 43 for video adjustment, outputs a pulse signal 45 necessary for video signal adjustment, and DC voltage 46 necessary for the video signal adjustment through a D/A conversion circuit 37 to an adjustment circuit 38. The video signal adjustment circuit 38 performs adjustment by using the DC voltage 46 based on a video signal 40 for adjustment inputted from a video signal generator 31 for adjustment, and outputs the result to a video signal detector 39 for monitor. The error of the adjustment is detected to be fed back to the device 32.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a video signal adjustment method that makes it possible to adjust video signals using a microcomputer circuit.

Conventional technology In recent years, with the rapid advancement of electronics, microcontrollers (
(Hardware and software) have been found to have various utility values, and are also contributing to the enhancement of functionality as products. Various video signal adjustment methods using such microcomputer circuits have been devised.

An example of the conventional video signal adjustment method mentioned above will be described below with reference to the drawings.

FIGS. 2 and 3 are configuration diagrams for explaining a conventional video signal adjustment method. In FIG. 2, 1 is a video signal generator for adjustment, 2 is a video signal adjustment circuit, 3 is a manual volume for video signal adjustment, 4 is an adjustment operator who adjusts the video signal, and 5 is a video signal generator for adjustment. 1 is a video signal for adjustment outputted to the video signal adjustment circuit 2; 6 is a video signal for adjustment monitor which the adjustment worker 4 observes from the video signal adjustment circuit 2; 7 is a manual volume 3 for adjustment by the adjustment worker 4.
The volume adjustment signal 8 is a voltage set by the mI manual volume 3, and the video signal adjustment circuit 2 and the video signal adjustment manual volume 3 constitute a descrambler 9.

The operation of the video signal adjustment method in such a configuration will be described below.

First, the adjustment video signal 5 is the video signal m! 1 circuit 2, and the obtained adjustment monitor video signal 6 is observed by an aim worker 4. The 0m adjustment worker 4 turns the adjustment volume 3 to make an appropriate adjustment and adjusts it to the optimum point. conduct.

In Figure 83, 11 is an adjustment video signal generator, 12
13 is a microcomputer circuit; 14 is a non-volatile memory; 15 is a D-M conversion circuit; 16 is a data signal generator for video adjustment;
17 is a video signal adjustment circuit, 17 is a monitor video signal detection device, 18 is an adjustment video signal output from the adjustment video signal generator 111 to the video signal adjustment circuit 16, and 19 is from the video adjustment data signal generator 12. Image iI output to the microcomputer circuit 13! The adjustment data signal 0 is the ma point data written from the microcomputer circuit 14 to the non-volatile memory 14 when a suitable adjustment is obtained, and the data signal 21 is the data signal for image adjustment 19 which is interpreted by the microcomputer circuit 13 and sent to the microcomputer circuit 14. A pulse signal 22 necessary for adjustment is output from the circuit 13 to the D-TM conversion circuit 15, and a pulse signal 22 is converted into an analog control signal by the D-TM conversion circuit 15 and output to the video-side GTM circuit 16 for adjustment. The required voltage 23 is adjusted in the video signal adjustment U path 16 using the voltage 22 based on the 1lII video signal 18, and is an adjusted monitor video signal output to the monitor video signal detection device 17. , 24 are detected from the adjustment monitor video signal 23 by the monitor video signal detection device 17, and are detected from the video adjustment data signal generation device 1.
2, and the microcomputer circuit 13, nonvolatile memory 14, D-me conversion circuit 15, and video signal adjustment circuit 16 are descrambled! 25.

The operation of the video signal adjustment method in such a configuration will be described below.

First, the video adjustment data signal 19 is sent from the video adjustment data signal generator 12 to the microcomputer circuit 13 using a bus line.
1 microcomputer circuit 13 decodes the video adjustment data signal 19 and outputs a pulse signal 21 necessary for video signal adjustment. The D-me conversion circuit 15 converts the pulse signal 21 into a voltage 22, and the video signal adjustment circuit 16 converts the pulse signal 21 into a voltage 22.
Output to. The video signal adjustment circuit 16 performs adjustment using the voltage 22 based on the adjustment video signal 18 inputted from the adjustment video signal generation device 11, and outputs the result to the monitor video signal detection device 17. . In the monitor video signal detection device 17, the adjusted monitor video signal 23 is inputted.
Detects adjustment errors and sends the results to the video adjustment data signal generator! Give feedback to 2. The video adjustment data signal generator 12 generates a video adjustment data signal 19 with adjustment errors corrected, and then performs subsequent adjustment.
When the appropriate adjustment point is reached, the result is sent to the microcomputer circuit 3.
The video signal can be adjusted by sending it to the nonvolatile memory 14 and storing it for descrambling.

Problems to be Solved by the Invention However, in the configuration as shown in FIG.
This has the problem of increasing the number of adjustment steps and costs. Furthermore, the configuration shown in FIG. 3 has a problem in that a specific bus line is required between the video adjustment data signal generator 12 and the microcomputer circuit 13.

In view of the above problems, the present invention provides a video signal adjustment method that eliminates the need for a specific bus line by directly using the addressing command control line of the microcomputer circuit of the descrambler for transmitting the video adjustment data signal. The purpose is to

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention inputs a video adjustment data signal from a video adjustment data signal generator to a microcomputer circuit of a descrambler, and uses the microcomputer circuit to process the video signal. The control data signal is decoded and the pulses necessary for video signal adjustment are output, the pulses are converted into analog control signals in the D-M conversion circuit, and the C voltage required for the obtained video signal IUI is used for video signal adjustment. The video signal for adjustment from the video signal generator for adjustment is adjusted to an appropriate value by inputting it to the circuit, and the adjustment error is detected by the video signal detection device for monitor from the video waveform after adjustment, and the result is used as described above. Feedback is fed back to the video adjustment data signal generator, which generates a video adjustment data signal that corrects adjustment errors, continues to make adjustments, and displays the result when an appropriate adjustment point is reached. In a video signal adjustment method in which the video signal can be adjusted by storing the data from the microcomputer circuit in a nonvolatile memory, the video adjustment data signal from the video adjustment data signal generator is modulated by an FSK modulation circuit; This modulated video m-board data signal is input to the descrambler by U transmission by sharing the line used for addressable control of the microcomputer circuit of the descrambler in use, and is input to the FBK in the descrambler. The video adjustment data signal demodulated by the demodulation circuit is input to the microcomputer circuit.

Effect: With the above-described configuration, the video adjustment data output from the video adjustment data signal generator is modified using the FSK modulation circuit before being input to the descrambler, and the modulated video adjustment data is The signal is input to the descrambler by RF transmission by sharing the line used for addressable control of the microcomputer circuit of the descrambler when in use, and then demodulated through the FSK demodulation circuit built into the descrambler for video adjustment. inputs data signals into the microcomputer circuit, sets the necessary adjustment points for video signal adjustment, and makes it possible to adjust the video signal. This eliminates the need for adjustment points on the production line, making it possible to improve the efficiency of setting adjustment points on the production line.

Embodiment Below, a video signal adjustment method in an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram illustrating a video signal adjustment method in an embodiment of the present invention. In FIG. 1, 31 is a video signal generator for adjustment, 32 is a data signal generator for video adjustment, 33 is an FSK modulation circuit, 34 is a demodulation circuit at F8, 35 is a microcomputer circuit, 36 is a nonvolatile memory, and 37 is a demodulation circuit. 38 is a video signal tone 111 circuit; 39 is a monitor scissor image signal detection circuit; 40 is an adjustment video signal output from the adjustment video signal generator 31 to the video signal adjustment circuit 38; The video adjustment data signal 42 is outputted from the video adjustment data signal generator 32 to the FSK modulation circuit 33. modulated video adjustment data signal, 43
is the modulated video adjustment data signal 4 in the FSK demodulation circuit 34.
2 is a video adjustment data signal that is demodulated and output to the microcomputer circuit 35, 44 is adjustment data that is written to the nonvolatile memory 36 when an appropriate adjustment point is obtained, and 45 is decoded by the microcomputer circuit 35 and sent to the microcomputer circuit. 35 to D
- A pulse signal necessary for m111 outputted to the human conversion circuit 37, 46 is a voltage necessary for adjustment which is converted into an analog control signal by the D-human conversion circuit 37 and output to the video signal adjustment circuit 38, 47 is an adjusted monitor video signal which is adjusted in the video signal adjustment circuit 38 based on the adjustment video signal 40 using the voltage 46 and output to the monitor video signal detection device 39; 48 is the monitor video signal This is adjustment error detection data detected by the slI monitor video signal 47 in the detection device and fed back to the video adjustment data signal generator 32.
The microcomputer circuit 35, nonvolatile memory 136, D-me conversion circuit 37, and video signal adjustment circuit 38 constitute a descrambler 49.

The operation of the video signal adjustment method in such a configuration will be described below.

First, the video adjustment data signal 41 from the video adjustment data signal generator 32 is modulated into F8 by the conversion circuit 33, and is transmitted through the RF low transmission using the line used for address signal pull control of the microcomputer circuit 35. Descrambling device 49
is input. On the descrambling device side, the demodulation circuit 34 demodulates the modulated video adjustment data signal 42 at F8, and inputs it to the microcomputer circuit 35, which causes the microcomputer circuit 13 to decode the video L-board data signal 43 and generate the signals necessary for video signal adjustment. outputs a pulse signal 45, and converts the D-me conversion circuit 3
7 converts the pulse signal 45 into an analog control signal and outputs the voltage 46 required for video signal adjustment to the video signal adjustment circuit 38. The video signal adjustment circuit 38 performs adjustment using the DC voltage 46 based on the adjustment video signal 40 input from the adjustment video signal generator 31 and outputs the result to the monitor video signal detection device 39. . In the monitor video signal detection device 39, the adjusted monitor video signal 47 is input.
Error detection of the Wl adjustment is performed from there, and the result is fed back to the video adjustment data signal generation device 32 using a connection cable. The video adjustment data signal generator 32 generates a video disc data signal 41 with adjustment errors corrected,
The adjustment is continued, and when the appropriate mm point is reached, the result is sent from the microcomputer circuit 35 to the nonvolatile memory 36 and stored, thereby making it possible to record the video signal.

As described above, according to this embodiment, the line used for address signal pull control of the microcomputer circuit of the descrambler in normal use is shared as is, and the video adjustment data signal modulated by the modulation circuit is sent to F8. By using low RF transmission, it is possible to transmit the video adjustment data signal to the descrambler without using a specific bus line as in the past, and it is possible to set the necessary adjustment points for video signal adjustment. It's easy to do.

Effects of the Invention As described above, according to the present invention, the line used for the addressable allocation part of the microcomputer circuit of the descrambler in normal use can be shared as it is, and the video 1iisi data modulated by the FSK modulation circuit can be used. By transmitting the signal at a low RF frequency, it becomes easy to set the necessary adjustment points for adjusting the video signal without using a specific bus line, and the adjustment point setting operation on the manufacturing line becomes more efficient.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining a video signal adjustment method according to an embodiment of the present invention, and FIG. tM2 and FIG. 3 are block diagrams for explaining conventional video signal adjustment methods, respectively. 31...mM video signal generator, 32--data signal generator for video adjustment, 33--modulation circuit at F8, 34
・-F8KyL@circuit, 35・-・Microcomputer circuit, 36
-Nonvolatile memory, 37-・D-person conversion circuit, 38-・
Video signal adjustment circuit, 39--Monitor video signal detection device, 40--Adjustment video signal, 41--Video adjustment data signal, 42--Modulated video adjustment data signal, 4
3.--Demodulated video m11 data signal, 45.
・Pulse signal, 46... ■Voltage, 47... Video signal for adjustment monitor, 48... Adjustment error detection data, 49...
... Descramble device.

Claims (1)

[Claims] 1. Input the video adjustment data signal from the video adjustment data signal generator to the microcomputer circuit of the descrambler, decode the video adjustment data signal in the microcomputer circuit, and output the pulses necessary for video signal adjustment. Then, the pulse is converted into an analog control signal in the D-A conversion circuit, and the DC voltage necessary for the obtained video signal adjustment is inputted to the video signal adjustment circuit to generate the adjustment video from the adjustment video signal generator. The signal is adjusted to an appropriate value, an adjustment error is detected from the adjusted video waveform by a monitor video signal detection device, and the result is fed back to the video adjustment data signal generation device to generate a video adjustment data signal. The device generates a video adjustment data signal that corrects adjustment errors, performs subsequent adjustments, and when an appropriate adjustment point is reached, the result is stored in the nonvolatile memory from the microcomputer circuit to adjust the video signal. A video signal adjustment method that enables
A line in which a video adjustment data signal from the video adjustment data signal generator is modulated by an FSK modulation circuit, and the modulated video adjustment data signal is used for addressable control of a microcomputer circuit of a descrambler when in use. A video signal adjustment method in which a data signal for video adjustment, which is input to the descrambler by RF transmission and demodulated by an FSK demodulation circuit in the descrambler, is input to the microcomputer circuit.