JP3108240B2 - VTR device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a basic image for tuning,
The present invention relates to a VTR device having a function of outputting to a receiver via an RF converter.

[0002]

2. Description of the Related Art The main television system is NTS.
There are a C system, a PAL system, and a SECAM system. NTSC
The method is adopted in Japan, the United States, Canada, etc., the PAL method is adopted in Europe, and the SECAM method is adopted in communist areas and France. In each of these methods, the frame frequency (how many pictures are used per second), the number of scanning lines per frame, and the color conversion method are different. The PAL method is most often used worldwide. In addition, PAL (Phase Alternatio)
The n Line) method is a method in which the phase of one of two color signals is inverted for each scanning line, transmitted, and combined with a signal delayed by one scanning line on the receiving side, so that hue distortion received on a transmission path is obtained. To cancel each other out. Further, such a difference in the television system naturally applies to a VTR device. For example, in order to reproduce a video on a PAL system TV receiver, a PAL system VTR must be used. Must be used.

[0003] The signal system of a VTR device is as follows. In the case of receiving a TV broadcast, via a tuner, and for an external signal of a video camera or the like, directly from a video input terminal and an audio input terminal.
It is input to the signal recording system. In a signal recording system, a video signal is separated and recorded into a luminance signal and a chrominance signal, and at the same time, an audio signal is also recorded. Then, in the case of reproducing on an AV monitor (TV that separates video and audio), the recorded video signal and audio signal are output from the video and audio output terminals. When a TV receiver is used as a monitor, an RF converter is used, and the recorded video signal and audio signal are converted into broadcast waves and supplied to a TV antenna terminal.

Therefore, the TV receiver needs to perform an operation for tuning to the frequency of the broadcast wave supplied from the VTR device. In this case, in Japan using NTSC, VT
As a dedicated channel for receiving signals from the R device, 1
Since the channel or two channels are defined, and the manufacturer sets the transmission frequency of the VTR device at the time of shipment, such tuning operation is not particularly necessary.

[0005]

SUMMARY OF THE INVENTION However, NTS
For TV receivers that use a PAL system other than the C system, the channel for receiving signals from the VTR device is undefined, so when you purchase a VTR device,
Synchronization with the TV receiver has to be performed. Therefore, conventionally, such a VTR apparatus has previously provided a basic video signal (for example,
A video signal that has a black background and two white vertical lines near the center and is displayed at an interval) is prepared. Then, the user must turn on a slide switch or the like to output the basic video signal from the RF converter to the TV receiver to perform a tuning operation. Then, while watching the image projected on the screen of the TV receiver, when the image is clearly projected, the slide switch or the like is turned off to stop the output of the basic image signal from the RF converter.

In order to adopt the above adjustment method, T
A slide switch for outputting a basic video signal to the V receiver must be provided in the VTR device.
In addition, a troublesome on / off operation of the switch cannot be avoided. In addition, a dedicated IC and an oscillating element for creating a basic video signal must be provided in the RF converter.

[0007] The present invention has been made in view of the above situation, and a VTR device capable of automatically creating a basic image and outputting the image to a TV receiver simply by turning on the power at the start of use. It is intended to provide.

[0008]

In order to achieve the above object, the present invention provides a VTR for outputting a video to a receiver via an RF converter and synchronizing the video output with the receiver to reproduce a video. In the apparatus, a flag means having a flag set to off as an initial value, a basic image creating means for creating a basic image for performing synchronization, and only when the flag is off, the basic image creating means Instruction means for instructing to create a basic image, basic image output means for outputting the created basic image to a receiver only when the flag is off, and the basic image using a receiver And setting means for setting the flag to ON when receiving an input indicating that the adjustment has been completed.

[0009]

According to the above arrangement, the VTR device outputs a video to the receiver via the RF converter, and synchronizes the video output with the receiver to reproduce the video. Further, a flag is provided which is inverted when the first adjustment using the receiver is completed. And
At the time when the VTR device is purchased, the flag is set in a state where it is not inverted. Then, V
When the use of the TR device is started, since the flag is not inverted, the instructing unit instructs the basic image creating unit to create a basic image for performing tuning. Further, in accordance with this instruction, the basic image creating means creates a basic image. Subsequently, the created basic video is output to the receiver by the basic video output means. Then, the tuning ends when the basic video is reproduced on the receiver.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration for outputting a basic video in a VTR device according to the present invention. The VTR device 1 (surrounded by a broken line) includes an on-screen IC 2 for creating a basic image, a microcomputer 3 for instructing the on-screen IC 2 to create a basic image, and an output of the basic image created by the on-screen IC 2. And a video circuit 4 for adjusting the RF signal for converting the created basic video into a broadcast wave and outputting the broadcast wave to the receiver 10.
A converter 5 and a button 6 provided to notify the microcomputer 3 of the completion of the tuning after performing a tuning operation while watching the basic video projected on the screen of the receiver 10 are provided.

As the on-screen IC 2, an on-screen IC used for recording reservation and time setting is used. There are two operation modes, an external synchronization mode and an internal synchronization mode. In the external synchronization mode, a video signal input to the on-screen IC 2 is output to the video circuit 4 as it is in response to a “display off” instruction from the microcomputer 3. In addition, in response to an instruction of “display on” from the microcomputer 3, a character (character) is superimposed on a video signal input to the on-screen IC 2 and output.

On the other hand, in the internal synchronization mode, the instruction of "display off" from the microcomputer 3 causes
The video signal input to the on-screen IC 2 is cut off, and only the blue-back image video signal generated by the on-screen IC 2 is output to the video circuit 4. Also, in response to an instruction of “display on” from the microcomputer 3, the video signal input to the on-screen IC 2 is cut off, and a character (character) is superimposed on the video signal of the blue-back image created by the on-screen IC 2. Output.

The button 6 may be provided with a dedicated button, may also be used as a setting end button used for recording reservation and time setting, or the button input may be a remote control input. . FIG. 2 is a schematic diagram showing a basic image displayed on the receiver screen. A test pattern (usually a blue-back image) is displayed over 12 lines in a predetermined rectangular area on the inner side of the TV screen. The contents of the pattern are not particularly limited, but, as shown in the figure, in addition to a frame-like display for displaying a rectangular predetermined area, "TEST PATTERN" is displayed in the center in the horizontal direction. May be.

FIG. 3 is a flowchart showing the control for outputting the basic video. The output of the tuning test pattern is performed when a VTR device is purchased, connected to a TV receiver, and reproduction is started. Shows control. The microcomputer 3 first checks whether or not the test pattern end bit is 1 (S1). In this case, the test pattern end bit is transmitted from the VTR device 1 to the receiver 10
Test pattern (that of the basic image) is output to the tuning Misao
This is set to "1" when the operation is completed , set to "0" when the test pattern has not been output yet, and set to "0" at the time of shipment.

Therefore, when it is confirmed that the test pattern end bit is not 1 (No in S1)
Then, it is confirmed whether or not the VTR device 1 is in the POWER ON state (S2). And POWER
When it is confirmed that the state is the R.ON state (Yes in S2), the on-screen IC2 (displayed as OSD-IC in the flowchart) is displayed on the first to twelfth lines of the blue screen image. The character code of the test pattern to be displayed on the line is transferred (S3). Subsequently, the "internal synchronization mode (see the description in FIG. 1)" is instructed to the on-screen IC 2 (S4). Further, an instruction to turn on the character display (see the description in FIG. 1) is given to the on-screen IC 2 (S5). Next, the on-screen IC 2 receiving the instruction from the microcomputer 3 creates a tuning test pattern (S6), and sends the created test pattern to the receiver 10 through the video circuit 4 and the RF converter 5. Output (S7).

At this stage, since the test pattern is projected on the screen of the receiver 10, the tuning operation is performed while watching the test pattern. When the test pattern is clearly projected on the screen, The button 6 is pressed to notify the microcomputer 3 of the completion of tuning (that is, input of the OK key). Therefore, when the input of the OK key is confirmed (Yes in S8), the test pattern end bit is set to 1 (S8).
9).

When the test pattern end bit is set to 1 (Yes in S1) or when V
When the TR device 1 is in the POWER-OFF state, that is, when the power outlet is simply inserted (No in S2), the microcomputer 3 sends the on-screen IC 2 An instruction of "external synchronization mode (see description in FIG. 1)" is issued (S10), and further, an instruction of "character display off (see description in FIG. 1)" is issued (S11). Therefore, a test pattern is not created and is not output to the receiver 10. Then, the video signal input to the on-screen IC 2 is output to the video circuit 4 as it is.

[0018]

According to the present invention described above, when purchasing a VTR device and starting to use the VTR device, the basic image necessary for synchronizing the video signal with the receiver is transmitted to the receiver. There is no need for a switch operation to output. That is, when the user plugs in the power outlet of the VTR device and turns on the power, the basic image is automatically output to the receiver. Therefore, it is not necessary to provide a slide switch or the like for outputting a basic image in the VTR device, and there is no need to perform a troublesome switch operation, thereby greatly improving the usability.

Further, since a basic image can be created using an on-screen IC currently in use, it is necessary to provide a dedicated IC and an oscillating element for creating a basic image in an RF converter as in the prior art. Is eliminated, the number of parts is reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration for outputting a basic video in a VTR device according to the present invention.

FIG. 2 is a schematic diagram showing a basic image displayed on a receiver screen.

FIG. 3 is a flowchart illustrating control for outputting a basic image.

[Description of Signs] 1 VTR device 2 On-screen IC 3 Microcomputer 4 Video circuit 5 RF converter 6 Button 10 Receiver

Claims (1)

(57) [Claims] 1. A performs video output to receiver through the RF converter comprises Oite the VTR apparatus performing the reproduction of the video by tuning the video output receiver, a flag is set to OFF as the initial value Flag hand
Step, basic image generating means for generating a basic image for performing synchronization, instruction means for instructing the basic image generating means to generate a basic image only when the flag is off, and the flag Only when is turned off, the basic video output means for outputting the created basic video to the receiver, and the effect that the adjustment by the basic video using the receiver has been completed.
Is set to turn on the flag when an
VTR apparatus characterized by comprising a constant section.