JPS58182378A - Synthesizer of television screen - Google Patents

Abstract

PURPOSE:To attain an inexpensive and small-sized device, without requiring an A/D converter and a high speed digital processor, by shifting the phase of horizontal and vertical synchronizing signals of each video signal, and synthesizing the screen by synthesizing the video signal while keeping it an analog signal as it is. CONSTITUTION:The phase of synchronizing signals H, V of the 1st video signal TV1 is shifted with phase shifters 3, 7 having positioners 5, 8 and the relation of position of a position 24 of a screen 23 and a screen 25 of the 2nd video signal is decided. The phase of the synchronizing signals is shifted in response to the shift of the postioner 5. A window signal WDW is transmitted from a window signal generating circuit 6 at the synchronizing signal and the size and shape of the screen 25 are decided. The synchronizing signals H, V are given to a phase shifter 7 and the position 26 is decided. The signals H, V shifted in phase at phase shifters 3, 7 are composed at a synchronizing signal generating circuit 9, a color burst signal is provided and the synchronizing signal of the 2nd video signal is generated. This synchronizing signal is given from an output terminal 12 to a camera 13, and the 2nd video signal TV2 is composed in coupling with the synchronizing circuit.

Description

[Detailed Description of the Invention] [Description of the Technical Field] The present invention relates to a screen composition device for fitting a part of one screen into another screen like a window, which is a device used for color television broadcasting. Regarding. In particular, it relates to a device that performs screen synthesis using an analog electronic circuit.

[Description of prior art]

BACKGROUND ART Conventionally, in color television broadcasting and the like, a technique of screen composition (suit-imposing) has been known in which one video screen is inlaid with another video screen to create a new video screen. In a simple conventional device, the two images to be synthesized are perfectly synchronized with each other, and any part of the screen to be fitted can be fitted at any position on the screen. I can't. or
A more advanced method involves digitizing the video signal, using a frame memory, and controlling the memory read process to obtain a complex composite screen image signal.

In the conventional method of digitally processing the Eirin signal in this way,
Since an analog-to-digital converter, a high-speed digital processing device, etc. are required, the device is expensive and large in size.

[Explanation of purpose]

The present invention completely improves this point, and allows screen composition to be performed by inserting the video GlI signal only by analog processing, or by freely changing the position of the video portion to be inserted, making the device inexpensive and An object of the present invention is to provide a superimpose control device that can be downsized.

[Summary of the invention]

The present invention provides a TV that insets a part of a second Eirin screen according to a second Eirin signal into a part of the first Eirin screen according to the first Eirin signal, thereby creating an Eirin signal representing one new screen. In the John screen compositing device, the first image 111
r, a means for extracting a horizontal synchronization signal and a vertical synchronization signal from the first Eirin signal, and a means for changing the phase of the horizontal synchronization signal and vertical synchronization signal according to manual operation. Movie gI! A first phase shifter that determines the position where the second Eirin screen is fitted onto the screen, and a second phase shifter that receives the horizontal synchronization signal and vertical synchronization signal obtained from the output of this first phase shifter as inputs. A window signal generation circuit that generates a window signal that determines the shape and size of the Eirin screen, and a phase shift of the horizontal synchronization signal and vertical synchronization signal obtained from the output of the first phase shifter according to full manual operation. A second phase shifter that determines the position of the second video screen to be fitted into the first video screen, and a horizontal synchronization signal and a vertical synchronization signal obtained from the output of the second phase shifter are combined. means for adding all the color burst signals of said first Eirin signal to said means, a synchronization signal output terminal for supplying the output signal of said means as a synchronization signal of said second Eirin signal, and an input terminal of said second Eirin signal. and a switching circuit that has one switching terminal connected to the first Eirin signal, the other switching terminal connected to the second Eirin signal, and controls the switching timing by the window signal. do.

Further, it is preferable that the second video signal is generated from a television camera or other video signal generating device controlled by the output of the synchronization signal output terminal.

Further, it is preferable that the second video signal is a signal that has passed through a frame synchronizer that is synchronously controlled by the output of the synchronization signal output terminal.

In addition, the first phase shifter and the second phase shifter each have two potentiometers that control the amount of phase shift, and each has a positioner that moves in accordance with the position of one handle in the X direction and the Y direction. It is preferable to include.

In addition, a part of the second Eirin screen based on the second video signal is inserted into a part of the first Eirin screen based on the first Ei*@ issue of the present invention Fi, and a Eirin signal representing one new screen is created. The television screen composition device h includes an input terminal for the first video signal, a means for extracting a horizontal synchronization signal and a vertical synchronization signal from the first video signal, and a means for extracting a horizontal synchronization signal and a vertical synchronization signal from the first video signal; a first phase shifter that determines the position at which the second Eiron screen is fitted onto the first Eiron screen by shifting the phase of the synchronization signal in accordance with manual operation; A window signal generation circuit generates a window signal that determines the shape and size of the second film screen, into which the horizontal synchronization signal and vertical synchronization signal obtained as the output are inserted, and the output of the first phase shifter is a second phase shifter that determines the quality of the second film screen fitted into the first film screen by shifting the phase of the horizontal synchronization signal and the vertical synchronization signal according to the full manual operation; Means for generating a synchronizing signal t which is a complete combination of the horizontal synchronizing signal and the vertical synchronizing signal obtained at the output of the phase shifter or synchronously coupled thereto, and supplying the output signal of this means as the synchronizing signal of the Queen's second video signal. an input terminal for the second Eirin signal, a circuit to which the second EigI signal is applied and generates a color burst of the second Eirin signal, an output terminal of this circuit and an input terminal for the second Eirin signal; a demodulation circuit that is given a second Eirin signal and demodulates the color signal of the second EigI signal; A modulation circuit that sends out the second video signal modulated by the color signal tube in bursts, the output of the modulation circuit is connected to one switching terminal, the second video signal is connected to the other switching terminal, and the second video signal is connected to the window. The present invention is characterized in that it includes a switching circuit that controls switching timing using a signal.

[Explanation of Examples]

An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram of main parts of an embodiment of the first invention. The first video signal TV, which creates the basic video signal on the composite screen, is led from the input terminal 1 to the synchronization separation circuit 2. The horizontal synchronizing signal (2) and the vertical synchronizing signal V output from the synchronizing separation circuit 2 are guided to a first phase shifter 3. The phase shifter 3 is equipped with a positioner 5 in which a potentiometer 211 moves in accordance with the position fK of one handle in the X and Y directions. The output of this phase shifter 3 is led to a window signal generation circuit 6 and a phase shifter 7, respectively. This phase shifter 7 is equipped with a positioner 8 in which two potentiometers move in accordance with the positions of one handle in the X and Y directions.

The output of this phase shifter 7 is guided to a synchronizing signal generating circuit 9. In addition, 11 in FIG. 1 is a first-stroke addition circuit, and its input terminal is connected to the TV output from the synchronous separation circuit 2.
A subcarrier SC and a burst flag BF that are in phase with the burst signal of , are derived. The output of this burst addition circuit 11 is led to a synchronization signal generation circuit 9. The output of this synchronization signal generation circuit 9 is transmitted through the synchronization signal output terminal 12 to the television camera 1 which sends out the second video signal 'rv2f.
It is led to the synchronous coupling input terminal of 3. The video signal Tv2 from the television camera 13 is guided to a phase adjustment circuit 15 through an input terminal 14. The output of this phase adjustment circuit 15 is led to one terminal of a switching circuit 16. The other terminal of this switching circuit 16 is connected to the first video signal TV.

is being guided. This switching circuit 16 is composed of an electronic switching circuit capable of high-speed switching.

Further, the positioners 5 and 8 are provided with short rod-shaped sticks 21. This stick adder 21 is guided to the rotation axis of each potentiometer that detects movement components in the X and Y directions according to manual operation of the stick and converts them into changes in electrical signals in one direction and the Y direction. It is configured as follows.

Regarding this positioner, for example,
Learn more about No. 147987 "Positioner". Figure 1 TV,
~〒V is a cover for connecting a CRT for monitoring.

The characteristic operation of the present invention having such a circuit configuration will be explained. The first video signal TV is the video signal that is created by the video signal that is the basis of the composite video screen. A horizontal synchronization signal H and a vertical synchronization signal V are extracted from this first video signal TV by a synchronization separation circuit 2. This horizontal synchronization signal E
The phase of the vertical synchronizing signal V is shifted by phase shifters 3 and 7 provided with positioners 5 and 8. From this K, as shown in Figs. 2 and 3, the position 24 to be fitted on the video screen n by the first Eirin signal is the position 2 to be fitted on the video screen δ by the second Eirin signal. The images are combined and the positional relationship is determined.

That is, the adjuster looks at a monitor screen in an adjustment room or the like, operates the stick 20 of the Nakara positioner 5, and determines the position where a part of the Eirin screen section is to be fitted into the Eirin screen 23. In response to the movement of the potentiometer 5, an electrical signal is output from the potentiometer. Accordingly, the phases of the horizontal synchronization signal H and the vertical synchronization signal V are shifted. The shifted horizontal periodic signal H and vertical synchronizing signal V are given to the window signal generating circuit 6, and from the window signal generating circuit 6 Fi is shown in FIG. 4(a).
A window signal WDW shown in is sent out. This window signal WDW
), the shape and size of the Eirin screen δ to be fitted into the Eirin screen path are determined. This window signal WDWij Fig. 4 (
A wide variety of types can be generated as shown in 1)) and (C), and the sizes can be determined in various ways.

The horizontal synchronizing signal (2) and the vertical synchronizing signal (V) are applied to the phase shifter 7, and the position of the video screen U into which the video screen '23KFi is inserted is determined. That is, when the adjuster determines the position 26 on the screen using the positioner 8 while looking at the monitor screen, the phases of the horizontal synchronizing signal (2) and the vertical synchronizing signal (V) are shifted in accordance with this output.

The horizontal synchronization signal ■ and the vertical synchronization signal V whose phases have been shifted by the phase shifters 3 and 7 are combined in the synchronization signal generation circuit 9, and a color burst signal is added to the synchronization signal of the second Eirin signal. generated.

This synchronization signal is applied to the television camera 13 through the synchronization signal output terminal 12 and coupled to the synchronization circuit of the television camera 13. By this synchronization signal, the second Eirin signal T
v2 is combined.

Further, if the color phase differs between al and a2 of the switching circuit 16 due to a delay due to cable length, etc., the phase adjustment circuit 15 can adjust the color phase. Note that this phase adjustment may be performed at a stage in the subcarrier of the synchronization separation circuit 2 or in the synchronization signal generation circuit 9.

This second video signal TV2 is the first video signal TV.

The K combining operation is performed by the switching circuit 16. In other words, the switching circuit 16 is always the first Eirin signal TV.

is connected to the switching terminal at II so as to transmit.

In this state, when the first video signal TV reaches a portion corresponding to 1124 (FIG. 2) K above the video screen, the window signal WDW connects the switching circuit 16 to the switching terminal a2 side. From this point, a window having a shape determined by the window signal WDW is often removed from the first video signal TV to the extent that it is inserted into the window.

Every time the switching circuit 16 is connected to the switching terminal a29K, the second video signal Tv2 from the input terminal 14 is combined with the first video signal TV. At this time, the second video signal Tv
The second synchronization signal has a phase shifted by the phase shifted by the phase shifter 7 with respect to the same tiA signal of the first Eirin signal. Therefore, the video signals at the inset position 26 (FIG. 3) of the Eirin screen 5 are sequentially combined with the first video signal TV,
A composite film screen as shown in Figure 2 is obtained.

FIG. 5 is a block diagram of main parts of the second invention. This second invention is the TV camera 13! This is suitable for flat color television cameras and cases where color lock is not possible.

The second video signal Tv2 from the television camera 13 passes through the input terminal 14t- and is guided to the subcarrier generation circuit O. Further, the input terminal 14 is led to a separation circuit 31 that separates the color signal and the luminance signal. The output of a subcarrier generation circuit that generates subcarriers locked to the color burst of TV 2 is led to a color signal demodulation circuit 32. The output of this color signal demodulation circuit is led to a color signal modulation circuit. The subcarrier SC of the synchronization signal generation circuit 9 is guided to this color signal modulation circuit.

If this color signal modulation circuit's output is bright in the synthesis circuit story
It is combined with the signal No. m, returned to a composite signal, and guided to the switching circuit 16. In addition, from this circuit, the burst addition circuit 1i
e-It may be omitted.

Other points are similar to the first invention shown in FIG.

In such a circuit configuration, the synchronization signal of the television camera 13 is combined with the horizontal synchronization signal H from the synchronization signal output terminal 12, the vertical synchronization signal VK, and the locked synchronization signal KP period. The color signal of this second Eirin signal TEv2 is demodulated by the color signal demodulation circuit section using the subcarrier locked to the color burst signal of TEV generated by the subcarrier generation circuit. The signal is
The color signal modulation circuit separately modulates the subcarriers locked to the color burst signal of the first video signal TV.

FIG. 6 is a circuit configuration diagram of a main part of a second embodiment common to the first invention and the second invention.

This embodiment is applied when the second video signal TV2 is obtained from something other than a television camera. That is, the second video signal TV2 is input to a frame synchronizer controlled by a synchronization signal from the synchronization signal output terminal 12. As a result, the frame synchronizer Akara sends out an Eirin signal synchronized with the synchronization signal.

[Explanation of effects]

As explained above, according to the present invention, the television screen is synthesized by shifting the phase of the horizontal synchronization signal and vertical synchronization signal of each video fII signal to synthesize the video signal as an analog signal.

Therefore, there is no need for an analog-to-digital converter or a high-speed digital processing device, and the device can be made significantly cheaper and more compact. Moreover, this device has the advantage of being able to be mounted on a relay van or portable device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of the first invention. Figures 2 and 3 are diagrams showing Eirin screens. FIG. 4 is a diagram showing a window signal. FIG. 5 is a block diagram of the main parts of the second invention. FIG. 6 is a block diagram of main parts of another embodiment. 1.14--input terminal, 2... synchronous separation circuit, 3.
9... Phase shifter, 5.8... Positioner, 6... Window signal generation circuit, 9... Synchronization signal generation circuit, 11...
Burst addition circuit, 12... Synchronization signal output terminal, 15
...Phase adjustment circuit, 16...Switching circuit, feather...Color signal demodulation circuit,...Subcarrier generation circuit,...Color signal modulation circuit, 35...Frame synchronizer. Patent applicant Tomoei Co., Ltd. Agent Patent attorney Takashi De Nao

Claims (5)

[Claims] (1) A television screen where a part of the second video screen based on the second video signal is inserted into a part of the first video screen based on the first video signal to create a video signal representing one new screen. The synthesis device includes an input terminal for the first video signal, a means for extracting a horizontal synchronization signal and a vertical synchronization signal from the first video signal, and a means for manually adjusting the phases of the horizontal synchronization signal and the vertical synchronization signal. a first phase shifter that determines the position at which the second Eirin screen is fitted onto the first Eirin screen; and a horizontal synchronization signal and vertical synchronization obtained from the output of the first phase shifter. A window signal generation circuit that generates a window signal that determines the shape and size t of the second Eirin screen into which the signal is inserted, and the phase of the horizontal synchronization signal and vertical synchronization signal obtained at the output of the first phase shifter. a second phase shifter that determines the position fIt of the second video screen that is shifted according to manual operation and fitted into the first video screen; and a horizontal synchronization obtained at the output of the second phase shifter. means for synthesizing the signal and the vertical synchronization signal and adding thereto a color burst signal of the first video signal; a synchronization signal output terminal for supplying the output signal of this means as a synchronization signal of the second video signal; A switching circuit in which the input terminal for the second Eirin signal is connected to the first video signal to one switching terminal, the second Eirin signal is connected to the other switching terminal, and the switching timing is controlled by the window signal. A television screen composition device comprising: (2) The television screen composition apparatus according to claim (1), wherein the second video signal is generated from one television camera controlled by the output of the synchronization signal output terminal. (3) The television single frame synthesizing device according to claim (1), wherein the second video signal is a signal passed through a frame synchronizer controlled by the output of the synchronization signal output terminal. (4) The first phase shifter and the second phase shifter each have 92 potentiometers that control the amount of phase shift and move in accordance with the position of one handle in the X and Y directions. A televised run screen composition apparatus according to claim (1), which includes a positioner. (5) A television screen in which a part of the first video screen based on the first video signal and a part of the second video screen based on the second video signal are inserted to create a complete video signal representing one new screen. The synthesis device includes an input terminal for the first video signal, a means for extracting a horizontal synchronization signal and a vertical synchronization signal from the first video signal, and a means for manually adjusting the phases of the horizontal synchronization signal and the vertical synchronization signal. a first phase shifter that determines the position at which the second Eirin screen is fitted onto the first Eirin screen; and a horizontal synchronization signal and vertical synchronization obtained from the output of the first phase shifter. a window signal generation circuit that generates a window signal that determines the shape and size of the second video screen into which the signal is inserted; and the phase of the horizontal synchronization signal and vertical synchronization signal obtained at the output of the first phase shifter. A second phase shifter that completely determines the position of the second image plane that changes according to manual operation and is inserted into the first image plane, and a horizontal phase that is obtained from the output of this second phase shifter. means for synthesizing a synchronization signal and a vertical synchronization signal; a synchronization signal output terminal for supplying an output signal of the means as a synchronization signal for the second video gI signal; an input terminal for the second video signal; A subcarrier ta is given a second video signal and is locked to the color burst of this second video signal.
a demodulation circuit which receives the output of this circuit and the second video signal and demodulates the color signal of the second Eirin signal; and a synchronization signal between the output of this demodulation circuit and the first Eirin signal. and a modulation circuit that modulates the force 2 signal with the color burst of the first Eirin signal and sends out the second Eirin signal, and one switching terminal is connected to the output of the modulation circuit, and the other switching terminal is connected to the output of the modulation circuit. A television screen composition device comprising: a switching circuit to which the second video signal is connected to a terminal and controls switching timing using the window signal.