JPS61105190A - Character multiplex broadcasting video monitor system - Google Patents

Abstract

PURPOSE:To realize simultaneous video monitoring of multiple programs using one monitor without preparing video monitors for the number of broadcasting programs by displaying multiple character multiplex broadcasting images separately on the screen of one monitor. CONSTITUTION:When the program 1 is received through the input terminal (a), the information to inform the program 1 is output to the signal line group (c) through operation of the character multiplex broadcasting receiver 1, and the memory writing controller 2 receives the said information, compares and collates it with the information input from the keyboard 3, and instructs the memory address controller 5 via the signal line (k) to write in the portion A. At the same time it gives memory writing permission to the memory 4 via the signal line (e). Then when the input signal to be added to the input terminal (a) becomes program 2, the display information of the program 2 is written in the memory area of the memory 4 equivalent to the potion B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a broadcast video monitoring system for teletext broadcasting.

[Conventional technology]

Conventionally, according to this type of monitoring, only one teletext screen could be displayed on one monitoring device;
It was customary for one television channel to broadcast multiple programs at the same time.

[Problem that the invention seeks to solve]

Therefore, in order to monitor these programs simultaneously, there is a drawback that a number of monitoring devices equal to the number of broadcast programs is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a teletext video monitoring system that allows multiple programs to be monitored simultaneously using one monitor.

[Means for solving problems]

The present invention provides teletext monitoring that displays a teletext signal obtained by superimposing digitized image information on a television video signal in an arbitrary horizontal scanning period of the vertical blanking period as an image on a cathode ray display screen. In this method, the video monitoring screen is divided horizontally and vertically, the received teletext broadcasting video is reduced to the size of one divided screen formed by the division, and the received teletext broadcasting screen is divided into the divided screens. This is a teletext video monitoring system that is characterized by displaying images sequentially at the top.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention, and FIG. 2 shows an example of a video screen displayed by this embodiment.

Referring to FIG. 1, the present invention comprises a teletext broadcast video input terminal a, a teletext broadcast receiving section 1, a memory write control section 2, a memory section 4, a memory address control section 5, and a display control section 6. , a timing signal generator 7 , and a cathode ray display tube 8 . A teletext video signal is input to an input terminal a of the teletext receiver 1 . The receiving unit 1 discriminates the teletext signal from among the video signals, further generates display information and page update control information based on the image information and control information included in the teletext signal, and outputs the signal line group. Display information is output to output signal line group C, and update control information is output to output signal line group C.

The memory write control unit 2 stores in advance a plurality of program numbers to be monitored generated by human operation of the keyboard 3 through the signal line group d, and updates inputted through the signal line 9 group C. The control information is compared with the stored program number, and if a match is detected, a write permission signal is output to the memory section 4 through the signal line e. It also outputs location designation information on the split screen through the signal line group k.

The memory unit 4 has a memory for one video screen, and upon receiving the write permission signal, receives the teletext broadcasting on the address of the memory specified by the write address signal group f output from the memory address control unit 5. The display information emitted from unit 1 via the signal line group is written.

The memory address control unit 5 generates the write address information and the memory read address signal based on the location designation information input through the signal line group k and the timing signal group input through the signal line group k. , are alternately switched and outputted to the signal line group f at the necessary timing. Further, the memory address control unit 5 outputs a control signal to the memory 4 via the signal line group f to instruct memory writing and reading in accordance with the timing described above. The memory section 4 includes:
When the write/read switching control signal input via the signal line group f enters the read state, the output signal line group g
, the information stored at the memory address designated by the signal line group f is output.

This readout operation is performed in synchronization with the telepinoy scan, and the readout address is switched from beginning to end.

The display control unit 6 controls the brightness control signal of the cathode ray display tube 8, horizontal and vertical scanning control signals, and cathode ray display information using the display information input through the signal line group g and the timing signal group input through the signal line group i. An accelerating voltage focus control signal is generated to drive the cathode ray display tube 8. The cathode ray display tube 8 displays an image on a fluorescent surface under the drive control. Timing signal generator 7 generates necessary timing and outputs it to memory address controller 5 and display controller 6 via signal line groups i and h, respectively.

In the above configuration, when an input is made from the keyboard 3 to the memory write control unit 2 to monitor programs 1, 2, . . . 9, each received image is
...and engineering. Now, when program 1 is received through input terminal a, information notifying program 1 is output to signal line group C by the operation of teletext receiving section 1. The memory write control unit 2 receives the information and transfers it to the keyboard 3.
It compares and verifies the information inputted from the above, and instructs the memory address control section 5 to write to the part A in FIG. 2 via the signal line group k. At the same time, for the memory section 4,
Instructs memory write permission via signal line e. The memory address control section 5 outputs address information of the area corresponding to part A in FIG. 2 to the memory section 4 based on the information from the memory write control section. The display information of program 1 is written in the area corresponding to part A in Figure 2 based on .Next, when the input signal applied to input terminal a becomes program 2, the display information of program 2 is written as shown in Figure 2. Similarly, each image information of programs 3, . are written to the respective memory areas.

These written data are read out in synchronization with the scanning of the television as information for one screen of the television, are connected to the display control unit 6 via the signal line group g, and are displayed on the fluorescent surface of the cathode ray display tube 8. The divided images are displayed in row 1 column in FIG.

In the above embodiment, the case of 9-split screen has been described, but any other split screen can be displayed.

〔Effect of the invention〕

As explained above, the present invention is configured to divide and display a plurality of teletext broadcasting images on one monitor screen, so that one monitor screen can be used without the need to prepare video monitoring devices for the number of broadcast programs. This has the effect that images of multiple programs can be monitored simultaneously using a monitor.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention in functional blocks, and FIG. 2 shows an example of a display screen of this embodiment. a...Teletext broadcasting video signal input terminal, 1...Teletext broadcasting receiving section, 2...Memory writing control section, 3.
... Keyboard, 4... Memory section, 5... Memory address control section, 6... Display control section, 7... Timing signal generation section, 8... Cathode ray display tube, b, c,...・・・
k...The connection between each functional block is a signal line group, A, B,
C. D, E, F, G, H, I . . . split screen, A indicates an image of program 1, B indicates an image of program 2, C indicates an image of program 3, and so on.

Claims (1)

[Claims] (1) Teletext broadcasting video in which a teletext signal in which digitized image information is superimposed on a television video signal during an arbitrary horizontal scanning period of the vertical blanking period is displayed as an image on a cathode ray display screen. In the monitoring method, the video screen is divided in the horizontal and vertical directions, the received teletext video is reduced to the size of one divided plane formed by the division, and the received teletext screen is divided into the A teletext video monitoring system characterized by displaying images side by side on a split screen.