JPS61258584A - Tv receiver - Google Patents

Abstract

PURPOSE:To allow a favorite image of TV to frame up as a still picture while a viewer watching a moving picture on TV by storing digitalized sampling TV signals in plural areas of image memories and displaying the still pictures simultaneously together with a moving picture after reading the above TV signals at a time. CONSTITUTION:If multi-faceplate displaying switches 15 are pressed, demodulated video signals A are converted into digital signals E by an A/D converter 7 and are written in areas i of image memories 8 from field to field on the basis of horizontal-vertical synchronous signals D. Then after video signals F read from the image memories 8 are converted to analog signals G by a D/A converter 9, portions i on the TV faceplates are displayed on the braun tube 14 as the moving pictures. In such a case, if a switch 16 for framing up the pictures is pressed, an address among areas a-h is given from memory control circuits 11 to the image memories 8 at one field distance. Thus whenever the switch 16 is pressed, the images appeared in a moment are stored in the areas a-h of the image memories 8 in order and whenever each field is read out, its images are displayed on the braun tube 14 as the still pictures.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention divides the screen of a television receiver into a plurality of sections, inserts an image reduced to that size into each section, and displays the plurality of images at the same time. The present invention relates to a television receiver configured to do so.

[Conventional technology]

Generally, in a television receiver, it is sometimes desired to simultaneously display a plurality of famous TV programs or VTR programs on the television screen. However, there has never been a television receiver that can accomplish this.

[Problem to be solved by the invention]

Conventionally, when a viewer wants to display multiple scenes that they want to see at the same time, they capture the video with a camera,
One possible method to achieve this is to collect the photos and record and play them back with a video camera, but this requires extremely complicated operations.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a television receiver that can provide the above-mentioned functions very easily.

[Failure to solve the problem]

The television receiver according to the present invention includes an A/D converter,
It is equipped with a video memory having a plurality of areas and a D/A converter, which digitizes and samples the video of the moment that the viewer likes from the video on the television screen, and stores one image in each area of the video memory in turn. The entire video memory is read out in one field or one frame time, and multiple still images in the video memory are displayed simultaneously. is displayed.

[Effect]

In this invention, digitized and sampled television signals are stored in multiple areas of the video memory and read out at once to display still images together with one moving image, so viewers can watch the video while watching the video. You can display your favorite image as a still image.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
FIG. 2 is a diagram showing the overall configuration of a television receiver according to an embodiment of the present invention, and FIG. 2 is a diagram showing a storage area of a video memory in this embodiment. It also shows the TV screen that was taken.

In FIG. 1, 30 is an antenna, 1 is a tuner, 2 is a video demodulation amplifier circuit, 3 is a switch, 4 is a video output circuit,
5 is a synchronous separation circuit, 6 is a deflection circuit, 14 is a cathode ray tube,
13 is a deflection yoke, and up to this point it has the same general configuration as a conventional television receiver.

On the other hand, the area indicated by the broken line is the circuit part according to the present invention, and 7 is the A/C circuit that converts the television signal into a digital signal.
A D converter; 8 is a video memory having N areas for storing the output of the A/D converter 7; 9 is a D/A converter that converts the signal read from the video memory 8; 15 is a D/A converter; A switch for performing a multi-screen display operation; 10 is a flip-flop to which a signal from the switch 15 is manually input; 16;
1) is a still image embedding switch for embedding the moving image in area i into area a to h in multi-screen display operation; 1) is the A/
This is a memory control circuit for sampling the digitized television signal from the D converter 7 on the horizontal and vertical time axes and writing it into any of the N areas of the video memory 8. It also performs control to simultaneously read out television signals written in 1 field or j frame times. Further, 41 is a reference oscillator for a clock used in the operation of the memory control circuit 1).

Next, the operation will be explained.

In FIG. 1, a television signal received by an antenna 30 has a desired channel selected by a tuner 1, and is guided to a video demodulation and amplification circuit 2. The demodulated video signal A is also supplied to a synchronization separation circuit 5 1 , and its output horizontal and vertical synchronization signals are guided to a deflection circuit 6 to generate a sawtooth wave current for driving a deflection yoke 13 . As a result, television images are displayed on the cathode ray tube 14.

In this embodiment, a video memory 8 is provided, and as described in 1. Area a has nine areas a − as shown in Figure 2.
It is divided into i. In this video memory 8, one field has 240 pixels in the horizontal direction and 240 pixels in the surface direction, and one area divided into 9 is 80 pixels in the horizontal direction and 8 pixels in the vertical direction.
The number is 0.

The function of this system is that by pressing the multi-screen display switch 15, the image on the TV screen can be reduced to the H%p area in FIG. 2 and displayed as a moving image, and by pressing the still image inset switch 16, The image displayed in area i at that moment can be inserted into areas a to h one by one as still images.

This operation will be explained in order below. When the multi-screen display switch 15 is pressed, the output H of the flip-flop 10 is inverted and becomes a high level. Also, the demodulated video signal A is 5/3MHz
The signal E is converted into a digital signal E by the A/D converter 7 at the clock of Written by a write signal. Reading is also performed by the memory control circuit 1) by utilizing the idle time of memory access for writing.

Also, when the flip-flop 10 output H is high level,
Since the switch 3 is connected to the 2 side, the video signal F read out from the video memory 8 is converted into an analog signal G by the D/A converter 9, and then guided to the video output circuit 4 and sent to the cathode ray tube. 14, the portion marked i on the screen is displayed as a moving image.

By the way, when the still image insertion switch 16 is pressed at this time, when writing a moving image to the video memory 8, the address of one M3ti of the other a to h is written to the video memory 8 by the memory control circuit 1) for one field only. Given. Therefore, each time the switch 16 is pressed, the images at that moment are stored one by one in the area a = h of the video memory 8, and these are read out every field and displayed on the cathode ray tube 14 as a still image.

Here, in the memory control circuit 1), in order to display a still image in the area a-yh on the TV screen and a moving image in the area i, in addition to the main address counter for reading the entire video memory, A write sub-address counter is provided independently for displaying the video and for writing to areas a to h, and while the main address counter is operating and reading the video memory, the idle time of memory access is The sub-address counter operates to thin out the TV image horizontally and vertically to the above i.
or a % h area.

In this device configured as described above, while displaying a moving image on the TV screen in the part i in Fig. 2, the viewer's switch 1 is pressed.
By the operation 6, the images of that moment can be embedded and displayed as still images one by one in the areas a y h, providing a convenient function.

〔Effect of the invention〕

As described above, according to the present invention, a television signal is digitized, thinned out, stored in a plurality of areas of a video memory, and read out at once to display N still images including one moving image on a cathode ray tube. As a result, the viewer can display their favorite screen as a still image while watching the video, and since the video is being displayed at the time, no other monitor display device is required, making it extremely useful. This has the effect of providing a high quality multi-screen display device.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a television receiver according to an embodiment of the present invention, and FIG. 2 is a diagram showing a storage area of a video memory in the above embodiment. 7... A/D converter, 8... Video memory, 9...
D/A converter, 1)...Memory control circuit (writing means, reading means), 14...Cathode ray tube.

Claims (2)

[Claims] (1) A/D that converts television signals into digital signals
a converter, a video memory having N areas for storing the output of the A/D converter, and a video signal obtained by sampling the digitized video signal on the horizontal and vertical time axes in each area of the video memory. A writing means for writing an image of 1/N of the size of a single image continuously for moving images and at an arbitrary timing for still images; and a reading means for reading out the entire video memory having the N areas in one field or one frame time. and a D/A converter for converting the read signal into an analog signal, and is configured to simultaneously display N images including one moving image from the video memory on the cathode ray tube. television receiver. (2) The television receiver according to claim 1, wherein the timing for writing the still image into the video memory is a timing specified by a viewer.