JPH1155592A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the television receiver that imposes no load onto the user, has a degree of freedom and where its screen is divided into an optimum multi- screen depending on number of selected channels. SOLUTION: The television receiver where video signals of pluralities of channels are displayed on a monitor 17 simultaneously as a multi-screen is provided with a ROM 019 that stores regional codes and reception available channels for each region. A system control circuit 018 controls a PinP control circuit 013 by having only to enter a regional code by the user, automatically decides a number of multi-screens, minimizes non-display division screen number, maximizes display division screen number and validates the screen area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver and, more particularly, to appropriately determining the number of multi-screen divisions in a television, a VTR, and the like.

[0002]

2. Description of the Related Art In the prior art, since the number of divided screens is fixed at first, the number of selectable channels is smaller than the number of divided displays in some areas, and there are many unnecessary divided screens. There was a thing.

To solve this problem, Japanese Patent Application Laid-Open No. 1-238386 discloses a method of setting an optimal number of divided screens based on a plurality of selectable channels.

The technique described in the above publication is superior to the method of dividing a fixed screen in that video signals of a plurality of channels are displayed by the number of divided displays according to the number of selectable channels.

[0005]

However, in the above-mentioned conventional improved technique, it is necessary for the user to register a plurality of selectable channels to be displayed on the divided screen. A specific example of this operation will be described.

A circuit for controlling channel selection (hereinafter, referred to as a control circuit) and a circuit for detecting broadcast radio waves (hereinafter, referred to as a detection circuit) are provided to allow a user to register a selectable channel to be displayed on a split screen. The channel is selected by the control circuit in accordance with a user's instruction, and the channel in which the broadcast wave has been detected by the detection circuit is stored in the memory. These must be performed according to the number of selectable channels.

[0007] This is an enormous amount of work, which imposes a heavy burden on the user, and is not a so-called user-friendly product.

If the registration work is to be executed in advance according to the place where the apparatus is to be used, it must be performed differently on a manufacturing line. If the user moves, the user must again carry out the registration work with a burden, and there is a problem that the degree of freedom of the user is reduced.

Further, the channel that the user wants to register is not always registered depending on the performance of the detection circuit and the radio wave condition.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a small burden on a user, is flexible and easy to use in any place of use, and has a wide variety of production lines. Rather, it is an object of the present invention to provide a television receiver divided into an optimal multi-screen according to the number of selectable channels.

[0011]

In order to achieve the above object, a television receiver according to the present invention has a structure for simultaneously receiving a plurality of channels and simultaneously outputting a plurality of channels to a plurality of reception tuning circuits. 2. Description of the Related Art In a television receiver for displaying a video signal simultaneously and separately on a monitor screen, a multi-screen division number is determined according to a receivable channel or a selected number of channels, and a predetermined multi-screen division number is determined. The number of non-display divided screens is minimized.

In another configuration of the television receiver according to the present invention, in the above-described television receiver, a receivable channel or the number of selected channels is stored in advance in association with a region code, and when used, The multi-screen division number to be displayed by inputting the area code is automatically determined.

Still another configuration of the television receiver according to the present invention is characterized in that the storage of the number of channels corresponding to the area code is an erasable / writable memory.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration of a television receiver according to the present invention is such that a receivable channel or the number of selected channels is stored in advance in association with a region code,
At the time of use, the number of divided multi-screens displayed by inputting the area code is automatically determined.

FIG. 1 is a block diagram of a television receiver according to one embodiment of the present invention, FIG. 2 is a channel diagram showing the configuration of an area code used in the television receiver of FIG. 1, and FIG. 2 is a flowchart of determining the number of divisions of a multi-screen by an area code in the television receiver of FIG. 1.

[Embodiment 1] First, an outline of a configuration of a television receiver according to an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, 001 is VHF / UHF
A television signal terminal, 002 is a BS television signal terminal, 003 is a video signal input terminal, 004, 00
5 is a tuning circuit 1 for selecting a channel signal of a specific broadcasting station from the VHF / UHF television signal terminal 001 and outputting an image signal.
The tuning circuit 2, 007, which selects a specific channel signal from the BS television signal terminal and outputs an image signal,
The switching circuit for each signal of 03, 004, 005, 008
Circuits 009 and 012 for separating and outputting a luminance signal and a color signal from the image signal are color demodulation circuits for converting the luminance and color signals into luminance and color difference signals.

Reference numeral 010 denotes a time axis compression circuit for enlarging / compressing the luminance and color difference signals in the horizontal direction, and 013 denotes a PinP (Picture in P) for creating a divided screen.
control circuit; 014, a signal switching clamp circuit for sequentially clamping and synthesizing image signals of respective channels; 015, an RGB signal processing circuit for converting luminance and color difference signals into RGB signals; 016, an RGB signal processing circuit; A deflection control circuit 017 for synchronizing and deflecting is a CRT for projecting an image.

Reference numeral 020 denotes a writable / erasable nonvolatile memory, and its stored data is retained even when the power is turned off. The number of channels displayed in the multi-screen is written in this. 019 is a receivable channel and a region code for each region (this will be described later).
The stored ROM, 018, is a system control circuit for controlling the entire system with the dashed control wiring shown in FIG.
Is an operation unit that outputs a command signal to the system control circuit 18.

Next, an area code closely related to the function of the television receiver of the present invention will be described with reference to FIG.

As described above, at present, the number of receivable channels or the number of selectable channels differs depending on the location and region. As shown in FIGS. 2A and 2B, for example, in the 23 wards of Tokyo, NHK General 1 (1), NHK Education 3
(3), Nippon Television 4 (4), MX Television 14 (5),
TBS TV 6 (6), TV Tokai 88 (7), Fuji TV 8 (8), TVK TV 42 (9), TV Asahi 1
0 (10), Chiba TV 46 (11), TV Tokyo 12
(12), a receivable BS channel is added to this, and the area code is set to “13”. The numbers in parentheses are the operation numbers of the operation devices. In this way,
The whole of Japan is delimited by area codes from Sapporo "01" to Sasebo "99".

Next, registration of a receivable channel or the number of selectable channels in relation to the area code shown in FIG. 2 in the television receiver having the configuration shown in FIG. 1 will be described. For the sake of explanation, the above items may be duplicated.

In the initial state where nothing is set, the memory 0
At 29, the channels set at all positions are written as multi-screen display channels.

That is, VHF: 1 to 12 ch · BS:
1 to 15 channels and some other external input signals.

Next, the registration operation will be described.

For example, a description will be given by taking the area code "13" as an example.

When the area code "13" is input from the user via the operation device 021, a receivable channel corresponding to the area code "13" stored in the ROM 019 is called, and this is stored in the memory 020 in the multi-screen display channel. To be stored. Further, it is possible to additionally register a channel that does not correspond to the area code specified by the operation of the operation device 21, another signal input, or delete a registered channel.

For example, video input and CATV can also be registered and stored as multi-screen display channels.

Next, an optimal multi-screen division number determining method will be described with reference to FIG. 3 using the registered contents of the memory 020.

The number of multi-screen divisions is 4, 6, 9,
It is assumed that the divided screens are 12, 16, and 20. The optimal number of divided multi-screens is equal to or more than the number of selectable channels and the minimum number of divided screens. If the number of selectable channels is 20 or more, the number of divisions is set to 20. The minimum division number is four screens.

First, the user instructs the operation device 21 to start a multi-screen.

Next, in step (hereinafter, referred to as S) 1, the control system circuit 018 reads the multi-screen display channel stored by the above-described registration operation from the memory 020.

At S2, the system control circuit 018
Counts the number A of display channels read, and
The number of divided screens is determined through the steps from 3 onward.

In S3, the number of display channels A is 16
If it is larger, the system is controlled so as to make 20 divisions. If the number A of display channels is smaller than 16, the process proceeds to the next S.

In S4, the number of display channels A is 12
If it is larger, the system is controlled so as to make 16 divisions. If the number A of display channels is smaller than 12, the processing shifts to the next S.

In S5, if the number A of display channels is larger than 9, the system is controlled so as to be divided into twelve. If the number A of display channels is smaller than 9, the process proceeds to the next S.

In S6, if the number A of display channels is larger than 6, the system is controlled so as to be divided into nine. If the number A of display channels is smaller than 6, the processing shifts to the next S.

In S7, if the number A of display channels is larger than 4, the system is controlled so as to be divided into six. If the number A of display channels is smaller than 4, the system is controlled so as to be divided into four. Thus, the optimal number of divided screens is determined.

Next, system control of an example of a divided screen when the area code "13" is designated in the television receiver of FIG. 1 will be described.

When the user instructs the start of the multi-screen by the operating device 21, the system control circuit 018 determines the number of the divided screen to be 12 by the multi-screen division number determining method. Next, in the system control circuit 018, a tuning circuit 2005, specifically, a tuner is set so as to tune to the NHK General 1.

The television signal of NHK Comprehensive 1 derived by this channel selection is input to a PinP control circuit 013 via a signal switching circuit 007, a Y / C separation circuit 011 and a color demodulation circuit 012.

The PinP control circuit 013 is composed of a memory, a memory controller and a synchronization circuit, and the television signal is written into the memory according to an instruction from the memory controller.

The memory controller determines from the system control circuit 018 that the number of divided screens is 12, that is, 1 / horizontal.
4. It is controlled so that the video is compressed to 1/3 vertically and written to the memory.

On the other hand, the signal from the channel selection circuits 1 and 3 or the video signal input terminal is supplied from the signal switching circuit 007 to Y /
The signal is input to a signal switching clamp circuit 014 via a C separation circuit 008 and a color demodulation circuit 009 and a time axis compression circuit 010.

The television signal written into the memory of the PinP control circuit 013 is called by a synchronization signal from a synchronization circuit, is input to the signal switching clamp circuit 014, and receives the signal from the time axis compression circuit 010 and Synthesized.

However, in the case of a multi-screen, the Pin
Only the signal from P control circuit 013 is output.

The signal output from the signal switching clamp circuit 014 is output to the CRT 017 via the RGB signal processing circuit 015 and the deflection control circuit 016 and displayed.

This operation and processing are performed for all channels, that is, from NHK Education 3 to TV Tokyo 12, and a multi-image of 12 divisions is displayed.

In the above description, the operating device 21 is a remote controller in the drawing, but it goes without saying that the operating device 21 may be an icon.

The registration of the multi-screen display channel and the area code is performed in an erasable / writable memory, for example, EEPR.
Since the OM is used, the registered contents can be easily corrected if necessary.

Although the detailed description of the synthesis of the video signal input and the input from the BS channel has been omitted, it goes without saying that it is the same as the above description.

It goes without saying that the individual sizes of the composite screen can be freely set by the PinP control circuit.

Further, it goes without saying that other codes may be used instead of the above-mentioned area codes.

[0054]

As described above in detail, according to the configuration of the present invention, the burden on the user is small, the degree of freedom can be varied in any place of use, and the production line is not diversified and the station is selected. It is possible to provide a television receiver divided into an optimal multi-screen according to the number of possible channels.

[Brief description of the drawings]

FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention.

FIG. 2 is a configuration channel diagram of an area code used in the television receiver of FIG. 1;

FIG. 3 is a flowchart of determining a multi-screen division number based on an area code in the television receiver of FIG. 1;

[Explanation of symbols]

001: VHF / UHF television signal terminal, 002
... BS television signal terminal, 003 ... video signal input terminal, 004 ... tuning circuit 1, 005 ... tuning circuit 2,00
6. Tuning circuit 3, 007 ... Switching circuit for each image signal, 00
8 ... Y / C circuit for separating a luminance signal and a chrominance signal, 009,
012: color demodulation circuit, 010: time axis compression circuit, 013
... PinP control circuit, 014 ... Signal switching clamp circuit,
015 ... RGB signal processing circuit, 016 ... deflection control circuit,
017 ... CRT, 018 ... System control circuit, 019 ...
ROM, 019 ... Erasable / writable memory, 021
… Controller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takaaki Matino 292 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Visual Information Media Division, Hitachi, Ltd. (72) Inventor Takahiro Mizuguchi Totsuka-ku, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (292) Inventor Yoshiji Okada 292 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Image Information System, Inc.

Claims (3)

[Claims] 1. A television receiving apparatus for simultaneously receiving a plurality of channels and simultaneously and separately displaying a plurality of channels of video signals led to a plurality of reception tuning circuits on a monitor screen. A television receiver comprising: a multi-screen division number determined according to a channel or a selected channel number; and a non-display division screen number is minimized among predetermined multi-screen division numbers. 2. The television receiver according to claim 1, wherein a receivable channel or the number of selected channels is stored in advance in association with a region code, and is displayed by inputting the region code at the time of use. A television receiving apparatus for automatically determining a multi-screen division number. 3. The television receiver according to claim 2, wherein the storage of the area code and the number of corresponding channels is an erasable / writable memory.