JPH0514830A - Television receiver - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a television receiver capable of clearly confirming that high-definition broadcasting has started even when watching NTSC broadcasting. [Structure] In a television receiver capable of receiving an NTSC broadcast signal and a MUSE signal, the MUSE signal is transmitted to the NT.
MUSE detection circuit 1 for detecting a MUSE signal from the down converter 9 for converting into an SC broadcast signal
0 detects the MUSE signal, and the detection signal causes the window control unit 18 to operate the PIP (Picture in Picture) control unit 19, and NTSC converted MUS
The E signal is displayed on the sub screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts an MUSE signal transmitted in high-definition broadcasting into an NTSC signal.
The present invention relates to a technique used for a television receiver or the like equipped with a USE / NTSE down converter.

[0002]

2. Description of the Related Art In recent years, satellite broadcasting (hereinafter referred to as BS broadcasting)
The interest in the TV receiver has become very high, and the development of a television receiver with a built-in BS tuner capable of receiving a BS broadcast is becoming more and more active. In particular, the above-mentioned B
A television receiver with a built-in S tuner also has a tuner that can receive NTSC broadcasts, which means that there are two tuners.

Such a television receiver is equipped with a picture-in-picture (hereinafter referred to as PIP) capable of displaying signals received from two tuners on the same screen in order to effectively use the two tuners. Have been developed. (For example, magazine "TV technology" 1
(See P17 to P28 of the December 990 issue) In addition, broadcasting of new media called high-definition broadcasting in BS broadcasting has begun to be regularly operated. This high-definition system has an aspect ratio of 16: for the purpose of providing a high-definition image that is more realistic than the NTSC system.
It is set to 9.

On the other hand, on the other hand, the development of an NTSC converter for displaying this new medium on a widely used NTSC type television receiver is also in progress. (For example, magazine "TV Technology" 1989 1
The MUSE / NTSC downconverter is detailed on pages 40-45 of the January issue. Therefore, in order to receive the high-definition broadcast, the above-mentioned MUSE / NTSC down converter may be further incorporated in the above-mentioned BS tuner built-in television receiver.

By the way, in a television receiver which can also see the MUSE signal described above, when watching NTSC broadcasting, for example, when high-definition broadcasting is started by BS broadcasting, it is confirmed that high-definition broadcasting has started. There is no means. Also, even if you check it,
There was a drawback that you had to switch from the NTSC broadcast you are watching now to the BS broadcast and check the broadcast channel.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and provides a television receiver capable of clearly confirming that high-definition broadcasting has started even when watching NTSC broadcasting. The purpose is to provide.

[0007]

SUMMARY OF THE INVENTION The present invention is a MUS in which a standard television signal and a high-definition television signal having a wider band than the standard television signal are compressed to a transmittable band.
In a television receiver capable of receiving an E signal, a parent-child screen function means capable of displaying a plurality of signals on the same screen as a parent screen and a child screen, a detection means for detecting the MUSE signal, and a detection output from the detection means. And a control means for controlling the MUSE signal to be displayed on the small screen.

[0008]

According to the present invention, with the above-described structure, when the high-definition broadcast is started, the high-definition broadcast image is inserted and displayed as a sub-screen on the screen viewed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. First, in FIG. 1, 1 is an antenna for NTSC broadcasting, 2 is an antenna for BS broadcasting, 3 is an external input terminal for MUSE signal, 4 is an external input terminal, 5 is a tuner for NTSC broadcasting, 6 is a tuner for BS broadcasting, 7 Is an IF signal processing circuit, 8 is a BS signal IF signal processing circuit, 11 is a video signal processing circuit, 12 is a PIP signal processing circuit, 20 is a character generator for generating character signals, and 13 is a video signal processing circuit 11. A synthesizing circuit for selectively synthesizing the signals of the PIP signal processing circuit 12 and the character generator 20, 14 is a CRT (cathode ray tube).

A down converter 9 is an IF signal processing circuit 8 or an external input terminal 3 for MUSE signal.
In the case of the MUSE signal obtained from the above, it is converted into the NTSC signal, and the NTSC signal is passed as it is. A MUSE detection circuit 10 detects the frame pulse of the MUSE signal and the MUSE-specific transmission control signal multiplexed in the vertical blanking period to detect the MUSE signal.

Reference numeral 15 denotes an operation unit for instructing switching of channel selection and signals. Reference numeral 16 is a tuning controller for sending a tuning signal to the tuner 5 for NTSC broadcasting, a tuner 6 for BS broadcasting, switching signals, and displaying a character signal on a CRT, and 17 is a nonvolatile memory storing tuning data and the like. Memory, 19 is a PIP for controlling selection of the PIP signal processing circuit 12 and the child screen signal
A control unit 18 is a window control unit, which is a MUSE detection circuit 1
When the output is 0, the PIP control unit 15 is controlled.

SW1 is a switch for switching signals from the NTSC broadcasting antenna 1, BS broadcasting antenna 2 and the external input terminal 4, and SW2 is a switch for selecting and switching a sub-screen signal.

Next, the operation of the present invention will be described with reference to FIG. First, the operation unit 15 specifies a function of detecting a MUSE signal and automatically displaying it as a child screen (hereinafter referred to as a MUSE window function). Then, the window control unit 1
8 receives the detection signal from the MUSE detection circuit 10,
When there is a USE signal, MUSE is displayed on the screen currently being viewed.
The PIP control unit 19 sets the SW2 to the down converter 9 side so that the signal is inserted as a child screen, so that the NTSC-converted MUSE signal is automatically displayed as the child screen.

Further, as shown in FIG. 3, the display is a parent screen 33.
The child screen 34 is displayed on the screen, and the channel display is performed simultaneously for both the parent 31 and the child 32. This display remains displayed until the operator stops it.

On the other hand, when the MUSE detection circuit 10 detects that there is no MUSE signal, it gives a command to the channel selection control unit 16 to switch the channel of the BS broadcast, and operates it. Then, if the MUSE signal is present on the switched channel, the sub screen is displayed. In addition, when there is no MUSE signal, the channel switching of the BS broadcast may be performed at regular intervals (every 1 minute, for example).

Further, the MUSE window function operates so as to always display the small screen if there is a MUSE signal unless the operator stops this function. Then, once this function is set, it is stored in the non-volatile memory 17, and the tuning control unit 16 sets the non-volatile memory 17 so that the MUSE window function is performed even if the power is turned off and then turned on again. Window controller 1
A control signal is given to 8.

The BS broadcast channel may not be switched as described above and may be fixed to the same channel.

Furthermore, from the external input terminal 3 for MUSE signal, a VTR (video tape recorder) or LDP
A MUSE signal such as (laser disc player) is input. In that case, when performing a search with a VTR or LD, the MUSE signal is not reproduced during access, so the MUSE signal is reproduced when the access ends even if you are watching NTSC broadcast or BS broadcast during that time. The sub screen MUSE signal of the PIP is displayed and it can be seen that the search is completed.

[0019]

As described above, according to the present invention, other channels can be viewed until the high-definition broadcast starts without having to worry about the start time of the high-definition broadcast. Further, there is an effect that other broadcasts can be seen and the end of access can be known even during a period in which a signal being accessed such as a VTR or LDP which outputs a MUSE signal is not reproduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing the operation of the present invention.

FIG. 3 is a diagram showing a screen display of the present invention.

[Explanation of symbols]

 1 Antenna for NTSC broadcasting 2 Antenna for BS broadcasting 3 External input terminal for MUSE signal 4 External input terminal 9 MUSE / NTSC down converter 10 MUSE signal detection circuit 12 PIP signal processing circuit 15 Operation part 16 Tuning control part 18 Window control part 19 PIP control unit SW2 switch

Claims (1)

Claim: What is claimed is: 1. A television receiver capable of receiving a standard television signal and a high-definition television signal having a wider band than that of the standard television signal. Parent-child screen function means that can be displayed on a screen, detection means that detects the high-definition television signal, and control that controls the display based on the high-definition television signal to display on the child screen based on the detection output from the detection means. A television receiver characterized by comprising means.