JPH08111854A - High vision receiver - Google Patents

Abstract

PURPOSE: To automatically switch an input signal in the changeover between a High Vision base band signal or a MUSE signal and an NTSC signal. CONSTITUTION: The receiver is provided with a High Vision video signal detection circuit 14 for discriminating whether or not a High Vision video signal is received and only when the High Vision video signal is detected, an input changeover circuit 16 selects a High Vision base band signal 13 and selects an NTSC signal 12 in other cases and the selected signal is displayed on a display section 17. Thus, it is not required to distinguish whether a video image during reproduction is a High Vision video image or an NTSC video image and to switch video images manually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a function for automatically switching an input signal in a high-definition receiver.

[0002]

2. Description of the Related Art The conventional high-definition receiver is the first
When combined with a VTR capable of reproducing both the high-definition baseband signal and the NTSC signal, when the high-definition baseband signal is being reproduced, it is on the high-definition side, and when the NTSC signal is being reproduced, it is N.
It was necessary to manually switch the input to the TSC side using the input switching key on the high-definition receiver side or the remote controller. Secondly, when combined with a laser disc player capable of reproducing both MUSE and NTSC signals, M when the MUSE signal is being reproduced.
When the NTSC signal is reproduced on the USE side, N
It was necessary to manually switch the input to the TSC side using the input switching key on the high-definition receiver side or the remote controller.

[0003]

However, a high-definition baseband signal and N are recorded on one video tape.
If the TSC signal is recorded alternately, or if the signal recorded on the video tape is unclear whether it is the HDTV baseband signal or the NTSC signal, the video signal being played can be automatically switched to switch the input signal. It is necessary to send a distinguishing control signal from the VTR side to the HDTV receiver using another cable. However, there is no unified standard for the control signal for distinguishing the video signal during VTR reproduction, and when a VTR and a high-definition receiver of different manufacturers are connected, there is no means for automatically switching the input signal and the signal is reproduced. There was the annoyance of having to manually switch the input on the high-definition receiver side according to the video signal.

When the signal recorded on the laser disk is unclear whether it is the MUSE signal or the NTSC signal, the signal being reproduced is MUSE in order to automatically switch the input signal.
It is necessary to send a control signal that distinguishes between the signal and the NTSC signal from the laser disc player side to the HDTV receiver using another cable.
There is no unified standard for control signals that distinguish the signals being played by the player. Therefore, when laser disc players and high-definition receivers from different manufacturers are connected, there is no means to automatically switch the input signal, and you must manually switch the input on the high-definition receiver side according to the reproduced signal. There was a hassle.

In view of the above problems, the present invention provides a high-definition video signal or M input at the high-definition receiver side.
The purpose is to detect the USE signal and automatically switch the input signal.

[0006]

In order to solve the above problems, a high-definition receiver of the present invention firstly provides a high-definition baseband output on the VTR side to a high-definition baseband input on the high-vision receiver side and a high-definition baseband input on the VTR side. NTS
In the configuration in which the C video output is connected to the NTSC video input on the HDTV receiver side, a circuit for detecting the HDTV video signal input to the HDTV baseband input of the HDTV receiver is provided, and the HDTV signal is detected when the HDTV video signal is detected. The input is switched to the side, and when the high-definition video signal is not detected, the input is switched to the side of NTSC.

Secondly, the MUSE signal output from the laser disc player side is changed to the MUSE signal from the high-definition receiver side.
In the configuration in which the NTSC video output of the laser disk player side is connected to the NTSC video input of the high-definition receiver side to the input, a circuit for detecting the MUSE signal input to the MUSE input of the high-definition receiver is provided.
When the USE signal is detected, the input is switched to the MUSE side, and when the MUSE signal is not detected, the input is switched to the NTSC side.

[0008]

With the above arrangement, the present invention can perform automatic input switching for receiving a high-definition image when a high-definition image signal is detected and for receiving an NTSC image signal when no high-definition image signal is detected. Further, it is possible to perform automatic input switching for receiving the MUSE signal when the MUSE signal is detected and receiving the NTSC video signal when the MUSE signal is not detected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-definition television receiver according to an embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of an HDTV receiver combined with an HDTV VTR according to the first embodiment of the present invention. In FIG. 1, 11
Is a high definition VTR, 12 is an NTSC signal, 13 is a high definition baseband signal, 14 is a high definition video signal detection circuit, 15 is a high definition video signal detection signal,
Reference numeral 16 is an input switching circuit, 17 is a display section, 18 is a display section drive circuit, and 10 is a block of a high-definition receiver.

Next, the operation of the above apparatus will be described. Reference numeral 11 is a high-definition VTR capable of reproducing both NTSC signals (V or Y / C) and high-definition baseband signals (Y, Pb, Pr), such as W-VHS.
A type of video equipment corresponds to this. The high definition baseband output on the VTR side is input to the high definition baseband input on the high definition receiver side and the NTSC on the VTR side.
The video output is connected to the NTSC video input on the HDTV receiver side. NT input to HDTV receiver
The SC video signal 12 and the HDTV baseband signal 13 are input to an input switching circuit 16 that selects an input signal. At the same time, the high-definition baseband signal 13 is also input to the high-definition video signal detection circuit 14 and outputs the high-definition video signal detection signal 15 only when the high-definition video signal is detected. The high-definition video signal detection circuit 14 is, for example, an IC (M52) for synchronizing signal separation.
036SP, manufactured by Mitsubishi Electric, etc.) and a monostable multivibrator IC (MN74HC123S, manufactured by Matsushita, etc.). The input switching circuit 16 selects the high-definition baseband signal 13 only when the high-definition video signal detection signal 15 is input,
At the same time, the display drive circuit 18 drives the display 17 such as a CRT so that the high-definition baseband signal can be displayed only when the high-definition video signal detection signal 15 is input. When the high-definition video signal detection circuit 14 does not detect the high-definition video signal and the high-definition video signal detection signal 15 is not output, the input switching circuit 16 selects the NTSC signal 12, and at the same time, the display drive circuit 18 displays the NTSC signal. Display section 17
Drive.

As described above, according to this embodiment, an automatic input switching function is provided in which a high-definition video is displayed only when a high-definition baseband signal is input and an NTSC signal is displayed when a high-definition baseband signal is not input. It can be installed in a high-definition receiver.

(Embodiment 2) FIG. 2 is a block diagram showing the configuration of a high-definition receiver combined with a laser disk player according to a second embodiment of the present invention. In FIG. 2, 21 is a laser disk player and 22 is N.
TSC signal, 23 is MUSE signal, 24 is MUSE decoder circuit, 25 is HDTV baseband signal, 26
Is a MUSE detection signal, 27 is an input switching circuit, 28 is a display section, 29 is a display section drive circuit, and 20 is a block of a high-definition receiver.

Next, the operation will be described. 21 is a laser disc player capable of reproducing both NTSC signals (V or Y / C) and MUSE signals. The MUSE signal output of the laser disc player side is input to the MUSE input of the high-definition receiver side, and the laser disc player side NTSC video output is N on the HDTV receiver side.
Connected to TSC video input. HDTV baseband signal 2 in which the MUSE signal 23 input to the HDTV receiver is decoded by the MUSE decoder circuit 24
5 and NTSC video signal 22 are input to an input switching circuit 27 that selects an input signal. Further, the MUSE decoder circuit 24 receives the MUS signal when the MUSE signal is input.
The E detection signal 26 is output. In addition, MUSE detection signal 2
6 can be easily taken out by a method such as detecting the lock signal of the MUSE decoder circuit 24. The input switching circuit 27 selects the HDTV baseband signal 25 only when the MUSE detection signal 26 is input,
At the same time, the display drive circuit 29 drives the display 28 such as a CRT so that the high-definition baseband signal can be displayed only when the MUSE detection signal 26 is input. Also,
In the MUSE decoder circuit 24, the MUSE detection signal 2
When 6 is not output, the input switching circuit 27 outputs NT
SC input is selected and at the same time the display drive circuit 29 is set to NTS.
The display unit 28 is driven so that the C signal can be displayed.

As described above, according to this embodiment, a high-definition image is displayed only when the MUSE signal is input, and an NTSC signal is displayed when the MUSE signal is not input to the high-vision receiver. You can have it.

[0016]

As described above, according to the high-definition receiver of the present invention, by providing the circuit for detecting the high-definition video signal and the MUSE signal, the input can be automatically switched according to the reproduced video signal. it can.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a high-definition receiver according to a first embodiment of the present invention.

FIG. 2 is a configuration block diagram of a high-definition receiver according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Hi-vision receiver block diagram 11 Hi-vision VTR 12 NTSC signal 13 Hi-vision baseband signal 14 Hi-vision video signal detection circuit 15 Hi-vision video signal detection signal 16 Input switching circuit 17 Display unit 18 Display unit drive circuit 20 Hi-vision receiver block diagram 21 Laser disk player 22 NTSC signal 23 MUSE signal 24 MUSE decoder circuit 25 Hi-Vision baseband signal 26 MUSE detection signal 27 Input switching circuit 28 Display unit 29 Display unit drive circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Ishida 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A VT capable of reproducing both a high definition baseband signal and an NTSC signal with a high definition receiver.
With the combination of R, the HDTV baseband output is connected to the HDTV baseband input on the HDTV receiver side and the NTSC video output on the VTR side is connected to the NTSC video input on the HDTV receiver side. And a high-definition reception function characterized by having an automatic input switching function for receiving a high-definition image when the high-definition image signal detection circuit detects the high-definition image signal and receiving an NTSC image signal when the high-definition image signal is not detected. Machine. 2. A combination of a high-definition receiver and a laser disc player capable of reproducing both MUSE signals and NTSC signals, wherein the MUSE output of the laser disc player side is connected to the MUSE input of the high-definition receiver side and the laser disc player side. In the configuration in which the NTSC video output of the above is connected to the NTSC video input of the high-definition receiver side, a MUSE decoder circuit is provided, and the M
When the MUSE signal is detected by the USE decoder circuit, M
2. The HDTV receiver according to claim 1, further comprising an automatic input switching function for receiving a USE signal and receiving an NTSC video signal when the MUSE signal is not detected.