JPH0491584A - High-definition television receiver - Google Patents

Abstract

PURPOSE:To output high-definition television signals after converting the signals into NTSC signals by providing a scanning line number converting section which converts MUSE signals into the NTSC signals. CONSTITUTION:BS-IF signals inputted through an input terminal F are inputted to a selector 9 through an input terminal E after the signals are converted into MUSE signals by means of a BS tuner section 10. The MUSE signals are returned to high-definition television signals by means of a MUSE decoder 1 and outputted to a selector 7. High-definition television signals from the outside are inputted to the selector 7 through an input terminal A and either one of the high-definition television signals is selected by means of a control signal from a control section 4 and outputted to a scanning line number converting section 13. The high-definition television signals are converted into NTSC signals having a different aspect ratio and scanning line number and can be connected to external equipment through an output terminal I.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention receives a high-definition television signal 2 and projects it on a high-definition television display, and also receives an NTSC signal and converts the number of scanning lines and aspect ratio. The present invention relates to a high-definition television receiver having a function of converting the high-definition television signal into an NTSC signal by converting the number of scanning lines and aspect ratio of the high-definition television signal to a high-definition television display. It is something.

Conventional technology In recent years, MUS, which subsamples one image into four fields and transmits it, has been used as a high-definition television transmission system.
Systems different from the NTSC signal, which is a conventional television signal, such as the E signal, have been developed and are coming into use. Accordingly, there is a need for a high-definition television receiver that can receive and display signals of multiple types (systems) on a single display.

Figure 2 is a schematic block diagram showing the configuration of a conventional high-definition television receiver having the function of displaying multiple types of signals. An MtJSE decoder unit converts the band-compressed MUSE signal into a high-definition television signal, and 6 connects an external U/V tuner (not shown) from the BS tuner to the terminal CD. 2 is a selector for switching the NTSC signal, which is the current standard television signal manually input, and outputting one of the signals; 2 is the output signal (N) of the selector 6;
3 is an up-converter section for doubling the number of scanning lines of the TSC signal and performing double-speed conversion processing; 3 is an aspect conversion section for converting the horizontal scanning time of the output signal of the up-converter section 2 and converting the aspect ratio; 7 is a high-definition television signal input from the outside through terminal A,
A selector 8 switches between the high-definition television signals inputted from the MUSE decoder section 1 and outputs one of them, and a selector 8 converts the double-speed and aspect-converted NTSC signals inputted from the aspect conversion section 3 to the selector. 7 is a selector for switching and outputting an input high-definition television signal; 5 is a high-definition television display for displaying a manually inputted video signal from selector 8; 4 is the selector; This is a control unit that controls switching between 6.7 and 8.

The operation of the high-definition television signal configured as described above will be explained below.

A MUSE signal input manually from an external BS tuner is input from input terminal B, processed by the MUSE decoder section 1, and returned to a baseband high-definition television signal.
It is output to the selector 7.

Similarly, to the other input of the selector 7, a baseband high-definition television signal is input from the outside through the input terminal A. One of these two high-definition television signals is selected by a control signal output from the control section 4, and its output is input to one input of the selector 8.

Similarly, the NTSC signal input from the BS tuner is outputted to one of the selectors 6 through the input terminal C. The other input of the selector 6 receives an NTSC signal from an external U/V tuner through an input terminal. Either one of these two NTSC signals is selected by the control signal output from the control section 4, and the output is converted to double the number of scanning lines by the up-converter section 2, and further converted to double speed from the up-converter section 2. The NTSC signal is input to the aspect converter 3 in order to correctly display full-screen information on high-definition television signals having different aspect ratios.

FIG. 3 is a characteristic diagram of the case where the double-speed converted NTSC signal is correctly displayed on the high-definition television display 5 by performing aspect conversion, and the case where it is displayed correctly without aspect conversion. In the same figure, (a) is the input N
TSC signal screen ([Yes]) is NTSC converted to double speed.
A screen when the signal is projected on a high-definition television display without aspect conversion, (C) is an NTSC signal converted to double speed and then aspect converted,
This shows a screen displayed on a high-definition television display. If aspect conversion is not performed when displaying the double-speed converted NTSC signal on the high-definition television display 5, the screen will become horizontally elongated as shown in (b), making it difficult to display the screen information correctly. Therefore, the aspect converter 3 double-speed-converts the NT output from the up-converter unit 2.
The SC signal is subjected to aspect conversion to maintain the roundness of the screen as shown in Figure 3 (C1), and is output to one input of the selector 8.Finally, the selector 8 inputs the high-definition television signal manually. One of the two inputs of the double-speed converted NTSC signal is switched by a control signal from the control section 4 to be displayed on a high-definition television display.

Problems to be Solved by the Invention However, as can be seen from the operation and configuration of the conventional example, in the conventional high-definition television receiver, when recording screen information of the high-definition television, the high-definition television VT
R must be used.

However, high-definition television VTRs are expensive, and it will take a considerable number of years for them to become popular among general users. Therefore, high-definition television signals can be converted to NTSC.
It is common practice to record on a current standard television VTR using a down converter to convert the signal into a signal, but conventional high-definition television receivers do not have the above-mentioned down converter function.

Therefore, the present invention is based on the above-mentioned problems, eliminates the drawbacks, has the function of displaying multiple signals with a simple configuration, and transmits high-definition television signals to standard televisions with different numbers of scanning lines and aspect ratios. The purpose of the present invention is to provide a high-definition television receiver having a function of converting the signals into television signals.

Means for Solving the Problems The high-definition television receiver of the present invention includes a MUSE decoder section, an up-converter section, an aspect conversion section, a selector for switching various signals, a display for high-definition television signals, a control section, and a BS antenna. A BS that selects the desired broadcast channel from among the BS-IF multiplied signals from and demodulates it into an NTSC signal, MU, and SE signal.
A tuner section, a U/V tuner section that demodulates terrestrial UHF and VHF signals and converts them into baseband NTSC signals, and a scanning line number conversion section that converts MUSE signals into N and TSC signals. It is characterized by

According to the high-definition television receiver of the present invention, MUSE
By being equipped with a scanning line number converter for converting signals into NTSC signals, high-definition television signals can be converted into NTSC signals.
It is a signal that can be converted into a C signal and output.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

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

In this figure, parts common to those in FIG. 2 are given the same reference numerals, and detailed explanations will be omitted. In the diagram, E is the external MUS
E signal input terminal, F is BS-IF double signal input terminal from BS antenna (not shown), G is UHF antenna or V
RF double signal input terminal from an HF antenna (not shown);
H is an input terminal for an external NTSC signal, 9 is a selector for switching between an external MUSE signal and an internal MUSE signal, and 10 is an input terminal for the BS-IF multiplied signal MUSE signal or baseband NTSC signal input through terminal F. A BS tuner section for demodulating; 11 a U/V tuner section for demodulating the RF multiplied signal input from terminal G into a baseband NTSC signal; 12 a BS tuner section 10;
This is a selector for outputting one of the baseband NTSC signals input from the U/V tuner section 11 or the input terminal, and 13 converts the number of scanning lines of a high-definition television signal to convert it into an NTSC signal. 2 is a scanning fiber number converter for converting the number of scanning lines, and (2) is an output terminal for connecting the NTSC signal outputted from the scanning line number converter 13 to an external device (VTR 4, NTSC monitor).

Next, the operation will be explained using FIG.

The MUSE signal is input to the selector 9 through the input terminal E, and the BSIF signal input through the input terminal F is input to the BS
The tuner unit 10 converts the signal into a MUSE signal, which is similarly input to the selector 9. Furthermore, the MtJSE decoder 1 converts the MUSE signal back into a high-definition television signal and outputs it as one input of the selector 7 in the same manner as in the conventional example. A high-definition television signal from the outside is inputted to the other input of the selector 7 through the input terminal A, one of which is selected by a control signal from the control section 4, and outputted to one input terminal of the selector 8. At the same time, it is output to the scanning line number converter 13.

On the other hand, the RF multiplied signal input from terminal G is demodulated into a baseband NTSC signal by the U/V tuner section 11,
It enters one input terminal of selector 12.

Further, an NTSC signal from the BS tuner unit 10 is input to another input of the selector 12, and an NTSC signal from the outside is input to another input through the terminal H. Then, one of these three signals is sent from the control unit 4 to flJ? The up-converter 2 doubles the number of scanning lines and the aspect converter 3 converts the horizontal scanning time so that the screen information can be displayed correctly. ,
Output to selector 8. Furthermore, the selector 8
The input high-definition television signal and the double-speed converted and aspect-converted NTSC signal are switched and outputted using a control signal from the control unit 4, and output to the high-definition television display 5. Project it.

On the other hand, from the selector 7, the scanning line number converter 13
The high-definition television join signal inputted to is converted by the scanning line number converter 13 into an NTSC signal with a different aspect ratio and number of scanning lines, and is ready to be connected to external equipment through the output terminal I.

As described above, according to the present invention, the BS tuner section and the U/V
By adding a scanning line number converter along with a tuner,
A single high-definition television receiver can display several high-definition television images and several current standard television images, and can also convert high-definition television images to current standard television. However, it is possible to provide a high-definition television receiver having a terminal capable of recording on the current standard television VTR, and it can be said that the invention has excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a high-definition television receiver according to an embodiment of the present invention, FIG. 2 is a schematic block diagram of a conventional high-definition television receiver, and FIG. 3 is a schematic block diagram of a conventional high-definition television receiver. It is a characteristic diagram when it is displayed on a display for quality television. 1... MUSE decoder section, 2... Up converter section, 3... Aspect conversion section,
4...Control unit, 5...High definition television display, IO...BS tuner unit, 11...U/V tuner unit, 13.
...Scanning line number converter. Kasumizu diagram (αn)

Claims (1)

[Claims] A MUSE decoder unit receives a high-definition television signal that transmits one image divided into four times and displays it on a high-definition television display, and a MUSE decoder unit that receives the current standard television signal and transmits the scan line. and an aspect conversion unit for converting the horizontal scanning time of the NTSC signal double-speed converted by the up-converter unit and displaying full-screen information on a high-definition television display. A high-definition television receiver equipped with a scanning line number conversion circuit for converting a high-definition television signal into a current standard television signal with a different aspect ratio and number of scanning lines, A high-definition television receiver equipped with an output function for converting the signal into a standard television signal and recording it on a VTR for current standard television signals.