JPS61267469A - Output device - Google Patents

Abstract

PURPOSE:To output a television signal as a visible image whatever signal out of plural kinds of television signal different in the number of scanning lines and aspect ratio is inputted, by providing an input means which can input the first and the second television signals, a scanning line number converting means, and a means which switches the scanning speed in an output means. CONSTITUTION:The number of scanning lines of signals Rn, Gn, and Bn outputted from a decoder 2 is allowed to coincide with that of a high definition television signal (HD) by a number of scanning line converting circuit 3. A switch circuit 6 outputs signals Rn, Gn, and Bn or signals Rh, Gh, and Bh in accordance with the output of a mode switching circuit 10 and supplies them to an image receiving tube 8. Since they are different in horizontal scanning frequency, the center frequency of a control oscillator in a horizontal AFC circuit 16 is switched by a switch 21. Though deflecting coils 19 and 20 are driven by output signals of deflecting circuits 15 and 17, the voltage of the horizontal deflecting circuit 17 is switched by a switch 22 because NTSC and HD signals are different in aspect ratio. The output of the horizontal deflecting circuit 17 is supplied to a high voltage circuit 18 for driving the image receiving tube, and thus, pictures corresponding to HD and NTSC signals are displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an output device, and particularly to an output device for outputting a video signal as a visible image.

<Summary of the Disclosure> This specification and the drawings have the number of scanning lines approximately equal to the predetermined number of scanning lines, regardless of which of the first and second television signals having different numbers of scanning lines and aspect ratios are input. By providing a means for outputting a video signal and switching the scanning speed of the output means for outputting the video signal as a visible image, it is possible to control which of multiple types of television signals having different numbers of scanning lines and aspect ratios are input. also discloses a technique for providing an output device capable of outputting a visible image.

<Prior Art> Examples of this type of output device include a video monitor device, a video printer device, and the like. These devices were generally constructed in accordance with a particular television signal.

<Problems to be Solved by the Invention> By the way, in order to output a conventional 2's type television signal as a visible image, it is necessary to prepare two output devices. Therefore, even if so-called high-definition television broadcasting is realized, for example, if you do not have a receiver for standard television signals such as NT8C signals and a receiver for high-definition television signals (HD), you will not be able to use these. It is not possible to receive double-tier O broadcasts, which impedes the spread of HD receiver aircraft and, by extension, the spread of high-definition television broadcasts.

The present invention has been made in view of the problems typified by the above, and it is possible to output any of a plurality of types of television signals having different numbers of scanning lines and aspect ratios as a visible image, no matter which one is input. The purpose is to provide a versatile output device.

Means for Solving the Problems In view of the problems described above, the output device of the present invention is capable of inputting first and second television signals having different numbers of scanning lines and different aspect ratios. an input means; a scanning line number converting means for outputting a video signal having a number of scanning lines approximately equal to a predetermined number of scanning lines regardless of which of the first and second television signals is input; An output means for outputting a video signal of the number of scanning lines as a visible image, and means for switching the scanning speed of the output means are provided.

By configuring as described above, it is possible to tolerate differences in the number of scanning lines and aspect ratios between multiple types of television signals during output, and the visible image can be maintained regardless of which of these is input. The output is now colored.

<Example> Hereinafter, an example in which the present invention is applied to a television receiver will be described. FIG. 1 is a diagram showing a receiver as an embodiment of the present sailing. In FIG. 1, 1 is an NTBO receiving section consisting of a tuner, an amplifier, etc., and outputs luminance information Yn, color information an, and composite synchronization signal C8n. Decoder 2 is Y
In response to n, On, three primary color signals Rn compatible with NT80,
It is for outputting Gn and Bn and includes a one-color demodulation circuit, a one-color synchronization circuit, a matrix circuit, etc. the other 111D
Similar signal processing is performed in the receiving section 4 and decoder 5, and the decoder 5 outputs HD compatible three primary color signals R11, Gh,
Bh is output. Rn output from decoder 2,
Gn.

Bn is the number of scanning lines of the HD in the scanning line number conversion circuit 3.
The vertical scanning frequency of H2 is 59.94 KHz, and the horizontal scanning frequency of H2 is 31.47 KHz, which is almost the same as the vertical scanning frequency of 60 Hz for Rh, Gh, and Bh, and about 7% of the horizontal scanning frequency of 35.75 KHz. There is a difference.

In the switch circuit 13, the synchronization signals Hn (horizontal) and Vn of the NTSC signal are separated by the synchronization separation circuits 11 and 12.
(vertical) and HD O synchronization signal Hh (horizontal), vh
(vertical) and alternatively vertical 110 circuits 14, horizontal AFC
Output to i circuit 16. This switching is done by the mode switching circuit 10.
This is done by the output of Further, as mentioned above, since there is a difference of about 7% in the horizontal scanning frequency, the center frequency of the control oscillator in the horizontal AFO circuit 16 is switched by the switch 21. The vertical synchronizing signal output from the vertical AFO circuit 14 is supplied to the vertical deflection circuit 15, and the horizontal synchronizing signal output from the horizontal AFC circuit 16 is supplied to the horizontal deflection circuit 17.
supplied to Deflection coils 19 and 20 are driven by the output signals of these deflection circuits 15 and 17, and the aspect ratio is NTSC! Since this is different between HD and HD, the voltage (peak voltage) of the horizontal deflection circuit is changed over by the switch 22.

This situation is shown in FIG. In FIG. 3, Hh is the horizontal synchronization signal by HD, and Hn/ is N'rSC! (has twice the frequency of the horizontal synchronization signal of the original NT80 signal), sh is a horizontal deflection signal for HD, and Sn is a horizontal deflection signal for NTSG. As shown in the figure, the peak voltage (Vp) of 8n is %(
Vp). Therefore, HD is displayed on the playback screen in FIG. 4 as AI, A2. It is displayed using the entire area of A5, and NTBC No. 9 is displayed using A2. That is, the scanning speed is switched by the horizontal deflection circuit 17 and switch 22.

The output of the horizontal deflection circuit 17 is also supplied to a high voltage circuit 18 for driving the tube, and images corresponding to HD and MTSG signals are displayed by these circuits. ◎ Fig. 5 shows another embodiment of the present invention. This is a diagram for explaining an example, and shows another example of the scanning line number conversion circuit 3 in FIG. Components in FIG. 5 that are similar to those in FIG. 2 are given the same numbers.

The output of the switch S6 is supplied to the time axis compression circuit 45.
The time axis is compressed by % for each horizontal scanning period, and the blank portion is replaced with a specified video signal. The regulation signal generation circuit 46 generates a video signal corresponding to the color blue, for example, and this signal can be selected from the video signal output from the time axis compression circuit 45 by switching the switch 48 based on the output of the timing signal generation circuit 47. It is output uniformly. This time axis compression circuit 45 changes the deflection speed, that is, the scanning speed. Although the time axis compression circuit 45 is constructed as a separate block for ease of explanation, it can be easily realized by switching the reading speed of the memos 1755 and 54.

It is desirable that this time-base compressed signal is output in the middle of the horizontal synchronizing signal Hn so as to correspond to the region A2 in FIG. As a result, A2 in Figure 4
A screen corresponding to the NT8C signal is displayed in the A1 area.
．． A screen corresponding to the specified signal is output in the area A3. In this case, of course, the horizontal deflection voltage changeover switch 22 shown in FIG. 1 becomes unnecessary.

Although the above-described embodiment has been explained using a consort aircraft as an example, the present invention can also be applied to a video printer or the like. In this case, the scanning speed may be changed by changing the dot spacing in the horizontal direction.

<Effects of the Invention> As explained above, according to the present invention, no matter which one of multiple types of television signals having different numbers of scanning lines and aspect ratios is input, it is possible to output it as a visible image. It is possible to obtain an output device that can perform

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of a receiver as an embodiment of the present invention, Fig. 2 is a diagram showing a specific example of the scanning line number conversion circuit in Fig. 1, and Fig. 6 is a diagram showing a horizontal deflection circuit. FIG. 4 is a waveform diagram showing the waveform of the signal, FIG. 4 is a diagram showing the area on the screen, and FIG. 5 is a diagram for explaining another embodiment of the present invention. 1 is an IT80 signal receiving section, 3 is a scanning line number conversion circuit, 4
Reference numeral 10 indicates an image receiving unit for high-definition television signals, 6 a switch circuit, 1o a mode switching circuit, 17 a horizontal deflection circuit, 22 a switch, 53 and 54 line memories, respectively, and 45 a time axis compression circuit. Punishment 1 Haze

Claims (1)

[Claims] The first and second scan lines have different numbers of scanning lines and different aspect ratios.
input means capable of inputting a television signal; and
and a second television signal, which outputs a video signal having a number of scanning lines approximately equal to a predetermined number of scanning lines, regardless of which one of the second television signals is input; An output device comprising an output means for outputting a visual image and a means for switching the scanning speed of the output means.