JP3271141B2 - Video signal processing device - Google Patents

Description

The present invention relates to a video signal processing suitable for selectively outputting a high image quality signal relating to a high number of scans and an area reduction signal generated based on the high image quality signal. Related to the device.

[Summary of the Invention]

The present invention is applied to, for example, displaying an image on a monitor of a high image quality signal related to a high scan number such as an HDTV (High Definition TV) and a monitor of an area reduction signal related to a low scan number such as an NTSC. The present invention relates to a preferable video signal processing device, wherein a high image quality signal generating means for outputting a high image quality signal, and a high image signal for outputting an area reduction signal obtained by reducing the high image quality information area signal included in the high image quality signal from the high image quality signal generating means. Image quality information area signal reduction means, switching means for selectively outputting the high quality signal output from the high quality signal generation means and the area reduction signal output from the high quality information area signal reduction means, By providing a common output terminal for outputting the high image quality signal or the area reduction signal selectively obtained from the switching means, a monitor connected to the common output terminal can be used to output a high image quality signal such as an HDTV. Even Waru monitor, also be a monitor area reduction signals such as NTSC, it is obtained as easily accommodated by the switching means.

[Conventional technology]

Recently, high-definition TV (Adventist TV), so-called NT
EDTV (Extended Definition T) to maintain compatibility with SC method
V, clear vision) or high-quality media such as HDTV is being used.

When a high-quality signal of progressive scanning (in interless) such as 525 TV lines related to this high-quality medium is displayed as an image,
A high image quality monitor equipped with a signal processing unit corresponding to the progressive scanning is used.

By the way, high-quality monitors are not commonly used in the current situation, and the odd and even lines each display video by the well-known interlaced scanning of 262.5 TV lines NTSC.
In many cases, the system monitor is diverted.

[Problems to be solved by the invention]

However, for example, when a high-quality signal output from a high-quality media video camera is input to an NTSC monitor,
Here, there is an inconvenience when the image is displayed. That is, not only the high-quality signal of the progressive scanning is displayed in the image by the well-known interlaced scanning, but also the image quality information area signal included in the high-quality signal, that is, the scanning signal between the scans in the conventional interlaced scanning is the same as that of the conventional interlaced scanning. The video portion, which has a higher level than the video signal output from the NTSC video camera and greatly changes the luminance between the sequential scans, is easily displayed as flicker. For this reason, there is a drawback that it is difficult to visually recognize a high-quality signal relating to a high-quality medium when displaying an image on an NTSC monitor that is frequently used in the current situation.

The present invention has been made in view of the above-described problems, and an object thereof is to simultaneously obtain a high-scanning-number high-quality signal and a low-scanning-number video signal. An object of the present invention is to provide an excellent video signal processing device that improves the image quality when displaying an image on an NTSC monitor or the like.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an imaging apparatus including the following means. That is, imaging means for outputting a high-quality signal with a high number of scans, high-quality information area signal reducing means for outputting a video signal in which the high-quality information area signal included in the high-quality signal from the imaging means is reduced, Switching means for switching and outputting the high-quality signal from the imaging means and the video signal from the high-quality information area reducing means; and an output terminal for outputting the video signal from the switching means. An imaging device is provided.

[Operation] According to the video signal processing apparatus of the present invention, the high image quality signal output from the high image quality signal generation means and the area reduction signal output from the high image quality information area signal reduction means are switched and selectively output. And a common output terminal for outputting a high image quality signal or an area reduction signal selectively obtained from the switching unit.
An example of a monitor corresponding to a high image quality signal is a monitor of a high image quality signal of a high scanning number such as an HDTV, and a monitor of an NTSC or the like is an example of a monitor corresponding to an area reduction signal output from the high image quality information area signal reduction means. Any of the monitors for the number of scans can be connected, and even if any of these monitors is connected, it can be dealt with by a simple operation simply by operating the switching means.

〔Example〕

Hereinafter, embodiments of the video signal processing device of the present invention will be described in detail with reference to the drawings.

First, in FIG. 1, (10) is an EDTV which is a conventional means.
Video camera for high-quality media according to the
2) shows a signal processing unit according to an embodiment of the video signal processing device of the present invention.

The high-quality media video camera (10) is a well-known video camera that derives a high-scanning high-quality signal Sa according to the EDTV system or the like. The high-quality signal Sa has, for example, a horizontal resolution of 525T.
This is a V signal, which is a video signal obtained by sequentially scanning an interlaced operation (26 / TV lines of 1/60 sec, odd and even lines) according to the NTSC system. The high quality signal Sa obtained from the high quality media video camera (10) is supplied to the input terminal Ti of the signal processing unit (12).

The high-quality signal Sa is directly output to the first output terminal Ta, and the high-quality signal Sa is further converted to a high-quality information area signal reduction processing unit (hereinafter, referred to as an area signal reduction processing unit) (1).
4), a high image quality information area reduction signal (hereinafter, referred to as an area reduction signal) Sb obtained by reducing the high image quality information area signal included in the high image quality signal Sa is output to the second output terminal Tb. It has been made like that.

As shown in FIG. 2, the area signal reduction processing section (14) sets one horizontal period of the high-quality information area signal included in the high-quality signal Sa supplied from the high-quality media video camera (10). The delayed signal Se is derived from a 1H delay circuit (20) using, for example, a CCD or an ultrasonic delay element, and the adder (22) adds the delayed signal Se and the high-quality signal Sa.
, And adds them, from which the area reduction signal Sb is output.

Next, FIG. 3 shows the configuration of another embodiment. Input terminal Ti
The high image quality signal Sa input to the
The area reduction signal Sb obtained from 4) and the switch (16)
Are supplied to the fixed contacts (16a) and (16b) of the movable contact (16a) and (16b), respectively.
c) selects either the high image quality signal Sa or the area reduction signal Sb and outputs it to the common output terminal Tc. The common output terminal Tc is connected to either a high-quality monitor or an NTSC monitor (not shown).

 Next, the operation in this configuration will be described.

The high-quality signal Sa output from the high-quality media video camera (10) according to the EDTV has, for example, a horizontal resolution of 525T.
V scans, interlaced scanning (1 / 60s
(ec, odd-numbered lines, even-numbered lines, 262.5 TV lines), a high-quality signal Sa is output by sequential scanning. The high image quality signal Sa is input to the area signal reduction processing section (14) via the input terminal Ti of the signal processing section (12), where the area reduction signal Sb is obtained. This area reduction signal Sb first has a value of 1H shown in FIG.
The high-quality signal Sa is input to the delay circuit (20), and here, a delayed signal Sb delayed by one horizontal period of the high-quality information area signal included in the high-quality signal Sa is output. Subsequently, the delay signal Sb is combined and added with the next horizontal signal in the high-quality signal Sa by the adder (22). Thereby, substantially one horizontal period of the high-quality information area signal included in the high-quality signal Sa is not derived, and, for example, in a continuous scanning line related to the sequential scanning of the high-quality signal Sa, the luminance difference is reduced. When the brightness is large, the brightness difference is averaged, and flicker is less likely to occur in the display image on the NTSC monitor. The area reduction signal Sb obtained in this manner is led out to the first and second output terminals Ta and Tb together with the high image quality signal Sa, and supplied to the high image quality monitor and the NTSC monitor connected thereto, respectively, to display the image. Is performed.

In FIG. 3, the high image quality signal Sa or the area reduction signal
Sb is also supplied to the fixed contacts (16a) (16b) of the switch (16). In this switch (16), based on the switching signal Sc, for example, a high-quality signal Sa or an area reduction signal Sb is shared by a single coaxial cable or the like to one of a high-quality monitor and an NTSC monitor arranged at a distance. It is switched when transmitting through the output terminal Tc. That is, the high image quality signal Sa is derived in the ON state where the movable contact (16c) and the fixed contact (16a) are connected, and the area reduction signal Sb is derived in the OFF state where the movable contact (16c) and the fixed contact (16b) are connected. Is done. In this way, the area reduction signal Sb in which one horizontal period is reduced in the high image quality information area signal included in the high image quality signal Sa is obtained from the second output terminal Tb or the common output terminal Tc. The image of the signal Sa is displayed on the high image quality monitor, and the image of the area reduction signal Sb can be displayed on the NTSC monitor or the like. At this time, flicker and the like are reduced in the NTSC monitor, and the quality of the displayed image is improved.

In the above embodiment, the 1H delay circuit (20) and the adder (22) are used in the area signal reduction processing unit (14).
It goes without saying that a low-pass filter (LPF) may be used instead.

It is apparent that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

〔The invention's effect〕

As can be understood from the above description, according to the video signal processing device of the present invention, the high image quality signal output from the high image quality signal generation unit and the area reduction signal output from the high image quality information area signal reduction unit are switched. And a common output terminal for selectively outputting a high image quality signal or an area reduction signal obtained from the switching means. The output terminal includes, for example, an HDTV or the like. Both a monitor for high image quality signals and a monitor for area reduction signals such as NTSC can be connected, and even if any of these monitors is connected, it can be handled by simply operating this switching means. There are advantages that can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a video signal processing apparatus according to the present invention, FIG. 2 is a block diagram showing a configuration of an area signal reduction processing section in the embodiment of FIG. 1, and FIG. FIG. 10 is a block diagram showing a configuration of another embodiment of the video signal processing device of FIG. (10) is a video camera for high-quality media, (12) is a signal processing unit, (14) is a high-quality information area signal reduction processing unit, (2)
0) is a 1H delay circuit, (22) is an adder, (16) is a switch, Sa is a high image quality signal, Sb is an area reduction signal, Se is a delay signal, Ta is a first output terminal, and Tb is a second output terminal. An output terminal, Tc is an output terminal, and Ti is an input terminal.

Claims (1)

(57) [Claims] 1. An imaging means for outputting a high-quality signal with a high number of scans, and a high-quality information area signal reducing means for outputting a video signal in which a high-quality information area signal included in the high-quality signal from the imaging means is reduced. Switching means for switching and outputting the high-quality signal from the imaging means, the video signal from the high-quality information area reducing means, and an output terminal for outputting the video signal from the switching means. An imaging device characterized by the above-mentioned.