JPH06350978A - Video signal converter - Google Patents

Abstract

PURPOSE:To provide a video signal converter for automatically discriminating input signals, converting them to normalized video signals and also automatically performing display in a display mode specified beforehand by the input signals. CONSTITUTION:Optional input signals are discriminated in an input signal information extraction part 3a and the discrimination information is sent out to a system control part 3c. The system control part 3c reads data from a data storage part 3d for judging the input signals based on the discrimination information so as to perform conversion corresponding to the input signals, reads the data for performing the display mode corresponding to the input signals from a respective setting condition storage part 3e and controls a video conversion circuit part 3b. Then, the conversion to the normalized video signals is performed corresponding to the input signals and also the display is automatically performed in the display mode specified beforehand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is adapted to convert various video signals of a computer or the like into video signals (for example, NTSC standard signal, high-definition signal, etc.) in accordance with a specific broadcasting standard and display them. The present invention relates to a video signal conversion device.

[0002]

2. Description of the Related Art Conventionally, so-called multi-scan type television monitors have been developed which can display various video signals such as various computer video signals and television broadcast signals on one monitor. (For example, "National Technical
Report "Vol.34, No.5, October 1988 issue, P15-P20) And, the video signals input to these multi-scan monitors are various types of signals, such as horizontal frequency, vertical frequency, and synchronization. Different in signal polarity.

Therefore, in order to deal with these various input signals, the user must judge the input signals one by one and adjust them so that the horizontal and vertical frequencies of the monitor and the polarities of the synchronizing signals are matched. It was

In order to solve this, the horizontal frequency, vertical frequency and sync signal polarity of each model are stored in advance in a non-volatile memory, and the horizontal frequency, vertical frequency and sync signal polarity of the input signal are stored. It has been proposed to automatically discriminate the data from the non-volatile memory by the discrimination output and automatically adjust the monitor based on the data read from the nonvolatile memory. The circuit has, for example, a configuration as shown in FIG.

The circuit of FIG. 4 will be described. Reference numeral 1 is a video signal generator, 3 is a video signal converter, and 4 is a display monitor, which is a high-definition monitor in this example. 2 is a device control means for controlling from outside the video signal converting device 3.

The video signal converting device 3 includes an input signal information extracting section 3a for discriminating the video signal from the video signal generating section 1 and a video signal converting circuit section for converting the input signal into a standardized video signal. 3b (in this case, a video signal conversion circuit unit 3b for converting to a high-definition signal), a system control unit 3c for controlling the input signal information extraction unit 3a and the video signal conversion circuit unit 3b, horizontal frequencies of various input signals, The input signal determination data storage unit 3d includes a non-volatile memory that stores vertical frequency, number of scanning lines, sync signal polarity, scanning method, sync signal width, and the like.

Next, the operation will be described. Video signal generator 1
When various video signals are input from the input signal information extraction unit 3
At a, the horizontal frequency, vertical frequency, sync signal polarity, scanning method, and sync signal width are detected. Then, based on the detection information, the system control unit 3c reads out what matches the data stored in the input signal determination data storage unit 3d, and converts the input video signal into a high-definition video based on the read data. The system control unit 3c controls so that the signal conversion circuit unit 3b converts the signal. Then, the converted high-definition signal is displayed on the display monitor 4.

On the other hand, the device control means 2 enlarges the ratio, reduces the ratio, and color window (displays a back screen in color within a frame of one part. For example, a screen as shown in FIG. 3a). , Picture in picture,
A control signal is sent to the system control unit 3c to perform each control of the screen position control.

Based on this control signal, the system control section 3c controls the conversion in the video signal conversion circuit section 3b, and converts the input signal into an expanded signal if the expansion mode is designated. (For example, the sampling timing of the input signal, the sampling frequency, and the read timing of the memory (in the video conversion circuit unit 3b) are changed.) However, in the conventional method, the mode (enlargement, etc.) is predetermined according to the input signal. In such a case, the user has to specify the mode corresponding to each input signal each time the input signal is switched.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and automatically determines an input signal and converts the input signal into a standardized video signal, and the input signal is used in advance. An object of the present invention is to provide a video signal conversion device that is automatically displayed in a designated display mode.

[0011]

The present invention provides a horizontal frequency,
Video signals with different vertical frequency, number of scanning lines, scanning method, and sync signal polarity or width are arbitrarily input,
In a video signal converter for converting the input signal into a standardized video signal, an input signal discriminating means for discriminating the input video signal based on synchronization signal information from the input video signal, and an input video signal Input signal information storage means for storing the signal conversion information corresponding to the synchronization signal information and the input video signal, a mode storage means for storing the setting of the display mode for the input video signal, and the input video signal is standardized. Video signal conversion means for converting into a video signal and data corresponding to the input video signal based on the data from the input signal discrimination means are read from the input signal information storage means, and further read from the display mode storage means to convert the video signal. A video signal conversion device, comprising: a control unit that controls the means.

[0012]

With the above-described structure, the present invention automatically determines the input signal, performs the conversion according to the input signal, and sets the display mode according to the input signal. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of the present invention, and FIG. 2 is a flow chart showing its operation.

Next, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, the same circuits as those of FIG. 4 of the prior art are designated by the same reference numerals, and the description thereof will be omitted. The change in FIG. 1 is that the video signal converter 3 is provided with an individual setting condition storage unit 3e.

The individual setting condition storage unit 3e stores various controls such as a video signal enlargement ratio, a reduction ratio, a color window mode, a picture-in-picture mode, and a screen position control according to an input signal. This is for the user to previously store a desired mode in the individual setting condition storage unit 3e in accordance with the input signal.

Next, the operation of the present invention will be described with reference to the flow chart of FIG. When the input signal is switched (S1), the discrimination information is extracted from the input signal by the input signal information extraction unit 3a to discriminate the input signal. (S2, S3) Then, if the input signal is the same as the previous input signal determination data, it is left as it is, and if it is not the same (S4), the data is read from the input signal determination data storage section 3d,
The setting of the video signal conversion circuit section 3b is also changed. (S5) Further, since the control mode is switched to the one corresponding to the input signal due to the switching of the input signal, the setting condition is read from the individual setting condition storage unit 3e and displayed in the set mode. (S7) At this time, if there is no individual condition setting data, the video signal converted into the high-definition signal is displayed as it is.
(S6) The individual setting conditions are, for example, as shown in FIG. 3a in the color window mode, as shown in FIG. 3b in the position movement control, and as shown in FIG. 3c in the enlargement mode.

When there are a plurality of data having individual setting conditions with the same input signal, priority is given to the individual condition data in the head, that is, in the data input order (or, conversely, the latest input data order). You can solve it.

[0018]

As described above, according to the present invention, various individual setting conditions of the video signal output from the video signal converting device are set to the setting conditions desired by the user for each different input video signal. It is set automatically.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

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

FIG. 4 is a conventional system block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 video signal generation unit 2 device control means 3 video signal conversion device 3a input signal information extraction unit 3b video signal conversion circuit unit 3c system control unit 3d input signal determination data storage unit 3e individual setting condition storage unit 4 display monitor

Claims (2)

[Claims] 1. A video signal having different horizontal frequency, vertical frequency, number of scanning lines, scanning method, and sync signal polarity and width is arbitrarily input, and the input signal is converted into a standardized video signal. In the video signal conversion device for performing the above, the input signal discriminating means for discriminating the input video signal based on the synchronization signal information from the input video signal, and the synchronization signal information and the input video signal from the input video signal Input signal information storage means for storing corresponding signal conversion information, mode storage means for storing display mode settings for the input video signal, and video signal conversion for converting the input video signal into a standardized video signal Means for reading the data corresponding to the input video signal from the input signal information storage means based on the data from the input signal determination means, and further, the display mode Read from 憶 means, video signal converting apparatus characterized by comprising a control unit for controlling the video signal converting means. 2. The video signal conversion apparatus according to claim 1, wherein the video conversion circuit means is adapted to perform conversion in accordance with the standard of a high-definition signal.