JPS61141293A - On-vehicle video system - Google Patents

Abstract

PURPOSE:To clarify an image region to be closely observed at each point of the image and to reproduce on the picture the sign which is interlocked with the driving operation of the vehicle by connecting a sign generator to an image processing circuit for multi-image generation. CONSTITUTION:2 image signals from television cameras 5 and 6 are inputted to the image generating device 1. By means of digital processing and by line memory, the 2 image signals are made generate the analogue signal that is able to be reproduced as a multi-image on the 3:8 angle-of-view monitor. The output of the signal is inputted to a 3:8 angle-of-view monitor 2. In the left half of the monitor 2, the image from the camera 5 is reproduced, and in the right half, that from the camera 6 is reproduced. In case a right turn is indicated by the automovile direction indicator S2 of a switch 7 interlocked with the operation turns on. In such a way, the frame signal to reproduce a sign 3 on the monitor 2, is outputted by the sign generator 4. The frame signal is inputted to the circuit 1, multiplexed with the input signal of the camera 6, and is processed by digital processing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an on-vehicle video device installed in a large vehicle.

2. Description of the Related Art Currently, in-vehicle surveillance cameras are installed on the back of large buses, etc., and a method is used in which the camera monitors the background screen when the vehicle is backed up.

In addition, surveillance cameras themselves have become smaller and lighter due to advances in sensors themselves, and at the same time, their vibration resistance and lifespan have also been improved, making it possible to consider system configurations that use multiple cameras in various aspects. There is one.

Problems to be Solved by the Invention However, there are currently no in-vehicle video systems that play multiple images at the same time. (Only a simple system is used for in-vehicle use.) Also, there is no system that integrates images and driving operations.

In view of the above-mentioned drawbacks, the present invention installs cameras facing backward on the left and right sides of the vehicle body, and reproduces the plurality of reproduced images from the center to the left and right on one monitor. When the driver gives this signal, a flashing mark will appear on the left half of the screen in conjunction with this, allowing the driver to more accurately check the image to prevent motorbikes from getting caught. It has been made possible.

Means for Solving the Problems In the present invention, the sign signals for the necessary images are multiplexed in the two-screen processing circuit system of the image processing device mounted on the vehicle, and reproduced on the multi-images, and the sign signal is generated by the vehicle. This is done with a switch in conjunction with the operation of the direction indicator lever.

Signs include a black and white blinking square in one corner of the screen, multiple playback arrows, or surrounding the required screen with a black and white blinking frame.

According to the above-mentioned configuration, the present invention allows the in-vehicle video system to check the surrounding conditions while driving a car, and at the same time indicates on the image the area to be checked when turning left, turning right, or reversing, thereby enhancing the functionality of the system. This results in

Embodiment FIG. 1 is a block diagram of an in-vehicle video system according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a single-image or multi-image image processing circuit into which only the television camera 5 or 6 or two images can be input at the same time, the detailed configuration of which will be described later. Note that television cameras 5.6 are provided on the left and right sides of the vehicle body, facing toward the rear.

2 is a 3:8 viewing angle television receiver, 3 is a confirmation area sign reproduced multiplexed on the same viewing angle television, 4 is a sign generator, and 7 is a switch that opens and closes in conjunction with the operation of the automobile direction indicator.

The operation of the above configuration will be explained below.

In FIG. 1, two image signals are input to the image generating device 1 from television cameras 6 and 6. , these two image signals are used to generate analog signals that can be reproduced as multi-images on a 328-view angle monitor using digital signal processing and a line memory circuit.

The output signal is input to a 3:8 view angle monitor 2. If both cameras A and B are input to the image processing circuit, the image of camera A is reproduced on the left of the monitor 2, and the image of camera B is reproduced on the right.

When a right turn sign is issued by the automobile direction indicator, the switch 82 of the switch 7 linked to this is turned ON. As a result, the sign generator 4 outputs a frame signal such that the sign 3 is reproduced on the monitor 2. This frame signal is input to the image processing circuit 1, multiplexed with the input signal of the camera 6, and subjected to digital signal processing.

Note that the sign 3 may be in the form of an arrow as shown in FIG. 2, and this sign may be displayed continuously or blinking.

Further, if only camera A is being reproduced on the monitor 2, the signature format shown in FIG. 2 may be used.

As described above, according to this embodiment, by providing the sine generator 4° switch 7 shown in FIG. 1 and connecting it to the image processing circuit 1, confirmation on the reproduced image using the in-vehicle video system becomes easy.

Next, the image processing circuit 1 will be explained with reference to FIG.

FIG. 3 shows a block configuration of the image processing circuit 1 in one embodiment of the present invention.

In FIG. 3, 31 is analog image information A1 sent from the television camera 5 or the sign generator 4.
An analog/digital converter (hereinafter abbreviated as A/D converter 1) converts the image into 8-bit digital image information A2, and 32 is analog image information B1 sent from the television camera 6 or the sign generator 4. This is an analog/digital converter (hereinafter abbreviated as A/D converter 2) that converts the image data into 8-bit digital image information B2. 33 is digital image information A2 sent out from the A/D converter 31
, and the internal OR circuit receives the control signal T1 . of the timing control circuit 42 . T2 alternately turns on and off. 34 is a switch circuit that inputs the digital image B2 sent from the A/D converter 32, and an internal OR circuit receives the control signal T3. T4 alternately turns on and off. 35
and 36 is an A/D converter 31 via a switch circuit 33.
Digital image information sent from A3. A4 is a line memory that stores control signals T5 . Controlled by T6, output is performed at twice the writing speed. 37 and 38 are digital image information B3.3 sent out from the A/D converter 32 via the switch circuit 34. In the line memory that stores B4,
Control signals sent out by the timing control circuit 42, respectively.
71"8, and outputs at twice the writing speed. 39 is an adder that outputs digital image information B3 sent out by the line memory 37 after digital image information A3 sent out by the line memory 35; 4o; 41 is an adder that outputs the digital image information B4 that the line memory 38 sends out after the digital image information A4 that the line memory 36 sends out, and 41 is an adder that outputs the output of the adder 4o after the output of the adder 39. be.

The operation of the above configuration will be explained below with reference to FIG.

FIG. 4 is an explanatory diagram when two 3:4 view angle images are displayed simultaneously in the horizontal direction on a 328 view angle image reproducing display device using the signal processing according to the present embodiment.

In the figure, it is assumed that images A and B, which are converted to .PHI. by the A/exchangers 31 and 32, are all composed of scanning line image signals generated by a Japanese standard television camera.

Image A in figure a starts from the first scanning line 1' and 2
/, 3 /, . . . are sequentially scanned in even or odd fields, and about one line constitutes one screen.

Similarly, image B in the figure starts from the first scanning line 1 and is sequentially scanned as 2", 3", . . . .

In this case, it is assumed that images A and B are sequentially scanned using the same synchronizing signal pulse, and both screens maintain synchronization.

First, the line scanning signals of the images A and B from the television cameras 5 and 6 or the minister's office 4 are individually sent to A/D converters 31 and 32.
is converted into a digital signal once.

Note that the superposition of the television camera 5 or 6 and the sign generator 4 is omitted.

The first scanning line 1' of image A is then sent to the A/D converter 31.
1 to 8-bit digital image information A2, the image information, which is an odd-numbered scanning signal, is stored via the switch circuit 33 in the line memory 35 for each pixel during the period from the beginning to the end of the first scanning. be done.

The first scanning line 1''7'''' is synchronized with digital image information A3.
The digital image information B3 is also transmitted via the switch circuit 34 to the first
It is stored in the line memory 37 by the time the scanning is completed.

Next, a second scanning period begins. At this time, the second scanning line signal 2' of image A and the 2' scanning line signal of image B are sent to the A/D converter 31.
32, the 8-bit digital image information A2 and B2 are transferred to the line memory 36 via the switch circuit blade outside the digital image information A, and the digital image information B2 is transferred to the line memory 3 via the switch circuit 4.
8, each pixel is stored as digital image information B4.

On each side, digital image information A2 and B2 are stored in 7 line memory 36.
．． 38 and are sequentially read out during the second scanning period.

That is, the line-scanning digital image information A3 corresponding to image A is read out from the first line memory 36 in the first half of the second scanning period, and the line-scanning digital image information A3 from the line memory 37 for image B is read out in the second half. It will be done.

Above two digital image information A3. B3 is output via an adder 39.degree. 41. After being subjected to -Uμ conversion, this output signal becomes the scanning line image signal signal of the 3:8 image reproduction display device shown in FIG. 2C. This corresponds to the first scanning line 1'.

Note that the scanning line 1 scans at a cycle of 15.75 KHz, and the read clock frequency from the line memories 36 to 38 is twice the clock frequency at the time of storage, but data is read out from the line memories 35 to 38 intermittently. The images may be reproduced so that two screens are lined up in one scanning period.

Next, the third scanning signals of images A and B from the television camera are subjected to A/D conversion by A/D converters 1 and 2, and become digital image information A2 and B2.
5.37.

At the same time, data from the line memory 6 in the first half of the -scanning period and data from the line memory 38 in the second half are sequentially read out from the line memorandum IJs 36 and 38, and are outputted via adders 40 and 41.

This output signal, like the output of the adder 39 described above, becomes a two-screen image signal corresponding to the second scanning line 2' of the monitor 2 in FIG. 4 after being converted once.

Thereafter, scanning for one screen continues in the same manner, and the image is reproduced.

When playing two screens of images A and H at the same time horizontally like this,
In particular, multiple images can be realized using only four sets of line memories 35 to 38 without using field memory circuits for two screens.

Effects of the Invention As described above, in the present invention, by connecting a sign generator to an image processing circuit for generating multi-images, (1) the image area to be watched at each point on the multi-image becomes clear;

(2) Since a sign linked to the driving operation of the vehicle is reproduced on the image, driving confirmation can be performed without mistaking the image.

etc. The effect is great.

[Brief explanation of the drawing]

Fig. 1 is a block wiring diagram of an in-vehicle video device according to an embodiment of the present invention, Figs. 2 and 4 are conceptual diagrams of a monitor of the same device, and Fig. 3 is a block wiring diagram of an image processing circuit of the same device. be. 1... Image processing circuit, 2... Monitor,
4... Sign generator, 6, 6... Camera, 7... Switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4 (QJ (b) (C)

Claims (2)

[Claims] (1) At least two or more surveillance cameras installed on the vehicle body, a single or combined image processing circuit that inputs the surveillance camera playback image and reproduces it on the playback monitor display area, and a vehicle driving direction indicator, or An in-vehicle video device is provided with a switch that operates in conjunction with a corresponding operating element, and performs multiple playback of a specific image section on the screen of the playback monitor by continuously or blinking a gaze sign. (2) The serial video device according to claim 1, wherein the surveillance cameras are provided on the rear left and right sides of the vehicle body.