JPH08182022A - Three dimensional video image transmitter - Google Patents

Abstract

PURPOSE: To obtain a transmitter improving deteriorated S/N at modulation by modulating and multiplexing two left/right systems of video signal, audio signal and synchronizing signal through one cable in the 3-dimensional television video signal transmitter. CONSTITUTION: An arithmetic processing section 2 is provided in a 3-dimensional video image transmitter 1, a video signal R of a right camera 3 and a video signal L of a left camera 4 are used to generate signals A=(L+R)/2 and B=(L-R)/2. A modulation section 5 multiplexes modulated base band signals A, B and the multiplexed signal is sent through one cable. Noise (n) at modulation is produced and the signal B becomes B=(L-R)/2+n. A demodulation section 6 demodulates the signals to obtain signals A, B. An arithmetic operation processing section 7 obtains signals L=A+B-n and R=A-B+n. A 3-dimensional device 8 mixes the video signal R of the right camera 3 and the video signal L of the left camera 4 on a display device 9 to cancel noise of a reverse code and to improve the S/N.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic video transmission device for modulating a video signal of a stereoscopic television and transmitting it by one cable.

[0002]

2. Description of the Related Art Conventionally, when transmitting a video signal of a stereoscopic television, as shown in FIG. 2, a method of transmitting two right and left video systems separately by two cables, and a method of modulating each and transmitting one video signal. There is a method of transmitting with a cable, and in the case of transmitting with a base band, an image with a good S / N can be transmitted, but at least two cables are required. Further, when each image is modulated and transmitted, there is S / N deterioration due to noise generation during modulation.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
If it is attempted to be modulated as it is for transmission with one cable, S / N deterioration occurs. It is an object of the present invention to provide a stereoscopic video transmission device in which S / N is improved by performing processing before modulation when transmitting a stereoscopic TV video signal through a single cable.

[0004]

In order to achieve the above object, the present invention takes the sum and difference of left and right video signals, one of which is baseband and the other is modulated and transmitted. If the baseband signal is A and the modulating signal is B, then A = (L + R) / 2, B = (LR) / 2 + n where L is the video signal of the left camera, R is the video signal of the right camera, n is noise at the time of modulation.

[0005]

To explain the operation of the present invention, the image signals L and R on the receiving side are L = A + B-n and R = A-B + n, respectively. As a result, the sign of noise is opposite between the video signals L and R on the receiving side, the noises are canceled on the display, and noise can be reduced when viewed as a stereoscopic image.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 is a stereoscopic video transmission device, 2 is an arithmetic processing unit (L +
R) / 2 and (LR) / 2 signals are generated. 3 is a right camera, 4 is a left camera, 5 is a modulation unit, 6 is a demodulation unit, 7 is an arithmetic processing unit, 8 is a stereoscopic device, 9 is a display, 10 is a liquid crystal shutter, and 11 is deflection glasses. Hereinafter, this operation will be described. In the arithmetic processing unit 2 in the stereoscopic video transmission device 1, the signals of (L + R) / 2 = A and (LR) / 2 = B are obtained from the video signal R of the right camera 3 and the video signal L of the left camera 4. appear. The baseband signals A and B in the modulator 5
The modulated signal is multiplexed and transmitted by one cable.

At that time, noise n at the time of modulation is generated, and B =
(LR) / 2 + n. The transmitted multiplexed signal is demodulated by the demodulator 6 to obtain A and B signals. The arithmetic processing unit 7 obtains L = A + B-n and R = A-B + n. The video signal R of the right camera 3 is output by the stereoscopic device 8.
The video signal L of the left camera 4 and the left camera 4 are mixed on the display 9, and the noise of the opposite sign is canceled and the S / N can be improved. The liquid crystal shutter 10 deflects each field, and the deflection glasses 11 separate the video signal R of the right camera 3 and the video signal L of the left camera 4 to supply the respective images to the left and right eyes of a human and display them stereoscopically. .

[0008]

As a stereoscopic image with less noise can be obtained with one cable, the existing camera can be easily replaced with a stereoscopic camera.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional system.

[Explanation of symbols]

 1 stereoscopic image transmission device 2 arithmetic processing unit 3 right camera 4 left camera 5 modulation unit 6 demodulation unit 7 arithmetic processing unit 8 stereoscopic device 9 display 10 liquid crystal shutter 11 deflection glasses

Claims (1)

[Claims] 1. In a video signal transmission device for a stereoscopic television, when left and right video signals are L and R respectively, L + R is an unmodulated base band and LR is modulated by a single cable. A stereoscopic video transmission device characterized by transmission.