JPS6382191A - Stereoscopic video signal processor - Google Patents

Abstract

PURPOSE:To form a stereoscopic video signal by applying digital processing to one video signal of asynchronous left and right eye video signals and giving the result to a field switching circuit in the timing deviated corresponding to the pahse shift of the vertical synchronizing signal of both the video signals. CONSTITUTION:In giving both left/right video signals to a timing generation circuit 9, the deviation of the phase of the vertical synchronizing signals of both the video signals is detected and write/read control is applied so as to give the right eye video signal to a field switching circuit 10 in the timing retarded by the left eye video signal by a period (t) corresponding to the deviation. The field switching control circuit 10 switches the left eye video signal from a 1st input terminal 7 and the right eye video signal given via a low pass filter 18 alternately at each field based on the vertical synchronizing signal from the timing generating circuit 9 and outputs the result as a stereoscopic video signal from an output terminal 19. Furthermore, a switching signal of a shutter of a liquid crystal eyeglass 6 tuned to the field is outputted.

Description

Detailed Description of the Invention Technical Field The present invention relates to a stereoscopic video signal processing device that forms and outputs a stereoscopic video signal from left-eye and right-eye video signals provided from left-eye and right-eye cameras, respectively. .

<Prior art> Conventionally, as a stereoscopic image system using binocular parallax, an alternative method (A It
There is a native system. In this method, a left eye camera 31 and a right eye camera 32
The left eye video signal (left, ) ~ (left) and the right eye video signal (right a) ~ shown in Figure 5 (AXB).
(right f) is synchronously provided to the stereoscopic video signal processing device 35. The stereoscopic video signal processing device 35 includes a field discrimination circuit 33 and a switching circuit 34. The field discrimination circuit 33 discriminates the field, and based on this,
The switching circuit 35 switches the left eye video signal and the right eye video signal into one
For each field, the three-dimensional video signals shown in FIG. Output. The viewer views the left and right images alternately displayed on the monitor 37 stereoscopically through liquid crystal glasses 38 whose left and right lens sections alternately open and close the shutter in synchronization with the field.

In such a conventional 3D video signal processing device, a 3D video signal is formed by alternately switching the left eye video signal and the right eye video signal for each field, so both video signals are provided synchronously. However, in the case of an asynchronous state, it is difficult to form a stereoscopic video signal.

<Object of the Invention> The present invention has been made in view of the above points, and provides a stereoscopic video signal that can form a stereoscopic video signal based on an asynchronous left-eye video signal and a right-eye video signal. The purpose of the present invention is to provide a signal processing device.

<Configuration of the Invention> In order to achieve the above-mentioned object, the present invention provides a stereoscopic video signal processing device that forms and outputs a stereoscopic video signal from an asynchronous left-eye video signal and a right-eye video signal. Output means for outputting one of the video signal and the right eye video signal at a timing shifted from the other video signal by a period corresponding to the phase shift of the vertical synchronization signal; a field switching circuit that alternately switches the one video signal and the other video signal field by field and outputs the same as a stereoscopic video signal, and the output means converts the one video signal into a digital signal. /D converter, a memory into which a video signal converted to a digital signal is written or read, and a D converter that converts the video signal read from the memory into an analog signal.
/A converter.

According to the above configuration, one video signal is shifted from the other video signal by a period corresponding to the phase shift of the vertical synchronization signal and is applied to the field switching circuit. Both the left and right video signals are provided synchronously, and by alternately switching the two video signals for each field, it becomes possible to obtain a stereoscopic video signal.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of a stereoscopic video system according to an embodiment of the present invention, and FIG. 2 is a block diagram of the stereoscopic video signal processing device.

This stereoscopic video system forms a stereoscopic video signal based on a left eye camera 1, a right eye camera 2, and an asynchronous left eye video signal and right eye video signal from each camera 1.2. A stereoscopic video signal processing device 3 for outputting, a VTR for recording the stereoscopic video signal from the stereoscopic video signal processing device 3,
It is equipped with a monitor 5 that displays a stereoscopic image based on a stereoscopic image signal from a stereoscopic image signal processing device 3, and liquid crystal glasses 6 whose left and right lens sections alternately open and close the shutter in synchronization with the field.

ゝ The first part of the stereoscopic video signal processing device 3. Each second input terminal 7.8 is connected to each unsynchronized camera 1.2.
As shown in FIG. 3 (A XB),
Video signals for the left eye and right eye (left, ) to (left.).

(Right n) to (Right e) are each given asynchronously.

In this embodiment, the left-eye video signal and the right-eye video signal are out of phase in vertical synchronization signal by a period t.

The stereoscopic video signal processing device 3 of this embodiment handles the right eye video signal of the left eye video signal and the right eye video signal with respect to the phase shift of the vertical synchronization signal with respect to the left eye video signal. Output means 2 that outputs at a timing delayed by a period t
0, and a field switching circuit IO that alternately switches the right-eye video signal from the output means 20 and the left-eye video signal from the first input terminal 7 for each field and outputs it as a stereoscopic video signal. There is.

The right eye video signal at the second input terminal 8 is applied to the clamp circuit 11 of the output means 20 and is clamped.
/D converter 12 and converted into a digital video signal. This digital video resolution signal is converted into a serial signal by a parallel/serial converter, and the I10 port 14
is written to RAM+5 via. The digital video signal written in RAM+5 is read out based on the read clock from the timing generation circuit 9, converted into a parallel signal by a serial/parallel converter, and further converted into an analog signal by a D/A converter 17. The signal is converted into and applied to the field switching circuit 10 via the low-pass filter 18.

The timing generation circuit 9 controls writing and reading of the right eye video signal into the RAM+5.
The timing generation circuit 9 is supplied with both left and right video signals, detects a phase shift between the vertical synchronization signals of the two video signals, and generates a right-eye video signal for a period t corresponding to the shift. Writing and reading are controlled so that the signal is applied to the field switching circuit 10 at a timing later than that of the left eye video signal.

This RAM+5 has, for example, a capacity for two fields of video signals, and is configured to write one field's worth of right-eye video signals while reading out the right-eye video signal for one field. has been done.

In the output means 20, the video signal for the right eye is digitally processed in this way and is temporarily written into the RAM 1.
5 at a predetermined timing, the third
As shown in Figure (C), the signal is applied to the field switching circuit 10 at a timing synchronized with the left eye video signal.

In the field switching circuit IO, based on the vertical synchronization signal from the timing generation circuit 9, the left eye video signal shown in FIG. The video signal for the right eye shown in FIG. 3(C) is alternately switched for each field and output from the output terminal 19 as the stereoscopic video signal shown in FIG. 3(D).

Furthermore, this field switching circuit 1o outputs a switching signal for the shutter of the liquid crystal glasses 6 in synchronization with the field.

The viewer uses liquid crystal glasses 6 to stereoscopically view alternating left and right images displayed on the monitor 5 based on the stereoscopic video signal.

<Effects of the Invention> As described above, according to the present invention, one of the asynchronous left-eye and right-eye video signals is digitally processed to correct the phase shift of the vertical synchronization signal of both video signals. By supplying the video signals to the field switching circuit at timings shifted by a period corresponding to It becomes possible to obtain a stereoscopic video signal, and therefore, even if the left eye camera and the right eye camera are in an asynchronous state, it is possible to form a stereoscopic video signal based on the video signals from both cameras.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a stereoscopic video system according to an embodiment of the present invention, FIG. 2 is a block diagram of a stereoscopic video signal processing device of FIG. 1, and FIG. 3 is a video signal of the embodiment of FIG. 1. FIG. 4 is a schematic configuration diagram of a conventional three-dimensional video system, and FIG. 5 is a diagram showing a conventional video signal. 1... Left eye camera, 2... Right eye camera, 3... Stereoscopic video signal processing device, 10... Field switching circuit, 2
0...Output means.

Claims (1)

[Claims] (1) In a stereoscopic video signal processing device that forms and outputs a stereoscopic video signal from an asynchronous left-eye video signal and a right-eye video signal, one of the left-eye video signal and the right-eye video signal is processed. an output means for outputting the one video signal and the other video signal from the output means at a timing shifted by a period corresponding to the phase shift of the vertical synchronization signal with respect to the other video signal; and a field switching circuit that alternately switches between the two and outputs the three-dimensional video signal as a three-dimensional video signal, and the output means includes an A/D converter that converts one of the video signals into a digital signal, and a field switching circuit that outputs the video signal as a three-dimensional video signal. A three-dimensional video signal processing device comprising a memory into which data is written or read, and a D/A converter which converts a video signal read from the memory into an analog signal.