JPH03184495A - Stereoscopic picture displaying system - Google Patents

Abstract

PURPOSE:To reduce the number of PLL loops to one and to suppress the increase of circuit scale by allocating right and left pictures to the display of 4:2 interlace scanning when displaying a stereoscopic picture. CONSTITUTION:Right and left camera signals are respectively inputted to double speed converters 1 and 2 by a clock CKi and read out by an output clock CKo while changing the speed double. Corresponding to a field on the display dise, the signals are displayed while being changed over by a switch SW. A synchronizing signal on a camera side is inputted to a PLL circuit 3 and a clock CK synchronized with the horizontal synchronizing signal of a camera and horizontal and vertical synchronizing signals for 120MHz 4:2 interlace are outputted. The CK as the output of the PLL circuit 3 is used as the output clock CKo of the double speed converters 1 and 2 as it is and used as the input clock CKi while making the rate 1/2. Therefore, the input and output clocks can be generated by one PLL circuit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display method for a binocular fusion type time-series stereoscopic display device that displays left and right images in time-series on one display.

[Summary of the Invention] The present invention relates to a stereoscopic image display method featuring a scanning method for a binocular fusion type time-series stereoscopic display device, and displays left and right images at a ratio of 4:2, thereby reducing image quality deterioration. Therefore, the circuit configuration of the conversion circuit can be simplified.

[Prior art] In the conventional binocular fusion time-series stereoscopic display method, the NHK Laboratories Note (LABORATORI ESNO)
A 4:1 display system was used as disclosed in TE) No. 364.

However, the conventional 4:1 display type requires two PLL circuits (synchronized playback circuits) when converting from a camera signal, making the circuit complex. However, this method has the disadvantage that a disturbance (line crawling) occurs in which the scanning lines appear to flow up and down.

Therefore, an object of the present invention is to provide a display method that enables good stereoscopic image display without increasing the circuit scale.

[Means for Solving the Problems] The present invention provides a method for scanning each field in a time-series stereoscopic display device that displays left and right images in time series on a single display device. 3 As the fourth field,
The first third and second fourth fields are 2:1 inklace, the first second and third fourth fields are 4:2 interlaced in the same phase, and the converted left and right images are each p'' 7 Shiichi to Matsukami γ de T7 + y - Heshi 1. Tea lack/yffi1 Jimei fJsProblem to be solved j If the fields are R1, R2, L1, L2, 4:
R1, L1, R2, L2 or L1, R1, L2 in the first, second, third, and fourth fields of 2 ink races, respectively.
．． This is characterized by assigning R2.

[Function 1] In the present invention, when displaying a stereoscopic image, by assigning left and right images to a 4:2 interlaced scan display, conversion display can be performed without deteriorating the image quality and without increasing the circuit scale. I can do it.

[Example 1 Next, one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 shows the left and right 2 in 4:2 interlaced scanning.
=1 Indicates the relationship between the image of the ink race camera and the displayed image.

Chiku 2 Group and Ju-9.1-/Sotaley 1 KaJ Uwaka P4:2
The phase relationship of horizontal and vertical synchronization in interlaced display scanning is shown.

FIG. 3 shows the system of the conversion circuit from 2:1 interlace scanning to 4=2 inclace scanning. In FIG. 3, the right camera signal and the left camera signal are respectively input to speed converters 1 and 2 using an input clock CKi, and the speed is doubled and read out using an output clock CKo. The display will be switched depending on the situation.

The camera-side synchronization signal shown in Fig. 3 is input to a PLL (phase-locked loop) circuit 3, which outputs a clock CK synchronized with the camera's horizontal synchronization signal and horizontal and vertical synchronization signals for 120Hz 4:2 interlacing. Ru. Also,
GK of the output of PLL circuit 3 is directly connected to double speed converter 1.2
The output clock CKo is used as the output clock CKo, and the rate is halved and used as the input clock CKi. In other words, input/output clock generation is performed by one PLL circuit 3.
It can be done with Note that the 120Hz 4:2 interlace PLL circuit 3 can generate horizontal and vertical synchronizing signals by appropriately using a ROM, etc., as is the case with the conventional circuit. The phase relationship is as shown in FIG. 2, and the screen displayed as a result follows FIG.

[Effect of the invention 1 As described above, the conversion circuit for carrying out the present invention requires only one PLL loop, but if a 4:l interlace is used, for example, the above-mentioned NHK Laboratories Note No. 364 As shown in , when the original camera has 525 scanning lines, the clock is 8Fsc.
(8x subcarriers) * (1049/1050)
Since it requires an 8Fsc clock for output and input, two sets of PLL circuits are required. In this way, in the 4:2 increment system of the present invention, only one PLL loop is required as described above, and therefore, an increase in circuit scale can be suppressed.

Furthermore, as shown in FIG. 4, the 4:2 interlace system according to the present invention basically has the same structure as the 2:1 interlace system, so the line crawling is 4:2 interlace system.
It has the effect of being smaller than the one-interlace method.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the relationship between the images of the left and right 2=1 interlace cameras and the displayed image in 4:2 ink race scanning to which the present invention is applied, and Fig. 2 shows the relationship between the output of the 2:1 interlace camera and the 4:1 interlace camera output. Figure 3 is a block diagram showing the system of the conversion circuit from 2:1 interlaced scanning to 4:2 interlaced scanning. Figure 4 is a diagram showing the phase relationship of horizontal and vertical synchronization in 2:2 interlaced display scanning. 2 is a diagram showing the position of scan lines in the vertical time plane for 4:2 interlace and 2:1 interlace; FIG. 1.2... Double speed converter, 3... PLL circuit. Vertical direction No. 4 Vertical direction view

Claims (1)

[Claims] 1) When scanning a binocular fusion type time-series stereoscopic display device that displays left and right images in time-series on one display, each field is defined as a first, second, third, and fourth field. , the first third and second fourth fields are 2:1 interlace, the first second and third fourth fields are 4:2 interlaced in the same phase, and the converted left and right images are respectively R frame and L frame, and each field is R1, R2, L1, L2
In this case, a stereoscopic image display method is characterized in that R1, L1, R2, and L2 or L1, R1, L2, and R2 are assigned to the first, second, third, and fourth fields of 4:2 interlace, respectively. 2) A 2:1 interlace left and right image converted from a 2:1 interlace camera or a sequential camera is used as the converted left and right images.
The stereoscopic image display method described in . 3) When obtaining the converted left and right images, the left and right images are not interlaced 2:1, and the conversion is performed by regarding the output of the sequential scanning camera as R1R2 and L1L2 fields every other line. The stereoscopic image display method according to claim 1. 4) In the binocular fusion type time-series stereoscopic display device, left and right images are displayed to the left and right eyes of the observer according to the first, second, third, and fourth fields using glasses using optical shutters such as liquid crystals. The stereoscopic image display method according to claim 1, characterized in that the three-dimensional image display method is switched. 5) The stereoscopic image display method according to claim 1, wherein the display unit of the binocular fusion type time-series stereoscopic display device is provided with a polarization switcher that switches the polarization direction of the light output according to the left and right images. .