JPH05207377A - Television camera device - Google Patents

Abstract

PURPOSE:To cope with image pickup in plural television systems different by aspect ratios by one television camera device. CONSTITUTION:A CCD image pickup element 1 has a large number of elements, namely, 2000000 picture elements in total of 1035 picture elements in the vertical direction and 1920 picture elements in the horizontal direction in the effective image pickup area. A CCD driving part 2 scans picture elements in an image pickup area picked up in the effective image pickup area of the CCD image pickup element 1 in accordance with the television system. An unnecessary electric charge transfer part 3 transfers the unnecessary electric charge, which is stored in picture elements on the outside of the image pickup area, to the outside to remove it in the blanking period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera device, and more particularly to a television camera device having a CCD image pickup device.

[0002]

2. Description of the Related Art The aspect ratio, the number of effective scanning lines, etc. differ depending on the television system. That is, in the high definition system, the aspect ratio is 16: 9 and the number of effective scanning lines is 10
It is an interlaced scan with 35 lines and a field frequency of 60 Hz. In the second generation EDTV system, the aspect ratio is 16: 9, the number of effective scanning lines is 492, and the frame frequency is 3.
0 Hz non-interlaced scanning, and NTSC
In the method, the aspect ratio is 4: 3 and the number of effective scanning lines is 492.
This is an interlaced scan with a field frequency of 60 Hz.

Conventionally, a television camera device is selected and photographed according to each television system.

[0004]

As described above, according to the conventional television system, the corresponding television camera device is used to take an image. Therefore, a television camera device must be prepared for each television system, and there is a problem in that equipment costs are required because the television camera device is very expensive.

It is an object of the present invention to provide a television camera device capable of coping with a plurality of television system image pickups having different aspect ratios.

[0006]

A television camera device according to the present invention has a CCD image pickup device having a high number of pixels and pixels of an image pickup region picked up in an effective image pickup region of the CCD image pickup device according to a television system. The scanning means and the means for transferring the unnecessary charges accumulated in the pixels outside the image pickup area of the CCD image pickup device to the outside within the blanking period are configured.

[0007]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, in which a CCD image pickup device 1 and pixels of an image pickup region to be picked up within an effective image pickup region of the CCD image pickup device 1 according to a television system are scanned. The CCD drive unit 2 and the unnecessary charge transfer unit 3 that transfers and removes the unnecessary charges accumulated in the pixels outside the imaging region to the outside during the blanking period.

In the CCD image pickup device 1, the number of pixels in the effective image pickup area is 1035 in the vertical direction and 192 in the horizontal direction.
It is a CCD image sensor with a high pixel count of 0, totaling about 2 million.

FIG. 2 is a diagram showing an image pickup area of each television system. The image pickup area 11 shows an area of the high-definition system having an aspect ratio of 16: 9 and 1035 effective scanning lines, and the image pickup area 12 has an aspect ratio. A region of the second generation EDTV system having a ratio of 16: 9 and 492 effective scanning lines is shown, and the imaging region 13 shows an NTSC system having an aspect ratio of 4: 3 and 492 effective scanning lines.

In the case of the high-definition system, the CCD drive section 2 interlace-scans all the pixels of the CCD image pickup device 1 (pixels in the image pickup area 11).

In the case of the second generation EDTV system, CC
The D drive unit 2 performs non-interlaced scanning with respect to the pixels of the image pickup area 12 of the CCD image pickup device 1 using two pixels in the vertical direction as one scanning line to read out. In this case, the number of unused pixels is 51 in the vertical direction and 95 in the horizontal direction. In order to prevent the influence of these pixels from appearing on the screen, the unnecessary charge transfer unit 3 transfers the charges accumulated in the pixels not used during the blanking period to the outside at a high speed.

Further, in the case of the NTSC system, the CCD drive section 2 performs interlaced scanning in the vertical direction with respect to the pixels of the image pickup area 13 of the CCD image pickup device 1 to read out. In this case, the number of pixels that are not used is 51 in the vertical direction and 550 in the horizontal direction.
When reading a field, the charges accumulated in the pixels corresponding to the second field are transferred and emptied before being sent to the vertical register, and are combined when transferred from the vertical register to the horizontal register. Similarly, when reading the second field, the charges accumulated in the pixels corresponding to the first field are transferred and emptied before being sent to the vertical register, and are combined when transferred from the vertical register to the horizontal register. ..

[0014]

As described above, according to the present invention, a CCD image pickup device having a high pixel count capable of high-definition image pickup is used to scan pixels in an image pickup area corresponding to each television system, and By transferring the unnecessary charges accumulated in the unused pixels to the outside during the blanking period, a plurality of television systems (high-definition system, second-generation EDTV system, NTSC) having different aspect ratios in one television camera device Method).

[Brief description of drawings]

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

FIG. 2 is a diagram showing an imaging area of each television system.

[Explanation of symbols]

 1 CCD image pickup device 2 CCD drive unit 3 Unnecessary charge transfer unit

Claims (1)

[Claims] 1. A CCD image pickup device having a high number of pixels, means for scanning pixels of an image pickup region picked up within an effective image pickup region of the CCD image pickup device according to a television system, and the C
A television camera device, comprising: means for transferring unnecessary charges accumulated in pixels outside the image pickup area of the CD image pickup device to the outside within a blanking period.