JP2008193554A - Television camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television camera system capable of performing an aspect ratio conversion and a fine adjustment of a viewing angle in a vertical direction without changing a fixing position of a television camera. <P>SOLUTION: The television camera system is provided with: an electronic zoom means; an aspect ratio conversion means using the electronic zoom means; and an electronic tilt means using image segmentation of the electronic zoom means. The electronic tilt means is controlled by a remote control means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a television camera system, and more particularly to aspect ratio conversion and electronic tilt.

Conventionally, the aspect ratio conversion of a video signal output from a television camera has been performed by frame memory writing and reading control. (For example, refer to Patent Document 1).
JP-A-10-304314

  In a television camera that does not include the above-described conventional pan head mechanism (pan / tilt mechanism), once the television camera is fixed, the position of the television camera is fixed again to finely adjust the angle of view. Has the disadvantage of having to re-adjust.

  The object of the present invention is to eliminate this drawback and to perform aspect ratio conversion and fine adjustment of the angle of view in the vertical direction without changing the fixed position of the television camera.

  The television camera system of the present invention has an electronic zoom means, an aspect ratio converting means using the electronic zoom means, and an electronic tilt means using image clipping of the electronic zoom means, and the electronic tilt means is a remote control means. It is characterized by controlling by.

  According to the present invention, even in a television camera that does not include a pan head mechanism (tilt mechanism), the aspect ratio conversion and the fine adjustment of the angle of view in the vertical direction are performed by remote control without changing the fixed position of the television camera. be able to.

  An embodiment of video signal aspect ratio conversion and electronic tilt of a television camera (imaging device) according to the present invention will be described below with reference to FIGS.

  FIG. 1 is a block diagram showing a television camera system according to an embodiment of the present invention. FIG. 1 shows only the portions necessary for explaining the present invention. The imaging device (television camera) 1 does not have a vertical tilt mechanism.

  In FIG. 1, 1 is an imaging device, 2 is a lens unit that forms incident light, 3 is a CCD (Charge Coupled Device) imaging device unit that converts light incident from the lens unit 2 into an electrical signal, and 4 is a CCD imaging device. A CDS (Correlated Double Sampling) unit for removing noise from the signal output from the unit 3, an amplifier unit for adjusting the gain of the signal output from the CDS unit 4, and an analog signal output from the amplifier unit 5. An A / D converter (Analog Digital Converter) 7 for converting to a digital signal, a line interpolator 8 for performing line (scanning line) interpolation on a video signal read out from the CCD image pickup device 3 by a method to be described later, 8 Is a video signal processing unit that performs various image processing and then converts the video signal into a predetermined video signal and outputs it, and 9 is a CPU (Central Processing Unit) that controls each unit in the imaging apparatus 1. A CCD driving unit 10 performs high-speed transfer, normal transfer start position, and thinning-out reading of the CCD image sensor unit 3. Reference numeral 11 denotes a display device that displays a video signal output from the imaging device 1, and reference numeral 12 denotes a control device that controls an aspect ratio and an electronic tilt described later.

  FIG. 2 is a diagram for explaining aspect ratio conversion and electronic tilt according to an embodiment of the present invention.

  FIG. 2A shows an incident light image captured on the CCD light receiving surface. The CCD light receiving surface of the CCD image pickup device section 3 has an aspect ratio of 4: 3. In this embodiment, the incident light image is a “perfect circle”. In order to set the aspect ratio of the video signal output from the imaging device 1 to 16: 9, the video signal output from the CCD imaging device unit 3 is read out by the CCD drive unit 10 with the center being the center, and the line interpolation unit 7 performs the thinning readout. Thus, the missing line (scan line) is interpolated to make the vertical direction 1.333 times. When this video signal is displayed on the display device 11 having an aspect ratio of 4: 3, the “perfect circle” becomes a vertically long “ellipse” as shown in FIG. When this video signal with the vertical direction multiplied by 1.333 is displayed on the display device (monitor) 11 having an aspect ratio of 16: 9, it becomes a “perfect circle” as shown in FIG.

  In FIG. 2D, the video signal output from the CCD image pickup device unit 3 is thinned and read out sequentially from the top by the CCD drive unit 10, and line (scanning line) interpolation is performed by the line interpolation unit 7, thereby making the vertical direction one. A video signal obtained by multiplying by .333. When this video signal is displayed on the display device 11 having an aspect ratio of 16: 9, the “perfect circle” moves downward. In (e), the video signal output from the CCD image pickup device unit 3 is thinned and read out by the CCD driving unit 10 so as to read out the lowest line, and the line interpolation unit 7 performs line (scanning line) interpolation to perform vertical. This is a video signal obtained by multiplying the direction by 1.333 times. When this video signal is displayed on the display device 11 having an aspect ratio of 16: 9, the “perfect circle” moves upward. In this way, by changing the position where the CCD image pickup unit 3 is thinned and read out, an electronic tilt is obtained. The aspect ratio of the screen of a conventional standard television (SDTV) receiver is 4: 3, while the aspect ratio of the screen of a horizontally long television receiver or HDTV (High Definition TV) receiver is 16: 9.

  FIG. 3 is a diagram for explaining aspect ratio conversion and electronic tilt control according to an embodiment of the present invention. FIG. 3 is an operation screen displayed on a display (not shown) of the control device 12. When the aspect ratio of “4: 3” is selected on the operation screen of the control device 12 of FIG. 3, the electronic tilt does not operate. When an aspect ratio of “16: 9” is selected on the operation screen of FIG. 3, the electronic tilt can be operated. When the upward arrow of the electronic tilt is pressed on the operation screen of FIG. 3, the cursor moves upward from the center. For example, the cursor is operated by a pointing device such as a mouse or a keyboard button operation. In the electronic tilt operation, the reading position of the CCD image sensor unit 3 is changed according to the movement amount of the cursor. When the downward arrow of the electronic tilt is pressed on the operation screen of FIG. 3, the cursor moves downward from the center. The reading position of the CCD image sensor unit 3 is changed according to the amount of movement of the cursor. In order to operate in this way, a control signal is input from the control device 12 to the CPU 9, and the readout position of the CCD image sensor unit 3 is changed from the CPU 9 via the CCD driving unit 10. The operation screen of the control device 12 may be displayed on either a display built in the control device 12 or an external display, or may be superimposed on the display device 11.

  According to the present invention, the aspect ratio conversion and the fine adjustment of the angle of view in the vertical direction can be performed by remote control without changing the fixed position of the television camera.

  In the embodiment of the present invention, the connection between the imaging device 1, the display device 11, and the control device 12 has been described as a direct connection, but it goes without saying that the connection may be made via wireless or the Internet.

  Although the present invention has been described in detail above, it is needless to say that the present invention is not limited to the television camera system described herein, and can be widely applied to television camera systems other than those described above.

The block diagram which shows the television camera system of one Example of this invention. The figure for demonstrating the aspect-ratio conversion and electronic tilt which are one Example of this invention. The figure for demonstrating the operation screen of the control apparatus which is one Example of this invention.

Explanation of symbols

  1: imaging device, 2: lens unit, 3: CCD image sensor unit, 4: CDS unit, 5: amplifier unit, 6: A / D conversion unit, 7: line interpolation unit, 8: video signal processing unit, 9: CPU, 10: CCD drive unit, 11: CCD drive unit, 12: control device.

Claims (1)

In a television camera system,
An electronic zoom means, an aspect ratio conversion means using the electronic zoom means, and an electronic tilt means using image clipping of the electronic zoom means, wherein the electronic tilt means is controlled by a remote control means. A television camera system.

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