JPH1093854A - Television camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control image quality to be more desirable image quality more easily from the outside of the camera by sending parameters in the inside of the camera such as white balance, gamma correction and color saturation to an external device and receiving the parameters externally and setting them to the inside. SOLUTION: A digital video signal received by a digital signal processor(DSP) 5 of the TV camera is subject to image quality control by a value calculated by a microcomputer 7 based on parameters stored in an EEPROM 8 and the signal is converted into an analog signal and it is outputted from an output amplifier 6. Furthermore, each parameter of the DSP 5 and the EEPROM 8 is sent via a control parameter transmission reception section 9 according to a command of a control personal computer 11 at the outside of the camera. Moreover, the new parameter commanded by the control personal computer 11 is received via the control parameter transmission reception section 9 and replaced with the existing parameter stored in the EEPROM 8. Since the new parameter revised by a relative control variable is set to the camera based on the existing parameter, the image quality is easily adjusted to desired image quality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera having an external remote control function.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional television camera system. In FIG. 2, 1 is a lens, 2 is a solid-state imaging device (hereinafter referred to as CCD), 3 is a correlated double sampling and automatic gain control unit (hereinafter CDS).
& AGC), 4 is an A / D converter, 5 is a DSP (hereinafter referred to as DSP and D / A) having a built-in D / A converter, 6 is an output amplifier, 7 is a microcomputer, and 8 is a nonvolatile memory (hereinafter, EEPROM). , 12 is a DSP control parameter receiving unit, and 13 is a parameter input terminal. Reference numeral 11 denotes an external controller for performing external remote control of the camera, for example, a personal computer (hereinafter referred to as a personal computer).

Next, the operation will be described. Light incident from the subject through the lens 1 is photoelectrically converted by the CCD 2 to become a video signal. The video signal output from the CCD 2 is sampled and held in the CDS section of the CDS & AGC 3 to remove low frequency noise components.
In the AGC section, gain control is performed so that the video signal level converges to a constant level. An output signal from the CDS & AGC 3 is converted into a digital video signal by the A / D converter 4 and input to the DSP 5. The digital video signal input to the DSP 5 has a value calculated inside the microcomputer 7 based on the image data sent from the DSP 5 to the microcomputer 7 and the parameters stored in the EEPROM 8.
5, image quality control such as white balance control, gamma correction, contour correction, and color saturation is performed.
The digital video signal subjected to the image quality control is converted into an analog video signal by a D / A converter in the DSP 5, and further,
The signal is amplified by the output amplifier 6 and output from the output amplifier 6 as a composite video signal.

At this time, when image quality control performed by the DSP 5 is controlled from outside the camera, a new parameter is transferred from the personal computer 11 to the camera. The new parameters transferred from the personal computer 11 are input to the camera from the parameter input terminal 13. The new parameters input to the camera are transmitted to the DSP control parameter receiving unit 1
2, the existing parameters stored in the EEPROM 8 via the microcomputer 7 are rewritten with the transferred new parameters. At the same time, the parameters of the image quality control performed by the DSP 5 are also changed to the new parameters.

[0005]

The above-mentioned prior art includes the following:
When adjusting image quality control such as contour correction and color saturation from the outside, existing parameters inside the camera are not output to the outside, so it is not possible to recognize how much the parameter should be changed and it is difficult to adjust. There is.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a DSP and an EEPROM in a camera for eliminating the above disadvantages.
The DSP control parameter transmitting unit and the parameter output terminal for outputting the existing parameters to the outside are added.

As a result, when the image quality of the camera is to be adjusted from the outside, the DSP and the EEPROM in the camera are required.
Existing parameters are output to the outside of the camera, and it is easy to adjust the image quality of the camera by knowing how much the parameters inside the camera should be changed based on the output existing parameters. be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is a diagram showing a block configuration of an embodiment of a system using a television camera according to the present invention. In FIG. 1, 1 is a lens, 2 is a CCD, 3 is C
DS & AGC, 4 is an A / D converter, 5 is a DSP, 6 is an output amplifier, 7 is a microcomputer, 8 is EEPROM, 9 is DS
A P control parameter transmitting / receiving unit, 10 is a parameter input / output terminal, and 11 is a personal computer that performs external remote control of the camera.

Next, the operation will be described. Here, the operation until the light incident from the subject through the lens 1 is output from the output amplifier 6 as a composite video signal is the same as that of the related art described above, and a description thereof will be omitted.

Further, the operation related to the present invention will be described. The parameters of the DSP 5 and the EEPROM 8 are output from the parameter input / output terminal 10 to the personal computer 11 outside the camera via the DSP control parameter transmitting / receiving section 9. When image quality control such as contour correction and color saturation performed by the DSP 5 is controlled from an external personal computer 11, a parameter input / output terminal 10 via a DSP control parameter transmission / reception unit 9 and a personal computer external to the camera 11 and the existing parameters are transferred to PC 1
Read at 1. The newly determined parameters are transferred from the personal computer 11 to the camera based on the read existing parameters inside the camera. The new parameters transferred from the personal computer 11 are input from the parameter input / output terminal 10 into the camera. The new parameters input to the camera are received by the DSP control parameter transmission / reception unit 9,
8 are replaced with the existing parameters, and the parameters of the image quality control performed by the DSP 5 are also changed to the new parameters.

[0011]

According to the present invention, the parameters of the DSP and the EEPROM which control the camera-specific functions such as contour correction and color saturation are output to the outside of the camera. Therefore, when adjusting the image quality of the camera from the outside, it is possible to determine with a personal computer what kind of existing parameters the image quality control in the DSP is operating. Based on the existing parameters, new parameters changed with a predetermined relative control amount can be sent back to the camera side,
It is easy to control the image quality to a desired one.

[Brief description of the drawings]

FIG. 1 is a diagram showing a block configuration of an embodiment of a system using a television camera according to the present invention.

FIG. 2 is a diagram showing a block configuration of an example of a conventional television camera system.

[Explanation of symbols]

 5 DSP 7 microcomputer (microcomputer) 8 EEPROM (non-volatile memory) 9 DSP control parameter transmitting / receiving section 10 parameter input / output terminal

Claims (1)

[Claims] 1. A digital video signal processing circuit (hereinafter referred to as DS)
P), a microcomputer (hereinafter referred to as a microcomputer) and a nonvolatile memory such as an EEPROM in a television camera. The parameters stored in the memory are read out of the television camera, new parameters changed based on the read parameters are set in the DSP in the television camera, and the parameters are stored in an EEPROM or the like. A television camera comprising means written in a nonvolatile memory and held as parameters of various control items.