JPH03250979A - Video camera - Google Patents

Abstract

PURPOSE:To obtain a recording video image enough to be used for a broadcast or the like by providing an automatic video recording switch in addition to a usual manual video recording switch so as to attain the setting and adjusting state to execute the photographing under a predetermined condition and applying the photographing and video recording. CONSTITUTION:An automatic video recording switch 3 is depressed on emergency where there is no time of setting and adjustment by setting switch groups 1a-1g prior to pickup. Then the old setting state of the setting switch groups 1a-1g is disregarded and a microcomputer 4 reads the predetermined setting and adjusting state from a memory 4a. The operation of the iris and the optical system of each circuit or the like and of various pickup processing circuits is controlled according to the setting and adjusting state. Thus, recording video image enough to be used for broadcast or the like is obtained without fail even in any setting and adjusting state of the setting switch groups 1a-1g by having only to depress the automatic video recording switch on emergency.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to video cameras, and in particular to high-resolution image sensors (image pickup tubes, solid-state image sensors) such as those used in professional video cameras, and the corresponding high-resolution image sensors. The present invention relates to a video camera that has an optical system such as a functional lens and an imaging processing circuit such as a highly functional amplifier, and also has a large number of setting items and adjustment items that must be performed before shooting.

(Prior Art) Conventionally, high-group i-degree image pickup devices (image pickup tubes, solid-state image pickup devices) for professional use, corresponding optical systems such as high-performance lenses, and image processing circuits such as high-performance amplifiers have been used. For video cameras equipped with a After setting the camera mode such as the temperature filter setting and shutter speed setting, and adjusting the gain, etc., press the record switch to start shooting with the video camera and also to start recording on the video tape recording device connected to the video camera ( (VTR) has started recording.

In recent years, in order to obtain higher-resolution images, the number of setting items and adjustment details has increased, and although detailed settings can be made, operations have become complicated and settings and adjustments have become time-consuming.

(Problems to be Solved by the Invention) As described above, in a professional video camera, there are many setting items and adjustments to be made before shooting. For this reason, sufficient time is required to make settings and adjustments that suit the photographing conditions before photographing.

It's good when you have plenty of time and can set and adjust the optimal values, but when you need to start shooting and recording with a video camera immediately, such as when reporting an emergency such as when a sudden accident occurs. If you do not take time to make settings and adjustments, the recorded video may have poor white balance, or
This poses a problem in that the image is often extremely poor quality, such as when the aperture is incorrect, and the image may be unsuitable for news broadcasts and the like.

Therefore, the present invention provides a separate recording switch (auto recording switch) in addition to the normal manual recording switch for recording in this setting state after setting with a group of setting switches before shooting. When the switch is pressed, emergency shooting can be performed by configuring the settings and adjustment state to execute shooting and recording of a predetermined number of shots, regardless of the setting status of the setting switch group, and shooting and recording. A video camera that allows you to record video that does not look strange and can withstand broadcasting, etc., even if the video is not at f & proper even when there is not enough time to set and adjust before shooting. The purpose is to provide

(Means for solving problems) High-resolution imaging is a means to achieve the above objectives.
t:r- and a corresponding high-performance optical system and image processing circuit, a group of setting switches for individually setting and adjusting the optical system and various image processing circuits of the video camera to predetermined states; , a control circuit that controls the optical system of the video camera and various image processing circuits according to this signal, and a control circuit that controls the optical system of the video camera and various image processing circuits; a recording device that records the output video signal; and a manual recording switch that instructs the control circuit to shoot according to the state set and adjusted by the setting switch group and to start recording in the recording device. , 1 and 2 means for storing the settings and adjustment states of the optical system and various imaging processing circuits for performing photography under certain conditions; Various image processing circuits in front 8c! It is characterized by comprising a recording switch that instructs the control circuit to take a picture and start recording in the recording device according to the settings and adjustment states stored in the storage means. The aim is to provide video cameras.

(Embodiment) An embodiment of the video camera of the present invention will be described with reference to the drawings.

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

In the figure, 1a to 1g are setting switches for setting the shooting state of the camera before shooting, and in this embodiment, the iris switch 1a is used to set various iris settings and switch between auto mode and manual mode. Color temperature filter changeover switch 1b, shutter speed changeover switch 1c=
Consider a case where there is a white balance auto mode/manual mode changeover switch 1d, a gain changeover switch le, a process processing setting switch 1f, and a color parity/camera input changeover switch 1g. Process processing settings include white level compression setting (knee level setting), gamma correction, auto black level (AB), optical flare, ring distance correction (condoor), and black level setting (master black).
etc. is to be set.

In addition, the manual recording switch 2 is set to the setting switch 1a~
Shoot according to the status (value) set at 1g,
The auto recording switch 3 is a switch that starts recording, and the auto recording switch 3 is a switch that performs predetermined settings and adjustment states (settings and adjustment states that execute shooting under certain conditions) regardless of the states (values) of the setting switches 1a to 1g. This is a switch that takes pictures and starts recording according to the following.

The setting switch group 1a to Ig, the manual recording switch 2, and the auto recording switch 3 are connected to a microcomputer 4, which controls the auto iris circuit #I6, the filter setting circuit 7, and the shutter switch, respectively. Control circuit 8, white balance circuit 9, gain control circuit 10, switch 24. It is connected to a video tape recording circuit (VTR) 5 and controls each circuit.

Further, the microcomputer 4 includes a memory 4a (ROM) that stores predetermined settings and adjustment states for executing photography under certain conditions.

The auto iris circuit 6 is connected to the lens 12 and adjusts the amount of light incident on the image sensors 15 to 17 (aperture), and the filter setting circuit 7 is connected to the color temperature switching filter 14 to adjust the amount of light incident on the image sensors 15 to 17. The color temperature of the temperature switching filter 14 (for example, 3000K, 4300K, 5
This is a circuit that switches between 600K and 600K.

The shutter control circuit 8 includes an image sensor (CCD) 1
5.16.17 This is a circuit that switches the shutter speed,
The white balance circuit 9 is connected to the filter setting diagram N7, outputs information for switching the color temperature switching filter 14 to the filter setting circuit 7, and is a voltage-controlled type of red (R) signal and blue <B) signal. Amplifier circuit (VCA) 18
．． 20 to achieve white balance based on the green (G) signal. Further, the gain control circuit 10 is a circuit that switches and controls the gains of VCAI 8 to 2o (for example, OdB, 6dB, 12dB ALC: automatic gain control), and the switch 24 is a switch for each R, G, and B signal. 24a, 24b.

24c, which switches between the camera input from the video processing circuits 21 to 23 and the color par signal (adjustment reference signal) from the color par signal generation circuit 11 using a control signal from the microcomputer 4. 2, a positive video signal, and a negative video signal), which are output to the encoder 25.

In addition, 14 is an image element 15 for red (R), and an image sensor 1 for green (<G), which captures the image (optical image) captured by the lens 12.
6. A prism that separates light into the image sensor 17 for blue (B).

The video signal output from the encoder 25 is output to the outside from the video signal output terminal 26 and is also output to the video tape recording device! (VTR) 5, where it will be recorded on a videotape (not shown).

In a video camera with such a configuration, in the case of normal shooting, first set the bet using the setting switch groups 1a to 1g before shooting, and then press the manual recording switch 2 to set the bet using the setting switch groups 1a to 1g. It's been done! According to the g (value), the microcomputer 4 controls the operation of the optical system such as the lens (iris) and each circuit, and the various image processing circuits, and when the image is taken, the encoder 25 outputs the image 1-=. The video is recorded by the i-auto tape recording device 5, and recording is started.

Next, using the flowchart shown in FIG. 2, we will explain the camera operation when photographing when there is no time to make settings and adjustments using the setting switch groups 1a to Ig before photographing (in the case of an emergency). .

If you press the auto recording switch 3 in an emergency (step 10)
1) Ignoring the setting states of the setting switch groups 1a to 1g, the microcomputer 4 reads predetermined settings and adjustment states from the memory 4a, and adjusts the lens (iris), each circuit, etc. according to these settings and adjustment states. Controls the operation of the optical system and various image processing circuits.

First, the switch 24 is connected to the VCAs 21 to 23, and the output from the encoder 25 is switched to a positive video signal from the camera (step 102). Next, the white balance circuit 9
is controlled in auto mode (step 103), and the gain control circuit 10 is also controlled in auto<ALC) mode (step 104). After setting the iris detection area, iris response speed, and iris control level to the states (values) read from the memory 4a (step 105), the iris is set to auto mode (step 106).

Next, the color temperature switching filter 13 is set to auto mode (step 107), and the shutter speed is set to normal speed (step 108).

Furthermore, video processing ports N21 to 23 are set such as auto mode for white level compression setting, auto mode for comma correction, auto black, auto mode for optical flare, auto mode for ring distance correction, and auto mode for black level setting. After that (step 109), photographing is performed, the video signal output from the encoder 25 is recorded by the video tape recording circuit 5, and recording is started (step 110).

Therefore, in an emergency, by simply pressing the auto recording switch 3, no matter what setting or adjustment state the setting switch groups 1a to 1g are in, a satisfactory record that will not fail and can withstand broadcasting, etc. can be obtained. You can get as many recorded videos as you want.

(Effect of the invention) The video camera of the invention is provided with an automatic recording switch,
When this automatic recording switch is pressed, the optical system and various image processing circuits of the video camera are set and adjusted to take a certain number of shots. Even if you do not have enough time to make settings and adjustments that suit the shooting conditions before shooting, such as during emergency shooting, you can still record without failure and can withstand broadcasting. This has the effect that images can be obtained.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the video camera of the present invention, and Fig. 2 is a flow chart showing the operation of the video camera when the auto recording switch is pressed. , 2...Manual recording switch, 3...Auto recording switch, 4...Microcomputer (control circuit 8), 4a...
-Memory (storage means), 5...Video tape recording device f (V'T"R), 18~
20... Voltage controlled amplification diagram N (VCA), 21, ~2
3... Video process processing circuit, 24... Switcher,
24a-24c...Choice switch, 25...Kuninkoda.

Claims (1)

[Claims] In a video camera equipped with a high-resolution image sensor and a corresponding high-performance optical system and image processing circuit, the optical system and various image processing circuits of the video camera are individually set to predetermined states. and a group of setting switches to be adjusted; a control circuit that is supplied with signals corresponding to the settings and adjustments of the group of setting switches and controls the optical system of the video camera and various image processing circuits in accordance with the signals; and the various types of image pickup a recording device that records video signals processed and outputted by the processing circuit; and a control circuit that causes the recording device to shoot according to the conditions set and adjusted by the setting switch group and to start recording in the recording device. a manual recording switch for instructing; a storage means for storing settings and adjustment states of an optical system and various imaging processing circuits for executing photography under certain conditions; and an automatic recording switch that instructs the control circuit to perform photographing of the system and various imaging processing circuits according to the settings and adjustment states stored in the storage means, and to start recording with the recording device. A video camera featuring: