A method for controlling high-definition lens of a long-distance broadcast camera

Abstract

The invention discloses a remote broadcast level video camera high-definition lens control method. The method comprises the following steps: (1) receiving a lens zooming value, a focusing value and an aperture value in analog quantity forms, a view field zooming value and a color gain value in digital quantity forms, and a mode selection signal; (2) performing AD sampling on analog quantities; (3) framing each quantity represented in the digital quantity form based on modes and bits according to the mode selection signal to obtain a frame of control command, and transmitting to the control command to the control end of a broadcast level lens; and (4) performing frame extraction on the control command to obtain each digital quantity, performing biasing and voltage transformation on the lens zooming value, the focusing value and the aperture value represented in the digital quantity forms obtained by frame extraction twice to obtain corresponding analog quantities, and transmitting the corresponding analog quantities to the server side of the broadcast level lens for servo control, and reframing the view field zooming value and the color gain value represented in the digital quantity forms obtained by frame extraction according to a broadcast level lens communication protocol, and transmitting the reframed view field zooming value and color gain value to the server side of the broadcast level lens for servo control.

Description

technical field [0001] The invention relates to a control method for a high-definition lens of a broadcast-level camera, which is suitable for the control of mainstream broadcast-level high-definition lenses on a stable platform for film and television special shooting, and can be expanded and applied to the control of camera lenses with a voltage conversion control interface, and can be applied to aerial photography, Marathon follow-up, TV broadcast, film special effects shooting, etc. Background technique [0002] The control of the broadcast camera lens, under normal circumstances, will use the lens and lens matching equipment such as zoom focus for limited control, and such supporting equipment controls the movement of the broadcast camera lens through analog voltage conversion. [0003] When operating a broadcast-level lens over a long distance, the long-distance wiring will cause voltage loss, resulting in inaccurate control of the high-definition lens; the way of dire...

AI Technical Summary

Problems solved by technology

[0003] When operating a broadcast-level lens over a long distance, the long-distance wiring will cause voltage loss, resulting in inaccurate control of the high-definition lens; the way of directly transmitting the voltage from the outside of the platform, the voltage change will cause interference to the control signal; and according to The platform needs to transmit the communication medium, and the analog voltage signal cannot be transmitted (optical cable, slip ring, etc.)

[0004] If according to the protocol of the broadcast lens itself, the operation command of the control terminal is directly converted into a protocol to control the broadcast lens in the form of a serial port, then each frame sent by the serial port can only contain one operation command, so that at the same time, the broadcast lens It can only respond to one kind of operation, which does not conform to the similar operation habit of the operator who wants to adjust the focus while zooming

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