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HD-SDI (High Definition-Serial Digital Interface) video signal transmission system and method in high-speed dome camera

A video signal and transmission system technology, which is applied to the parts of the TV system, image communication, TV, etc., can solve the problems of the impedance discontinuity of the conductive slip ring device and the accuracy of the data code stream affecting the high-speed transmission, etc. The effect of compressing digital video signal output

Active Publication Date: 2011-09-14
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

In order to ensure the reliability of the electrical connection when the equipment rotates, the dome camera usually uses a conductive slip ring device for signal transfer, and the conductive slip ring device has impedance discontinuity, which is more likely to cause signal integrity problems and affect high-speed The accuracy of the transmitted data stream

Method used

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  • HD-SDI (High Definition-Serial Digital Interface) video signal transmission system and method in high-speed dome camera
  • HD-SDI (High Definition-Serial Digital Interface) video signal transmission system and method in high-speed dome camera

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 As shown, the HD-SDI video signal transmission system in the high-speed dome camera of the present invention is mainly composed of a high-definition camera, FPGA, conductive slip ring, HD-SDI driver chip and HD-SDI interface in series.

[0015] The invention uses FPGA at the front end of the video transmission system to complete camera raw data collection, code scrambling and LVDS transmission; the intermediate link transmits through a conductive slip ring device; the rear end uses an HD-SDI driver chip to realize LVDS reception and HD-SDI interface drive.

[0016] For the transmission of the signal of the conductive slip ring device, this system uses LVDS transmission and processing, which can avoid signal integrity problems such as reflection and crosstalk caused by single-ended transmission. At the same time, use the serial t...

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Abstract

The invention discloses an HD-SDI (High Definition-Serial Digital Interface) video signal transmission system and method in a high-speed dome camera. The method comprises the following steps of: acquiring initial data of a camera by using an FPGA (Field Programmable Gate Array) and caching, scrambling and encoding the initial data in the high-speed dome camera which supports an HD-SDI; transmitting a high-speed digital video signal in a conductive slip ring in an LVDS (Low Voltage Differential Signaling) manner to avoid signal integrity problems such as reflection, crosstalk and the like due to single-ended transmission means; serializing a back end through an HD-SDI driving chip, and driving the back end to the HD-SDI; and outputting an uncompressed high-definition digital video signal.

Description

technical field [0001] The invention relates to the technical field of security monitoring, in particular to an HD-SDI video signal transmission system and method in a high-speed dome camera. Background technique [0002] The SDI interface, namely the digital serial interface (serial digital interface), is a broadcast-level high-definition digital input and output standard, which is used to transmit uncompressed digital video signals. HD (High Definition) is a high-definition signal. HD-SDI meets the SMPTE 292M standard formulated by SMPTE (Society of Motion Picture and Television Engineers), and supports transmission at a signal rate of 1.485Gb / s. This standard stipulates the data format, channel coding method, signal specification of communication cable interface, connector and cable type and optical fiber interface, etc. [0003] With the advantages of high-speed rotation, large multiple zoom, wide monitoring range, and convenient operation, the high-speed dome camera is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N5/225
Inventor 李剑平章涛张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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