Method for transmitting image data of multi-channel high-speed line-frequency-variable linear array CCD (charge coupled device)

A technology of image data and transmission method, which is applied in the field of multi-channel high-speed line frequency variable linear array CCD image data transmission, can solve the problems of image data loss, increase system complexity and power consumption, etc., reduce cables and improve reliability Sexuality and easy operation

Active Publication Date: 2013-04-03
长光驰宇科技(长春)有限公司
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of linear array CCD with variable line frequency, it is necessary to further deal with variable line interrupt events and increase the read and write clock frequency of SDRAM, which not only increases the system complexity and power consumption, but al

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for transmitting image data of multi-channel high-speed line-frequency-variable linear array CCD (charge coupled device)
  • Method for transmitting image data of multi-channel high-speed line-frequency-variable linear array CCD (charge coupled device)
  • Method for transmitting image data of multi-channel high-speed line-frequency-variable linear array CCD (charge coupled device)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, the 1-channel linear array CCD image data is output in line units, each line is composed of effective pixels and invalid pixels, the number of effective pixels is fixed, and the Line signal corresponding to the effective pixels is "1". The number of invalid pixels needs to be adjusted in real time for different speed matching when the camera works on orbit, and the Line signal corresponding to the number of invalid pixels is "0". The frequency f of the shift clock C of effective pixels and invalid pixels 1 It is always the same. When the number of invalid pixels changes, the frequency F of the Line changes. Suppose the image data is k bits, 8

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for transmitting image data of a multi-channel high-speed line-frequency-variable linear array CCD (charge coupled device), and relates to the field of transmission of image data of aerospace and aviation CCD cameras. The method includes steps that a digital phase-locked loop clock management unit creates a relation between frequency of a pixel transfer clock and frequency of a TLK2711 transmission clock according to the quantity of transmission channels of the CCD, the pixel transfer clock and the quantity of transmission channels of TLK2711 devices; the TLK2711 devices create a reliable and stable transmission link for transmitting and receiving the image data; and multi-channel image data fusion transmission and line signal and image data fusion transmission units start to fuse the multi-channel data into one channel of data and transmit the channel of data to the TLK2711 devices after the transmission link is stable, and the TLK2711 deserializer transmits the channel of data to a receiving FPGA (field programmable gate array) processor. The method has the advantage that cables of an aerospace and aviation remote-sensing camera data transmission system are greatly reduced.

Description

technical field [0001] The invention relates to the field of image data transmission of aerospace CCD cameras, in particular to a method for transmitting multi-channel high-speed line-frequency variable linear array CCD image data. Background technique [0002] In high-resolution aerospace remote sensing applications, as the field of view and resolution indicators of linear array CCD cameras continue to increase, the number of CCD output channels, the number of spliced ​​pieces, and the single-port readout rate are also increasing, resulting in The amount of digitized image data increases exponentially, coupled with the real-time changes in the line frequency of the CCD camera in orbit, making image data transmission very difficult. The existing image data transmission methods based on LVDS and Camera Link do not have high-speed (digital transmission parallel clock exceeds 85MHz) transmission capabilities, and the use of multi-channel LVDS and Camera Link transmission result...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04N5/372
Inventor 李进金龙旭李国宁武奕楠张宇王文华张宁
Owner 长光驰宇科技(长春)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products