公开(公告)号：KR100426655B1

公开(公告)日：2004-04-13

申请号：KR1020030064678

申请日：2003-09-18

Applicant: (주)유디피

Inventor： 김형주 ,  심재술 ,  윤중범 ,  정승일

IPC: H04N5/52

Abstract: PURPOSE: A multi-channel image signal capture method with an improved AGC(Automatic Gain Control) function and a system therefor are provided to perform the AGC function without degrading a capture speed(frame rate). CONSTITUTION: A multiplexer(301) receives a plurality of analog image signals from a plurality of channels, and selectively outputs the received analog image signals. A reference signal calculating unit(302) measures a level of the analog image signal corresponding to each channel, determines an amplification rate necessary for outputting a certain target level from the measured level, and stores a digital reference signal value corresponding to the amplification rate according to channels. A digital/analog converting unit(303) retrieves a digital reference signal value corresponding to a channel determined according to a certain capture sequence among the stored digital reference signal values, and generates an analog reference signal corresponding to the retrieved digital reference signal value. An image signal capture unit(304) amplifies the analog image signal inputted from the multiplexer(301), and converts the amplified analog image signal into a digital image signal.

公开(公告)号：KR100415838B1

公开(公告)日：2004-01-31

申请号：KR1020030065040

申请日：2003-09-19

Applicant: (주)유디피

Inventor： 김형주 ,  심재술 ,  윤중범 ,  정승일

IPC: H04N7/18

Abstract: PURPOSE: A multi-channel image signal capture system and a multi-channel image signal capture method are provided to achieve improved image signal capture ratio by accurately determining the unstable period and maximizing the ratio of capture enabled video data. CONSTITUTION: A multi-channel image signal capture system(100) comprises a receiving module(110) for receiving image signals including video data from one or more cameras; a synchronous signal separator module(120) for separating synchronous signals representing the position of the video data from the image signals; an image capture module(130) for capturing first and second image signals in a predetermined capture order; a storing module(140) for storing the separated synchronous signal and information regarding the unstable period of the image capture module; and a determination module(150) for selecting the synchronous signal of the second image signal existing in the section other than the unstable period, based on the synchronous signal extracted from the first image signal and the unstable period.