TW429689B - Automatic sampling adjusting system - Google Patents

Automatic sampling adjusting system

Info

Publication number
TW429689B
TW429689B TW88116986A TW88116986A TW429689B TW 429689 B TW429689 B TW 429689B TW 88116986 A TW88116986 A TW 88116986A TW 88116986 A TW88116986 A TW 88116986A TW 429689 B TW429689 B TW 429689B
Authority
TW
Taiwan
Prior art keywords
sampling frequency
display mode
value
predetermined
frame
Prior art date
Application number
TW88116986A
Other languages
Chinese (zh)
Inventor
Chao-Wen Liu
Ching-Sheng Li
Shen-Min Lo
Original Assignee
Ctx Opto Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ctx Opto Electronics Corp filed Critical Ctx Opto Electronics Corp
Priority to TW88116986A priority Critical patent/TW429689B/en
Application granted granted Critical
Publication of TW429689B publication Critical patent/TW429689B/en

Links

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  • Analogue/Digital Conversion (AREA)

Abstract

The present invention discloses an automatic sampling adjusting system for quickly adjusting the sampling frequency and phase of the A/D converter during the conversion of analog image to digital image signal. The method of the adjusting system includes deciding a display mode, and setting the predetermined parameter by the display mode, and according sampling frequency and phase. The steps of counting sampling frequency consists of reading the image parameter, such as the height of the vertical frame and the breadth of the horizontal frame, and the total sum of the gray scale value of all 2 borderer points in one frame. If the height of the vertical frame is equal to the predetermined height of the vertical frame of the display mode, and the breadth of the horizontal frame is in the range of the positive/negative predetermined deviations of predetermined horizontal frame of display mode, then counts the sampling frequency by boundary value method, or, getting the sampling frequency by least absolute difference method. If the least absolute difference method does not get the sampling frequency, then checks the total sum of the gray scale value is more than a accumulation valve or not. If the gray scale value is larger than the accumulation valve value, then gets the sampling frequency by maximum calculated value method, otherwise, uses the default value of display mode sampling frequency.
TW88116986A 1999-09-30 1999-09-30 Automatic sampling adjusting system TW429689B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW88116986A TW429689B (en) 1999-09-30 1999-09-30 Automatic sampling adjusting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW88116986A TW429689B (en) 1999-09-30 1999-09-30 Automatic sampling adjusting system

Publications (1)

Publication Number Publication Date
TW429689B true TW429689B (en) 2001-04-11

Family

ID=21642469

Family Applications (1)

Application Number Title Priority Date Filing Date
TW88116986A TW429689B (en) 1999-09-30 1999-09-30 Automatic sampling adjusting system

Country Status (1)

Country Link
TW (1) TW429689B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI738139B (en) * 2019-12-04 2021-09-01 財團法人資訊工業策進會 Device, system, and method for data acquisition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI738139B (en) * 2019-12-04 2021-09-01 財團法人資訊工業策進會 Device, system, and method for data acquisition

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Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent
MM4A Annulment or lapse of patent due to non-payment of fees