JPH0286280U - - Google Patents
Info
- Publication number
- JPH0286280U JPH0286280U JP16477788U JP16477788U JPH0286280U JP H0286280 U JPH0286280 U JP H0286280U JP 16477788 U JP16477788 U JP 16477788U JP 16477788 U JP16477788 U JP 16477788U JP H0286280 U JPH0286280 U JP H0286280U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- converting
- predetermined threshold
- maximum
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例の構成を示す構成図
、第２図はビデオ信号の波形の一例を示す波形図
である。
１……Ａ／Ｄ変換器、２……コンパレータ、３
……演算器。
FIG. 1 is a block diagram showing the structure of an embodiment of the present invention, and FIG. 2 is a waveform diagram showing an example of the waveform of a video signal. 1...A/D converter, 2...Comparator, 3
...Arithmetic unit.
Claims (1)
ルに設定され、画像部分の信号最大レベルが文字
部分より一定レベル低く設定されたアナログの文
字、画像混在のビデオ信号をデイジタルデータに
変換するビデオ信号のＡ／Ｄ変換装置において、 ビデオ信号の画像部分の最大値をデイジタルデ
ータの最大値より１小さい値に変換するＡ／Ｄ変
換手段と、 ビデオ信号を予め定められた閾値と比較して判
定信号を出力する比較手段と、 この比較手段によりビデオ信号が所定の閾値以
上であると判定されたときにデイジタルデータの
最大値を発生し、比較手段によりビデオ信号が所
定の閾値未満であると判定されたときに前記Ａ／
Ｄ変換手段からのデイジタルデータをそのまま通
過させる演算手段とを有することを特徴とするビ
デオ信号のＡ／Ｄ変換装置。[Claims for Utility Model Registration] A video signal containing a mixture of analog text and images, where the signal level of the text part is set to the maximum level of the video signal, and the maximum signal level of the image part is set to a certain level lower than that of the text part, is converted into a digital signal. An A/D conversion device for converting a video signal into data, comprising: an A/D conversion means for converting the maximum value of an image portion of the video signal to a value that is one smaller than the maximum value of the digital data; and a predetermined threshold value for converting the video signal. a comparison means for outputting a determination signal by comparing the video signal with a predetermined threshold; and a comparison means for generating a maximum value of digital data when the comparison means determines that the video signal is equal to or higher than a predetermined threshold; When it is determined that the above A/
1. A video signal A/D conversion device comprising: arithmetic means for passing digital data from the D conversion means as is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16477788U JPH0286280U (en) | 1988-12-20 | 1988-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16477788U JPH0286280U (en) | 1988-12-20 | 1988-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0286280U true JPH0286280U (en) | 1990-07-09 |
Family
ID=31450672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16477788U Pending JPH0286280U (en) | 1988-12-20 | 1988-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0286280U (en) |
-
1988
- 1988-12-20 JP JP16477788U patent/JPH0286280U/ja active Pending
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