JPS56149872A - Ghost removing device - Google Patents
Ghost removing deviceInfo
- Publication number
- JPS56149872A JPS56149872A JP5334580A JP5334580A JPS56149872A JP S56149872 A JPS56149872 A JP S56149872A JP 5334580 A JP5334580 A JP 5334580A JP 5334580 A JP5334580 A JP 5334580A JP S56149872 A JPS56149872 A JP S56149872A
- Authority
- JP
- Japan
- Prior art keywords
- ghost
- comparator
- polarity
- noise
- signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/211—Ghost signal cancellation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To detect a ghost which is not influenced by noise and simplify the constitution of a ghost detection device, by providing the first comparator for detecting a ghost whose polarity is positive and the second comparator for detecting a signal whose polarity is negative. CONSTITUTION:A video signal from the input terminal 1 is input to the compounding device 2, and in this compounding device 2 is input a ghost having the reverse polarity against the ghost contained in the original video signal from the transversal filter A1, and it erases the original ghost and is output from the video output terminal 3. This output is provided to the variable delaying circuit 4 and the ghost processing circuit A2. On this circuit A2 are provided the comparator 12 which detects a ghost having the positive polarity at a larger threshold level than a noise level, and the comparator 13 which detects a signal having the negative polarity at a larger threshold level than a noise level. And, the outputs of both the comparators 12, 13 are stored in the counters 14, 15 from the leading edge of the vertical synchronizing signal for a prescribed time, and a ghost which is not influenced by a noise is detected by the outputs of the counters 14, 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5334580A JPS56149872A (en) | 1980-04-22 | 1980-04-22 | Ghost removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5334580A JPS56149872A (en) | 1980-04-22 | 1980-04-22 | Ghost removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56149872A true JPS56149872A (en) | 1981-11-19 |
Family
ID=12940174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5334580A Pending JPS56149872A (en) | 1980-04-22 | 1980-04-22 | Ghost removing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56149872A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130270A (en) * | 1983-12-16 | 1985-07-11 | Matsushita Electric Ind Co Ltd | Ghost eliminating device |
| JPS61152171A (en) * | 1984-12-26 | 1986-07-10 | Toshiba Corp | Digital ghost eliminating device |
-
1980
- 1980-04-22 JP JP5334580A patent/JPS56149872A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130270A (en) * | 1983-12-16 | 1985-07-11 | Matsushita Electric Ind Co Ltd | Ghost eliminating device |
| JPS61152171A (en) * | 1984-12-26 | 1986-07-10 | Toshiba Corp | Digital ghost eliminating device |
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