JPS56147574A - Ghost elimination device - Google Patents
Ghost elimination deviceInfo
- Publication number
- JPS56147574A JPS56147574A JP5125980A JP5125980A JPS56147574A JP S56147574 A JPS56147574 A JP S56147574A JP 5125980 A JP5125980 A JP 5125980A JP 5125980 A JP5125980 A JP 5125980A JP S56147574 A JPS56147574 A JP S56147574A
- Authority
- JP
- Japan
- Prior art keywords
- data
- ghost
- maximum value
- counters
- memory section
- 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 avoid production of an unnecessary ghost, by comparing the count value of two counters provided at the maximum value detection section and stopping the ghost detecting operation after the data for ghost erasing is obtained. CONSTITUTION:The data having maximum value of ghost removal is detected among the data of each memory section of the tap gain memory section A8 at the maximum value detection 11, and this data is subtracted from the data before inputting the signal obtained from the input to the 1 vertical period delay circuit 13 at the subtractor 12, the clock pulse is introduced to the 1st counter 17 with the positive output signal of the subtractor 12, and the clock pulse is introduced to the 2nd counter 18 with the negative output signal. The count value for both the counters 17, 18 is compared at the comparator 19 every synchronizing period. If the ratio is more than the specified ratio, the reset pulse for both the counters is output. If within a given ratio, the pulse to store the memory data of the tap gain memory section A8 is output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5125980A JPS56147574A (en) | 1980-04-18 | 1980-04-18 | Ghost elimination device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5125980A JPS56147574A (en) | 1980-04-18 | 1980-04-18 | Ghost elimination device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56147574A true JPS56147574A (en) | 1981-11-16 |
Family
ID=12881941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5125980A Pending JPS56147574A (en) | 1980-04-18 | 1980-04-18 | Ghost elimination device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56147574A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59147580A (en) * | 1983-02-14 | 1984-08-23 | Hitachi Ltd | Ghost eliminating device |
-
1980
- 1980-04-18 JP JP5125980A patent/JPS56147574A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59147580A (en) * | 1983-02-14 | 1984-08-23 | Hitachi Ltd | Ghost eliminating device |
JPH0516227B2 (en) * | 1983-02-14 | 1993-03-03 | Hitachi Ltd |
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