JPS54162923A - Automatic ghost elimination circuit - Google Patents
Automatic ghost elimination circuitInfo
- Publication number
- JPS54162923A JPS54162923A JP7255478A JP7255478A JPS54162923A JP S54162923 A JPS54162923 A JP S54162923A JP 7255478 A JP7255478 A JP 7255478A JP 7255478 A JP7255478 A JP 7255478A JP S54162923 A JPS54162923 A JP S54162923A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- ghost
- signals
- coefficient
- output
- 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 obtain an automatic ghost elimination circuit which can carry out algorism effectively in case the residual ghost in the video signal is detected and then a digital control is given to the coefficient value of the coefficient circuit to reduce the residual ghost down to zero. CONSTITUTION:The intermediate frequency amplification output in the video signal is compounded with the direct wave and the ghost wave and undergoes the phase detection by two detection axis signals of different phases which are obtained by extracting the carrier wave. The two output are added together via each coefficient circuit and then delayed to be added with the detection output of one side. As a result, both the in-phase component and the orthogonal component of the ghost wave can be eliminated. Coefficient value setting circuit 14a and 14b function as the reversible counters to observe the sampling signals of output signals v1 and v2. And if the sampling signals are positive, they are applied to count-down input CD; while the negative signals are applied to count-up input CU respectively. Thus, coefficient circuit 6A and 6B are controlled, and AND circuit 16A and 16B plus 17A and 17B detect the maximum and minimum value each.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255478A JPS54162923A (en) | 1978-06-14 | 1978-06-14 | Automatic ghost elimination circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255478A JPS54162923A (en) | 1978-06-14 | 1978-06-14 | Automatic ghost elimination circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54162923A true JPS54162923A (en) | 1979-12-25 |
Family
ID=13492683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7255478A Pending JPS54162923A (en) | 1978-06-14 | 1978-06-14 | Automatic ghost elimination circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54162923A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57185727A (en) * | 1981-05-12 | 1982-11-16 | Victor Co Of Japan Ltd | Rejector for waveform distortion |
| JPS5887980A (en) * | 1981-11-19 | 1983-05-25 | Matsushita Electric Ind Co Ltd | Ghost eliminating device |
| JPS62159985A (en) * | 1985-12-24 | 1987-07-15 | アールシーエー トムソン ライセンシング コーポレイシヨン | Ghost eliminator |
-
1978
- 1978-06-14 JP JP7255478A patent/JPS54162923A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57185727A (en) * | 1981-05-12 | 1982-11-16 | Victor Co Of Japan Ltd | Rejector for waveform distortion |
| JPH021430B2 (en) * | 1981-05-12 | 1990-01-11 | Victor Company Of Japan | |
| JPS5887980A (en) * | 1981-11-19 | 1983-05-25 | Matsushita Electric Ind Co Ltd | Ghost eliminating device |
| JPH0211066B2 (en) * | 1981-11-19 | 1990-03-12 | Matsushita Electric Ind Co Ltd | |
| JPS62159985A (en) * | 1985-12-24 | 1987-07-15 | アールシーエー トムソン ライセンシング コーポレイシヨン | Ghost eliminator |
| JPH06101811B2 (en) * | 1985-12-24 | 1994-12-12 | アールシーエー トムソン ライセンシング コーポレイシヨン | Multi-ghost cancellation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5580966A (en) | Noise eliminating system for television signal | |
| JPS5564477A (en) | Television receiver | |
| JPS54162923A (en) | Automatic ghost elimination circuit | |
| JPS5531342A (en) | Receiving device | |
| JPS53118927A (en) | Video detecting unit | |
| JPS54128258A (en) | Fm detection circuit | |
| JPS5232655A (en) | Logic low-pass filter circuit | |
| JPS5630369A (en) | Audio signal delay compensator | |
| SE7910617L (en) | PHASE FOLLOWING CIRCUIT | |
| GB1518006A (en) | Frequency-selective signal receiver | |
| JPS555587A (en) | Automatic ghost rejection circuit | |
| JPS5635539A (en) | Noise eliminating method | |
| JPS5448287A (en) | Digital logic circuit | |
| JPS562758A (en) | Automatic correcting system for fm signal transmission distortion | |
| JPS5353216A (en) | Synchronous detector circuit of video intermediate frequency signal | |
| JPS5254328A (en) | Beam index-type color television receiver | |
| JPS5675711A (en) | Detection circuit for difference between frequencies | |
| JPS5585176A (en) | Noise suppression unit | |
| JPS5484964A (en) | Detector of amplitude-modulated wave | |
| JPS5525279A (en) | Automatic frequency tuning defeat device | |
| JPS5516534A (en) | Fm receiver | |
| JPS5561111A (en) | Automatic frequency control circuit | |
| ES485497A1 (en) | AFT circuit | |
| JPS5644212A (en) | Agc circuit | |
| JPS55124315A (en) | Automatic gain control circuit |