GB1349443A - Comb effect prevention - Google Patents
Comb effect preventionInfo
- Publication number
- GB1349443A GB1349443A GB5854672A GB5854672A GB1349443A GB 1349443 A GB1349443 A GB 1349443A GB 5854672 A GB5854672 A GB 5854672A GB 5854672 A GB5854672 A GB 5854672A GB 1349443 A GB1349443 A GB 1349443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- odd
- line
- adjacent
- lines
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/84—Television signal recording using optical recording
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
- Television Signal Processing For Recording (AREA)
- Studio Circuits (AREA)
- Color Television Systems (AREA)
Abstract
1349443 Recording television pictures ELLANIN INVESTMENTS Ltd 19 Dec 1972 [20 Dec 1971] 58546/72 Heading H4F The production of a comb effect when double interlaced scan video pictures are recorded on motion picture film, which is due to the lateral displacement of a moving object (vertical edge) against a contrasting background during the time interval between an odd-field scan and the interlaced even-field scan which together from a frame on the motion picture film, is prevented by comparing during each even-field scan each line thereof with the preceding even-field line A (comparator 28) and with an adjacent odd-field line D (comparator 40), and by comparing the two odd-field lines B and D adjacent the evenfield line C (comparator 34). If the comparisons show identity between the pair of even-field lines and between the pair of odd-field lines, but a difference between the compared odd and even field lines then selector 44 is actuated to substitute adjacent odd-field information, e.g. a 50-50 interpolation (produced by resistors 45, 47 and clamping amplifiers 49, 51) of adjacent odd-field lines for the even-field line. For all other results of the comparisons the even-field lines are transmitted unchanged. During the odd-field scans all the lines are transmitted unchanged by actuating selector 52 to transmit the output from compensating delay 50 instead of from selector 44. In a basic embodiment each even-field line is compared with an adjacent odd-field line and if there is any difference therebetween an interpolation of the two adjacent odd-field lines or just one of the adjacent odd-field lines is substituted for the even-field line. This basic embodiment does not distinguish between moving vertical interfaces and a horizontal interface. In the recording of a colour video-signal the above processing has to be done separately in the luminance and chroma channels as the phase of the chroma signal between adjacent line of the same fields requires phase inversion before comparison.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20998171A | 1971-12-20 | 1971-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1349443A true GB1349443A (en) | 1974-04-03 |
Family
ID=22781129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5854672A Expired GB1349443A (en) | 1971-12-20 | 1972-12-19 | Comb effect prevention |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3716670A (en) |
| JP (1) | JPS4871127A (en) |
| CA (1) | CA956724A (en) |
| DE (1) | DE2261228C2 (en) |
| FR (1) | FR2169829B1 (en) |
| GB (1) | GB1349443A (en) |
| NL (1) | NL7217375A (en) |
| SU (1) | SU544396A3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469101A (en) * | 1973-03-23 | 1977-03-30 | Dolby Laboratories Inc | Noise reduction systems |
| US4096530A (en) * | 1976-06-17 | 1978-06-20 | General Electric Company | Method and apparatus for obscuring the raster lines in a photograph of a video monitor screen |
| FR2387557A1 (en) * | 1977-04-14 | 1978-11-10 | Telediffusion Fse | NOISE VISIBILITY REDUCTION SYSTEMS ON TELEVISION IMAGES |
| JPS5437528A (en) * | 1977-08-30 | 1979-03-20 | Sony Corp | Processing circuit for video signal |
| US4845557A (en) * | 1988-05-02 | 1989-07-04 | Dubner Computer Systems, Inc. | Field motion suppression in interlaced video displays |
| US5191416A (en) * | 1991-01-04 | 1993-03-02 | The Post Group Inc. | Video signal processing system |
| GB2271239B (en) * | 1992-09-29 | 1996-06-19 | Sony Broadcast & Communication | Video to film conversion |
| US5828786A (en) * | 1993-12-02 | 1998-10-27 | General Instrument Corporation | Analyzer and methods for detecting and processing video data types in a video data stream |
| JP4207009B2 (en) * | 2005-03-09 | 2009-01-14 | ソニー株式会社 | Image processing apparatus and method |
| US8593572B2 (en) * | 2008-01-30 | 2013-11-26 | Csr Technology Inc. | Video signal motion detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3502805A (en) * | 1966-04-23 | 1970-03-24 | Int Standard Electric Corp | Method and apparatus for enhancing the suppressed dot structure of television pictures |
| FR1528714A (en) * | 1966-04-23 | 1968-06-14 | Int Standard Electric Corp | Method of removing dot structure during transmission and reproduction of television pictures |
| DE1271158B (en) * | 1966-04-23 | 1968-06-27 | Standard Elektrik Lorenz Ag | Method for suppressing the point structure during the transmission and / or reproduction of partial television pictures |
-
1971
- 1971-12-20 US US00209981A patent/US3716670A/en not_active Expired - Lifetime
-
1972
- 1972-12-14 DE DE2261228A patent/DE2261228C2/en not_active Expired
- 1972-12-19 FR FR7245220A patent/FR2169829B1/fr not_active Expired
- 1972-12-19 CA CA159,381A patent/CA956724A/en not_active Expired
- 1972-12-19 GB GB5854672A patent/GB1349443A/en not_active Expired
- 1972-12-19 SU SU1868339A patent/SU544396A3/en active
- 1972-12-20 JP JP47128089A patent/JPS4871127A/ja active Pending
- 1972-12-20 NL NL7217375A patent/NL7217375A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| US3716670A (en) | 1973-02-13 |
| SU544396A3 (en) | 1977-01-25 |
| NL7217375A (en) | 1973-06-22 |
| DE2261228A1 (en) | 1973-07-12 |
| DE2261228C2 (en) | 1982-05-06 |
| JPS4871127A (en) | 1973-09-26 |
| FR2169829B1 (en) | 1976-04-23 |
| CA956724A (en) | 1974-10-22 |
| FR2169829A1 (en) | 1973-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |