GB931525A - Systems for preventing drop-out in video tape reproduction - Google Patents
Systems for preventing drop-out in video tape reproductionInfo
- Publication number
- GB931525A GB931525A GB3871860A GB3871860A GB931525A GB 931525 A GB931525 A GB 931525A GB 3871860 A GB3871860 A GB 3871860A GB 3871860 A GB3871860 A GB 3871860A GB 931525 A GB931525 A GB 931525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- over
- path
- drop
- signals
- amplifier
- 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
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
- H04N5/94—Signal drop-out compensation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
931,525. Television. TOKYO SHIBAURA ELECTRIC CO. Ltd. Nov. 10, 1960 [Nov. 20, 1959], No. 38718/60. Class 40 (3). " Drop-out " in video signals derived from a magnetic recording (i.e. loss of signals due to pin-holes &c.) is compensated by substituting, during " drop-out " periods, signals from corresponding portions of a preceding or succeeding line. Fig. 2 shows an embodiment of the invention in which video signals comprising a frequency or phasemodulated carrier derived from a magnetic record are supplied, via amplifier 6, over a direct path and over a path including a delay device 7 (introducing a delay of one scanning line period) and amplifier 8, to an electronic switch 9, which is operated by a switching signal from a device 10, responsive to " drop-out " of video signals from amplifier 6, to change-over the connection of the output circuit, supplying limiter amplifier 11 and discriminator 12, from one input path to the other. In this manner the " drop-out " is compensated by the addition of video signals from corresponding portions of the preceding line if the change-over is from the direct-path to the path including the delay device 7 whilst, if the change-over is from the latter to the former path, the compensation is effected by signals from the succeeding line.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3601959 | 1959-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB931525A true GB931525A (en) | 1963-07-17 |
Family
ID=12458010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3871860A Expired GB931525A (en) | 1959-11-20 | 1960-11-10 | Systems for preventing drop-out in video tape reproduction |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1202315B (en) |
| GB (1) | GB931525A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3553390A (en) * | 1966-09-17 | 1971-01-05 | Fenseh Gmbh | Circuit arrangement for suppressing switch transients in devices for the magnetic storage of video signals employing a plurality of magnetic heads |
| US3629494A (en) * | 1969-08-18 | 1971-12-21 | Rca Corp | Signal processor for dropout correction before demodulation |
| US4157567A (en) * | 1976-09-11 | 1979-06-05 | Ted Bildplatten Aktiengesellschaft Aeg-Telefunken-Teldec | Dropout detecting circuitry for a frequency modulated carrier, particularly for a video recorder |
| GB2150000A (en) * | 1983-11-01 | 1985-06-19 | Pioneer Electric Corp | Noise elimination in an fm demodulator |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1291358B (en) * | 1967-02-16 | 1969-03-27 | Fernseh Gmbh | Circuit arrangement for compensating for the timing error in a color television signal taken from a memory |
| GB1374293A (en) * | 1970-12-11 | 1974-11-20 | Sony Corp | Video signal reproducing systems |
| FR2303426A1 (en) * | 1975-03-04 | 1976-10-01 | Thomson Brandt | PROCESS FOR PROTECTION AGAINST DEEP BLOODING OF TRANSMISSION CHANNELS, RECORDINGS AND EQUIPMENT FOLLOWING THIS PROCESS |
| SE430455B (en) * | 1978-04-21 | 1983-11-14 | Nippon Telegraph & Telephone | RECEIVER DEVICE WITH THE FUNCTION TO COMPRESS NOISE DURING Sudden Interruptions |
| DE3310824A1 (en) * | 1983-03-24 | 1984-09-27 | Zdzislaw Toronto Ontario Gulczynski | Video processor |
| US5398114A (en) * | 1991-09-20 | 1995-03-14 | Samsung Electronics Co., Ltd. | Circuit for compensating for the drop-out of a reproduced video signal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2353631A (en) * | 1941-10-02 | 1944-07-18 | Rca Corp | Image reproducing apparatus |
-
1960
- 1960-11-10 GB GB3871860A patent/GB931525A/en not_active Expired
- 1960-11-11 DE DET19263A patent/DE1202315B/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3553390A (en) * | 1966-09-17 | 1971-01-05 | Fenseh Gmbh | Circuit arrangement for suppressing switch transients in devices for the magnetic storage of video signals employing a plurality of magnetic heads |
| US3629494A (en) * | 1969-08-18 | 1971-12-21 | Rca Corp | Signal processor for dropout correction before demodulation |
| US4157567A (en) * | 1976-09-11 | 1979-06-05 | Ted Bildplatten Aktiengesellschaft Aeg-Telefunken-Teldec | Dropout detecting circuitry for a frequency modulated carrier, particularly for a video recorder |
| GB2150000A (en) * | 1983-11-01 | 1985-06-19 | Pioneer Electric Corp | Noise elimination in an fm demodulator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1202315B (en) | 1965-10-07 |
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