GB1434135A - Magnetic tape reproducing system - Google Patents
Magnetic tape reproducing systemInfo
- Publication number
- GB1434135A GB1434135A GB2934373A GB2934373A GB1434135A GB 1434135 A GB1434135 A GB 1434135A GB 2934373 A GB2934373 A GB 2934373A GB 2934373 A GB2934373 A GB 2934373A GB 1434135 A GB1434135 A GB 1434135A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heads
- head
- signals
- flip
- june
- 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
- 230000001360 synchronised effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/783—Adaptations for reproducing at a rate different from the recording rate
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/14—Masking or switching periodically, e.g. of rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
- H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
1434135 Television MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 20 June 1973 [20 June 1972] 29343/73 Heading H4F [Also in Divisions G4-G6] Video playback apparatus includes rotary heads whose output is supplied via rotary transformers 24-29 and which are sequentially switched under control of vertical synchronizing signals in the reproduced signal and a signal representative of the angular position of the heads, to produce slow-motion reproduction of fields on the tape. The transformers have fixed cores 27-29 and rotating cores 24-26 connected to the heads. The head signals are amplified at 32-34, combined at 38 and demodulated at 40 before the vertical synchronized signals are separated at 42 and applied to the trigger inputs T of J-K flip-flops 45-47 forming a ring counter 44. A reset pulse is applied to their set inputs 5 once every head revolution from a transducer 50 responsive to a magnet 48 on a disc 49 rotating with the heads. The flip-flop outputs are applied to transistors 35-37 to switch the head circuits as required. The distance between heads on the tape is slightly greater than two field lengths. The arrangement is similar to that of Specification 1,376,707.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7358772U JPS5228979Y2 (en) | 1972-06-20 | 1972-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1434135A true GB1434135A (en) | 1976-05-05 |
Family
ID=13522576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2934373A Expired GB1434135A (en) | 1972-06-20 | 1973-06-20 | Magnetic tape reproducing system |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5228979Y2 (en) |
AU (1) | AU461022B2 (en) |
CA (1) | CA1028770A (en) |
DE (1) | DE2330886C2 (en) |
FR (1) | FR2189965B1 (en) |
GB (1) | GB1434135A (en) |
IT (1) | IT986179B (en) |
NL (1) | NL7308526A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5436709A (en) * | 1977-08-26 | 1979-03-17 | Sony Corp | Position control circuit for rotary magnetic head |
DE3045541A1 (en) * | 1980-12-03 | 1982-07-01 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD AND ARRANGEMENT FOR THE PLAYBACK OF VIDEO SIGNALS RECORDED ON A RECORDING CARRIER IN INDIVIDUAL TRACKS |
DE3319878C1 (en) * | 1983-06-01 | 1985-01-03 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co KG, 8510 Fürth | Arrangement of a rotary transformer in a video device |
DE3517380A1 (en) * | 1985-05-14 | 1986-11-20 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Method of track finding |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294902A (en) * | 1963-12-30 | 1966-12-27 | Ampex | Fast, slow and stop motion reproduction using longitudinal recording and rotating heads |
GB1060147A (en) * | 1964-08-04 | 1967-03-01 | Rank Bush Murphy Ltd | Transducer head switching arrangements |
DE1437684A1 (en) * | 1965-12-24 | 1968-10-31 | Grundig Emv | Device on magnetic tape recorders for temporal stretching or gathering of video signals |
DE1762475A1 (en) * | 1968-06-22 | 1970-06-18 | Telefunken Patent | Arrangement for phase-accurate speed control of a rotating shaft |
-
1972
- 1972-06-20 JP JP7358772U patent/JPS5228979Y2/ja not_active Expired
-
1973
- 1973-06-14 DE DE19732330886 patent/DE2330886C2/en not_active Expired
- 1973-06-19 IT IT5089773A patent/IT986179B/en active
- 1973-06-19 FR FR7322312A patent/FR2189965B1/fr not_active Expired
- 1973-06-19 CA CA174,453A patent/CA1028770A/en not_active Expired
- 1973-06-19 NL NL7308526A patent/NL7308526A/xx unknown
- 1973-06-20 GB GB2934373A patent/GB1434135A/en not_active Expired
- 1973-06-29 AU AU57559/73A patent/AU461022B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5228979Y2 (en) | 1977-07-02 |
JPS4931321U (en) | 1974-03-18 |
DE2330886C2 (en) | 1987-07-09 |
DE2330886A1 (en) | 1974-01-10 |
CA1028770A (en) | 1978-03-28 |
FR2189965B1 (en) | 1978-05-26 |
AU5755973A (en) | 1975-01-09 |
NL7308526A (en) | 1973-12-27 |
AU461022B2 (en) | 1975-05-15 |
IT986179B (en) | 1975-01-20 |
FR2189965A1 (en) | 1974-01-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |