DE755706C - Method for generating line characters and alternating picture characters in television broadcasters - Google Patents
Method for generating line characters and alternating picture characters in television broadcastersInfo
- Publication number
- DE755706C DE755706C DER104698D DER0104698D DE755706C DE 755706 C DE755706 C DE 755706C DE R104698 D DER104698 D DE R104698D DE R0104698 D DER0104698 D DE R0104698D DE 755706 C DE755706 C DE 755706C
- Authority
- DE
- Germany
- Prior art keywords
- characters
- line
- change
- disc
- pulses
- 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
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
Verfahren zur Erzeugung der Zeilen- und Bildwechselzeichen bei Fernsehsendern Bei der Abtastung von Fernsehbildern mittels einer Lochscheibe werden die Synchronisierzeichen bekanntlich ebenfalls durch diese umlaufende Scheibe erzeugt. Die Synchronisieröffnungen oder -schlitze sind auf der Abtastscheibe in einem Kreis angeordnet und lassen beim Umlauf der Scheibe den Lichtstrahl auf die besondere Synchronisierphotozelle fallen. Dadurch werden in der Photozellenanordnung die zur Synchronisierung des Zeilenwechsels dienenden Impulse erzeugt. Zur Synchronisierung des Bildwechsels wiTd: für jeden Bildwechsel bzw. beim Zeilensprungverfahren für jeden Zeilenzugwechsel nur ein einzelner Impuls benötigt. Zur Erzeugung dieser Impulse erhält deshalb die Abtastscheibe einen besonderen Schlitz.Method for generating line and picture characters in television broadcasters When scanning television images by means of a perforated disc, the synchronization characters is also known to be generated by this rotating disk. The synchronization openings or slots are arranged on the scanning disc in a circle and leave the Around the disc, the light beam falls on the special synchronizing photocell. As a result, the line change synchronization in the photocell arrangement serving impulses generated. To synchronize the picture change wiTd: for everyone Picture change or, in the case of interlacing, only one change for each line change Impulse needed. To generate these pulses, the scanning disc is therefore given a special slot.
Es sind Abtastscheiben mit mehreren Lochreihen bekannt, bei deren Verwendung zur vollständigen Abtastung eines jeden Bildes mehrere Umdrehungen der Scheibe erforderlich sind. In diesem Falle würden durch den Schlitz für den Bildwechsel bzw. für den Zeilenzugwechsel je vollständiges Bild mehr Impulse erzeugt werden, als für die Synchronisierung erforderlich sind. Hierfür ist vorgeschlagen worden, die Zahl der so erzeugten Impulse auf die Zahl der gewünschten Impulse durch eine Frequenzteileranordnung herabzusetzen. Eine solche Einrichtung kann jedoch erspart werden, wenn gemäß der Erfindung diese Bildwechsel- bzw. Zeilenzugwechselimpulse nicht auf optischem Wege durch die Scheibenbewegung, sondern elektrisch aus der Klemmenspannung des die Scheibe antreibenden Motors gewonnen werden. Dadurch ist zwischen der Scheibenumdrehung und dem Bildwechselzeichen ein ausreichender Synchronismus gewährleistet. Es ist lediglich erforderlich, aus der Klemmenspannung des Antriebsmotors über eine Einrichtung bekannter Art die sinusförmige Spannung in geeignete Impulse umzuformen, um diese dann zusammen mit den Zeilenimpulsen auf den Sender zu geben. In Fällen, in denen die Frequenz der Motorklemmenspannung das Doppelte der gewünschten Bildwech.selfrequenz ist, ist zur Erzeugung der Bildwechselimpulse eine Halbierung dieser Frequenz erforderlich.There are scanning disks with several rows of holes are known in which Use several revolutions of the to completely scan each image Disc are required. In this case, the image would change through the slot or more impulses are generated for each complete image for the line change, than are required for synchronization. For this it has been suggested the number of pulses generated in this way to the number of desired pulses by a Reduce frequency divider arrangement. Such a facility can however, these image change or line train change pulses are saved according to the invention not optically through the movement of the pane, but electrically from the Terminal voltage of the motor driving the disc can be obtained. This is Sufficient synchronism between the disk rotation and the alternating image sign guaranteed. It is only necessary from the terminal voltage of the drive motor Using a device of a known type, convert the sinusoidal voltage into suitable pulses to reshape them in order to then give them to the transmitter together with the line pulses. In cases where the frequency of the motor terminal voltage is twice the desired Picture change frequency is halved to generate the picture change pulses this frequency is required.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER104698D DE755706C (en) | 1936-11-27 | 1936-11-27 | Method for generating line characters and alternating picture characters in television broadcasters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER104698D DE755706C (en) | 1936-11-27 | 1936-11-27 | Method for generating line characters and alternating picture characters in television broadcasters |
Publications (1)
Publication Number | Publication Date |
---|---|
DE755706C true DE755706C (en) | 1954-11-29 |
Family
ID=7421075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER104698D Expired DE755706C (en) | 1936-11-27 | 1936-11-27 | Method for generating line characters and alternating picture characters in television broadcasters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE755706C (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502058C (en) * | 1929-04-06 | 1930-07-10 | Siemens & Halske Akt Ges | Method for synchronizing commutator motors |
FR699544A (en) * | 1931-09-26 | 1931-02-16 | Westinghouse Electric & Mfg Co | Remote transmission system of images and other objects |
FR793766A (en) * | 1934-10-31 | 1936-01-31 | Rca Corp | Improvements to television systems |
-
1936
- 1936-11-27 DE DER104698D patent/DE755706C/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502058C (en) * | 1929-04-06 | 1930-07-10 | Siemens & Halske Akt Ges | Method for synchronizing commutator motors |
FR699544A (en) * | 1931-09-26 | 1931-02-16 | Westinghouse Electric & Mfg Co | Remote transmission system of images and other objects |
FR793766A (en) * | 1934-10-31 | 1936-01-31 | Rca Corp | Improvements to television systems |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3750807T2 (en) | Method and arrangement for generating video mosaic effects. | |
DE755706C (en) | Method for generating line characters and alternating picture characters in television broadcasters | |
DE2823617A1 (en) | CONTOUR REINFORCEMENT CIRCUIT | |
DE3813682A1 (en) | METHOD AND DEVICE FOR RECORDING A VIDEO FORMAT SIGNAL | |
DE19527522A1 (en) | Acquisition of proton density weighted image and T2 weighted image | |
DE3786611T2 (en) | METHOD FOR MEASURING CROSS-SPEED NOISE IN A PLAYBACK INFORMATION SIGNAL. | |
DE1537299B1 (en) | Circuit arrangement for generating PAL color television test signals | |
DE3855210T2 (en) | Device for compatible locking of the horizontal sync pulse with the PAL color subcarrier | |
DE2057456A1 (en) | Method and circuit arrangement for displaying characters, in particular writing characters | |
DE702475C (en) | Device for generating impulses or vibrations using a rotating generator | |
DE731663C (en) | Method for separating the pulses of the lower frequency from a pulse train consisting of pulses of higher and lower basic frequency | |
DE2346441C3 (en) | Deflection device for a cathode ray tube | |
DE1202316B (en) | Device for reproducing video signals stored on magnetic tape | |
DE595863C (en) | Image transmission method in which the frequency generated by interrupting the scanning beam is used for synchronization | |
DE1190976B (en) | Standards converter for television signals | |
DE754288C (en) | Synchronization method for television purposes using pulses of the same amplitude and different duration | |
DE748742C (en) | Television broadcasting method in which the picture modulation is given from one side and the picture change synchronization pulses from the other side of a fixed value (black value or value of greatest brightness) | |
DE731198C (en) | Method for generating an electrical signal voltage with a uniformly graduated curve | |
DE553635C (en) | Procedure for synchronizing rotating parts | |
DE1424492A1 (en) | Signal processing device | |
DE3914975C2 (en) | ||
DE748158C (en) | Method for transmitting picture change and line synchronization pulses, which have the same amplitudes, in television broadcasts | |
DE572140C (en) | ||
AT158207B (en) | Synchronization of disc splitters. | |
DE614918C (en) | Procedure for television |