DE575355C - Method for the transmission of images - Google Patents
Method for the transmission of imagesInfo
- Publication number
- DE575355C DE575355C DE1930575355D DE575355DD DE575355C DE 575355 C DE575355 C DE 575355C DE 1930575355 D DE1930575355 D DE 1930575355D DE 575355D D DE575355D D DE 575355DD DE 575355 C DE575355 C DE 575355C
- Authority
- DE
- Germany
- Prior art keywords
- function
- transmission
- images
- transformer
- image
- 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
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
- H04N3/32—Velocity varied in dependence upon picture information
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Networks Using Active Elements (AREA)
- Eye Examination Apparatus (AREA)
Description
In dem Hauptpatent ist ein Verfahren zur Übertragung von Bildern angegeben, bei dem an Stelle der von dem zu übertragenden Bild ursprünglich gegebenen Funktion, nämlich der Helligkeitsverteilung über die abzutastende Linie, eine Funktion übertragen wird, die von den wechselnden Eigenschaften der einzelnen abgetasteten Bildteile abhängt, z. B. das Integral der HelHgkeitswerte.In the main patent, a method for transferring images is specified in which instead of the function originally given by the image to be transmitted, namely the brightness distribution over the line to be scanned, a function is transferred, which depends on the changing properties of the individual scanned image parts, e.g. B. the integral of the helicity values.
ίο Die vorliegende Erfindung betrifft nun eine Erweiterung des Hauptpatents dahingehend, daß an Stelle der ursprünglich gegebenen Funktion oder des Integrals derselben eine beliebig andere hiervon abgeleitete Funktion übertragen wird. Bietet in einem besonderen Fall eine abgeleitete Funktion gegenüber der ursprünglich gegebenen bei der Übertragung von Bildern besondere Vorteile, so ist am Sender entweder die Abtastvorrichtung derart auszubilden, daß die Modulation entsprechend der gewünschten Ableitung der Funktion erfolgt, oder es ist zwischen Abtastvorrichtung und Übertragungsmittel eine Vorrichtung zu schalten, welche die ursprünglich gegebene Funktion in ihre Ableitung verwandelt. Bei dem Empfänger ist dann entweder die Bildzusammensetzungsvorrichtung derart auszugestalten, daß die Helligkeitsverteilung im erzeugten Bild der ursprünglichen Funktion entspricht, wenn die Ableitung von dieser auf die Bildzusammerisetzungsvorrichtung 'einwirkt, oder es ist hier ebenfalls eine' Vorrichtung zwischen Übertragungsmittel und Empfänger zu schalten, welche die Ableitung wieder in die Ursprungliehe Funktion zurückverwandelt.ίο The present invention now relates to an extension of the main patent to the effect that instead of the originally given function or its integral, any other one derived from it Function is transferred. Provides a derived function in a special case compared to the originally given advantages for the transmission of images, so either the scanning device is to be designed on the transmitter in such a way that the modulation takes place according to the desired derivative of the function, or it is between Scanning device and transmission means to switch a device, which the originally given function in their Derivative transformed. The receiver is then either the image composer designed in such a way that the brightness distribution in the generated image of the corresponds to the original function when the derivation of this is applied to the image compositor 'acts, or it is here also a' device between transmission means and to switch receivers, which return the derivation to the original Function converted back.
Die Hilfsmittel hierfür sind bekannt, so daß ein kurzes Beispiel zur Erläuterung genügt: The aids for this are known, so a short example is sufficient for explanation:
Es soll an Stelle der ursprünglich gegebenen Funktion der H elligkeits verteilung über die Linienkoordinate der Differentialquotient dieser Funktion zur Übertragung benutzt werden. In diesem Falle dient zur Bildzerlegung eine beliebige der bekannten Fernsehabtastvorrichtungen für Helligkeitssteuerung. Zwischen diese Abtastvorrichtung und das Übertragungsmittel wird dann ein Transformator geschaltet, der primär in Reihe mit einem Ohmschen Widerstand Hegt, dessen Widerstandswert groß gegen die Selbstinduktion des Transformators ist. Ist die ursprüngliche Funktion dann als Spannungsmodulation gegeben, so ist der Strom in der Primärwicklung des Transformators proportional der gegebenen Modulation. In bekannter Weise ist dann die Spannung an der Sekundär- B wicklung dieses Transformators proportional dem Differentialquotienten des Stromes der Primärwicklung und damit proportional dem Differentialquotienten der ursprünglichen Funktion. Wenn als Empfänger eines der bekannten Bildzusammensetzungssysteme für Helligkeitssteuerung verwendet wird,, dann istInstead of the originally given function of the brightness distribution over the line coordinate, the differential quotient of this function should be used for transmission. In this case, any of the known television scanning devices for brightness control is used for image decomposition. A transformer is then connected between this scanning device and the transmission means, which transformer is primarily in series with an ohmic resistor, the resistance of which is large with respect to the self-induction of the transformer. If the original function is then given as voltage modulation, the current in the primary winding of the transformer is proportional to the given modulation. The voltage is then at the secondary winding of this transformer B is proportional to the differential quotient of the current of the primary winding and thus proportional to the differential quotient of the original function in known manner. If one of the known picture composition systems for brightness control is used as the receiver, then is
demselben ein Kondensator vorzuschalten, der in bekannter Weise eine Summation der ankommenden Ströme vornimmt. Wird durch eine vorgeschaltete Röhre bewirkt, daß der Ladestrom bzw. Entladestrom' dieses Kondensators proportional der übertragenen Spannungsmodulation ist, dann wird durch die Summation mittels des Kondensators die ursprüngliche Funktion wiederhergestellt.upstream of the same a capacitor, which in a known manner a summation of the incoming Makes currents. Is caused by an upstream tube that the charge current or discharge current 'this capacitor is proportional to the transmitted voltage modulation, then by the Summation by means of the capacitor restored the original function.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE355319X | 1929-05-18 | ||
DE618976T | 1930-02-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE575355C true DE575355C (en) | 1933-04-27 |
Family
ID=34827953
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930618976D Expired DE618976C (en) | 1929-05-18 | 1930-02-21 | Line control method |
DE1930575355D Expired DE575355C (en) | 1929-05-18 | 1930-04-04 | Method for the transmission of images |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930618976D Expired DE618976C (en) | 1929-05-18 | 1930-02-21 | Line control method |
Country Status (5)
Country | Link |
---|---|
US (1) | US2011737A (en) |
BE (1) | BE370378A (en) |
DE (2) | DE618976C (en) |
FR (2) | FR695622A (en) |
GB (2) | GB355319A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2523156A (en) * | 1947-06-12 | 1950-09-19 | Rca Corp | Vertical sweep voltage correction for film movement in flying spot scansion |
US2547598A (en) * | 1947-09-13 | 1951-04-03 | Zenith Radio Corp | Subscription image transmission system and apparatus |
US2601505A (en) * | 1949-03-23 | 1952-06-24 | Zenith Radio Corp | Subscription type television transmitter |
GB858346A (en) * | 1956-11-20 | 1961-01-11 | Nat Res Dev | Improvements in or relating to television, facsimile and like signal transmission systems |
-
0
- BE BE370378D patent/BE370378A/xx unknown
-
1930
- 1930-02-21 DE DE1930618976D patent/DE618976C/en not_active Expired
- 1930-04-04 DE DE1930575355D patent/DE575355C/en not_active Expired
- 1930-05-12 US US451667A patent/US2011737A/en not_active Expired - Lifetime
- 1930-05-15 GB GB15034/30A patent/GB355319A/en not_active Expired
- 1930-05-15 FR FR695622D patent/FR695622A/en not_active Expired
-
1931
- 1931-02-19 FR FR39782D patent/FR39782E/en not_active Expired
- 1931-02-19 GB GB5325/31A patent/GB377175A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2011737A (en) | 1935-08-20 |
FR695622A (en) | 1930-12-18 |
BE370378A (en) | |
DE618976C (en) | 1935-09-26 |
GB355319A (en) | 1931-08-17 |
GB377175A (en) | 1932-07-19 |
FR39782E (en) | 1932-03-18 |
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