1
Hans Joachim Platte, Gunter Oberjatzas, Walter Vossing: Remote control device for controlling various functions of one or more appliances. Telefunken Fernseh und Rundfunk, Spencer & Frank, March 1, 1988: US04728949 (216 worldwide citation)

A remote control unit, particularly for a television receiver or a video tape recorder, having a limited number of keys which have different functions that are identified by lettering presented on display elements corresponding to the keys, depending upon which appliance is selected for control. The ...


2
Hans Dieter Sander, Wulf Christian Streckenbach: Decoder for a frequency-keyed signal, particularly an FSK-video text signal. Telefunken Fernseh und Rundfunk, Spencer & Frank, March 10, 1987: US04649551 (76 worldwide citation)

Decoder for a frequency keyed signal, particularly an FSK videotext signal. To avoid isochronous distortions, precise matching of the decoder is necessary. Due to the provision of a additional AFC circuit (11) to regulate the natural frequency of the VCO (5) in the PLL loop (3-5) of the decoder, suc ...


3
Hartmut Kollner: Transducer circuit with adjustable output impedance. Telefunken Fernseh und Rundfunk, Joseph S Tripoli, Eric P Herrmann, October 3, 1995: US05455533 (33 worldwide citation)

An impedance converter includes an emitter follower constructed of a first transistor with a first resistor connected between an emitter electrode of the first transistor and an output terminal. Input to the emitter follower is provided by a second transistor of complementary type, with input signal ...


4
Gerhard Holoch: Television system providing wide aspect ratio image information compatible with a standard aspect ratio format. Telefunken Fernseh und Rundfunk, Joseph S Tripoli, Eric P Herrmann, Ronald H Kurdyla, July 27, 1993: US05231491 (26 worldwide citation)

A television signal processing system develops a television signal containing wide aspect ratio image information which is compatible with a standard aspect ratio television format. One image line is separated from every group of four successive image lines. The remaining image lines are vertically ...


5
Bernd Edler: Method for transmitting a signal. Telefunken Fernseh und Rundfunk, Spencer Frank & Schneider, May 25, 1993: US05214742 (24 worldwide citation)

Transmitting a signal wherein the signals is segmented by means of windows into successive overlapping blocks, the partial signals contained in the blocks are converted by transformation into a spectrum, with the spectra then being coded, transmitted, decoded after transmission and converted back in ...


6
Heinz Werner Keesen, Gunter Oberjatzas, Hartmut Peters: Digital data transmission method. Telefunken Fernseh und Rundfunk, Spencer & Frank, September 15, 1987: US04694336 (22 worldwide citation)

A method for transmitting digital video signals wherein spectral values are sorted according to magnitude and leading zeros are suppressed. In this way, the average word per pixel length can be reduced to about 1 bit, with image quality remaining acceptable.


7
Thomas Vaupel, Detlef Krahe: Process for transmitting a signal. Telefunken Fernseh und Rundfunk, Joseph S Tripoli, Eric P Herrmann, Ronald H Kurdyla, November 1, 1994: US05361278 (19 worldwide citation)

A method of transmitting an analog signal including the steps of converting the analog signal into a digital signal and using windows to subdivide the digital signal into successive blocks. The blocks are evaluated for level changes, and when a level change is below a predetermined level the blocks ...


8
Wilfried von der Ohe: Switched mode power supply. Telefunken Fernseh und Rundfunk, Spencer & Frank, June 17, 1986: US04595977 (18 worldwide citation)

A switched mode power supply, particularly for a television receiver with standby operation, including a protection circuit for limiting the current on the primary side of the power supply transformer and preferably also a protection circuit against too high a voltage on the secondary side of the tr ...


9
Gerhard Eitz, Gerhard Moll: Method for transmitting periodically repeated teletext data in a television receiver. Telefunken Fernseh und Rundfunk, Spencer Frank & Schneider, October 11, 1994: US05355170 (16 worldwide citation)

In order to compatibly transmit teletext data in the form of special characters, fine textures and color hues at higher WST levels, complementary data in the form of one or more associated complementary pages are transmitted for each page of teletext by the broadcaster in addition to the basic telet ...


10
Karl Heinz Thiele, Werner Stehn, Gunter Wirth: Loudspeaker unit with means for releasably fastening loudspeaker chassis is to its frame. Telefunken Fernseh und Rundfunk, NEWEK Neue Elektronik Werke, Wirth Elektronik, Spencer & Frank, June 21, 1988: US04752962 (9 worldwide citation)

Loudspeaker unit including a frame (FIG. 2) serving as sound guide to which the loudspeaker chassis (FIG. 1) is releasably fastened. According to the invention, form-locking cooperating detent means (4-6, 29-31) are provided on the frame and on the loudspeaker chassis. The loudspeaker chassis can be ...