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 ...

Gunter Oberjatzas, Werner Keesen, Jean Yves Catros, Christian J Richard: Method for recording and/or reproducing digitally coded signals with interframe and interframe coding. November 6, 1990: US04969055 (26 worldwide citation)

A method for recording and/or reproducing digitally coded video signals. A frame sequence is coded in such a way that an intraframe coded picture having a fixed or variable block length is recorded at the beginning. A fixed number of interframe coded pictures follow. The block length of the interfra ...

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.

Hans Joachim Platte, Walter Voessing, Gunter Oberjatzas, Ernst Schroder: System for compensating signal interference in a PCM audio transmission. Telefunken Fernseh und Rundfunk, Spencer & Frank, May 20, 1986: US04590531 (5 worldwide citation)

A pulse code modulated audio signal transmission system which compensates for signal interference in the pulse code modulated audio signal. The system includes a first device for receiving an audio signal and for converting the audio signal into a pulse code modulated audio signal, and a second devi ...

Gunter Oberjatzas, Heinz Werner Keesen: Arrangement for indicating angular position of headwheel disk in a tape recorder. Deutsche Thomson Brandt, Spencer & Frank, May 29, 1990: US04930025 (4 worldwide citation)

A device for transferring signals between itself and a record carrier tape, the device including a rotating head wheel disk, at least one head disposed on the rotating head wheel disk, a sensor and a signal emitter to indicate the position of the head wheel disk, the improvement wherein the signal e ...