Company Filing History:
9 out of 21,361 
1 out of 56 Years Active: 2002-2008
Title: The Innovations of Antonius A C M Kalker
Introduction
Antonius A C M Kalker is a notable inventor based in Eindhoven, Netherlands. He has made significant contributions to the field of video signal processing, holding a total of 10 patents. His work primarily focuses on watermark detection and video signal transmission technologies.
Latest Patents
One of Kalker’s latest patents involves the detection of a watermark in a compressed video signal. This method and arrangement for detecting an embedded watermark in an MPEG compressed signal utilizes a modified baseband video signal suitable for watermark detection. A plurality of pictures with the embedded watermark is accumulated in the transform domain, and the inverse DCT is applied to the accumulated result. Conventional watermark detection is then applied to the accumulated plurality of pictures in the spatial domain.
Another significant patent pertains to video signal transmission. Kalker developed an MPEG video stream generator that contains several slightly different programs, each with approximately the same content. The MPEG stream is constructed in such a manner that a simple transcoder can effectively select one of the programs. This is achieved by storing the differences relative to the default program in selected user data fields. The transcoder functions as an MPEG bitstream parser, replacing bits corresponding to a selected set of macroblocks with replacement data stored in the user data fields. This innovation has applications in broadcasting television programs and implementing copy-protection schemes.
Career Highlights
Throughout his career, Kalker has worked with prominent companies such as Koninklijke Philips Corporation N.V. and Koninklijke Philips Electronics N.V. His experience in these organizations has allowed him to develop and refine his innovative ideas in video technology.
Collaborations
Kalker has collaborated with notable individuals in his field, including Jaap Andre Haitsma and Geert F G Depovere. These collaborations have contributed to the advancement of his research and the successful implementation of his patents.
Conclusion
Antonius A C M Kalker is a distinguished inventor whose work in watermark detection and video signal transmission has made a significant impact in the field of video technology. His contributions continue to influence advancements in the industry.
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