Title:
METHOD AND DEVICE FOR IMPROVING QUALITY OF IMAGE BY DPCM CODING
Document Type and Number:
Japanese Patent JPS6085690
Kind Code:
A
Abstract:
A method for improving picture quality given DPCM coded television signals provides for the determination of an activity criterion from the video values of the same television field which surround a current sample and the video signal values of the preceding television field by calculation of the intensity differences between the video signal values. The estimated value is determined from the video signal values of the most recent television field, from the video signal values of the most recent and current television fields, or only from the video signal values of the current television fields, as a function of two thresholds.
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Inventors:
AREKUSANDAA SHIYUTARUKU
Application Number:
JP19074584A
Publication Date:
May 15, 1985
Filing Date:
September 13, 1984
Export Citation:
Assignee:
SIEMENS AG
International Classes:
H04B14/06; H04N7/32; H04N7/36; H04N19/503; (IPC1-7): H04N7/137
Attorney, Agent or Firm:
Toshio Yano