Motion compensation for interlaced digital television signals
Patent 5093720 Issued on March 3, 1992. Estimated Expiration Date: 
August 20, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 20, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInter-frame coding apparatus for video signal Method of coding a video signal for transmission in a restricted bandwidth Circuit implementation of block matching algorithm Method of and arrangement for motion detection in an interlaced television picture obtained after film-to-television conversion Patent #: 4933759 InventorsAssigneeApplicationNo. 570157 filed on 08/20/1990US Classes:348/452, Motion adaptive348/699, Motion vector generation375/240.14, Plural375/240.16Motion vectorExaminersPrimary: Groody, James J.Assistant: Lee, Michael G. Attorney, Agent or FirmInternational ClassesH04N 007/12H04N 007/00 AbstractMotion compensated coding of interlaced digital video signals is provided. Pixel data from successive interlaced video fields is compared to similarly situated pixel data in a plurality of previous fields to find a preferred counterpart for each current field set of pixel data. A prediction error signal is generated for each current field set of pixel data indicative of the difference between it and its preferred counterpart from a previous field. Each prediction error signal is encoded with data indicative of the previous field in which the preferred counterpart can be found. In a preferred embodiment, each set of current field pixel data is compared to a range of similarly situated pixels in each of the previous fields, and the prediction error signal is also encoded with motion vector data indicative of the location of the preferred counterpart in its previous field.Other References
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