Title:
【発明の名称】信号処理システム
Document Type and Number:
Japanese Patent JP3140774
Kind Code:
B2
Abstract:
First and second field type detectors for first and second video signals have outputs indicating whether the video signals have first or second field types. The first video signal is synchronized with the second video signal for a combined display by a synchronous field memory and an asynchronous multiple line memory. The field type of the second video signal is changed when necessary to match the field type of the first video signal to maintain interlace integrity in the combined display. A field type changing circuit, which controls the synchronizing, has a first mode of operation which delays writing a current field of the first field type by one horizontal line period, a second mode of operation which advances writing a current field of the second field type by one horizontal line period and a third mode of operation which maintains a current field type. A comparison of the field type of the second signal to the field type of the first signal results in an output signal indicating one of a plurality of comparison outcomes, wherein the first and second video signals have the same field type, wherein the first video signal has the first field type and the second video signal has the second field type and wherein the first video signal has the second field type and the second video signal ha the first field type. A plurality of selectable interlace correction signals are generated, each being appropriate for one of the plurality of comparison outcomes.
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Inventors:
Rohmsburg, Eritsk Douglas
Arsons, Nataniel Hulk
Karl Francis Hollander
Sergeyer, Timothy William
Arsons, Nataniel Hulk
Karl Francis Hollander
Sergeyer, Timothy William
Application Number:
JP51047791A
Publication Date:
March 05, 2001
Filing Date:
May 30, 1991
Export Citation:
Assignee:
Thomson Consumer Electronics Incorporated
International Classes:
H04N5/46; G06F3/00; G06T3/40; G09G5/00; G09G5/14; G09G5/377; G09G5/391; H04N3/223; H04N3/227; H04N3/27; H04N5/073; H04N5/14; H04N5/262; H04N5/265; H04N5/44; H04N5/45; H04N7/00; H04N7/01; H04N7/015; H04N7/26; H04N9/64; H04N11/06; H04N11/20; H04N11/24; (IPC1-7): H04N7/01; H04N5/14; H04N7/24; H04N11/20
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)