Television apparatus with automatic selection and processing of video input signals of composite and non-composite form
December 20, 2011. 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 ReferencesTelevision receiver with video changeover switch responsive to channel selector Video apparatus for selectively processing either composite or component color video signals Automatic air/cable mode selection apparatus for a television tuner Video switching apparatus having interference prevention feature Video source selecting system System for connecting a video signal recording/reproducing apparatus and a television receiver Automatic connection system on a color TV S-VHS input Patent #: 5134483 InventorAssigneeApplicationNo. 812590 filed on 12/20/1991US Classes:348/706, receiver type348/554, Multimode (e.g., composite, Y, C; baseband RF)348/708Color television signal processingExaminersPrimary: Groody, James J.Assistant: Murrell, Jeffrey S. Attorney, Agent or FirmForeign Patent References
International ClassH04N 009/64Foreign Application Priority Data1989-06-23 DEAbstractA television system comprises a first input terminal (20) for providing a composite video (CSCC) signal or a separated luminance (SCC) signal, and a second input terminal (15) for providing a separated chrominance (C) signal. A change-over switch (11) has a first input (a) coupled to the first input terminal (20) through a path including a color sub-carrier filter (9), a second input (b) coupled to the second input terminal (15) through a path not including the color sub-carrier filter (9), and an output (c) coupled to the input (d) of a color decoder (8). The change-over switch couples the input (d) of the color decoder (8) to the first input terminal (20) in a first position (a), and couples the input (d) of the color decoder (8) to the second input terminal (15) in a second position (b). A sub-carrier detector (CK) is coupled to the output (c) of the change-over switch (11) for detecting the presence or absence of a color sub-carrier. A control unit initially causes the change-over switch ( 11) to be in the first position (a) and thereafter causes said change-over switch (11) to remain in the first position (a) if a color sub-carrier is present at the output (c) of the change-over switch (11), but causes the change-over switch (11) to be in the second position (b) if a color sub-carrier is not present. Once the change-over switch (11) is in the second position (b), the control unit (1) causes said change-over switch (11) to be switched back to said first position (a) from said second position (b) if a color sub-carrier is still not present.Other References
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