Video timing display for multi-rate systems
First Claim
1. A video timing display for measuring timing difference between video signals having different rates comprising a graphic display area on a display screen, the graphic display area including a reference indicator associated with one of the video signals and a plurality of timing indicators where the number of timing indicators represents the number of different phases between the video signals.
6 Assignments
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Accused Products
Abstract
A video timing display for multi-rate systems allows a user to quickly, easily and precisely measure the timing difference between video signals of different rates. A graphic display area within a raster display region provides a display of vertical and horizontal timing offsets of one video signal with respect to another video signal as a reference having a different frame rate. The graphic display area includes a reference indicator associated with the reference and timing indicators indicating the timing phases between the video signals, with one of the timing indicators being emphasized. A numeric display area may be provided adjacent the graphic display area to display the actual vertical and horizontal timing differences in appropriate units for the emphasized timing indicator relative to the reference indicator with a precision to one video clock cycle.
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Citations
25 Claims
- 1. A video timing display for measuring timing difference between video signals having different rates comprising a graphic display area on a display screen, the graphic display area including a reference indicator associated with one of the video signals and a plurality of timing indicators where the number of timing indicators represents the number of different phases between the video signals.
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9. An apparatus for measuring timing between video signals having different rates comprising:
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means for extracting a pulse from each video signal corresponding to a common reference point in each video signal; means for determining an interval between the two pulses; means for determining a video format for each of the video signals; means for deducing, from the video formats and the interval, phase values between the video signals; means for parsing the phase values to generate a horizontal timing offset and a vertical timing offset for each phase value; and means for displaying the horizontal and vertical timing offsets for each phase value as a timing display. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of displaying timing between video signals in a multi-rate system comprising the steps of:
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determining a plurality of phases between a pair of video signals having different rates; and providing a graphic representation on a display of the phases in the form of timing phase indicators relative to a reference indicator associated with one of the pair of video signals. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification