Abstract: In an embodiment, there is provided a video processing component comprising a compensation engine configured to generate pixels of a first video frame from a second video frame based at least in part on specified pixel motion; and an access buffer configured to store pixel data corresponding to pixels of the second video frame for reference by the compensation engine, wherein the pixel data is stored by the access buffer at different vertical resolutions depending on vertical distances of the pixels corresponding to the pixel data from a target pixel that is indicated by the compensation engine.
Abstract: A method for deriving a synchronisation signal (35) from a video signal comprises tracking the blanking level (107) of the video signal with first and second slice level signals (26, 27) and tracking the sync tip level (110) of the horizontal sync signal (109) of the video signal with third and fourth slice level signals (28,29) for determining the blanking level (107) and the sync tip level (110). A value for an intermediate slice level signal (30) is computed from the first, second, third and fourth slice level signals (26, 27, 28, 29) so that the value of the intermediate slice level signal (30) lies approximately halfway between the blanking level (107) and the sync tip level (110).
Abstract: The invention teaches a method, means and apparatus for clamping a back porch interval of a video signal including clamping a sync-tip level of said video signal to a variable reference voltage, comparing a back-porch voltage level of the sync-tip clamped video signal to a predetermined reference voltage, generating an error signal representative of the difference between the back-porch voltage level and the predetermined reference voltage, and adjusting the variable reference voltage in response to the error signal such that the error signal is minimized.
Abstract: The object of the present invention is to provide a color noise slice circuit in which the color noise slice process does not cause changes in hue. The color noise slice circuit of the present invention is provided with a divider that receives color-difference signals (R-Y) and (B-Y) and calculates (R-Y)/(B-Y), a memory that stores values for .theta.=tan.sup.-1 ?(R-Y)/(B-Y)!, memories for storing sin .theta. and cos .theta., a noise slice width setting circuit that sets the slice width .DELTA.S, multipliers that calculate .DELTA.Sr=.DELTA.S* sin .theta. and .DELTA.Sb=.DELTA.S * cos .theta., and slice circuits that execute color noise slice processing of color-difference signals (R-Y) and (B-Y) using .DELTA.Sr and .DELTA.Sb, respectively, as color noise slice widths.
Abstract: A high-speed video switch uses a current-mode switch to switch between a first input video signal and a second input video signal. Each of the first and second input video signals are input to the video switch through clamping circuits which clamp a blank level of the input video signals to a predetermined constant level. Preferably, the blank level of the first and second input video signals are clamped to two volts. An output signal is output by the video switch which represents one of the input video signals. The video switch receives two control signals from the video system. The two control signals control which one of the input video signals is represented by the output signal. A back-to-back diode configured isolation circuit is used to isolate the one of the two input video signals which is not represented by the output signal.
January 11, 1996
Date of Patent:
November 11, 1997
Sony Corporation, Sony Electronics, Inc.
Abstract: A circuit arrangement for processing an input video signal (V) is described, which video signal has a fixed black level (SP), a given white peak value (WW) as well as a black peak value (SW) dependent on the picture contents (during tb), in which a correct display of the blackest and brightest parts of the picture contents of the video signal (V) is rendered possible without many components and without interference.
November 23, 1993
Date of Patent:
April 11, 1995
U.S. Philips Corporation
Hartmut Harlos, Klaus Kroner, Matthias Peters, Jorg Wolber