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| Number | Title | Issue Date |
| 6239846 | Digital video effects, apparatus and method A digital video effects apparatus is arranged to generate a digital video effect by interpolating the values of parameters governing the effect, according to a given function, between time points corresponding to selected frames of a video signal and at w... | 05/29/2001 |
| 5822015 | Providing an accurate tally indication of sources in use for output In the processing of digital video signals there is provided in association with each signal an accompanying tally signal which provides an instantaneous identification of one or more signal sources from which the information contained in each pixel of a ... | 10/13/1998 |
| 5663868 | Stackable electronic equipment assembly with improved circuit board cooling arrangement A cabinet for electronic equipment comprises an array of printed circuit boards stacked in horizontal planes. The circuit boards are interconnected by a vertically extending rear mother board, and the cabinet includes a plenum chamber defined by a partiti... | 09/02/1997 |
| 5524091 | Accurate digital divider A digital divider for forming the quotient (Q) of two numbers (A,B) includes means providing values (Q+1, Q-1) of the quotient with possible rounding errors added to or subtracted therefrom. Selector switching means is arranged to select one of the values... | 06/04/1996 |
| 5293233 | Digital video effects with image mapping on to curved surface In a digital video effects system having a store (8) wherein coordinate values are stored in curved order by addressing the store with coordinate values transformed by a function generator (1) and transformer (2) and storing linear values derived from cou... | 03/08/1994 |
| 5227884 | Processing of video image signals A video image processing system includes a decay processor provided in a signal path via which a video key signal is recirculated through a frame store. The decay processor includes a selector switch for determining which of a plurality of signal paths ha... | 07/13/1993 |
| 5220428 | Digital video effects apparatus for image transposition In a digital video effects system a data store (13) is provided for storing the address within a frame store of image information from the corresponding image frame that is to appear within another image frame as transposed on to a curved surface. The add... | 06/15/1993 |
| 5153726 | Recording and editing of moving television pictures A system enabling a digital video signal to be recorded and reproduced utilizing a solid state memory store (1) as the recording medium comprises a plurality of random access memory sub-systems (1A-1D) each incorporating a read/write buffer (2). The buffe... | 10/06/1992 |
| 5067133 | Error-correction of stored television signals Deterioration of the image as a result of failure of individual memory cells is avoided by storing, together with the data relating to each line of the image field, a code value computed as a function of the value of each data bit in the line and the posi... | 11/19/1991 |
| 4918530 | Processing of video image signals A video image processing system for generating so-called "multi-freeze" digital video effects comprises a frame store (14) within which an image signal can be stored for application to a combining circuit (4) together with a background image signal (1) pr... | 04/17/1990 |
| 4879597 | Processing of video image signals In a method of processing a video signal to provide digital video effects, an image signal is provided with an accompanying reference signal or Z-axis signal representative of the instantaneous distance of the scanning point of the video raster from an im... | 11/07/1989 |
