G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 3/14 (2006.01) G06T 1/00 (2006.01) G09G 5/395 (2006.01)
Patent
CA 2108730
Raster display memories are often arranged to output groups of pixels in progressive blocks, each having a plurality of pixels and each pixel having a plurality of fields. The fields in each, pixel may provide color, overlay and cursor information for an individual position on a video screen. The numbers of bits in each pixel and in each field may be variable in different applications. In this system, control information indicates the starting position of each block, the location of each pixel in each block and each field in each pixel and the width of each pixel and each field in number of bits. Using this control information, the system recovers the pixels in each block and the fields in each pixel and processes such information to provide a display of the pixel information on a video screen. The number of bits contained in each field may be expanded to a width (e.g. 8) when the field width is less than eight (8) bits. In this expansion, the expanded field value has an error, compared to the field value before expansion, less than half of the least significant bit in the expanded field. Frequently, the bits in each field before expansion are provided in the positions of greatest binary significance in the expanded field. The unused positions in the expanded field are then filled in the order of progressively decreasing significance by the bits of progressively decreasing significance in the field before expansion, starting from the bit of greatest significance.
Borden Ladner Gervais Llp
Nxp B.v.
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