Apparatus and method for generating on-screen-display messages using stored bitstreams
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United States of America Patent
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Jun 27, 2000
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N/A
app pub date -
Nov 24, 1997
filing date -
May 24, 1995
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Abstract
An apparatus and concomitant method for constructing a valid OSD message bitstream from a plurality of stored character bitstreams. Each character of the OSD font set is initially scaled into a fixed block size, e.g., a block size of 16.times.16 pixels. Each character is then encoded into a 'character bitstream' using the intra macroblock coding syntax. The character bitstream is stored within a storage medium. When a frame of OSD messages needs to be encoded, the character bitstreams are read from the storage medium and cascaded to form a valid OSD message bitstream which represents the frame of OSD messages.
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