An apparatus and method for updating a color look up table and expanding video data for use in various applications such as a multimedia computer. The color look up table updating scheme permits selective updating of one entry in the table or up to all of the entries in the table. Updating of the...http://www.google.com.tw/patents/US5838389?utm_source=gb-gplus-share專利 US5838389 - Apparatus and method for updating a CLUT during horizontal blanking