Video data processing circuit employing plural parallel-to-serial converters and look-up tables

摘要

A video data processing circuit eanbles an image to be displayed at a higher resolution on an image display unit such as a CRT display unit without the need for high speed parallel-to-serial (P/S) conversion and high speed accessing to look-up tables. Video data each composed of k bits are read in parallel from first to ith video RAMs (VRAMs) and supplied to a corresponding one of first to jth P/S converters. Each of the first to jth P/S converters parallelly stores those k bit video data. Each of the P/S converters serially outputs the stored video data one by one at a first time interval. The video data from the first P/S converters are supplied to a first look-up table, and similarly the video data from the second P/S converters to jth converters are supplied respectively to second to jth look-up tables. Each of the first to jth look-up tables convert the supplied video data into color data. The color data outputted respectively from the first to jth look-up tables are supplied to a selector which outputs the supplied color data one by one at a second time interval of one jth of the first time interval.