APPARATUS FOR ADAPTIVELY PROCESSING VIDEO SIGNALS.

摘要

An apparatus adaptively executing image compression-coding and expansion-decoding, such as discrete cosine transformation (DCT), inverse discrete cosine transformation (IDCT), inner product operation, image data addition, and image data differential operation of the image data of a block of m x n. The apparatus comprises (a) operational units (1 to 4) which are arranged in parallel and execute addition, subtraction, various logic operations, comparison of sizes, differential operation of absolute values, butterfly addition and subtraction, multiplication, and cumulation, (b) mutual connecting pipe line memories (5 to 7) which are so arranged as to connect the adjacent operational units to each other among those operational units, and (c) data selector (41 to 44) which selectively apply input data to the operational units (1 to 4). Adjacent operational units are connected to each other through mutual connecting pipe line memories, and inner pipe line memories in the operational units are selected, forming predetermined data flow paths for executing video signal processing such as DCT.