DISCRETE COSINE TRANSFORMER DEVICE AND INVERSE DISCRETE COSINE TRANSFORMER DEVICE

摘要

PURPOSE:To simplify the configuration by decreasing the scale of an inner product arithmetic operation circuit and to attain high speed arithmetic operation by decreasing number of times of the arithmetic operation. CONSTITUTION:Data of 8-row 8-column are inputted from an input terminal IN in the order of columns and fed to a 1st 4-degree inner product arithmetic operation circuit 42 via a 1st rearrangement circuit 41. An output of the inner product arithmetic operation circuit 42 is fed to a 2nd octal inner product arithmetic operation circuit 44 via a 64-word 2nd rearrangement circuit 43. An output of the inner product arithmetic operation circuit 44 is fed to a 3rd 4-degree inner product arithmetic operation circuit 45, and an output of the inner product arithmetic operation circuit 45 is fed to an output terminal OUT via the 64-word 3rd rearrangemenent circuit 46.