2D Discrete Cosine Inverter, 2D Inverse Discrete Cosine Inverter and Digital Signal Processing Equipment

摘要

An object of the present invention is to provide a two-dimensional discrete cosine converter that can reduce the number of registers and reduce the circuit size even when serial data is used as input / output data.;In the configuration, for example, image data is serially input at the input terminal, and is transferred to the registers R0 to R11 at the subsequent stage via the selectors S1 to S12. In this transfer process, data is supplied to predetermined arithmetic units AS1, AS2, ADD, SUB, and MPY via the bus 4 by control signals CS1 to CS24 from the control circuit 9 to perform calculations. do. The calculation result in the calculator is output to the registers R1 to R12 again through the selectors S1 to S12, and finally the calculation result is serially output from the output terminal.