High Performance 2-D IDCT Processor Based on DA

In order to improve 2-D IDCT decoding speed, a high performance Two Dimensional (2-D) Inverse Discrete Cosine Transform (IDCT) processor is proposed. The 2-D IDCT is made using 1-D IDCT, the 1-D IDCT is made using Chen algorithm, the multiply and add operation is made using distribute arithmetic. For higher decoding speed, the inputs are divided into high 6 bits and low 6 bits. The look up tables’ size is decreased by represent the inputs by (-1, 1) either than (0, 1). A novel method need no add operation is used for rounding. The high performance 2-D IDCT processor uses Altera EP2C20F484 FPGA and reaches an operating frequency of 165.37 MHz.