A High-Throughput JPEG XR Encoder

JPEG XR is a new standard for still image compression. Compared to previous standards, it provides better compression at the expense of higher computation complexity. Because of data dependency between operations in the photo core transform (PCT) and the photo overlap transform (POT), the performance of the system is limited. This article presents new POT and PCT algorithms that can be executed independently and in parallel hence. Accordingly, a pipelined JPEG XR architecture is designed to speed up the operations. The implemented prototype achieves approximately one pixel per cycle throughput and is capable of processing 199.4 million pixels at 200 MHz.