High speed JPEG2000 encoder by configurable processor

This paper discusses a design of high speed JPEG2000 encoder. JPEG2000 entropy coding is realized by hardware module since its computational cost accounts for roughly 65% of total according to software profiling. Discrete wavelet transformation (DWT) is accelerated by attaching user-defined instructions to Tensilica's configurable processor Xtensa. Utilizing the 8,700 gate entropy coder with 27 Kbit of memory and the custom instructions implemented by 8,000 gates, the number of cycles needed to encode an image is reduced to 31%.