JPEG-LS Encoder - Up to 16-bit per Component Numerically Lossless Image & Video Compression

The JPEGLS-E core from Alma Technologies is a JPEG-LS encoder that offers a very compact, efficient and high-performance solution for up to 16-bit per component Numerically Lossless image and video compression. JPEG-LS offers the JPEG 2000 lossless compression efficiency advantage in much more compact silicon footprint and without requiring an external memory device.

JPEG-LS was developed to provide a low complexity lossless image compression standard with better compression potentials than Lossless JPEG. The algorithm at the core of JPEG-LS is LOCO-I (Low Complexity-Lossless Compression for Images). It uses a non-linear predictive scheme with rudimentary edge detecting capability, based on the four nearest -causal- neighbours (left, upper left, upper and upper right) and an entropy encoder which uses adaptively selective Golomb-type codes. The low complexity scheme of JPEG-LS is based on the assumption that prediction residuals follow a two-sided geometric distribution and the fact that Golomb-codes are optimal for geometric distributions, thus the modeling and coding units are matching.

The JPEGLS-E core is designed with simple, fully controllable and FIFO-like, streaming input and output interfaces. Being carefully designed, rigorously verified and silicon-proven, the JPEGLS-E is a reliable and easy-to-use and integrate IP.

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