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| 供应商 | ALMA Technologies |
|---|---|
| 型号 | Up to 16-bit per Component Numerically Lossless Compression |
| 类型 | Soft IP |
| 到期日 | Silicon proven |
| 源网址 | View more |
| 特征 | ISO/IEC 14495-1 JPEG-LS Compliance Complete, standalone JPEG-LS output stream Image size from 8 x 8 up to 64k x 64k Grayscale, 4:4:4, 4:2:2, 4:1:1 and 4:2:0 chroma sampling formats Programmable sample precision from 2-bit up to 16-bit per component Run-length coding Programmable local gradient thresholds and context parameters reset threshold value Fully portable HDL source code Single clock domain and strictly positive edge triggered design using only D-type FFs |
| 详情页 | View more |
| 附件链接 | View more |
The Alma Technologies JPEGLS-E core 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 access to 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.
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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