JPEG-LS-E

Lossless & Near-Lossless JPEG-LS Encoder

Despite its lower computational complexity JPEG-LS offers exceptionally high lossless compression efficiency. JPEG-LS is expected to outperform PNG, and to provide similar compression ratios as lossless JPEG 2000 for both color and greyscale images.   

The following shows the lossless compression advantage of JPEG-LS over other, more complex algorithms using several indicative example images. 

The JPEG-LS-E is suitable for systems requiring numerically or visually lossless compression of images or video of potentially high color or greyscale accuracy. Application areas include medical Imaging (DICOM), aerospace imaging or surveillance, and advanced driver assistance systems.

The core is available in two versions: size-optimized JPEG-LS-ES and scalable throughput JPEG-LS-EF.

The JPEG-LS-ES version uses just 40K gates, provides a throughput of one sample per cycle, and requires only one image line of buffering. A single JPEG-LS-ES core can compress several hundreds of Msamples per second when mapped on an ASIC technology.

The scalable-throughput JPEG-LS-EF version can process multiple samples per cycle by internally aggregating a user-defined number of JPEG-LS-ES cores. It is suitable for compressing images or video with ultra-high resolutions and/or frame rates. 

Support 

The core as delivered is warranted against defects for ninety days from purchase. Thirty days of phone and email technical support are included, starting with the first interaction. Additional maintenance and support options are available. 

Deliverables 

The core is available in source code RTL (Verilog) or as an FPGA netlist, and its deliverables include everything required for successful implementation:

• Sophisticated self-checking Testbench    
• Software (C++) Bit-Accurate Model  
• Sample simulation and synthesis scripts 
• Comprehensive user documentation Applications 

The JPEG-LS-E can be mapped to any ASIC technology or FPGA device (provided sufficient silicon resources are available).  The JPEG-LS-ES version requires about 40k gates and can run up to 500MHz in a typical 28nm technology. The size of a JPEG-LS-EF version depends on its configuration. Please contact CAST to get characterization data for your target configuration and technology.

The JPEG-LS-E can be mapped to any Altera® FPGA device, provided sufficient silicon resources are available. The following table provides sample performance and resource utilization data for different Altera® FPGA device families for the JPEGLS-E-S version of the core.  

Notes
1: Exact resource utilization and max performance depend on target device and core configuration
2: List of video formats is not exhaustive. Indicated video formats may not be supported at devices of all speed grades

The JPEG-LS-E can be mapped to any AMD device, provided sufficient silicon resources are available. The following table provides sample performance and resource utilization data for different Xilinx device families for the JPEGLS-ES version of the core.  

Note
1: Exact resource utilization and max performance depend on target device and core configuration
2: List of video formats is not exhaustive. Indicated video formats may not be supported at devices of all speed grades

The JPEG-LS-E can be mapped to any Lattice device, provided sufficient silicon resources are available. The following tables provide sample performance and resource utilization data for a limited set of configurations of the core. The sample results do not represent the higher speed or smaller area for the core.

Table 1: Sample results for the core configured to support a max image width of 2048 pixels,  and 1 color component.

The JPEG-LS-E can be mapped to any Microchip device, provided sufficient silicon resources are available. The following tables provide sample performance and resource utilization data for different Microsemi device families for the JPEG-LS-ES and the JPEG-LS-EF versions of the core. The sample results do not represent the higher speed or smaller area for the core.

Table 1: Sample results for the JPEG-LS-ES version of the core configured to support a max image width of 2048 pixels, 8 bits per sample, and 1 color component.

Table 2: Sample results for the JPEG-LS-EF version of the core configured to support a max image width of 2048 pixels, 8 bits per sample, 1 color component, and 2 samples/cycle throughput.