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Bluespec H.264 Decoder: Overview Details Name: bluespec-h264 Created: 25-Jun-2008 07:26:19 Updated: 07-Jul-2008 00:10:43 CVS: browse Other project properties Category :: Video controller Language :: Other Phaze :: FPGA proven Development status :: Beta Project maintainers Kermin Fleming Jamey Hicks Statistics view H.264 Decoder supporting 1080p at 60 fps Code Summary ------------ This module implements the baseline profile of the H.264 video codec standard. It supports video resolution up to 1080p. It is capable of decoding video at 60 frames per second (typically more) at any supported resolution. The design has been synthesized in 180nm technology. At 100 mHz it requires approximately 4 square millimeters. Lower resolution decoding (720p @ 30 fps) requires approxiamately half the implementation area. It should be noted that there are some error resiliency features that are not implemented: * Flexible macroblock ordering * Arbitrary Slice Ordering * Redundant Slices These are intended to be used when streaming video over unreliable channels, but they don't seem to be commonly supported. Directory layout ---------------- release - This directory contains the released H.264 source. test - This directory contains the build and test infrastructure. Building the source requires that the Bluespec compiler (bsc) in your executable path. The code has been tested on the lastest 2007 release. Future releases may or may not build a functional version of the code. To build the code type in the test directory: make release Testing infrastructure is included in the release. The golden software code requires g++ 4.1. It will not compile with g++ 4.0 or earlier. Further, the included software model does not correctly decode 1080p resolution and possibly other smaller resolutions. Ignore reported decoding errors at this resolution. Alternatively, you could manually check against the orignal source image. If you want to run the included test cases, type the following command: ./test.pl This command will build the hardware and attempt to decode a number of sample encoded videos of various resolutions, reporting results as it decodes. The testbench takes several hours to run to completion. Documentation ------------- Refer to the source (kind of spotty) and the following URL: csg.csail.mit.edu/pubs/memos/Memo-497/memo497.pdf This document contains many useful diagrams and a good description of the behavior of the system. Status VGA@30fps decoding on FPGA 1080p@60fps on FPGA coming soon