GPU parallel huffman decoding
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United States of America Patent
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Feb 27, 2018
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app pub date -
Jun 28, 2017
filing date -
Jun 28, 2017
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Abstract
Systems, apparatuses, and methods for implementing a parallel Huffman decoding scheme are disclosed herein. A system with a plurality of execution units receives a Huffman encoded bitstream. The system partitions the encoded bitstream into a plurality of chunks. Each execution unit is assigned to decode a separate chunk of the encoded bitstream as well as an extra portion of an adjacent chunk. With this approach, the decoding of the bitstream overlaps for a programmable amount of data at each chunk boundary since each execution unit, excluding the first execution unit decoding the first chunk of the bitstream, will likely decode a certain number of symbols incorrectly at the beginning of the chunk since the chunk boundaries will not be aligned with symbol boundaries. The system determines, from the decoded extra portion at each chunk boundary, where incorrectly decoded ends and where correctly decoded data begins for each decoded chunk.
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