Image decoding device, image decoding method, integrated circuit, and program for performing parallel decoding of coded image data

  • US 8,737,476 B2
  • Filed: 10/20/2009
  • Issued: 05/27/2014
  • Est. Priority Date: 11/10/2008
  • Status: Active Grant
First Claim
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1. An image decoding device that decodes coded image data on a block-by-block basis, the coded image data being resulted from coding, on a block-by-block basis, of image data partitioned into blocks each of which has a predetermined number of pixels, said image decoding device comprising:

  • a storage unit configured to store data of at least one reference image to be referred to for decoding the coded image data;

    a pre-decoding unit configured to decode, on a block-by-block basis, reference information indicating a number of reference images to be referred to on a block-by-block basis for decoding the coded image data;

    an amount-of-transferred-data prediction unit configured to calculate, on a block-by-block basis using the reference information, a predictive data amount of a reference image to be read out on a block-by-block basis from said storage unit for decoding the coded image data;

    a block determination unit configured to determine, using the predictive data amount calculated, multiple blocks in the coded image data which are to be decoded in parallel, in such a manner as to reduce variation in amounts of data read out from said storage unit; and

    block decoding units configured to decode in parallel the determined multiple blocks in the coded image data.

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