Image encoding device and method, and image decoding device and method

Image encoding device and method, and image decoding device and method

  • CN 105,959,706 B
  • Filed: 01/06/2012
  • Issued: 01/08/2021
  • Est. Priority Date: 01/12/2011
  • Status: Active Grant
First Claim
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1. An image encoding device is characterized by comprising:

  • an intra prediction unit that generates a predicted image by performing intra prediction processing on an encoding block obtained by dividing an input image, when an encoding mode corresponding to the encoding block is an intra encoding mode,in the intra prediction unit, when performing average value prediction, when performing filtering processing on the prediction target pixels located at the upper end and the left end in the partition of the coding block using an intermediate prediction value defined as an average value of a plurality of adjacent pixels of the partition of the coding block and adjacent pixels of the prediction target pixels,when the pixel to be predicted is the upper left pixel in the partition of the coding block, the filter coefficient of the intermediate prediction value is set to 1/2, the filter coefficients of the pixels adjacent to the upper side and the left side of the pixel to be predicted are set to 1/4,when the pixel to be predicted is a pixel located at the upper end in the partition other than the upper left pixel, the filter coefficient for the intermediate predicted value is set to 3/4, the filter coefficient for a pixel adjacent to the upper side of the pixel to be predicted is set to 1/4,when the pixel to be predicted is a pixel located at the left end in the partition other than the upper left pixel, the filter coefficient for the intermediate prediction value is set to 3/4, the filter coefficient for a pixel adjacent to the left of the pixel to be predicted is set to 1/4,the image encoding device performs filtering processing according to the following expression (1),

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