Patent Document ID: 9693072
Application ID: 14366498
Patent Status: 1

Claim One:
1. A moving picture compression apparatus, comprising: a tile image sequence generation section configured to generate a tile image sequence configured by dividing a frame sequence including a plurality of frame images sequentially positioned along a time axis, into a plurality of tile images, the frame sequence configuring moving picture data, the dividing of the frame sequence including dividing each frame image into a same number and spatial arrangement, on a respective image plane, of tile images, the tile image sequence being a subset of the tile images, the tile images in the subset being sequentially positioned along the time axis and each having a same spatial position on its respective image plane as the other tile images in the subset; a reference image compression section configured to compress the tile image sequence to generate compression data of a reference image; a difference image generation section configured to generate a difference image sequence configured from difference images which represent a difference between tile images configuring the tile image sequence and images obtained by decoding the compression data of the reference image generated by the reference image compression section and corresponding to the tile images; a difference image compression section configured to compress the difference image sequence in units of data blocks obtained by dividing the difference image sequence on the image plane and a time axis to generate compression data of the difference images; and a compression data generation section configured to generate moving picture compression data including the compression data of the reference image and the compression data of the difference images in tile image units of a predetermined number of frames and output the moving picture compression data to a storage apparatus, wherein at least one of: the reference image compression section generates, for each predetermined number of pixels of data blocks of the reference image obtained by dividing the reference image on the image plane and the time axis, a pallet which holds two values from among pixel values as representative values and an index which holds, in place of the pixel values, information which designates one of a plurality of intermediate values determined by linearly interpolating the representative values and the representative values to quantize the pixel values, and the difference image compression section generates, for each predetermined number of pixels of data blocks of the difference image, a pallet which holds four values obtained by multiplying four values which are representative values from among pixel values of the pixels by 1/N (N is a natural number) and an index which holds, in place of the pixel values, information which designates one of the four values held by the pallet to quantize the pixel values.