FIELD: computing.
SUBSTANCE: image decoding apparatus comprising an extractor unit configured to extract quantization parameters; and a decoding unit configured to decode the encoded data using the quantization parameters, the extraction unit configured to: extract the first quantization parameter of the first line in a part including a plurality of blocks using a quantization parameter provided for said part; extracting the first quantization parameter of the second row in said part using the quantization parameter provided for said part; and extracting the n-th (n is an integer equal to or greater than 2) quantization parameter of the second row using the (n-1)th quantization parameter of the second row.
EFFECT: said invention is aimed at providing possibility of parallel decoding in the quality of the entire processing.
11 cl, 28 dwg
