Patent ID: 9154794
Filing Date: 2015-10-06
Classification: H04N

Abstract:
1. A picture decoding apparatus comprising: a picture decoding unit operable to decode a coded picture signal; a ratio decoding unit operable to decode the ratio of the number of luminance pixels to the number of chrominance pixels for the decoded picture signal; a selecting unit operable to select one decoding method out of at least two decoding methods, the one decoding method being selected based on the ratio; and a data decoding unit operable to decode data related to the picture size in accordance with the selected decoding method, wherein the data related to the picture size indicates a size of a picture corresponding to the decoded picture signal, wherein, when the ratio of the number of horizontal luminance pixels to the number of horizontal chrominance pixels is M:1, said selecting unit of said picture decoding apparatus selects a decoding method in which a parameter value of a horizontal size included in the decoded data related to the picture size is multiplied by M, the horizontal luminance pixels and the horizontal chrominance pixels being included in the decoded picture signal, and wherein the data related to the picture size indicates an output area in a whole pixel area decoded by said picture decoding unit, the output area being a pixel area to be outputted in decoding.