Patent ID: 9497483
Filing Date: 2016-11-15
CPC Classification: H04N

Claim Text:
1. A picture coding apparatus which generates a coded picture signal by coding each picture in each random access unit which includes one or more pictures, said picture coding apparatus comprising: a coder operable to code, when the random access unit of the coded picture signal is an open type random access unit which is able to be coded by referring to another random access unit, a picture to be coded to generate an independent picture which is positioned, in the random access unit, in a display order before a starting picture that is positioned in a decoding order as a first picture, and which is able to be decoded independently without referring to any other picture; an information generator operable to generate, when the random access unit is the open type random access unit, first supplementary information which indicates a picture type of each of pictures in the random access unit of the coded picture signal, and second supplementary information which indicates a structure of each of the pictures; a generator operable to generate, when the random access unit is the open type random access unit, a stuffing bit so that a total bit number of the first supplementary information, the second supplementary information, and the stuffing bit is integral multiplication of eight bits; and a writer operable to write, when the random access unit is the open type random access unit, the first supplementary information and the second supplementary information generated by said information generator and the stuffing bit generated by the generator into the random access unit of the coded picture signal, wherein the first supplementary information is supplementary information indicating a picture type of each of the pictures, in the decoding order of the pictures in one of the random access units, and a picture type of at least one of the pictures is the independent picture, and the second supplementary information is supplementary information for identifying the number of display fields when each of the pictures is displayed, in the decoding order of the pictures in one of the random access units, and the number of display fields varies among pictures in at least one random access unit for which the second supplementary information is written.