Encoder apparatus, encoding method, decoder apparatus, decoding method, program, program recording medium, data recording medium, data structure, and playback apparatus

摘要

An encoding apparatus that encodes a picture is disclosed. The apparatus comprises a encoding means for encoding the picture; picture determining means for determining whether the picture is an interlace-scanned picture or a progressive-scanned picture; flag set means for setting the determined result of the picture determining means to a scanning flag that represents a scanning system of a picture; information set means for setting information that represents a display system of a picture to display system designation information that designates a display system of a picture, and multiplexing means for multiplexing the encoded result of the picture with the scanning flag and the display system designation information and outputting the multiplexed result. The scanning flag is ct_type defined in the H.264/AVC standard and the display system designation information is pic_struct defined in the H.264/AVC standard. A decoding apparatus that decodes encoded data of a picture is also disclosed. The apparatus comprises: decoding means for decoding the encoded data having been multiplexed with an encoded result of the picture, a scanning flag that represents a scanning system of the picture and display system designation information that designates a display system of the picture; recognition means for recognizing the picture as an interlace-scanned picture or a progressive scanned picture on the basis of the scanning flag and the display system designation information of the picture;frame picture output means for interpolating the picture with fields, generating a frame picture, and outputting it when the recognized result of the recognition means is an interlace-scanned picture and for outputting the picture as a frame picture when the recognized result of the recognition means is a progressive-scanned picture; and repetitive output means for repetitively outputting the frame picture that is output from the frame picture output means only the number of times corresponding to the display system designation information.