Patent ID: 9124862
Filing Date: 2015-09-01
Classification: H04N

Abstract:
1. A coding and decoding system which includes a coding apparatus for coding blocks of picture data while adaptively switching, on a block-by-block basis of the blocks of picture data, between frame coding and field coding, and a decoding apparatus for decoding blocks of picture data while adaptively switching, on a block-by-block basis of the blocks of picture data, between frame decoding and field decoding, said coding apparatus comprises: a command generation unit operable to generate a sequence of commands for respectively assigning frame-indices, used for frame coding, to reference frames of the blocks of picture data; a coding unit operable to code information indicating a maximum number of frame-indices; a first reference frame/field specification unit operable to: a reference index coding unit operable to: said decoding apparatus comprises: a command obtainment unit operable to obtain, from a bit stream including the blocks of picture data, a sequence of commands for respectively assigning frame-indices, used for frame decoding, to reference frames of the blocks of picture data, and operable to obtain, from the bit stream, information indicating a maximum number of frame-indices; and a second reference frame/field specification unit operable to: wherein said second reference frame/field specification unit: