Moving picture decoding apparatus and picture boundary deciding method
AssigneeFujitsu Toshiba Mobile Communications Limited
InventorsHirofumi Mori, Tatsunori Saito
Life of this patent
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Abstract
A moving picture decoding apparatus which receives stream data in time series and decodes a moving picture included in the stream data, includes a deciding unit which decides a slice picture boundary of a picture of the moving picture, and a decoding unit which decodes the picture based on a result of the decision of the deciding unit, wherein the deciding unit decides that a slice picture and a just before slice picture are different from each other when an increment of frame_num of the slice picture is 1.
Claims15
A moving picture decoding apparatus for receiving stream data which includes slice pictures and for decoding the slice pictures to reproduce a moving picture, wherein the slice pictures include, as attribute information, a delimiter indicating a picture boundary, and frame number control information indicating whether an increment in frame_num is limited to 0 or 1, the apparatus comprising:
- a first decision unit which decides whether the delimiter exists, and which decides that a position of the delimiter is the picture boundary when it is decided that the delimiter exists;
- a second decision unit which decides whether an increment in frame_num is 1 or more than 1, when the first decision unit decides that no delimiter exists, and which decides that a boundary between a current slice picture and a preceding slice picture is the picture boundary, when deciding that the increment in frame_num is 1;
- and
- a controller which discards the current slice picture when the first decision unit decides that no delimiter exists, and the second decision unit decides that the increment in frame_num is more than 1.
A moving picture decoding method for a moving picture decoding apparatus which receives stream data including slice pictures and which decodes the slice pictures to reproduce a moving picture, wherein the slice pictures include, as attribute information, a delimiter indicating a picture boundary, and frame_number control information indicating whether an increment in frame_num is limited to 0 or 1, the method comprising:
- deciding whether the delimiter exists, and deciding that a position of the delimiter is the picture boundary when it is decided that the delimiter exists;
- deciding whether an increment in frame_num is 1 or more than 1, when it is decided that no delimiter exists, and deciding that a boundary between a current slice picture and a preceding slice picture is the picture boundary, when deciding that the increment in frame_num is 1;
- and
- discarding the current slice picture when it is decided that no delimiter exists, and that the increment in frame_num is more than 1.
A moving picture decoding apparatus for receiving stream data which includes slice pictures and for decoding the slice pictures to reproduce a moving picture, wherein the slice pictures include, as attribute information, a delimiter indicating a picture boundary, and frame_number control information indicating whether an increment in frame_num is limited to 0 or 1, the apparatus comprising:
- first decision means for deciding whether the delimiter exists, and for deciding that a position of the delimiter is the picture boundary when it is decided that the delimiter exists;
- second decision means for deciding whether an increment in frame_num is 1 or more than 1, when the first decision means decides that no delimiter exists, and for deciding that a boundary between a current slice picture and a preceding slice picture is the picture boundary, when deciding that the increment in frame_num is 1;
- and
- control means for discarding the current slice picture when the first decision means decides that no delimiter exists, and the second decision means decides that the increment in frame_num is more than 1.
Dependencies are inferred from the claim text.