Video decoder for tiles

Patent metadata

Field	Value
Publication number	US-9398307-B2
Application number	US-201213355139-A
Country	US
Kind code	B2
Filing date	Jan 20, 2012
Priority date	Jul 11, 2011
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A system for decoding a video bitstream includes receiving a frame of the video that includes at least one slice and at least one tile and where each of the at least one slice and the at least one tile are not all aligned with one another. Each of the at least one tile is characterized that it is decoded independently of the other the at least one tile including intra-prediction information, motion information. The system receives a set of data from a set of largest coding unit of at least two of the tiles and decoding the largest coding units in a selected manner depending upon a flag in the bitstream. The flag indicates that the decoding is to be performed in a raster scan order within a tile or the decoding is to be performed in a raster scan order across at least two tiles.

First claim

I claim:

1. A method for decoding a video bit-stream using at least one processor comprising:
(a) receiving a bit-stream of a frame of video that includes at least one slice and at least one tile, where each of the at least one slice is decoded independently of another one of the at least one slice and includes the at least one tile, wherein the at least one tile is a rectangular region of the frame and includes coding units for the decoding arranged in a raster scan order;
(b) receiving first information indicating whether location information of the at least one tile is transmitted within the at least one slice;
(c) receiving second information suitable for decoding the at least one tile, the second information includes a location of the at least one tile, the location indicating a position of the at least one tile in the video bit-stream and the first information and the second information are provided in a header of the at least one slice;
(d) receiving a flag indication if the at least one tile is being used;
(e) receiving a flag at an end of the at least one tile;
(f) ignoring bits in the bit-stream until reading from pre-defined positions when receiving the flag; and
(g) initializing a decoding process at a beginning of each of the at least one tile.

2. A decoder for decoding video comprising:
an entropy decoding circuit configured to receive a bit-stream of a frame of the video that includes at least one slice and at least one tile, where each of the at least one slice is decoded independently of another one of the at least one slice and includes the at least one tile, wherein the at least one tile is a rectangular region of the frame and includes coding units used for the decoding arranged in a raster scan order;
an additional entropy decoding circuit configured to receive and entropy decode:
(i) first information indicating whether location information of the at least one tile is transmitted within the at least one slice,
(ii) second information suitable for decoding the at least one tile, where the second information includes a location of the at least one tile, the location indicating a position of the at least one tile in the video bit-stream and the first information and the second information being provided in a header of the at least one slice,
(iii) a flag at an end of the at least one tile, and
(iv) a flag indicating if the at least one tile is being used; and

an inverse circuit configured to generate a residual signal using the bit-stream; wherein
the entropy decoding circuit ignores bits in the bit-stream until reading from pre-defined positions when receiving the flag at an end of the at least one tile and initializes a decoding process at a beginning of each of the at least one tile.

Assignees

• Segall Christopher A
• Sharp Kk

Inventors

• Segall Christopher A

Classifications

• H04N19/13

  Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title

• H04N19/436 Primary

  using parallelised computational arrangements · CPC title

• H04N19/174

  the region being a slice, e.g. a line of blocks or a group of blocks · CPC title

• H04N19/70

  characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title