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Methods providing encoding/decoding of dependent/independent partitions and related devices

A partition and correlation technology, applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve the problems of reducing compression efficiency and blocking artifacts, and achieve the goal of reducing unnecessary damage, improving compression efficiency, and reducing complexity. Effect

Pending Publication Date: 2021-12-07
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0049] Encoding / decoding using known chunked / segmented partitions can reduce compression efficiency and / or cause blocking artifacts

Method used

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  • Methods providing encoding/decoding of dependent/independent partitions and related devices
  • Methods providing encoding/decoding of dependent/independent partitions and related devices
  • Methods providing encoding/decoding of dependent/independent partitions and related devices

Examples

Experimental program
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Effect test

example 1

[0137] In one example, the picture is partitioned into tiles using tile rows and tile columns, and the tiles are then grouped into tile groups, and a flag per tile group is signaled and decoded such that if the value of the flag has A value (e.g., equal to 0) specifies that the tiles in this tile group are independent, and if the value of the flag has another value (e.g., equal to 1), specifies that the tiles in this tile group are independent. Blocks can be related to each other.

[0138] A decoder may perform all or a subset of the following operations / steps for this embodiment to decode a picture:

[0139]1. Decode a chunked partition structure from one or more syntax elements in the bitstream. Grammars are preferably in parameter sets. The grammar can divide the picture into rows and columns, where a tile is the intersection between a row and a column.

[0140] 2. Determine to group the tiles into at least one tile group such that the set of tiles belongs to the tile gr...

example 2

[0162] In another example of this embodiment, similar to the previous example, a flag is signaled for each tile group, the flag specifying whether the tiles in that tile group are related or independent. In this example, however, there are separate flags for the rectangular tile group and separate flags for the raster tile group, where the flag for the rectangular tile group exists in the parameter set and is used with The identity of the rasterized tile group is signaled in the tile group header. A decoder may perform all or a subset of the following operations for this embodiment to decode a picture:

[0163] 1. Decode a chunked partition structure from one or more syntax elements in the bitstream. Grammars are preferably in parameter sets. The grammar can divide the picture into rows and columns, where a tile is the intersection between a row and a column.

[0164] 2. Decode one or more syntax elements that specify whether the tile group is rectangular or whether the til...

example 3

[0176] In another example of this embodiment, a flag is signaled in the PPS for each partition, where the flag specifies whether a particular partition is dependent or independent of previously decoded neighboring partitions.

[0177] A decoder may perform all or a subset of the following operations for this embodiment to decode a picture:

[0178] 1. Decode a chunked partition structure from one or more syntax elements in the bitstream. Grammars are preferably in parameter sets. The grammar can divide the picture into rows and columns, where a tile is the intersection between a row and a column.

[0179]2. Decode one or more syntax elements specifying the number (N) of tiles present in the picture, followed by a loop performed N times, where one flag is decoded for each loop and the flag specifies the tile are related or independent. This syntax is preferably in a parameter set.

[0180] 3. If the partitions are related, decoding the partitions wherein prediction between ...

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Abstract

Methods to decode a picture from a bitstream are discussed. A partitioning structure of the picture is determined, wherein the partitioning structure defines at least first and second partitions of the picture. At least one dependency syntax element is decoded from the bitstream, and whether the second partition is dependent on or independent of the first partition is determined based on the at least one dependency syntax element. The picture is decoded from the bitstream based on determining whether the second partition of the picture is dependent on or independent of the first partition of the picture. Related methods of encoding and related devices are also discussed.

Description

technical field [0001] The present disclosure generally relates to communication of pictures / videos, and more particularly relates to methods and related devices for providing encoding and / or decoding of pictures and / or videos. Background technique [0002] HEVC and VVC are discussed below. [0003] High Efficiency Video Coding (HEVC) (aka H.265) is a block-based video codec standardized by ITU-T and MPEG that utilizes temporal and spatial prediction. Spatial prediction is achieved using intra (I) prediction from within the current picture. Temporal prediction is achieved using inter (P) or bi-directional inter (B) prediction at the block level using previously decoded reference pictures. The difference between the original pixel data and the predicted pixel data (called the residual) is transformed into the frequency domain, quantized, and then transmitted together with the necessary prediction parameters such as prediction mode and motion vector (also entropy encoded) w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/105H04N19/119H04N19/50H04N19/61H04N19/70H04N19/597
CPCH04N19/105H04N19/119H04N19/70H04N19/597H04N19/157H04N19/174H04N19/117H04N19/124H04N19/13H04N19/159H04N19/513H04N19/82
Inventor R·舍貝里M·彼得森M·达姆哈尼安
Owner TELEFON AB LM ERICSSON (PUBL)