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Simplified inter-layer motion prediction for scalable video coding

A technology of inter-layer prediction and video coding, which is used in digital video signal modification, television, and pulse-modulated television signal transmission.

Inactive Publication Date: 2009-05-20
INTERDIGITAL VC HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art methods for deriving encoding information can be used for high-resolution images whose format cannot be related to the format of low-resolution images through binary transformation (dyadic transform)

Method used

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  • Simplified inter-layer motion prediction for scalable video coding
  • Simplified inter-layer motion prediction for scalable video coding
  • Simplified inter-layer motion prediction for scalable video coding

Examples

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Embodiment Construction

[0012] In the following, two spatial layers are considered, a lower layer (called base layer) corresponding to low-resolution images, and a higher layer (called enhancement layer) corresponding to high-resolution images. Such as figure 1 As shown, the width and height of the enhancement layer image (ie, the high-resolution image) are defined by We and He, respectively. The size of the base layer image (ie the low resolution image) is defined by Wb and Hb. The low-resolution image can be located at coordinates in the enhancement layer image coordinate system (X orig , Y orig ) position, the downsampled version of the sub-image of the enhancement layer image of size Ws and Hs. Low resolution and high resolution images can be provided by different cameras. In this case, the low-resolution image is not obtained by down-sampling the high-resolution image, and the geometric parameters can be provided by external means, eg by the camera itself. The window corresponding to the sc...

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Abstract

The invention relates to a method for determining for a high layer macroblock that uses inter-layer prediction a partitioning of the macroblock in partitions. It comprises the following steps: - dividing the high layer macroblock in non-overlapping high layer blocks of a predefined size; - determining a corresponding base layer pixel for one pixel, called reference pixel, of each high layer block; - identifying, for each reference pixel, a base layer macroblock to which the corresponding base layer pixel belongs, a base layer partition to which the corresponding base layer pixel belongs in the identified base layer macroblock, a base layer sub-partition to which the corresponding base layer pixel belongs in the identified base layer partition if the sub-partition exists; - deriving, for each of the high layer block, a single value, called PartInfo value; and - determining a partitioning of the high layer macroblock in macroblock partitions by comparing between them the PartInfo values associated with each of the high layer blocks.

Description

technical field [0001] The present invention relates to scalable video coding (SVC), in particular to inter-layer motion prediction for the SVC standard developed by the ISO / IEC MPEG and ITU-T VCEG Joint Video Team (JVT). Background technique [0002] The scalable and scalable coding method in the prior art supports coding information in a hierarchical manner, so that the scalable and scalable coding method can be decoded at different resolutions and / or quality levels. Therefore, the data stream generated by the scalable coding device is divided into several layers, namely a base layer and one or more enhancement layers. These devices make it possible to adapt a unique data stream to variable transmission conditions (bandwidth, error rate...) and capabilities of the receiving device (CPU, characteristics of the rendering device...). A spatially scalable hierarchical encoding (or decoding) method encodes (or decodes) a first portion of data associated with a low-resolution i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N7/26351H04N19/00781H04N7/50H04N19/00884H04N7/26946H04N19/70H04N19/61H04N19/33H04N19/53H04N19/176
Inventor 爱德华·弗朗索瓦文森特·博特罗热罗姆·维耶龙克里斯托夫·舍旺斯
Owner INTERDIGITAL VC HLDG INC
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