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System and method for motion prediction in scalable video coding

A technology of video coding and motion vector prediction, which is applied in the field of video coding and can solve problems such as the impracticality of obtaining motion vectors

Inactive Publication Date: 2007-08-22
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, obtaining motion vectors for each pixel is usually not practical as this would require the transmission of motion vectors for each pixel

Method used

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  • System and method for motion prediction in scalable video coding
  • System and method for motion prediction in scalable video coding
  • System and method for motion prediction in scalable video coding

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Embodiment Construction

[0031] In the following description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof and are shown by way of specific illustrated embodiments in which the invention may be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the preferred embodiments of the present invention.

[0032] In scalable video coding, the current layer can be an enhancement in spatial resolution, temporal resolution, and picture quality. In the following discussion, the term "base layer" may be the absolute base layer produced by a non-scalable codec such as defined in the H.264 standard, or the enhancement used as the basis for encoding the current enhancement layer. layer. Furthermore, in the following discussion, when using motion vectors from the spatial base layer, it is assumed that motion vector upsampling has been performed.

[0033] Embodiments of t...

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Abstract

A device, system and method for motion vector prediction in scalable video coding. Embodiments of the present invention may determine a predictive motion vector in scalable video coding by obtaining current layer motion vectors; determining a final base layer motion vector; and calculating a predictive motion vector based on the current layer motion vectors and the final base layer motion vector. A similarity or consistency of neighboring motion vectors at a current layer and a reliability of motion vector prediction using neighboring motion vectors at a base layer may be used to determine the predictive motion vector.

Description

technical field [0001] Embodiments of the present invention relate to the field of video coding, and more particularly, to systems and methods for motion prediction in scalable video coding. Background technique [0002] Digital video is often compressed for storage and broadcasting. Compressed video can be stored in less space and transmitted with lower bandwidth than raw, uncompressed video content, thereby reducing storage and transmission requirements. [0003] Digital video consists of sequential images played at a constant rate (eg, 30 images / second). A common way to compress digital video is to exploit the redundancy between these sequential images, for example in time or space. Since there can be much in common between successive images in a video sequence, it is beneficial to only transmit the differences between successive images. is called the prediction error frame E n The difference frame can be determined by the current frame I n and a reference frame P of...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/187H04N19/30H04N19/56
Inventor M・卡尔克泽威茨王祥林鲍亦亮J・里奇
Owner NOKIA CORP
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