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Motion vector scaling for non-uniform motion vector rasters

A motion vector, uniform motion technology, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as not optimal

Active Publication Date: 2017-09-01
GOOGLE TECHNOLOGY HOLDINGS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with uniform distribution of subsampling positions is that it may not be optimal for a given set of filter constraints, such as the number of taps or the power spectral density of the reference block

Method used

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  • Motion vector scaling for non-uniform motion vector rasters
  • Motion vector scaling for non-uniform motion vector rasters
  • Motion vector scaling for non-uniform motion vector rasters

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Embodiment Construction

[0040] Techniques for a video compression system are described herein. In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of certain embodiments. Particular embodiments as defined by the claims may include some or all of the features of these examples alone or in combination with other features described below, and may further include modifications and equivalents of the features and concepts described herein.

[0041] Figure 5 A simplified system 500 for scaling motion vectors on a grid of non-uniform motion vectors is shown, according to one embodiment. System 500 includes an encoder 502 and a decoder 504 for encoding and decoding video content. The encoder 502 and decoder 504 perform temporal prediction through motion estimation and motion compensation. Motion estimation is the process of determining a motion vector (MV) for a current block (eg, unit) of video. Mot...

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Abstract

In one embodiment, a method determines a scaled motion vector for a first block. Motion vectors for the second block are determined, wherein the motion vectors are on a non-uniform motion vector grid. The method then maps the motion vectors for the second block to a higher accuracy uniform motion vector grid and scales the motion vectors for the second block on the higher accuracy motion vector grid, where the higher Accuracy A uniform motion vector grid has higher accuracy than a non-uniform motion vector grid. Scaled motion vectors on the non-uniform motion vector grid are associated with the first block for the temporal prediction process.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 556,147, filed November 4, 2011, entitled "Motion Vector Scaling for Non-Uniform Motion Vector Grid," the entire contents of which are hereby incorporated by reference. Background technique [0003] High Efficiency Video Coding (HEVC) is a block-based hybrid spatial and temporal predictive coding scheme. Similar to other video coding standards, such as Moving Picture Experts Group (MPEG)-1, MPEG-2, and MPEG-4, HEVC supports intra-pictures such as I-pictures and inter-pictures such as B-pictures. In HEVC, P and B pictures are merged into a general B picture that can be used as a reference picture. [0004] Intra pictures are coded without reference to any other pictures. Thus, only spatial prediction is allowed for coding units (CUs) / prediction units (PUs) within intra pictures. However, inter pictures support intra and inter prediction. A CU / PU in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/51H04N19/523H04N19/593
CPCH04N19/59H04N19/503H04N19/513H04N19/52H04N19/523H04N19/527H04N19/82
Inventor 娄健库亚·米鲁王利民
Owner GOOGLE TECHNOLOGY HOLDINGS LLC