Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method and apparatus for implicit adaptive motion vector predictor selection for video encoding and decoding

A motion vector prediction and motion vector technology, applied in the field of video encoding and decoding, can solve the problems of expensive bit rate application efficiency and high complexity of the encoder

Active Publication Date: 2016-11-02
INTERDIGITAL CE PATENT HLDG
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexity at the encoder is very high since it brings each predictor into the mode decision loop for each encoded block
Another disadvantage is the overhead (e.g. the index of the motion vector predictor in the set) and can make this approach expensive and inefficient especially for low bitrate applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for implicit adaptive motion vector predictor selection for video encoding and decoding
  • Method and apparatus for implicit adaptive motion vector predictor selection for video encoding and decoding
  • Method and apparatus for implicit adaptive motion vector predictor selection for video encoding and decoding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In Embodiment 1, motion vector predictor selection is based on a priori information provided by fidelity values ​​of neighboring candidates. The motion vector predictor for the currently coded block is the motion vector with the highest fidelity in the set.

[0056] go to image 3 , an exemplary method for implicit adaptive motion vector prediction selection in a video encoder is generally indicated by reference numeral 300 . Method 300 includes start block 305 , which passes control to function block 310 . Functional block 310 initializes the size of the neighbors for different partition modes and passes control to functional block 315 . Functional block 315 defines a set of neighboring motion vectors for the currently encoded block and passes control to functional block 320 . Functional block 320 calculates the fidelity of each motion vector in the set based on the residual of the corresponding block and passes control to functional block 325 . Functional block 32...

Embodiment 2

[0059] In embodiment 2, the fidelity values ​​of motion vector candidates are used in weighted median filtering to obtain motion vector predictors. The weights in weighted median filtering indicate how many times to filter values ​​within the support. The filter supports here are neighbors that include all motion vector candidates of the block. If the weight of a motion vector is n, then the motion vector will be repeated n times when filtered by median filtering. In embodiment 2, the weights are linked to the fidelity by a mapping function that maps the fidelity to the number of repetitions of the motion vector. Subsequently, the output of the weighted median filter is used as the motion vector predictor of the current coding block.

[0060] go to Figure 5 , another exemplary method for implicitly adaptive motion vector predictor selection in a video encoder is indicated generally by reference numeral 500 . Method 500 includes start block 505 , which passes control to fu...

Embodiment 3

[0063] In embodiment 3, implicit motion vector predictor selection can be combined with explicit methods. The fidelity of neighboring motion vectors is generated and compared to a predetermined threshold. If all fidelities are below a threshold, rate-distortion based optimization uses an explicit signaling method for selecting motion vector predictors. Otherwise, the implicit signaling method is used.

[0064] go to Figure 7 , yet another exemplary method for implicitly adaptive motion vector predictor selection in a video encoder is indicated generally by reference numeral 700 . Method 700 includes start block 705 which passes control to function block 710 . Functional block 710 initializes the size of the neighbors for different partition modes and passes control to functional block 715 . Functional block 715 defines a set of neighboring motion vectors for the currently encoded block and passes control to functional block 720 . Function block 720 computes the fidelity ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Methods and apparatus for implicit adaptive motion vector predictor selection for video encoding and decoding are provided. The method encodes image blocks using implicit adaptive motion vector predictor selection. A motion vector for encoding the block is predicted by: defining (315) a set of motion vector predictor candidates for the block based on a plurality of spatiotemporal neighboring motion vectors; and selecting a particular motion vector predictor from the set Candidates are used as motion vectors for encoding the block (325). The selection is made in response to respective values ​​of fidelity of spatiotemporal neighboring motion vectors (320).

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 314,506, filed March 16, 2010, which is hereby incorporated by reference in its entirety. technical field [0003] The present principles relate generally to video encoding and decoding, and more particularly to methods and apparatus for implicitly adaptive motion vector predictor selection for video encoding and decoding. Background technique [0004] Motion estimation and compensation are widely used in video compression to balance and exploit the inherent temporal redundancy between images of a video sequence. Motion information is typically represented by a displacement format with motion vectors and corresponding reference frame indices to indicate the correspondence of the current coded block in the reference frame buffer. This motion information is sent as overhead or otherwise conveyed to the decoder. Clearly, the purpose of comp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/513H04N19/61
CPCH04N19/56H04N19/52H04N19/70H04N19/46H04N19/513H04N19/61H04N19/567H04N19/521H04N19/109H04N19/105H04N19/11H04N19/13H04N19/139H04N19/176H04N19/57
Inventor 郑云飞尹鹏约珥·索吕小安许茜
Owner INTERDIGITAL CE PATENT HLDG
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com