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Combined loop filtering for image processing

A filter and pixel group technology, applied in the direction of image communication, digital video signal modification, electrical components, etc., to achieve the effect of reducing the number

Pending Publication Date: 2022-02-11
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is questionable whether the gain in compression efficiency offered by bilateral loop filtering is worth the additional implementation cost

Method used

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  • Combined loop filtering for image processing
  • Combined loop filtering for image processing
  • Combined loop filtering for image processing

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Embodiment Construction

[0035] This application claims priority to U.S. Patent Application No. 62 / 865,533, filed June 24, 2019, the entire contents of which are incorporated herein by reference.

[0036] For purposes of simplicity and illustration, the invention will be described primarily with reference to exemplary embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without being limited by these specific details. In this specification, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the invention. Although at least some embodiments herein may be described as applicable to certain contexts and / or types of wireless networks for illustrative purposes, the embodiments are equally applicable to other contexts and / or types of wireless networks not ex...

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Abstract

In an image processing device (i.e. encoder or decoder), the number of loop filter stages is lowered by combining bilateral loop filtering (or Hadamard loop filtering) with either sample Adaptive Offset Filtering (SAO) or Adaptive Loop Filtering (ALF). This avoids the implementation problems associated with too many loop filter stages and provides approximately the same compression efficiency gain as having separate loop filter stages.

Description

technical field [0001] The present invention relates generally to image and video processing, and in particular to a system and method for combined loop filtering operations on image data. Background technique [0002] Technology, especially the advent of sophisticated wireless mobile communication devices (most of which include one or more cameras), has made digital imaging ubiquitous in everyday life in many parts of the world. Video is on the rise, not only from traditional sources such as broadcast and cable distribution systems, but also computers, tablet devices, smartphones, and even watches. Plus, news and entertainment feeds, as well as social media networks that are redefining human community, are flooded with high-resolution color digital images. The sheer volume of iconography has been a factor driving the development of state-of-the-art networking, digital storage, and camera and display technologies. [0003] Significant advances have taken place in image pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/42H04N19/82
CPCH04N19/42H04N19/82H04N19/117H04N19/119H04N19/1883H04N19/463H04N19/85
Inventor 雅各布·斯特罗姆玻尔·温纳斯滕
Owner TELEFON AB LM ERICSSON (PUBL)
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