Patent · US Active

Image coding method and image decoding method for coding and decoding image data on a block-by-block basis

US8971652B2 · kind B2 · utility

18Cited by

5References

33Claims

0Family size

Assignee

Panasonic Intellectual Property Corporation of America · US

Inventors

Virginie Drugeon · Darmstadt, DE
Thomas Wedi · Groß-Umstadt, DE
Torsten Palfner · Langen, DE
Hisao Sasai · Osaka, JP

Key dates

Filing date	Apr 15, 2013
Grant date	Mar 3, 2015
Priority date	—
Expiry date	May 3, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/593
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An image coding method performs intra prediction with a higher coding efficiency by coding image data on a block-by-block basis. The method generates a predicted block by predicting a current block; computes a difference between the current block and the predicted block; codes the difference computed in the computing; decodes the difference coded in the coding; and adds the difference decoded in the decoding to the predicted block to generate a decoded block. The generating of the predicted block includes detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.