Patent · US Active

Image coding method and image decoding method based on edge direction

US8442334B2 · kind B2 · utility

21Cited by

3References

35Claims

0Family size

Assignee

PANASONIC HOLDINGS CORPORATION · JP

Inventors

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

Key dates

Filing date	Jan 16, 2009
Grant date	May 14, 2013
Priority date	—
Expiry date	Jul 28, 2031

Classification

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

Abstract

Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes: generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating 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.