Image encoding apparatus, image encoding method, image encoding program, image decoding apparatus, image decoding method, and image decoding program

Patent metadata

Field	Value
Publication number	US-9225992-B2
Application number	US-201213630937-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Mar 31, 2010
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

Abstract

An intra-prediction unit generates an intra-prediction signal of an image. A subtraction unit calculates a first residual signal from a difference between an original signal of the image and the intra-prediction signal. A residual approximation signal creation unit creates a residual approximation signal by linearly approximating the first residual signal based on a DC component of the first residual signal. A subtraction unit calculates a second residual signal from a difference between the first residual signal and the residual approximation signal. An orthogonal transformation coefficient integration unit generates a third residual signal by synthesizing the DC component of the first residual signal and the second residual signal. A variable-length encoding unit performs variable-length encoding of the third residual signal.

First claim

What is claimed is:

1. An image encoding apparatus, comprising:
an intra-prediction unit configured to generate an intra-prediction signal of an image;
a first subtraction unit configured to calculate a first residual signal from a difference between an original signal of the image and the intra-prediction signal;
a residual approximation signal creation unit configured to create a residual approximation signal by linearly approximating the first residual signal based on a DC…

Assignees

• Jvc Kenwood Corp

Inventors

• Kumakura Toru

Classifications

• H04N19/176

  Electricity · mapped topic

• H04N19/11

  Electricity · mapped topic

• H04N19/105

  Electricity · mapped topic

• H04N19/61

  Electricity · mapped topic

• H04N19/593

  Electricity · mapped topic