US 2019/0174132 A1 · ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD

Abstract

An encoder which encodes image information includes memory and circuitry accessible to the memory. The circuitry accessible to the memory: encodes position information indicating the position of a specific basic block which is a basic block including a non-zero coefficient first in a predetermined scan order defined in a descending order of frequencies of one or more basic blocks included in a frequency transform block composed of a plurality of frequency transform coefficients; and encodes only block information indicating a plurality of frequency transform coefficients of each of the specific basic block and a following basic block in the predetermined scan order.

Claims10

Dependent claims

An encoder which encodes image information, the encoder comprising:

memory;
and
circuitry accessible to the memory,
wherein the circuitry accessible to the memory:
encodes position information indicating a position of a specific basic block which is a basic block including a non-zero coefficient first in a predetermined scan order defined in a descending order of frequencies of one or more basic blocks included in a frequency transform block composed of a plurality of frequency transform coefficients;
and
encodes only block information indicating a plurality of frequency transform coefficients of each of the specific basic block and a following basic block in the predetermined scan order.

4 more elements

A decoder which decodes image information, the decoder comprising:

memory;
and
circuitry accessible to the memory,
wherein the circuitry accessible to the memory:
decodes position information indicating a position of a specific basic block which is a basic block including a non-zero coefficient first in a predetermined scan order defined in a descending order of frequencies of one or more basic blocks included in a frequency transform block composed of a plurality of frequency transform coefficients;
and
decodes only block information indicating a plurality of frequency transform coefficients of each of the specific basic block and a following basic block in the predetermined scan order.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/269,060Filed 6 Feb 2019

Priority

10 Aug 2016

Published

6 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04N 19/13
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: adaptive entropy coding, e.g. adaptive…
H04N 19/129
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: scanning of coding units, e.g. zig-zag scan of…
H04N 19/176
The unit being an image region, e.g. an object: the region being a block, e.g. a macroblock
H04N 19/91
Using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals: entropy coding, e.g. variable length coding [VLC] or…

Encoder, decoder, encoding method, and decoding method

Life of this patent

Encoder, decoder, encoding method, and decoding method

Life of this patent

Abstract

Claims10