US 2011/0216830 A1Published application

Moving image encoder and moving image decoder

AssigneeMitsubishi Electric Corporation

InventorsYoshimi Moriya, Yoshihisa Yamada, Shunichi Sekiguchi, Yoshiaki Kato

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Abstract

A moving image encoder has an image separating unit (1) for generating four separate images (1)-(4) by sampling pixels constituting an input image every two alternate pixels in the horizontal direction and each alternate pixel in the vertical direction. An intraframe predictive coding unit performs intraframe predictive coding of the separate image (1) by using pixels constituting the separate image (1) produced by the image separating unit (1). An inter-separate image predictive coding unit 12 performs inter-separate image predictive coding of the separate images (2)-(4) produced by the image separating unit 1 by using the pixels constituting the separate image (1) produced by the image separating unit (1).

Claims9

Dependent claims

A moving image encoder comprising:

a separate image generating unit for producing a first separate image by sampling pixels constituting an input image at predetermined intervals, and for producing at least one second separate image by sampling pixels different from the foregoing pixels at predetermined intervals;
an intraframe predictive coding unit for carrying out predictive coding of the first separate image within a frame by using the pixels constituting the first separate image produced by the separate image generating unit;
an inter-separate image predictive coding unit for carrying out, between the separate images, predictive coding of the second separate image produced by the separate image generating unit by using the pixels constituting the first separate image produced by the separate image generating unit;
and
a multiplexing unit for generating a bit stream by multiplexing coded data of the first separate image output from the intraframe predictive coding unit and coded data of the second separate image output from the inter-separate image predictive coding unit.

2 more elements

A moving image decoder comprising:

a coded data separating unit for receiving a bit stream into which coded data of a first separate image and coded data of a second separate image are multiplexed, and for separating the coded data of the first separate image and the coded data of the second separate image from the bit stream;
an intraframe predictive decoding unit for obtaining a decoded image of the first separate image by decoding the coded data of the first separate image separated by the coded data separating unit;
and
an inter-separate image predictive decoding unit for obtaining a decoded image of the second separate image by decoding the coded data of the second separate image separated by the coded data separating unit by using the decoded image of the first separate image obtained by the intraframe predictive decoding unit.

1 more element

Dependencies are inferred from the claim text.