Method and apparatus for scalable encoding and decoding color video

Abstract

A scalable encoding and decoding method and apparatus based on color information of moving pictures are provided. The color video encoding method comprises: generating an encoded luminance bitstream by encoding a luminance component using a motion prediction based encoding method; and generating at least one encoded chrominance bitstream by encoding at least one color format chrominance component using a motion vector generated by the motion prediction based encoding method. Using this method, storage, transmission, and reproduction of a moving picture can be efficiently performed by scalably encoding the moving picture according to a color format in which the moving picture is encoded.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2004-0055081 filed with the Korean Intellectual Property Office on Jul. 15, 2004, the entire disclosure of which is hereby incorporated by reference. technical field [0002] Apparatuses and methods consistent with the present invention relate to scalable encoding and decoding of moving pictures, and more particularly, to scalable encoding and decoding based on color information of moving pictures. Background technique [0003] When encoding a moving image, the color format of the moving image is expressed using a ratio of luminance and chromaticity of a pixel contained in a pixel line extending in the horizontal direction of the moving image. Hereinafter, luminance is represented by Y, and chromaticity is represented by Cb / Cr. The brightness represents the brightness of an image, and in the ITU-R standard, the brightness of a pixel is represented b...

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Problems solved by technology

However, since Y, i.e. luminance, is equal in all color formats, it is inefficient to repeatedly encode luminance Y when encoding a moving image in a different color format

[0005] In conventional moving image coding techniques proposed by standards such as MPEG-2, MPEG-4, and the Joint Video Team (JVT) standard, since the 4:4:4 color format, 4:2:2 color format, and When the :2:0 color format encodes moving images, the luminance Y is repeatedly encoded, so when storing or transmitting moving images encoded in multiple color formats, the amount of data becomes unnecessarily large and the encoding efficiency is low

[0006] Furthermore, in conventional motion picture coding techniques, methods for scalable coding or decoding of color picture formats have not been developed

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