Color space scalable video coding and decoding method and apparatus for the same

Abstract

A color space scalable video coding and decoding method and an apparatus for the same are disclosed that can adjust color components or color depth according to the performance of a decoder side. The color space scalable video coding method includes generating transform coefficients by removing the temporal redundancy and spatial redundancy of input video frames, quantizing the transform coefficients, generating a bit stream by entropy coding the quantized transform coefficients, and generating a color space scalable bit stream that includes the bit stream and position information of luminance data in the bit stream.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation of application Ser. No. 11 / 367,453 filed Mar. 6, 2006, which claims benefit of Provisional Application No. 60 / 658,166 filed Mar. 4, 2005. The entire disclosures of the prior applications, application Ser. Nos. 11 / 367,453 and 60 / 658,166 are considered part of the disclosure of the accompanying continuation application and are hereby incorporated by reference. [0002] This application claims priority from Korean Patent Application No. 10-2005-0036289 filed on Apr. 29, 2005 in the Korean Intellectual Property Office, and U.S. Provisional Patent Application No. 60 / 658,166 filed on Mar. 4, 2005 in the United States Patent and Trademark Office, the disclosures of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates to a color space scalable video coding and decoding method and an apparatus for the same, and more part...

AI Technical Summary

Benefits of technology

The present invention provides a color space scalable video coding and decoding method that allows for the position of luminance data to be informed in a bit stream. This allows for a decoder to extract information on the color depth capacity of a display device and decode video frames accordingly. The method also includes generating a bit stream by removing temporal and spatial redundancy from input video frames, quantizing transform coefficients, and generating a color space scalable bit stream that includes the bit stream and position information of luminance data. The invention also provides a method of transferring data of a slice that contains a plurality of macroblocks with luminance data and chrominance data of the macroblocks. The invention also provides a method of processing a video sequence that is transferred separately with luminance data or chrominance data of the plurality of macroblocks. The technical effects of the invention include improved video quality and flexibility in video coding and decoding.

Problems solved by technology

The existing text-centered communication systems are insufficient to satisfy consumers' diverse desires, and thus multimedia services that can accommodate diverse forms of information such as text, images, music, and others, are increasing.

Since multimedia data is large, mass storage media and wide bandwidths are required for storing and transmitting multimedia data.

However, since the existing scalable video coding cannot provide scalability in a color space, even a display device that requires a grayscale image instead of a color image must receive and decode the color image, which is unnecessary and inefficient.

Further, it is inefficient for a display device that is unable to display an image having a color depth of 24 bits to receive and decode a bit stream coded with a color depth of 24 bits and then truncate unnecessary bits from the decoded bit stream.

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