Deadzone Based Rate Allocation for JPEG XR

Author

Richter, Thomas

Author_Institution

Univ. of Stuttgart, Stuttgart, Germany

fYear

2011

fDate

29-31 March 2011

Firstpage

474

Lastpage

474

Abstract

The JPEG XR image compression solely controls the image quality loss and hence the output rate by means of the quantizer bucket sizes; a precise rate control mechanism like the EBCOT rate allocation algorithm in JPEG 2000 is not specified, and hence rate-distortion optimality of the quantizer is, in general, not given. A simple rate-control mechanism for JPEG XR is introduced that allows an efficient control of the quantizer towards rate-distortion optimality. It was seen in an earlier work that the additional side information required for the spatial varying quantization mechanism of the standard almost compensates the PSNR gain and complicates the rate allocation process by requiring an additional quantizer allocation step.

Keywords

image coding; quantisation (signal); rate distortion theory; EBCOT rate allocation; JPEG 2000; JPEG XR image compression; deadzone based rate allocation; image quality loss; quantizer allocation step; quantizer bucket sizes; rate control; rate-distortion optimality; Image coding; PSNR; Quantization; Rate-distortion; Resource management; Transform coding; JPEG XR!!; Quantization; Rate-Distortion Optimal Quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Data Compression Conference (DCC), 2011

Conference_Location

Snowbird, UT

ISSN

1068-0314

Print_ISBN

978-1-61284-279-0

Type

conf

DOI

10.1109/DCC.2011.78

Filename

5749531