An efficient algorithm for optimizing DCT quantization

We describe the RD-OPT algorithm for DCT quantization optimization, which can be used as an efficient tool for near-optimal rate control in DCT-based compression techniques, such as JPEG and MPEG. RD-OPT measures DCT coefficient statistics for the given image data to construct rate/distortion-specif...

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Bibliographic Details
Published inIEEE transactions on image processing Vol. 9; no. 2; pp. 267 - 270
Main Authors Ratnakar, V., Livny, M.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.02.2000
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Applied sciences
Compressing
Discrete cosine transforms
Discrete transforms
Distortion
Exact sciences and technology
Image coding
Image processing
Information, signal and communications theory
Lagrangian functions
Laplace equations
Optimization
PSNR
Quantization
Rate distortion theory
Rate-distortion
Signal processing
Statistics
Tables
Telecommunications and information theory
Transform coding
Waveform
Experimental result
Algorithm performance
Image processing
Signal quantization
Data compression
Optimization method
Cosine transform
Signal to noise ratio
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Summary:We describe the RD-OPT algorithm for DCT quantization optimization, which can be used as an efficient tool for near-optimal rate control in DCT-based compression techniques, such as JPEG and MPEG. RD-OPT measures DCT coefficient statistics for the given image data to construct rate/distortion-specific quantization tables with nearly optimal tradeoffs.
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ISSN:1057-7149
1941-0042
DOI:10.1109/83.821739