An efficient algorithm for optimizing DCT quantization

Authors:
V. Ratnakar;M. Livny
Affiliations:
Epson Res. & Dev., Palo Alto, CA;-
Venue:
IEEE Transactions on Image Processing
Year:
2000

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Abstract

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