Finite-precision Analysis of the JPEG-2000 Compression Standard

This paper describes a detailed study of the effect of finite-precision computation on wavelet-based image compression. Specifically, we examine how the quality of the final decoded image is affected by various choices that a hardware designer will have to make, such as choice of wavelet (integer or real), fixed-point attributes (number of integer and fractional bits), and compression. The algorithm studied here is that adopted by the JPEG 2000 committee, and it uses trellis-coded quantization on the wavelet coefficients, followed by bit-plane coding. The Cadence signal processing worksystem (SPW), beta version SPW 4.5, was used to simulate JPEG 2000. A polymorphic simulation model was used to evaluate fixed-point effects. The version of JPEG 2000 studied corresponds to VM2.0 (Verification Module 2.0) of the committee's software. Since then, the JPEG 2000 standard has undergone changes.

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