Rate-distortion optimal thresholding in SNR scalability based on 2D dynamic programming

Thresholding is a technique for suppressing small transform coefficients in DCT-based coding. Recently dynamic programming has been presented to optimise thresholding in a rate-distortion sense. This contribution investigates the extension of this method for SNR scalability. Because of the tight coupling between base and enhancement layer in SNR scalability, a 2D dynamic programming algorithm has been developed.