Rate-Distortion Modeling for Wavelet Video Coders
Mingshi Wang, Mihaela van der Schaar · 2006
Based on our statistical investigation of a typical 3D (t+2D/2D+t) wavelet codec, we present a unified mathematical model to describe its rate-distortion (RD) behavior. We assess the quantization distortion of the reconstructed video frames by tracking the quantization noise along the 3D wavelet decomposition trees. The minimum bit rate to achieve this distortion is estimated by the unconditional entropy of the quantizer. Experimental results show that the model captures sequence characteristics accurately and reveals the relationship between wavelet decomposition levels and the overall RD performance.