A very low bit rate algorithm based on hierarchical subband scanning
Humberto de Jesús Ochoa Domínguez, Alejandra Mendoza, Efrén Gútierrez, Osslan Osíris Vergara Villegas, Javier Andrés González Vega, Leticia Ortega, K.R. Rao · 2007
A very low bit rate algorithm based on hierarchical partition of subbands in the wavelet domain is proposed. The algorithm uses the set partitioning technique to sort the transformed coefficients. The threshold of each subband is calculated and the subbands scanning sequence is determined by the magnitude of the thresholds which establish a hierarchical scanning not only for the set of coefficients with large magnitude, but also for the subbands. The algorithm is less complex computationally than SPIHT and JPEG2000. Results show that the present algorithm provides good image quality for very low bit rates.