This paper describes a computationally efficient hybrid video coding
scheme. The proposed hybrid coding scheme combines the advantages of
simple hardware complexity of the 3-D discrete cosine transform coding
and the high performance of the 3-D set partitioning in hierarchical tree
(3-D SPIHT) coding. The modification of the subband video data in the
wavelet domain is done based on the DCT transformation and the
classification of the coefficient in the low-frequency video subband (LL).
The modification process provides a new subband video data containing
almost the same information of the original one but having smaller
values of the wavelet coefficient. Simulation results of the proposed
method demonstrate that, with a small addition in the computational
complexity of the coding process, the PSNR performance of the proposed
algorithm is much higher than that of the 3-D SPIHT test coder.