Extension of a visual saliency guided bit allocation approach using laplace distribution of DCT coefficients

Modification of the quantizer value based on a region´s visual importance within a frame is a popular and widely-used procedure in perceptual video coding. The first contribution of this paper is an alternative modification scheme. Second, our previous work, where we use saliency maps in order to guide the macroblock (MB) mode decision during the ratedistortion optimization process, is extended. Modification of the quantizer value on a MB-level is included. It will be shown that this leads to a further improvement and hence outperforms standalone quantizer manipulation schemes.