We propose a new transcoding method to control the picture quality dependently on the view focus. In the proposed method, the quantization step-size obtained by the homogeneous or heterogeneous approach is reassigned to improve the subjective picture quality. The smaller value of quantization step-size is assigned to more important position from view point but the larger value of quantization step-size is assigned to less important position. From the simulation, we show that the proposed method can make better subjective picture quality relatively in parts of center of displayed picture, more important position of view point.

Transcoding, Subjective picture quality, View foucs, Quantization step-size