Joint Adaptive Background Skipping and Weighted Bit Allocation for Wireless Video Telephony

In this paper, we propose a novel region-of-interest (ROI) video coding algorithm for wireless video telephony applications. In order to improve the visual quality of the ROI, the proposed approach reallocates bits from Non-ROI macroblocks to ROI by adaptively skipping Non-ROI and using an optimized weighted bit allocation scheme to bias the bit allocation. To the best of our knowledge, this work is the first effort to develop an optimized ρ-domain bit allocation scheme for ROI video coding. Experimental results indicate that the proposed approach significantly outperforms other methods by up to 2dB.