When delivering video over communication network, it is required to transcode the pre-coded video content to meet the demands of a broad range of end users with different bandwidth and resource constraints. One solution to transmit video over bandwidth-constrained channels is to reduce the spatial resolution of video frame and transmit a low-resolution version of video as a tradeoff for the bit-rate. In this paper, an arbitrary downsizing algorithm is proposed. This arbitrary downsizing algorithm is processed directly in the DCT domain. Experimental results show that the proposed method can achieve a satisfied performance. Compared with the existing methods, this algorithm is not only applicable to intra coding frame but also inter coding frame. This is one of the crucial features of this method.
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