Abstract
We present a new subband video coding algorithm with temporally adaptive motion interpolation. In the approach proposed, the reference frames for motion estimation are adaptively selected using temporal segmentation in the lowest spatial subband. Variable target bit allocation for each picture type in a group of pictures is used to allow variable number of reference frames with the constraint of constant output bit rate. Block-wise DPCM, PCM, and run-length coding combined with truncated Huffman coding are used to encode the quantized data in the subbands. Simulation results of the adaptive scheme compare favorably with those of a non-adaptive scheme. >
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