INTER FRAME CODING WITH TEMPLATE MATCHING SPATIO-TEMPORAL PREDICTION (MA-P6)

Author(s) : Kazuo Sugimoto (NTT DoCoMo, Inc., Japan) Sadaatsu Kato (NTT DoCoMo, Inc., Japan) Choong Seng Boon (NTT DoCoMo, Inc., Japan) Mitsuru Kobayashi (NTT DoCoMo, Inc., Japan) Yoshinori Suzuki (NTT DoCoMo, Inc., Japan)

Abstract : A new algorithm is proposed for predicting pixels for inter frame coding without side information. Many approaches in the past exploited either spatial or temporal correlations for generating prediction signals of an image in a block-by-block basis. Our method proposed in this paper exploits both spatial and temporal correlations at once to predict the pixels to be encoded. The prediction is achieved by using a template matching mechanism, with reference to previously reconstructed frames, to fill in the pixels of target regions of a frame. This process is conducted at both the encoder and decoder, and hence allows the decoder to produce the same predictor as the encoder does without any side information. Our coder uses the conventional motion compensation means in addition to the proposed prediction. Simulation results show that our approach achieves up to 9.2% of improvements at the same PSNR when compared to the one which uses conventional block-based motion compensation.

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