Adaptive Orthogonal Transform for Motion Compensation Residual in Video Compression
- Cite this paper as:
- Gu Z., Lin W., Lee B., Lau C.T. (2011) Adaptive Orthogonal Transform for Motion Compensation Residual in Video Compression. In: Lee KT., Tsai WH., Liao HY.M., Chen T., Hsieh JW., Tseng CC. (eds) Advances in Multimedia Modeling. MMM 2011. Lecture Notes in Computer Science, vol 6523. Springer, Berlin, Heidelberg
Among the orthogonal transforms used in video and image compression, the Discrete-Cosine-Transform (DCT) is the most commonly used one. In the existing video codecs, the motion-compensation residual (MC-residual) is transformed with the DCT. In this paper, we propose an adaptive orthogonal transform that performs better on the MC-residual than the DCT. We formulate the proposed new transform based on L1-Norm minimization with orthogonal constraints. With the DCT matrix as the starting point, it is guaranteed to derive a better orthogonal transform matrix in terms of L1-Norm minimization. The experimental results confirm that, with little side information, our method leads to higher compression efficiency for the MC-residual. Remarkably, the proposed transform performs better in the high/ complex motion situation.
KeywordsMotion Compensation Residual Transform Coding L1-Norm Minimization Orthogonal Constraints Video Coding
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