Low Rank Tensor Completion for Recovering Missing Data in Multi-channel Audio Signal
YANG Lidong①② WANG Jing① XIE Xiang① ZHAO Yi① KUANG Jingming①
①(School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China) ②(School of Information Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China)
The data maybe miss due to problems in the acquisition, compression or transmission process of multi- channel audio signal. In order to take audiences real auditory sense, an approach of signal recovery based on low rank tensor completion is proposed. First, multi-channel audio signal is represented as a signal tensor. Second, tensor completion is formulated as a convex optimization problem. A closed form for augmented Lagrangian function is obtained via relaxation technique and separation of variables technique. At last, the audio tensor is recovered by alternating iteration. In experiments of varying number of missing entries, the comparisons show that the proposed method is more accurate than linear prediction and CANDECOMP/PARAFAC weighted optimization. The results of multiple stimuli with hidden reference and anchor indicate that low rank tensor completion method is validated for multi-channel audio signal recovery. The better auditory effects are obtained by recovered audio.
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