Abstract: In order to improve the reconstruction accuracy of the speech signal in the complex environment, the reconstruction method based on orthonormal block diagonal blind compressed sensing theory is proposed, the method finds a pair of matrices by optimal solving, to reconstruct the speech signal. The algorithm takes on higher adaptability; ensures blind compressed sensing theory having a unique solution and can restore the original speech signal in a complex environment. The method ensures sound effects, and greatly reduces the observation dimension. Experimental result shows that blind the compressed sensing based on OBD-BCS (Orthogonal Block Diagonal Blind Compressed Sensing) structure algorithm can achieve high-quality reconstruction of a speech signal.

Key words: signal reconstruction, blind compressed sensing, orthogonal block diagonal, speech signal