Algorithm for Digital Speech Compression of K-L Transform
Xiaohang Li, Zhancai Jiang · 2015
To realize effectively compression of digital speech, a kind of speech framing compression algorithm based on K-L transform is put forward.Covariance matrix is constructed by speech frame vectors; orthogonal matrix corresponding to frame is got by decomposing eigenvalues of covariance matrix; the transform coefficient vector is got by orthogonal transform of frame vectors with orthogonal matrix, and it is truncated; then frame vectors are reconstructed by truncated transform coefficient vector; finally, the compression of frame vectors is realized by extracting.Simulation experiments show that the algorithm has high data compression rate, reconstituted speech is clear and natural, what's more, good self-adaption denoising of speech is realized.