Digital audio signal filtering mechanism and method

2006 ◽  
Vol 120 (3) ◽  
pp. 1175
Author(s):  
Philip R. Wiser
Keyword(s):  
Audio Signal ◽  
Digital Audio ◽  
Signal Filtering

Digital Audio Signal Processing: An Anthology

1986 ◽  
Vol 10 (2) ◽  
pp. 77
Author(s):  
James H. Snyder ◽  
John Strawn
Keyword(s):  
Signal Processing ◽  
Audio Signal ◽  
Digital Audio ◽  
Audio Signal Processing

Digital Audio Watermarking Based on QR Decomposition and Dither-Modulation Quantization

2015 ◽  
Vol 713-715 ◽  
pp. 1675-1681
Author(s):  
Lei Shi ◽  
Bai Long Yang ◽  
Peng Hui Wu
Keyword(s):  
Audio Signal ◽  
Qr Decomposition ◽  
Digital Audio ◽  
Test Results ◽  
Arnold Transform ◽  
Robust Test ◽  
Digital Audio Watermarking ◽  
Dither Modulation ◽  
Dct Coefficients ◽  
Good Transparency

An audio digital watermarking algorithm based on QR decomposition and dither-modulation quantization is proposed. Arnold transform is utilized to scramble watermarking image in order to improve the security of the algorithm. Then chaotic sequence encrypts the watermarking which was folded before. DCT coefficients of the original audio signal are selected to embed the encrypted watermarking after QR decomposition. Dither-modulation quantization changes the largest R component values of the QR decomposition. Imperceptibility, security and robust test results show that the present method is more robust, and possesses good transparency and high security compared with the scheme based on SVD and dither-modulation quantization.

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