Title :
Audio watermarking in frequency domain using Walsh functions and LDPC codes
Author :
Dymarski, Przemyslaw ; Markiewicz, Robert
Author_Institution :
Inst. of Telecommun., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
An audio watermarking system, operating in logspectrum domain, using M-ary transmission codes based on Walsh functions, is presented. Plain and dirty paper coding schemes are compared. Encouraging results are obtained by using the quaternary dirty paper code and LDPC. The proposed audio watermarking algorithm is robust against MPEG-Audio compression at 96 kbps. The watermark is inaudible according to PEAQ and informal listening tests. Its bit rate, about 40 bps, makes it a useful tool for audio annotation applications.
Keywords :
Walsh functions; audio coding; audio watermarking; data compression; parity check codes; LDPC codes; M-ary transmission codes; MPEG-Audio compression; PEAQ; Walsh functions; audio annotation applications; audio watermarking algorithm; audio watermarking system; bit rate 40 bit/s; bit rate 96 kbit/s; dirty paper coding; frequency domain; informal listening tests; quaternary dirty paper code; Bit error rate; Bit rate; Encoding; Parity check codes; Robustness; Vectors; Watermarking; LDPC; Walsh functions; audio watermarking; dirty paper codes;
Conference_Titel :
Systems, Signals and Image Processing (IWSSIP), 2013 20th International Conference on
Conference_Location :
Bucharest
Print_ISBN :
978-1-4799-0941-4
DOI :
10.1109/IWSSIP.2013.6623477
