1. Raut, R., Sawant, R., Madbushi, S.: Cognitive Radio Basic Concepts Mathematical Modeling and Applications, 1st edn. CRC Press, Boca Raton (2020)
2. Gunjal, S.D., Raut, R.D.: Advance source coding techniques for audio/speech signal: a survey. Int. J. Comput. Technol. App. 3(4), 1335–1342 (2012)
3. Spanias, A., Painter, T., Atti, V.: Audio Signal Processing and Coding. Wiley, USA (2007)
4. Rao, P.S., Krishnaveni, G., Kumar, G.P., Satyanandam, G., Parimala, C., Ramteja, K.: Speech compression using wavelets. Int. J. Mod. Eng. Res. 4(4), 32–39 (2014)
5. James, J., Thomas, V.J.: Audio compression using DCT and DWT techniques. J. Inf. Eng. App. 4(4), 119–124 (2014)