Lossless Compression of Audio

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Lossless compression of audio is being popular during the last few decades due to rapid and advanced technology of high quality sound production improved. Lossless compression is a class of compression algorithms that allows the original data to be reconstructed perfectly from the compressed one while for lossy compression, it permits reconstruction only approximate to the original one and it is commonly allows for improved compression rates and smaller in file size. Speech coding can be defined as the act of transforming the speech signal to a more compact form in smaller memory. The access to unlimited bandwidth is impossible. Thus, code and compressing of speech signal are needed. Since speech compression required in long-distance communication, high-quality speech storage, and message encryption, many users need to share the same frequency bandwidth in digital cellular technology. The solution is by utilizing speech compression makes it possible for more users to share the available system. Speech coding is a lossy type of coding. The output signal does not exactly sound like the input. Audio coding tries to code the audio in a perceptually lossless way. The sound at the output is the similar as the input even though the input and output signals are not mathematically equivalent. This type of coding is commonly used for audio storage, broadcasting as well as Internet streaming . There are several techniques of speech coding for example Linear Predictive Coding (LPC), waveform coding and subband coding (Abdul et.al ,2003). According to Gersho (1994), speech coding can be divided into two categories which are waveform coders and vocoders. The term vocoder is combination from voice and coder term. The waveform coder provides t... ... middle of paper ... ...016-1019 [4] Hussain et.al (2010). A Theory of Lossless Compression of High Quality Speech Signals with Comparison, IEEE Computer Society, doi 10.1109 ,pp 136-141 [5] R.Yu and C.C.Ko (2003). Lossless Compression of Digital Audio Using Cascaded RLS-LMS Prediction, Ieee Transactions On Speech And Audio Processing, Vol. 11, No.6, November [6] A. Gersho. Advances in Speech and Audio Compression (1994). In proceedings of the IEEE, VOL. 82, NO. 6, pp 901 [7] A. M. M. A, A. Najih, A. R. Ramli, A. Ibrahim, Syed A.R. (2003). Comparing Speech Compression Using Wavelets with Other Speech Compression Schemes, in (SCORed)IEEE Proceedings, pp 55 [8] J Bradbury (2000) . Linear Predictive Coding, Mc G. Hill Retrieved from my.fit.edu,pp 4 [9] H.S. Malvar Lossless and Near-Lossless Audio Compression Using Integer- Reversible Modulated Lapped Transforms Microsoft Research, pp 3 [10]

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