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MODIFIED IMDCT-DECODER BASED MP3 MULTICHANNEL AUDIO DECODING SYSTEM

Shanmuga Raju.S, Karthik.R, Sai Pradeep.K.P, Varadharajan.E

The MP3 multi-channel system is composed of two components, a parametric multi-channel decoder and an MP3 decoder. This paper proposes the Enhancement of the audio system by reducing the delay and increasing the audio efficiency with less consumption. This paper presents an advanced mp3 decoding system to play high quality multichannel audio by consuming low processing power. The proposed method uses effective FFT for the computation part and optimizes the IMDCT (inverse modified discrete cosine transforms). This optimization of IMDCT results in the removal of the delay of 31 samples which existed in the previous existing system. Later this optimized output is fed into FFT for computation and is passed into further blocks like phase compensator, re-ordering and synthesis filter. This proposed method uses PQMF (Pseudo code quadrature mirror filter) for the decoding purpose.