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High-quality audio transform coding at 64 kbps

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2 Author(s)
Mahieux, Y. ; CNET, Lannion, France ; Petit, J.P.

This paper presents a transform coding algorithm devoted to high quality audio coding at a bit rate of 64 kbps per monophonic channel. It enables the transmission of a high quality stereo sound through the basic access (2B channels) of ISDN. Although a complete system including framing, synchronization and error correction has been developed, only the bit rate compression algorithm is described here. A detailed analysis of the signal processing techniques such as the time/frequency transformation, the pre-echo reduction by adaptive filtering, the fast algorithm computations, etc., is provided. The use of psychoacoustical properties is also precisely reported. Finally, some subjective evaluation results and one real time implementation of the coder using the ATT DSP32C digital signal processor are presented

Published in:

Communications, IEEE Transactions on  (Volume:42 ,  Issue: 11 )

Date of Publication:

Nov 1994

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