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Phase Transmission in Sinusoidal Audio and Speech Coding

In sinusoidal coding, frequency tracks are formed in the encoder and the amplitude and frequency information of a track is transmitted. Phase is usually not transmitted, but reconstructed at the decoder by assuming that the phase is the integral of the frequency. Such a reconstructed phase accumulates inaccuracies, leading to audible artifacts. To prevent this, a mechanism is proposed to transmit phase information of sinusoidal tracks. The unwrapped phase is quantised and transmitted. The frequencies are not transmitted, but restored from the phase information by differentiation.

Authors: den Brinker, Albertus C.; Gerrits, Andy J.; Sluijter, Rob J.
Affiliation: Philips Research Laboratories, Prof. Holstlaan 4 (WY82), Eindhoven, The Netherlands
AES Convention:115 (October 2003) Paper Number:5983 Import into BibTeX
Session Subject:Psychoacoustics; Audio Coding

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