To reconstruct an audio waveform samples must be located precisely in time. Practical systems have sources of jitter described by both correlated and uncorrelated elements that result in low-level distortion. However, less well known is how different forms of jitter distort an audio signal. Jitter theory is developed to produce a simulator to enable jitter induced distortion to be determined. Distortion spectra can then be observed and time domain distortion auditioned. Jitter induced distortion is compared to a range of errors, including DAC errors and incorrect use of dither. System architectures studied include LPCM with up-sampling and noise shaping and SDM.
Author:
Hawksford, Malcolm J.
Affiliation:
University of Essex
AES Convention:
121 (October 2006)
Paper Number:
6864
Publication Date:
October 1, 2006
Session Subject:
High Resolution; Live Sound
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