Clock skew compensation

Details Clock skew compensation Clock skew compensation

2011-05-24

2011-05-24

Vu, Huy D (Department: 2461)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S516000

Reexamination Certificate

active

07949015

ABSTRACT:
A method and arrangement in a receiving communication device for compensating for the difference between the clock-frequency controlled sample rate of the receiving device and the sample rate of a sending communication device. The sending device transmits packets comprising M audio samples to be stored in a buffer in the receiving device accommodating at least 2·M samples before play-out. An estimation of the clock skew is continuously updated from a calculated accumulated difference between an expected and an actual point of time of reception of the M audio samples. Before play-out, an adjusted number N of audio samples to be read from the buffer before play-out is calculated using the estimated clock skew. Thereafter, the N audio samples are resampled by interpolation to M audio samples to play-out.

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Miljkovic D et al. “Clock skew Compensation by Speech Interpolation” International Conference on Digital Telecommunications, Aug. 29-31, 2006, USA, 6 pp, ISBN 0-7695-2650-0 abstract.

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