Synchronism Architecture Implementation for High Quality Audio Processing and Transmission

Abstract: Transmission of high quality audio over telecom networks requires specific synchronization schemes. It is necessary to maintain a high grade of fidelity over several signal parameters. Particularly important is to achieve a effective synchronization between source and destination. Deviation in sampling frequencies implies distortions, especially noticeable in high quality audio. In the case of transmission over a standard telecom network, is possible is to extract the network synchronism and reuse it to generate the sampling frequency and processor clock at both ends. The contribution of this paper is the description of an implemented design for a generic architecture allowing locking network clock and necessary synchronism for audio processing at both ends of the communication network. Illustrated design is applicable to multi-codec and multi-channel architectures where global common synchronization is required