Implementation of Internet Audio Transmission System via Clock Correction

Abstract:

Purpose of this research wants to use a device, called Dante board, the board enabled AD converter. It digitalizes audio and transmits the audio using TCP/IP technology through cat5 cable to replace the expensive analog cable used in the past. Still, there are some problems needed to be overcome. First of all, during the analog-to-digital process, distorted audio issues are often encountered due to inconsistency of the encoder during digital sampling. In order to compensate the distortion during the conversion, frequency needs to be filtered out to compensate or attenuate. Secondly, due to delay in Internet transmission, the audio outputs by each device may not be synchronized. Therefore, each device needs to have its own clock to overcome the delay and reach the synchronized effect through clock synchronization. Also, the IEEE1588 precision time protocol (PTP) is used in clock synchronization to synchronize the audio in each device.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 3438-3443
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.3438
• Online since: January 2013
• Authors: Jia Shing Sheu, Ho Nien Shou, Wei Jun Lin, Wen Chin Chung
• Keywords: Clock Synchronization, IEEE1588, Precision Time Protocol (PTP)

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