Implementation of the FPGA Based Multi-Party Real-Time Digital Audio Mixer 


Vol. 47,  No. 12, pp. 2172-2178, Dec.  2022
10.7840/kics.2022.47.12.2172


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  Abstract

Recently, packet-based communication methods such as VoIP have improved quality due to architectural improvements, which have converged and rapidly spread in various areas such as voice calls, video lessons, and conference solutions. One of the most important voice processing modules in the real-time multi-party audio service is an audio mixer, and since the digital mixer is implemented on a processor basis, the processing speed is limited due to the sequential execution process. In addition, the audio service quality of VoIP is influenced by various environments, especially when the processing time for converting and mixing audio packets is long, the audio service quality cannot be guaranteed. To overcome this, in this paper, a digital audio mixer is designed with FPGA hardware for VoIP multi-party audio signal processing, and audio signal mixing and packet composition are coded in a high-speed parallel processing method to improve audio service quality by minimizing processing time. As a result of verifying the system with the proposed method, it is confirmed that the time required time for mixing audio signals and configuring the packet is within 1.024ms for up to 256 participants, which is much lower than the 20 ms proposed by the RFC 3551 specification.

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[IEEE Style]

D. Oh, S. Baek, H. Choi, "Implementation of the FPGA Based Multi-Party Real-Time Digital Audio Mixer," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 12, pp. 2172-2178, 2022. DOI: 10.7840/kics.2022.47.12.2172.

[ACM Style]

Do-Bong Oh, Seung-Cheol Baek, and Han-Go Choi. 2022. Implementation of the FPGA Based Multi-Party Real-Time Digital Audio Mixer. The Journal of Korean Institute of Communications and Information Sciences, 47, 12, (2022), 2172-2178. DOI: 10.7840/kics.2022.47.12.2172.

[KICS Style]

Do-Bong Oh, Seung-Cheol Baek, Han-Go Choi, "Implementation of the FPGA Based Multi-Party Real-Time Digital Audio Mixer," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 12, pp. 2172-2178, 12. 2022. (https://doi.org/10.7840/kics.2022.47.12.2172)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880