PD controller with LPF based jitter buffer for real-time communication

Abstract

This paper proposes a jitter buffer for IP-based network which regulates packet-receiving interval. The proposed method utilizes a PD controller to adjust queue length of the jitter buffer to avoid overrun and underrun. In addition, the derivative value of packet-receiving interval is converged to zero by a low-pass filter. Proposed jitter buffer improves control performance of feedback control systems including time-varying delay elements. Validity of the proposed method is confirmed by experiments of position control through a network emulator.