A low-latency system and method for processing airborne Ethernet audio streams

Abstract

The invention discloses a low-latency system for processing airborne Ethernet audio streams, including an audio module, the audio module is connected to an interface module through an FPGA module; the audio module: receives the analog audio processed by the FPGA module to play; collects Send the analog audio to the FPGA module; FPGA module: receive the analog audio sent by the audio module and decode it to obtain digital audio, group the digital audio according to the ARINC628P3 protocol and send it out through the interface module; receive the audio data packet sent by the interface module, according to The ARINC628P3 protocol unpacks and processes the analog audio and sends it to the audio module; interface module: provides the interface between the outside world and the FPGA module, the interface circuit between the FPGA module and the peripheral, and power supply for the device. Provides a low-latency system for processing airborne Ethernet audio streams to solve the problem of stuttering or noise in sound playback due to excessive fluctuations in processing delays.

Description

technical field [0001] The invention relates to an airborne audio data processing system, in particular to a low-latency system for processing airborne Ethernet audio streams. Background technique [0002] The cross-linking method of the airborne avionics system is gradually shifting from traditional low-speed protocols, such as ARINC429, RS485 and other bus protocols, to 100M / 1000M or even 10GbE. The Ethernet implementation in the traditional airborne or computer system is based on the TCP / IP protocol stack implemented by the CPU. Its disadvantage lies in the complexity of the TCP / IP protocol stack and the scheduling algorithm of the CPU. The delay of the Ethernet message depends on the CPU. Scheduling, so the delay jitter is large, and the audio processing cycle defined by ARINC628P3 is 4ms, and the audio playback effect is sensitive to the processing delay. If the processing delay fluctuates too much, the sound playback will appear stuttering or noise, so if you use a tra...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is the high-speed processing of airborne audio, and the purpose is to provide a low-latency system for processing airborne Ethernet audio streams, so as to solve the problem of lagging or noise in sound playback due to excessive fluctuations in processing delays

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