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

An Ethernet, low-latency technology, applied in the field of airborne audio data processing systems, can solve problems such as processing delay fluctuations, loud voice playback stuttering or noise, etc.

Active Publication Date: 2020-11-06
CETC AVIONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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Embodiment 1

[0059] Such as figure 1 , 2 Shown, the present invention a kind of system of low-latency processing airborne Ethernet audio flow, comprises audio module, and described audio module is connected with interface module through FPGA module;

[0060] Audio module: receive and play the analog audio processed by the FPGA module; collect analog audio and send it to the FPGA module;

[0061] 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, and perform unpacking and post-processing according to the ARINC628P3 protocol Send to the audio module for analog audio;

[0062] Interface module: provide the interface between the outside world and the FPGA module, the interface circuit between the FPGA module and the peripheral, and the power supply of the device.

[0063] The ...

Embodiment 2

[0072] In this embodiment, a low-latency method for processing an onboard Ethernet audio stream includes the following steps:

[0073] A. Process the external analog audio signal through the FPGA and send it out as an audio data packet that meets the ARINC628P3 protocol;

[0074] B. Process the audio data packets sent externally that meet the ARINC628P3 protocol into analog audio signals for playback.

[0075] In the described step A, the method that the external analog audio signal is processed by the FPGA as an audio data packet that meets the ARINC628P3 protocol and sends out includes the following steps that are carried out in sequence:

[0076] A1. Receive external analog audio signals through the audio module;

[0077] A2. The audio module processes the analog audio signal FPGA module, and the FPGA module processes the analog audio signal into a digital audio signal;

[0078] A3. According to the ARINC628P3 protocol, the FPGA module realizes the grouping of digital aud...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L65/70
Inventor 何万昊
Owner CETC AVIONICS
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