基于ARM嵌入式平台的音视频解码播放系统设计与实现  

Design and Implementation of Audio and Video Decoding and Playback System Based on ARM Embedded Platform

作　　者：马骥 MA Ji(Publicity Department,Xi'an Aeronautical Polytechnic Institute,Xi'an 710089,China)

机构地区：[1]西安航空职业技术学院,宣传部,陕西西安710089

出　　处：《微型电脑应用》2023年第8期229-232,共4页Microcomputer Applications

摘　　要：针对传统音视频解码播放系统产生的音频与视频不同步问题,设计了一种基于嵌入式平台的音视频解码播放系统。该系统充分利用嵌入式平台内部的硬核资源,采用开源的Mad函数库对音频ES数据流进行解码,在ALSA函数库和FIMC函数接口的支持下,将解码成功的音频帧和视频帧分别传送至音视频播放设备,以此实现音视频的解码与同步。利用性能测试的方法对系统的解码与同步进行验证,测试结果表明,该系统通过对音视频帧进行同步控制,可实现同步播放音频与视频,最终使音视频PTS数据之间的时间差值趋于稳定状态,有利于提升观众在视觉和听觉方面的感受。The traditional audio and video decoding broadcast system can lead that audio and video are not synchronized,hence,this study designs an audio and video decoding broadcast system based on embedded platform.The system makes full use of embedded platform hardcore of internal resources,uses open source Mad function library to decode audio ES data flow with ALSA function and the interface of FIMC function.The decoded audio frame and video frame are respectively transmitted to the audio and video player equipment to realize the decoding and synchronization of audio and video.With the method of performance test system,decoding and synchronization verification is carried out,test results show that the system can realize synchronous playback of audio and video,time difference value of audio and video PTS data is stable,and it is conducive to improve the audience feelings in the visual and auditory aspects.

关 键 词：ARM嵌入式平台 音视频 解码播放 ALSA函数库 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]