摘要
针对目前数字音频解码器不能对现有主流有线无线数字信号全部解码、信噪比不够等问题,通过蓝牙CSR8675、AK4113、PCM1795等硬件解码模块,设计制作集蓝牙、USB数字信号、数字同轴信号、数字平衡信号及数字光纤音频信号等于一体的解码器,一站式解决有线无线主流信号解码;通过串联稳压电源给解码器供电,减小电源纹波,提高信噪比;使用STC单片机实现数字音频解码器按键音源切换、显示等智能控制,具有较高的市场推广价值。
Aiming at the problems that the current digital audio decoder cannot fully decode the existing mainstream wired and wireless digital signals and the signal-to-noise ratio is insufficient,the hardware decoding modules such as Bluetooth CSR8675,AK4113 and PCM1795 complete the collection of Bluetooth、USB digital signals、digital coaxial signals、and digital signals,balanced signal,digital optical fiber audio signal is equal to an integrated decoder,one-stop solution for wired and wireless mainstream signal decoding;power supply to the decoder through series stabilized power supply,reduce power supply ripple,improve signal-to-noise ratio;use STC microcontroller to achieve digital audio decoder audio source switching,display and other intelligent controls have high market promotion value.
作者
黄春平
HUANG Chunping(School of Information Engineering,Zhongshan Polytechnic,Zhongshan 528404,China)
出处
《电声技术》
2021年第8期75-80,共6页
Audio Engineering
基金
2021年度广东省普通高校特色创新类科研项目(No.2021KTSCX314)
广东省质量工程教育教学改革研究与实践项目(No.GDJG2019490)
中山职业技术学院科研重点课题(No.KYA2104)。
关键词
音频解码
信噪比
前置放大器
audio decoding
signal-to-noise ratio
preamplifier
