同声传译设备中基于改进SBC编解码器算法的音频信号处理  

Audio signal processing based on improved SBC codec algorithm in simultaneous interpretation equipment

作　　者：王琪 WANG Qi(Weinan Vocational and Technical College,Weinan Shaanxi 714000,China)

机构地区：[1]渭南职业技术学院,陕西渭南714000

出　　处：《自动化与仪器仪表》2024年第2期64-67,72,共5页Automation & Instrumentation

基　　金：2022年陕西省职业技术教育学会课题《课程思政视角下的高职公共英语教学改革路径-以渭南职业技术学院为例》(2022SZX440)。

摘　　要：为了提高英语同声传译员的工作效率和质量,对同声传译设备中的SBC编解码器算法进行了改进与设计,提高了其对音频信号处理的能力。首先,对主要研究内容进行了探讨;其次,分别对SBC编解码器中的滤波器组算法和调制器算法进行了改进与设计;第三,对设计的滤波器组和调制器进行音频信号处理实验测试,并将其与SBC编解码器原有的滤波器组和调制器的音频信号处理结果进行对比。测试结果表明:改进后的分析滤波器组对子带信号的划分更为清晰,各个频带信号都集中分布在与之对应的子带中,几乎不存在相互干扰的情况;当子带数等于4时,经过改进后设计的滤波器组的E_(pp)比SBC编解码器中的E_(pp)减少了4.007,E_(a)减少了0.839;当子带数等于8时,E_(pp)减少了2.758,E_(a)减少了0.371;设计的ADPCM调制器的平均分段信噪比为117.64 dB,比SBC原本的调制器平均提高了28.73。可见改进后设计的滤波器组性能更佳,改进的调制器在音频信号处理方面更有优势,将两者与原本的滤波器组和调制器替换后能够提高SBC编解码器的综合性能,提高同声传译设备的音频信号质量。In order to improve the efficiency and quality of English simultaneous interpreter,this paper improves and designs the SBC codec algorithm in simultaneous interpreter equipment and improves its ability to handle audio signal processing.Firstly,the main research content of this article was discussed;Secondly,improvements and designs were made to the filter bank algorithm and modulator algorithm in the SBC codec;Thirdly,the filter bank and modulator designed in this paper are tested in audio signal processing experiments,and compared with the original filter bank and modulator of SBC codec audio signal processing results.The test results show that the improved analysis filter bank in this article has a clearer division of the subband signal,and the signals in each frequency band are concentrated in their corresponding subbands,with almost no mutual interference;When the number of subbands is equal to 4,the improved filter bank designed in this paper reduces 4.007 and 0.839 compared to the SBC codec;When the number of subbands equals 8,it decreases by 2.758 and 0.371;The average segmented signal-to-noise ratio of the ADPCM modulator designed in this article is 117.64dB,which is an average improvement of 28.73 compared to the original modulator of SBC.It can be seen that the filter bank designed after improvement in this paper has better performance,and the improved modulator has more advantages in audio signal processing.Replacing the two with the original filter bank and modulator can improve the comprehensive performance of the SBC codec and improve the audio signal quality of simultaneous interpretation equipment.

关 键 词：SBC编解码器 音频信号处理 滤波器组 调制器 同声传译设备 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]