Audio signal processing based on improved SBC codec algorithm in simultaneous interpretation equipment
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 process-ing experiments,and compared with the original filter bank and modulator of SBC codec audio signal processing results.The test re-sults show that the improved analysis filter bank in this article has a clearer division of the subband signal,and the signals in each fre-quency 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 de-signed 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 ad-vantages in audio signal processing.Replacing the two with the original filter bank and modulator can improve the comprehensive per-formance of the SBC codec and improve the audio signal quality of simultaneous interpretation equipment.
SBC codecaudio signal processingfilter bankmodulatorfacilities for simultaneous interpretation
万方数据
维普
