广播音频信号的质量分析与测量

Quality Analysis and Measurement of Broadcast Sound Signal

广播是传递声音信号最传统最广泛的有利媒介。广播电台将丰富的文化资源以节目的形式通过电波载体传播给广大群众,因此广播音频信号质量的好坏对受众的听觉感受有着重要影响,一定程度上反映了广播电台的制作水平与传输能力。目前,对于广播节目内容信号质量的评价分为主观评价和客观评价。主观评价主要依赖人的听觉感受,而客观评价则通过技术指标来反映音频的质量,主要通过对音频信号自身的质量监测与音频设备的音频特性测量来获得相关的指标数据。

Broadcasting is the most traditional and widest favorable medium for transmitting sound signals.Broadcasting stations spread the rich cultural resources to the general public in the form of programs through radio waves.Therefore,the quality of the broadcast audio signal has a crucial impact on the audience’s hearing experience,and to a certain extent reflects the production level and transmission capacity of the broadcast station.At present,the evaluation of the signal quality of broadcast program content is divided into subjective evaluation and objective evaluation.Subjective evaluation mainly depends on human hearing experience.The objective evaluation reflects the audio quality through technical indicators,and obtains relevant indicator data mainly by monitoring the quality of the audio signal itself and measuring the audio characteristics of the audio equipment.