Sound recording quality, whether digital or analogue, presupposes true-to-life recording of the original audio signal. Contemporary audio media do not meet the requirements of high-fidelity recording since they do not...Sound recording quality, whether digital or analogue, presupposes true-to-life recording of the original audio signal. Contemporary audio media do not meet the requirements of high-fidelity recording since they do not insufficiently utilize the bandwidth for D/A conversion and sufficient word length. This paper deals with the values of these parameters in high-fidelity recording. The paper presents the results of a research into characteristics of faithful and high-fidelity audio recording considering the frequency range, signal-to-noise ratio and dynamic range.展开更多
文摘Sound recording quality, whether digital or analogue, presupposes true-to-life recording of the original audio signal. Contemporary audio media do not meet the requirements of high-fidelity recording since they do not insufficiently utilize the bandwidth for D/A conversion and sufficient word length. This paper deals with the values of these parameters in high-fidelity recording. The paper presents the results of a research into characteristics of faithful and high-fidelity audio recording considering the frequency range, signal-to-noise ratio and dynamic range.
文摘针对现有广播现场录音设备存在的问题,开展基于高级精简指令集机器(Advanced RISC Machine,ARM)平台的便携式录音采集设备研发。设备以ARM Cortex-A53处理器为核心,集成24位高精度音频采集模块、1 dB步进可编程增益放大器及嵌入式多媒体卡(embedded Multi Media Card,eMMC)固态存储,配备低功耗管理与快速启动机制。经过高噪声环境实测,该设备在信噪比、响应速度、续航能力及增益精度方面均显著优于传统设备,能够满足广播级现场录音需求。
