Can you explain the different digital audio file formats used in digital voice recorders?
The following formats are most commonly used:- WAV (.wav) – ” WAVEform audio format” is the uncompressed digital (DPCM) audio format developed by IBM and Microsoft. The format was built into the Windows 95 operating system and quickly became the standard audio file used on PCs. There are various WAV “flavours” – bit resolutions, sample rates, and channels of audio. PCM “Pulse Code Modulation”: WAV files are typically large in size due to the high quality of the format and are used for CDs as well as radio and telephone systems. An average pop music song is around 50 MB in size. DPCM – “Digital Pulse Code Modulation” is the digital representation of the analogue signal. ADPCM “Adaptive Digital Pulse Code Modulation” is a variant of DPCM that reduces the required bandwidth for a given signal-to-noise ratio. Subsequently, further compressed standards were published, some subject to patent and use of these requires payments to the patent holders. As file sharing over the Internet has becom
