What is ADPCM?
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Loading ...ADPCM is a compressed WAV format and stands for Adaptive Differential Pulse Code Modulation which compresses from 16-bit to 4-bit for a 4:1 compression ratio. It’s a ITU-TS standard technique for voice encoding and compression. It allows an analog to be carried within a 32Kbit/s digital channel.
This method of encoding sound data files takes up less storage space than the regular PCM format used by WAV and AIFF files. ADPCM comes in more than one flavor: IMA ADPCM is used on the Sony MiniDisc to cram more data onto a smaller platter; Microsoft ADPCM is used as part of Windows canon of audio codecs. Many MP3 players use ADPCM for their voice-recording feature.
Pulse-code modulation (PCM) is a modulation technique invented by Alec Reeves in 1937. It is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals. Every sample is quantized to a series of symbols in a digital code, which is usually a binary code. PCM is used in digital telephone systems. It is also the standard form for digital audio in computers and various compact disc formats.
Tags: adpcm, aiff, compressed, microsoft, pcm, sony, voice recording, wavRelated posts
Tags: adpcm, aiff, compressed, microsoft, pcm, sony, voice recording, wav