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A comparison of Internet audio compression formats
https://sericyb.com.au/audio.html#:~:text=mu-law%20mu-law%20is%20the%20international%20standard%20telephony%20encoding,dropping%20the%20least%20significant%203%20bits%20of%20precision.
µ-Law Compressed Sound Format
https://www.loc.gov/preservation/digital/formats/fdd/fdd000039.shtml
"Mu-law (also written µ-Law) is the encoding scheme used in North America and Japan for voice traffic. A-Law (or a-Law) is used in Europe and throughout the rest of the world. The two schemes are very similar. Both break the total dynamic range into eight positive and eight negative segments.
5.3.8 Algorithms for Audio Companding and …
http://digitalsoundandmusic.com/5-3-8-algorithms-for-audio-companding-and-compression/
Mu-law encoding (and its relative, A-law, which is used Europe) reduces the amount of data in an audio signal by quantizing low-amplitude signals with more precision than high amplitude ones. However, since this bit-depth reduction happens in conjunction with digitization, it might more properly be considered a conversion rather than a compression method.
How To Make CCITT mu-law Files For Older IVR Systems Using ...
https://www.vo2gogo.com/how-to-make-ccitt-mu-law-files-for-older-ivr-systems-using-audacity/
CCITT mu-law (aka U-law) 8k 8-bit mono wav files. My client at AOL confirmed that they worked perfectly on their older systems, and actually sounded better than any of the BarbaBatch converted samples.
A comparison of Internet audio compression formats
https://sericyb.com.au/audio.html
8KHz mono audio formats; Audio format 16-bit PCM G.711 mu-law 32Kbps MPEG-1 IMA/DVI ADPCM GSM 06.10 InterWave VSC112 TrueSpeech 8.5 RealAudio v1.0 ToolVox for the Web; File extension.wav or .aiff.au.mpa or .mp2.wav.gsm.vmf.wav.ra.vox: Data rate: 128Kbps: 64Kbps: 32Kbps: 32Kbps: 13.2Kbps: 11.2Kbps: 8.5Kbps: 8Kbps: 2.4Kbps: File size per minute: 960K: …
AudioFormat.Encoding (Java Platform SE 7 )
https://docs.oracle.com/javase/7/docs/api/javax/sound/sampled/AudioFormat.Encoding.html
Besides PCM, other encodings include mu-law and a-law, which are nonlinear mappings of the sound amplitude that are often used for recording speech. You can use a predefined encoding by referring to one of the static objects created by this class, such as PCM_SIGNED or PCM_UNSIGNED.
PCM Audio - COMPLETE GUIDE AND REFERENCE
https://planethifi.com/pcm-audio/
An ADPCM algorithm is used to map a series of 8-bit PCM audio Mu-Law or A-Law samples into a series of 4-bit ADPCM samples. In this way, the capacity of the line is doubled. The technique is detailed in the international standard G.726.
YoungEngineering A-Law and Mu-Law Companding
http://young-engineering.com/docs/YoungEngineering_ALaw_and_MuLaw_Companding.pdf
A-Law/Mu-Law Companding Young Engineering: www.young-engineering.com Page 3 of 4 m-Law Compander The United States and Japan use µ-law companding. Limiting the linear sample values to 13 magnitude bits, the µ-law compression is …
G711.org - Telephony File Converter
G711 File Converter. This free tool will convert just about any DRM-free media file into audio that's compatible with most telephony vendors' Music on Hold and IVR Announcements. Source File. Browse. Note: 50MB Maximum File Size. Output Format. u-law WAV (8Khz, Mono, u-law) a-law WAV (8Khz, Mono, a-law) Standard Definition WAV (8Khz, Mono, 16 ...
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