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Waveform Coding Techniques - Cisco
https://www.cisco.com/c/en/us/support/docs/voice/h323/8123-waveform-coding.html#:~:text=A-law%20and%20u-law%20are%20audio%20compression%20schemes%20%28codecs%29,data%20down%20to%20eight%20bits%20of%20logarithmic%20data.
Mu-Law and A-Law Compression Tutorial - Jonathan Hays
https://jonathanhays.me/2018/11/14/mu-law-and-a-law-compression-tutorial/
Mu-law (also “u-law”) encoding is a form of logarithmic quantization or companding. It’s based on the observation that many signals are statistically more likely to be near a low signal level than a high signal level. Therefore, it makes more sense to have more quantization points near a low level than a high level.
baudline solution - audio compression codecs
https://www.baudline.com/solutions/codec/index.html
A-law and u-law These companding codecs should have 78 and 84 dB of dynamic range but the SFDR measurements do not reflect this. While the logarithmic transform mappings do support this dynamic range claim the harmonic distortion added by the companding noise cut these claims almost in half. Companding noise is like quantization noise but worse.
Basic Audio Compression - hugi.scene.org
https://hugi.scene.org/online/coding/hugi%2017%20-%20cotadaud.htm
Basic Audio Compression TAD Introduction This article describes some basic audio compression techniques. It is intended to be an introduction into the subject rather than a state-of-the-art code snippet library. If you already know about MP3, compounding and U-law/A-law then this article will probably bore you to tears because it won't cover ...
Law Compression - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/engineering/law-compression
The equation for the μ -law compressor is given by. (10.4) y = sign x ln 1 + μ x x max ln 1 + μ, where | x | max is the maximum amplitude of the inputs, while μ is a positive parameter to control the degree of the compression. μ = 0 corresponds to …
5.3.8 Algorithms for Audio Companding and …
http://digitalsoundandmusic.com/5-3-8-algorithms-for-audio-companding-and-compression/
5.3.8.1 Mu-law Encoding. Mu-law encoding (also denoted μ-law) is a nonlinear companding method used in telecommunications. Companding is a method of compressing a digital signal by reducing the bit depth before it is transmitted and then expanding it when it is received. The advantage of mu-law encoding is that it preserves some of the dynamic range that would be …
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