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9. Noise Shaping - Digital Audio Fundamentals

Noise shaping is a technique used alongside dithering to spectrally shape the noise associated with the process of quantization. Noise shaped audio has a higher dynamic range. The quantization noise is redistributed to less sensitive frequency bands so that it's less perceptible to our ears. In this video we'll talk about the absolute threshold of hearing curve, a holistic view of the filtering and shaping process, the POW-R (Psychoacoustically Optimized Wordlength Reduction) algorithms and a small anecdote on the history of analog dither. Find the full playlist here:    • Digital Audio Fundamentals   Content: 0:00 Noise shaping 2:10 Absolute threshold of hearing 3:54 Simple noise shaping algorithm 5:25 Noise shaping schematics 7:16 POW-R 9:34 Story on analog dither Tools used: Sonic Visualiser (waveform/spectrum analyzer) - https://www.sonicvisualiser.org/downl... Reaper (DAW) - https://www.reaper.fm/ References: Principles of Digital Audio by Ken C. Pohlmann Videos used in the outro:    • U.S. NAVY  BASIC MECHANISMS OF FIRE C...      • Flying Fortresses Bomb France (1942)   This video series explains the fundamentals of digital audio, how audio signals are expressed in the digital domain, how they're converted and transformed and the advantages of working with digital signals. Find the full playlist here:    • Digital Audio Fundamentals   If you've got any questions, suggestions or recommendations, type them out here, or send me a message on any of my social channels mentioned below. A lot of time was spent on creating this series, and I plan to do more. So please consider subscribing if you wish to be notified about more releases in the future. And if you feel generous:   / akashmurthy   Check out the audio track in the intro and outro here:   / tinderbox   Check out my music here: https://farfetchd-official.bandcamp.com/ Give me a shout here: Facebook -   / akash.murthy.319   Instagram -   / thrifleganger