In sound processing, the mel-frequency cepstrum (MFC) is a representation of the short-term power spectrum of a sound, based on a linear cosine transform of a log power spectrum on a nonlinear mel scale of frequency. Mel-frequency cepstral coefficients (MFCCs) are coefficients that collectively make up an MFC. They are derived from a type of cepstral representation of the audio clip (a nonlinear "spectrum-of-a-spectrum"). The difference between the cepstrum and the mel-frequency cepstrum is that in the MFC, the frequency bands are equally spaced on the mel scale, which approximates the human auditory system's response more closely than the linearly-spaced frequency bands used in the normal spectrum. This frequency warping can allow for better representation of sound, for example, in audio compression that might potentially reduce the transmission bandwidth and the storage requirements of audio signals. MFCCs are commonly derived as follows: 1. * Take the Fourier transform of (a windowed excerpt of) a signal. 2. * Map the powers of the spectrum obtained above onto the mel scale, using triangular overlapping windows or alternatively, cosine overlapping windows. 3. * Take the logs of the powers at each of the mel frequencies. 4. * Take the discrete cosine transform of the list of mel log powers, as if it were a signal. 5. * The MFCCs are the amplitudes of the resulting spectrum. There can be variations on this process, for example: differences in the shape or spacing of the windows used to map the scale, or addition of dynamics features such as "delta" and "delta-delta" (first- and second-order frame-to-frame difference) coefficients. The European Telecommunications Standards Institute in the early 2000s defined a standardised MFCC algorithm to be used in mobile phones. (Wikipedia).
EEVblog #423 - HP5061A Atomic Clock Cesium Beam Frequency Standard
A look at one of the original HP 5061A Cesium Beam atomic clock frequency standards used in the "flying clocks" experiment in the 1960's, that showed (not definitely at the time) that time dilation as part of Einstein's relatively theory was correct. The effect was not confirmed until a mo
From playlist Calibration & Standards
Review: CEM DT-337 milliamp clamp meter
------------------------------ Click "Show more" ------------------------------------------- A review of the CEM DT-337 milliamp clamp meter with a comparison to the GTC CM100 milliamp clamp meter. Buy the GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter: http://astore.amazon.com/m
From playlist Multimeter reviews, buyers guide and comparisons.
Physics 50 E&M Radiation (2 of 33) Frequency and Wavelength
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain electromagnetic radiation in terms of frequency and wavelength. Next video in series: http://youtu.be/t6EnTtkG4hA
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Physics 50 E&M Radiation (4 of 33) Frequency of E&M Radiation and Temperature
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the relationship of an object (and it's temperature) and the kinds of E&M radiation emitted from the object. Next video in series: http://youtu.be/SCMK0UJH1p4
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Multimeter Calibration - Some future testing..
A list of my multimeters can be purchased here: http://astore.amazon.com/m0711-20?_encoding=UTF8&node=5 The calibration of my Major Tech MT22 raised some interesting responses so we'll take this topic a little further. I have ordered a DMMCheck and PentaRef from Voltagestandard.com.
From playlist Multimeter reviews, buyers guide and comparisons.
NIPS 2011 Music and Machine Learning Workshop: Multi-Timescale Principal Mel Spectral Components..
International Music and Machine Learning Workshop: Learning from Musical Structure at NIPS 2011 Invited Talk: Multi-Timescale Principal Mel Spectral Components for Automatic Annotation of Music Audio by Philippe Hamel Philippe Hamel ia a Ph.D student in computer science at the Unive
From playlist NIPS 2011 Music and Machine Learning Workshop
Tacotron 2 - THE BEST TEXT TO SPEECH AI YET!
In this video, I am going to talk about the new Tacotron 2- google's the text to speech system that is as close to human speech till date. If you like the video, SUBSCRIBE for more awesome content. Research paper: https://arxiv.org/pdf/1712.05884.pdf Read some of my AI answers on Quora:
From playlist Deep Learning Research Papers
Acoustic Cooling & How To Manipulate Heat With Sound (Thermoacoustics Part 2)
In this video we explore another facet of thermoacoustics: heat pumps and refrigeration. Check out my sponsor MEL Science and use the promo code "nighthawk" for 25% off the first month: http://bit.ly/MELScienceNHiL Resources for further study: Blade Attila's excellent thermoacoustic/heat
From playlist Acoustics & Sound
Sound play with Convolution Neural Networks
In this video, I talk about processing audio using a convolutional Neural Network and discriminate environmental sounds. Code: https://github.com/ajhalthor/audio-classifier-convNet Convolution Neural Networks: https://www.youtube.com/watch?v=m8pOnJxOcqY Generative Adversarial Networks: ht
From playlist Deep Learning Research Papers
GCSE Maths AQA June 2019 Paper 2 Higher Tier Walkthrough
A complete walk through of AQA GCSE Maths June 2019 Higher Tier - Paper 2 calculator. Help revise for the 8300 new specification 9-1 mathematics exams and your mock. This walkthrough tutorial has full solutions to each question, so you can use it like a mark scheme. Choose to watch th
From playlist AQA GCSE Maths Practice Papers - All Paper Sets
EEVblog #456 - CSIRO Rubidium Frequency Standard
Dave uses his CSIRO National Measurement Institute rubidium frequency standard to calibrate and adjust his Agilent 53131A frequency counter. With bonus teardowns. Agilent 53131A Schematics: http://cp.literature.agilent.com/litweb/pdf/5989-6307EN.pdf http://www.thinksrs.com/products/PRS10.h
From playlist Calibration & Standards
OpenAI Whisper: Robust Speech Recognition via Large-Scale Weak Supervision | Paper and Code
โค๏ธ Become The AI Epiphany Patreon โค๏ธ https://www.patreon.com/theaiepiphany ๐จโ๐ฉโ๐งโ๐ฆ Join our Discord community ๐จโ๐ฉโ๐งโ๐ฆ https://discord.gg/peBrCpheKE In this video I cover Whisper, an ASR system from OpenAI's "Robust Speech Recognition via Large-Scale Weak Supervision" paper. Trained on a
From playlist Transformers
Multimeter Reference Check #1 - Effect of temperature coefficent
I test the effect of temperature on my voltage and resistance references for my precision multimeter reference check project. --------------------- Click "Show more" ------------------------------- My website and forum:- http://www.mjlorton.com Donations and contributions:- http://www.mjlo
From playlist General Electronics
ML4Audio - HuBERT paper discussion
In this session of the ML 4 Audio Study group, we discussed about HuBERT. You can find the slides in https://github.com/Vaibhavs10/ml-with-audio/blob/master/slides/ml-4-audio-paper-reading-2-hubert.pdf. Join this group and future discussions at http://hf.co/join/discord
From playlist Machine Learning for Audio
Solar Powered Kindle / eReader #1: Inital circuit with Schmitt Trigger using 555 timer
I use a 555 timer IC as a Schimitt trigger to create the hysteresis I need for the solar powered Amazon Kindle project. --------------------- Click "Show more" ------------------------------- My website and forum:- http://www.mjlorton.com Donations and contributions:- http://www.mjlorton.c
From playlist Solar Powered Projects
Laser Microscope Made With a Drop of Water
Checkout Mel Science boxes here! https://melscience.com/s1x/ Use code 'ACTIONLAB' for 50% off your first month I make a microscope out of a laser and a drop of water. My Youtube shorts channel: https://www.youtube.com/channel/UCA19mAJURyYHbJzhfpqhpCA Get Your Experiment Box Here: http
From playlist Science is awesome!
Probability & Relative Frequency GCSE Maths Exam Questions
GCSE maths past paper exam questions on probability and relative frequency, suitable for higher and foundation GCSE and IGCSE maths revision! In probability, relative frequency is just the number of times an event occurs, out of the total number of trials. Relative frequency can be used
From playlist Foundation GCSE Maths Past Paper Exam Questions
T4D #35 - Watt Meter, Amprobe AM-160-A DMM and News
SkyRC Watt Meter, Amprobe AM-160-A DMM and News My Techie Amazon Store: http://astore.amazon.com/m0711-20 --------------------- Click "Show more" ------------------------------- My website and forum:- http://www.mjlorton.com Donations and contributions:- http://www.mjlorton.com My techie c
From playlist Tip or Thought for the Day!
Rubidium Frequency Standard Buyers Guide - High Accuracy Clock Project
Visit my website - http://www.mjlorton.com/ PCBWay SMT Service only $30 with Quick Turnaround Time https://www.pcbway.com/ ------------------------------ Click "Show more" ------------------------------------------- In this video I provide some guidance and tips to buying a Rubidium Freq
From playlist High Accuracy Clock Project
NOVEMBER 2017 OFFICIAL Edexcel 9-1 Paper 3 GCSE Maths Higher calculator Paper 3 FULL walkthrough
exam paper - http://bit.ly/2RQ6C6w mark scheme - http://bit.ly/2tbgLAw In this video I go through all of the questions in the Edexcel Maths GCSE exam higher paper 3 sat on the 8th of November 2017. This exam was a resit for students who did not pass or wanted to improve results from the
From playlist November 2017 Maths GCSEs