Introduction
Laymen explanation
Technical explanation
Approaches
Dimensionality reduction techniques can be used for feature extraction. For example, a car’s mileage may be very correlated with its age, so the dimensionality reduction algorithm will merge them into one feature that rep‐ resents the car’s wear and tear.
Audio feature extraction
https://www.youtube.com/watch?v=q-a5zz8UrP4??
Video feature extraction
https://www.youtube.com/watch?v=q-a5zz8UrP4??
Reference
https://www.amazon.in/Hands-Machine-Learning-Scikit-Learn-TensorFlow/dp/1491962291