Summary
Highlights
Introduction to Compression00:00:03
Files are often inefficiently stored; compression reduces file size by encoding data using fewer bits, which saves storage space and speeds up transmission.
Lossless Compression Techniques00:01:48
Lossless compression allows for perfect data reconstruction. Methods include Run-Length Encoding to replace repeating values and Huffman Coding, which uses frequency-based trees to assign compact, unique codes to data blocks.
Lossy Compression and Perceptual Coding00:06:23
Lossy compression discards data that is less perceptible to human senses, such as ultrasonic sound frequencies or subtle color variations in images, achieving significantly smaller file sizes.
Video Compression00:09:27
Video compression leverages temporal redundancy, identifying identical background pixels or moving objects across frames to encode only necessary differences, allowing for efficient streaming.