dct

1 free lesson tagged dct across Computer Science. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.

Computer Science

intermediate

Lossy Compression and the Rate-Distortion Tradeoff

Lossy compression is not lossless compression done badly. It is a deliberate trade of fidelity for rate, governed by a curve Shannon derived in 1959. This lesson covers rate-distortion theory, transform coding and the DCT, where JPEG actually discards information, perceptual coding in audio, motion compensation in video, and learned codecs.

11 steps·~17 min

Lossy Compression and the Rate-Distortion Tradeoff

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