A rectangular group of screen pixels. In the digital video world, the data are compressed in blocks of pixels to reduce transmission bandwidth and decompressed for display. When the incoming ...

A distortion that appears in compressed video material as abnormally large pixel blocks. Also called "macroblocking," it occurs when the encoder cannot keep up with the allocated bandwidth.

JPEG images use a technique called DCT encoding to split an image into 8x8 pixel blocks before removing colours that appear infrequently. This leads to the storage of less colours but is often ...