Context-adaptive binary arithmetic coding (CABAC) is a form of entropy encoding used in H.264/MPEG-4 AVC video encoding. It is also used in the draft of the upcoming High Efficiency Video Coding (HEVC) video coding standard. It is a lossless compression technique. It is notable for providing much better compression than most other entropy encoding algorithms used in video encoding, and is one of the primary advantages of the H.264/AVC encoding scheme. CABAC is only supported in Main and higher profiles and requires a large amount of processing to decode compared to similar algorithms. It is also difficult to parallelize and vectorize. As a result, Context-adaptive variable-length coding (CAVLC), a lower efficiency entropy encoding scheme, is used to increase performance on slower playback devices.
Read more about Context-adaptive Binary Arithmetic Coding: Algorithm, Example, The Arithmetic Decoding Engine
Famous quotes containing the word arithmetic:
“Under the dominion of an idea, which possesses the minds of multitudes, as civil freedom, or the religious sentiment, the power of persons are no longer subjects of calculation. A nation of men unanimously bent on freedom, or conquest, can easily confound the arithmetic of statists, and achieve extravagant actions, out of all proportion to their means; as, the Greeks, the Saracens, the Swiss, the Americans, and the French have done.”
—Ralph Waldo Emerson (1803–1882)