METHODS AND SYSTEMS FOR PREDICTION FILTERING IN VIDEO CODING

• Main Authors: FLYNN DAVID, HE DAKE
• Format: Patent
• Language: English
• Published: 10.07.2014

Methods of encoding and decoding video, in particular chroma components, using filtered predictions, are described. An intra or inter predicted block is first filtered before being used to determine residual data at the encoder or to reconstruct chroma data at the decoder. The filtering tends to be low-pass filtering, which removes high-frequency components from the prediction block. The encoder signals the use of the filter to the decoder by including a filtered-prediction flag for each coding unit, or other region within a picture, that has been subject to prediction filtering. The syntax may provide that only coding units above a threshold size have an associated filtered-prediction flag; smaller coding units are governed by a filtered-prediction flag sent in connection with a higher node in the coding tree block.