Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Johannes Erfurt

Thomas Wiegand

Detlev Marpe

Heiko Schwarz

Mischa Siekmann

Christian Helmrich

Sebastian Bosse

Lim Wang-Q

Soeren Becker

Wang-Q Lim

An apparatus for determining visual activity information for a predetermined picture block of a video sequence including a plurality of video frames, the plurality of video frames including a current video frame and one or more timely-preceding video frames, wherein the one or more timely-preceding video frames precede the current video frame in time, is provided. The apparatus is configured to receive the predetermined picture block of each of the one or more timely-preceding video frames and the predetermined picture block of the current video frame. Moreover, the apparatus is configured to determine the visual activity information depending on the predetermined picture block of the current video frame and depending on the predetermined picture block of each of the one or more timely-preceding video frames and depending on a temporal high-pass filter.

Apparatus and method for improved video quality assessment

A decoder is described, which receives an encoded data stream. The encoded data stream includes data representing a picture and a classification mode parameter. The classification mode parameter specifies a certain classification to be applied to samples in the picture, the certain classification selected from a plurality of classifications. The decoder decodes the encoded data stream to obtain a reconstructed picture and the classification mode parameter, classifies samples of the reconstructed picture into one of a plurality of classes using the certain classification specified by the classification mode parameter, and filters the samples of the reconstructed picture. A sample is filtered using a filter for the class into which the sample has been classified.

Adaptive in-loop filter with multiple feature-based classifications

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Berlin, Germany

Johannes Erfurt