Abstract: A picture of a sequence of pictures is decoded by deriving partitioning information from the data stream, subdividing the picture into coding blocks according to the partitioning information, and decoding the picture in units of the coding blocks. Filtering information is derived from the data stream, which indicates a subdivision of the picture into filtering blocks. The subdivision into filtering blocks is used for filtering the picture.

Abstract: A video encoder according to embodiments is provided. The video encoder is configured for encoding a plurality of pictures of a video by generating an encoded video signal, wherein each of the plurality of pictures includes original picture data. The video encoder includes a data encoder configured for generating the encoded video signal including encoded picture data, wherein the data encoder is configured to encode the plurality of pictures of the video into the encoded picture data. Moreover, the video encoder includes an output interface configured for outputting the encoded picture data of each of the plurality of pictures. Furthermore, a video decoders, systems, methods for encoding and decoding, computer programs and encoded video signals according to embodiments are provided.

Abstract: The present invention concerns an apparatus configured to partition a picture into leaf blocks using recursive multi-tree partitioning, block-based encode the picture into a data stream using the partitioning of the picture into the leaf blocks, wherein the apparatus is configured to, in partitioning the picture into the leaf blocks, for a predetermined block which extends beyond a boundary of the picture, reduce an available set of split modes depending on a position at which the boundary of the picture crosses the predetermined block in order to obtain a reduced set of one or more split modes, wherein the apparatus is configured to signal a selected split mode in the data stream.

Abstract: A video encoder according to embodiments is provided. The video encoder is configured for encoding a plurality of pictures of a video by generating an encoded video signal, wherein each of the plurality of pictures includes original picture data. The video encoder includes a data encoder configured for generating the encoded video signal including encoded picture data, wherein the data encoder is configured to encode the plurality of pictures of the video into the encoded picture data. Moreover, the video encoder includes an output interface configured for outputting the encoded picture data of each of the plurality of pictures. Furthermore, a video decoders, systems, methods for encoding and decoding, computer programs and encoded video signals according to embodiments are provided.

Abstract: An apparatus for block-wise decoding a picture from a data stream and/or encoding a picture into a data stream, the apparatus supporting at least one intra-prediction mode according to which the intra-prediction signal for a block of a predetermined size of the picture is determined by applying a first template of samples which neighbours the current block onto a neural network. The apparatus may be configured, for a current block differing from the predetermined size, to: resample a second template of samples neighboring the current block, so as to conform with the first template so as to obtain a resampled template; apply the resampled template of samples onto the neural network so as to obtain a preliminary intra-prediction signal; and resample the preliminary intra-prediction signal so as to conform with the current block so as to obtain the intra-prediction signal for the current block.

Abstract: Video codec for supporting temporal inter-prediction, configured to perform padding of an area of a referenced portion of a reference picture which extends beyond a border of the reference picture, which referenced portion is referenced by an inter predicted block of a current picture by selecting one of a plurality of intra-prediction modes, and padding the area using the selected intra-prediction mode.

Abstract: A video decoder for decoding an encoded video signal including encoded picture data and indication data of a picture of a video to reconstruct the picture of the video is provided. The video decoder includes an interface configured for receiving the encoded video signal, and a data decoder configured for reconstructing the picture of the video by decoding the encoded picture data using the indication data. The picture is partitioned into a plurality of coding areas. One or more coding areas of the plurality of coding areas include two or more coding tree units of the plurality of coding tree units, wherein each coding area of the one or more coding areas which includes two or more coding tree units exhibits a coding order for the two or more coding tree units of the coding area.

Abstract: Concepts for applying intra-prediction in multi-component or color picture or video coding in a manner achieving a more efficient coding are described. A decoder for decoding a picture is configured to derive a color sampling format and a partitioning scheme from one more first syntax elements in a data stream. The decoder is configured to decode a first color component and a second color component. The decoder is configured to determine a second-color-component intra-prediction mode index from the data stream.

Abstract: The present invention concerns an apparatus configured to partition a picture into leaf blocks using recursive multi-tree partitioning, block-based encode the picture into a data stream using the partitioning of the picture into the leaf blocks, wherein the apparatus is configured to, in partitioning the picture into the leaf blocks, for a predetermined block which extends beyond a boundary of the picture, reduce an available set of split modes depending on a position at which the boundary of the picture crosses the predetermined block in order to obtain a reduced set of one or more split modes, wherein the apparatus is configured to signal a selected split mode in the data stream.

Abstract: An apparatus for block-wise decoding a picture from a data stream and/or encoding a picture into a data stream, the apparatus supporting at least one intra-prediction mode according to which the intra-prediction signal for a block of a predetermined size of the picture is determined by applying a first template of samples which neighbours the current block onto a neural network. The apparatus may be configured, for a current block differing from the predetermined size, to: resample a second template of samples neighboring the current block, so as to conform with the first template so as to obtain a resampled template; apply the resampled template of samples onto the neural network so as to obtain a preliminary intra-prediction signal; and resample the preliminary intra-prediction signal so as to conform with the current block so as to obtain the intra-prediction signal for the current block.

Abstract: Video codec for supporting temporal inter-prediction, configured to perform padding of an area of a referenced portion of a reference picture which extends beyond a border of the reference picture, which referenced portion is referenced by an inter predicted block of a current picture by selecting one of a plurality of intra-prediction modes, and padding the area using the selected intra-prediction mode.

Abstract: A video decoder for decoding an encoded video signal including encoded picture data and indication data of a picture of a video to reconstruct the picture of the video is provided. The video decoder includes an interface configured for receiving the encoded video signal, and a data decoder configured for reconstructing the picture of the video by decoding the encoded picture data using the indication data. The picture is partitioned into a plurality of coding areas. One or more coding areas of the plurality of coding areas include two or more coding tree units of the plurality of coding tree units, wherein each coding area of the one or more coding areas which includes two or more coding tree units exhibits a coding order for the two or more coding tree units of the coding area.

Abstract: An apparatus and method determine quantization parameter for a second rate-control pass of a video encoder for a group of pictures based on an encoding bitrate and further quantization parameter of a first rate-control pass of the video encoder for the group of pictures. The apparatus is configured to determine, for each of positions spatially distributed over frames of the group of pictures, a dissimilarity measure or a similarity measure of a comparison of a first frame portion at the respective position, and a second portion of a reference frame to which a motion vector of an estimated motion field at the respective position points. The apparatus is configured to form a representative scalar value based on the dissimilarity measures or similarity measures determined for the positions. The apparatus is further configured to determine a preliminary quantization parameter for the second rate-control pass based on the encoding bitrate.

Abstract: A video decoder for decoding a video from a data stream is configured to decode an indication from the data stream which is valid for a sequence of pictures of the video, and indicates that RASL pictures within the sequence of pictures are coded in a manner excluding a predetermined set of one or more coding tools.

Abstract: The present invention concerns an apparatus configured to partition a picture into leaf blocks using recursive multi-tree partitioning, block-based encode the picture into a data stream using the partitioning of the picture into the leaf blocks, wherein the apparatus is configured to, in partitioning the picture into the leaf blocks, for a predetermined block which extends beyond a boundary of the picture, reduce an available set of split modes depending on a position at which the boundary of the picture crosses the predetermined block in order to obtain a reduced set of one or more split modes, wherein the apparatus is configured to signal a selected split mode in the data stream.

Abstract: Apparatus for encoding a video having a sequence of frames using rate control, configured to determine a global quantization parameter for the sequence of frames based on a target bit-rate, and to perform a coding pass, coding the sequence of frames, using the global quantization parameter by determining a frame quantization parameter per frame of the sequence of frames on the basis of the global quantization parameter, and subjecting the sequence of frames to R/D optimizing encoding by using, for each frame, the frame quantization parameter determined for the respective frame so as to obtain an encoded version of an associated coding size for the respective frame.

Abstract: A video encoder is disclosed that is configured to encode a slice of a current picture into a data stream by partitioning the slice into rows of Coding Tree Units (CTUs), select a CTU dependency offset for the slice out of a plurality of CTU dependency offsets, the CTU dependency offset indicating a minimum CTU offset between consecutive CTU rows to be obeyed by a decoder when decoding CTU rows in parallel, and signal the CTU dependency offset in the data stream. The CTU dependency offset is selected based on a slice type of the slice.

Abstract: A video decoder for decoding an encoded video signal including encoded picture data and indication data of a picture of a video to reconstruct the picture of the video is provided. The video decoder includes an interface configured for receiving the encoded video signal, and a data decoder configured for reconstructing the picture of the video by decoding the encoded picture data using the indication data. The picture is partitioned into a plurality of coding areas. One or more coding areas of the plurality of coding areas include two or more coding tree units of the plurality of coding tree units, wherein each coding area of the one or more coding areas which includes two or more coding tree units exhibits a coding order for the two or more coding tree units of the coding area.

Abstract: The present invention concerns an apparatus configured to partition a picture into leaf blocks using recursive multi-tree partitioning, block-based encode the picture into a data stream using the partitioning of the picture into the leaf blocks, wherein the apparatus is configured to, in partitioning the picture into the leaf blocks, for a predetermined block which extends beyond a boundary of the picture, reduce an available set of split modes depending on a position at which the boundary of the picture crosses the predetermined block in order to obtain a reduced set of one or more split modes, wherein the apparatus is configured to signal a selected split mode in the data stream.

Abstract: An apparatus for decoding a picture is configured to partition the picture into coding blocks, using recursive multi-tree splitting. Splitting schemes for the multi-tree splitting are described. According to an embodiment, the decoder decodes a split direction flag from a data stream by context adaptive entropy decoding using a context which depends on whether, and discriminates between, a first number of criteria which would be fulfilled in case of a split direction indicated by the split direction flag being horizontal equals a second number of criteria which would be fulfilled in case of the split direction indicated by the split direction flag being vertical, the first number being greater than the second number, and the first number being smaller than the second number.