Ge Video Compression, LLC

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

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

Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Dolby Video Compression, LLC

Vidyo, Inc.

Thomson Licensing

Koninklijke Philips Corporation N.v.

Thomas Wiegand

Detlev Marpe

Heiko Schwarz

Heiner Kirchhoffer

Philipp Helle

Benjamin Bross

Thomas Schierl

Cornelius Hellge

Robert Philipp Skupin

Yago Sánchez De La Fuente

Tung Nguyen

Martin Winken

Mischa Siekmann

Jan Stegemann

Philipp Merkle

Christian Bartnik

Valeri George

Simon Oudin

Karsten Mueller

Tobias Hinz

Gerhard Tech

Haricharan Lakshman

Matthias Preiss

Karsten Sühring

Jonathan Pfaff

Karsten Suehring

Phan Hoang Tung Nguyen

Karsten Grueneberg

Adam Wieckowski

Sebastian Bosse

Ali Atef Ibrahim Khairat Abdelhamid

Dimitri Podborski

Jackie Ma

Jens Brandenburg

Björn Stallenberger

Detlef Marpe

Santiago De Luxán Hernández

Alexandros Eleftheriadis

Ofer Shapiro

Paul Haase

Christian Helmrich

Danny Hong

Michael Schäfer

Christian Rudat

Paul Keydel

Christian Lehmann

Thomas Haustein

Thomas Fehrenbach

Hunn Rhee

Yago Sanchez De La Fuente

Roman Rischke

Bjoern Stallenberger

Gayathri Venugopal

Heribert Brust

Thomas Wirth

Eiko Seidel

Lars Thiele

Anastasia Henkel

Robin Rajan Thomas

Yago Sánchez

Wojciech Samek

Michael Schaefer

Stephan Kaltenstadler

Baris Goektepe

Dan Grois

Baris Göktepe

Karsten Grüneberg

Serhan Gül

Aljoscha Smolic

Stefan Matlage

Johannes Erfurt

Lim Wang-Q

Simone Walter

Karsten Müller

Ivan Zupancic

Michael Schafer

Yago Sanchez

Peter Kauff

Klaus-Robert Mueller

Jacob Chakareski

David Gómez-Barquero

Patrick Ndjiki-Nya

Georg Maier

Dominique Maniry

Brad Schumitsch

Bela Makai

Matthias Kautzer

Klaus-Robert Müller

Soenke Schmidt

Soeren Becker

Wang-Q Lim

Jennifer Rasch

Remco C Veltkamp

Heiner Kirchhoffeer

Gitta Kutyniok

Philipp Merkel

Dimitar Doshkov

Tung Hoang Nguyen

Karsten Gruneberg

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.

Encoding and decoding a picture

Interpolation between explicitly signaled CPB (or HRD) parameters at selected bit rates is used to achieve a good compromise between CPB parameter transmission capacity and CPB parametrization effectiveness and may be, particularly, made in an effective manner.

Video coding using a coded picture buffer

To increase efficiency of a bit-depth scalable data-stream an inter-layer prediction is obtained by mapping samples of the representation of the picture or video source data with a first picture sample bit-depth from a first dynamic range corresponding to the first picture sample bit-depth to a second dynamic range greater than the first dynamic range and corresponding to a second picture sample bit-depth being higher than the first picture sample bit-depth by use of one or more global mapping functions being constant within the picture or video source data or varying at a first granularity, and a local mapping function locally modifying the one or more global mapping functions and varying at a second granularity smaller than the first granularity, with forming the quality-scalable data-stream based on the local mapping function such that the local mapping function is derivable from the quality-scalable data-stream.

Bit-depth scalability

The usual coding order according to which the reference view is coded prior to the dependent view, and within each view, a depth map is coded subsequent to the respective picture, may be maintained and does lead to a sacrifice of efficiency in performing inter-view redundancy removal by, for example, predicting motion data of the current picture of the dependent view from motion data of the current picture of the reference view. Rather, a depth map estimate of the current picture of the dependent view is obtained by warping the depth map of the current picture of the reference view into the dependent view, thereby enabling various methods of inter-view redundancy reduction more efficiently by bridging the gap between the views. According to another aspect, the following discovery is exploited: the overhead associated with an enlarged list of motion predictor candidates for a block of a picture of a dependent view is comparatively low compared to a gain in motion vector prediction quality resulting from an adding of a motion vector candidate which is determined from an, in disparity-compensated sense, co-located block of a reference view.

Efficient multi-view coding using depth-map estimate for a dependent view

Concepts for predictive picture coding using template matching are presented which may, for a given computation complexity, result in an increased coding efficiency.

Predictive coding concept using template matching

The invention provides an interrogator for obtaining information associated with a caller identification, such as a telephone number, transmitted within an incoming telephone call including: a receiving device configured to receive the incoming telephone call and to extract the caller identification from the incoming telephone call; an interrogating device configured to receive the extracted caller identification from the receiving device and to interrogate information associated with the caller identification from an external data base, which is configured to operate independently from the user voice communication device for which the incoming telephone call is intended for; and a forwarding device configured to receive and to forward the interrogated information.

Automatic caller identification translation

A concept for transmitting information from a client to a server is described, the client being for streaming visual content from the server and for integrating the visual content into a 3D scene of a user application, and the client being for obtaining a rendered view of the 3D scene.

Client-server communication for streaming of visual content

Block-based coding of a picture is rendered more effective by providing an intra-prediction coding concept according to which a certain block of the picture is intra-prediction coded using a certain intra-coding mode by partitioning the predetermined block into partitions along a certain dimension with the number of partitions being greater than two and/or the partitions being one sample wide along the certain dimension with the partitions being, for reconstruction purposes, sequentially subject to spatial prediction using the intra-prediction coding mode signaled for the certain block followed by correcting the thus obtained predictor using a prediction residual so that for preceding partitions a reconstruction of the samples is available to the decoder at the time of processing the next, then current, partition. Signaling overhead with respect to the partitioning may be left off or may be kept low.

Partition-based intra-coding concept

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.

Video coding concept allowing for limitation of drift

A video decoder is configured to decode a plurality of video frames which are subdivided into a set of one or more slices. The decoder evaluates slice type information indicating whether a slice is encoded using an independent coding mode having no prediction of video content of a current frame on the basis of a video content of a previous frame, or using a single-predictive mode having a prediction of a block of pixels on the basis of one block of pixels of a previous frame, or using a bi-predictive mode having a prediction of a block of pixels on the basis of two or more blocks of pixels of one or more previous frames, to select a mode of operation for decoding a slice.

Video decoder, video encoder, method for decoding a video content, method for encoding a video content, computer program and video bitstream

A video decoder for decoding a video from a data stream using block-based predictive decoding is arranged to derive, using inter prediction, a first prediction, p, for a current block, derive, using intra prediction, a second prediction, p, for the current block determine a scalar weighting parameter, α, based at least in part on a look up table using prediction parameter information of blocks neighboring the current block, determine a prediction signal, q, for the current block as a weighted sum, of the first prediction, p, and the second prediction, p, using, at least in part, the scalar weighting parameter, α, and decode the current block using the prediction signal, q.

Composed prediction and restricted merge

A picture in a data stream is subdivided into different size transform bocks. For a transform block, a transformation is selected by checking whether the block's size exceeds a threshold. If it does, a default technique is used to select the transformation. If it does not, a transformation is used from a list of transformations as identified by an index, the list including an identity transformation and non-identity transformations. A coefficients block in the data stream is decoded, and if the selected transformation is the identity transformation, then the coefficients block is used as a residual sample array, and if the selected transformation is not the identity transformation, the coefficients block is subjected to an inverse transformation corresponding to the selected transformation to obtain a residual sample array used to correct a prediction for the transform block.

Unified transform type signaling and transform type dependent transform coefficient level coding

An encoding scheme for encoding a sequence of integer values comprises encoding a value at a predetermined position and then consecutively calculating and encoding differences between neighboring values. A respective decoding scheme is also provided. These encoding and decoding schemes provide a more efficient encoding concept.

Apparatuses for encoding and decoding a sequence of integer values, methods for encoding and decoding a sequence of integer values and computer program for implementing these methods

A video data stream is rendered reducible in a manner so that the reduction leads to a restriction of pictures of the reduced video data stream to merely a predetermined subarea of the pictures of the original video data stream and in a manner so that transcoding, such as re-quantization, may be avoided and a conformance of the reduced video data stream relative to the codec underlying the original video data stream be maintained. This is achieved by providing the video data stream with information including an indication of the predetermined subarea and replacement indices for redirecting the indices included by the payload portion so as to refer to, and/or replacement parameters for adjusting the first set of coding parameter settings so as to result in, a second set of coding parameter settings.

Concept for picture/video data streams allowing efficient reducibility or efficient random access

An apparatus includes an encoder, which receives image or video data, encodes the data and provides a bitstream. The encoder includes a CABAC encoder, which receives a binary valued syntax element associated with a block of the data to be encoded, and encodes, using a selected context model, the syntax element into coded bits for the bitstream. The syntax element includes a tool flag indicating whether or not certain coding tool is employed when encoding a block of the data. For a block of the data which exhibits an aspect ratio larger than 2 and for a block of the data which exhibits an aspect ratio less than or equal to 2, and to which blocks the certain coding tool is applicable, first and second context models for encoding the tool flag are selected from a group of one or more first and second context models, respectively.

Use-case driven context model selection for hybrid video coding tools

Growing community of inventors

Berlin, Germany

Thomas Wiegand