Texas Instruments Corporation

Samsung Electronics Co., Ltd.

Madhukar Budagavi

Vivienne Sze

Do-Kyoung Kwon

Minhua Zhou

Rajan Laxman Joshi

Hossein Najaf-Zadeh

Mehmet Umut Demircin

Esmaeil Faramarzi

Woo-Shik Kim

Akira Osamoto

Indranil Sinharoy

Youngkwon Lim

Mangesh Devidas Sadafale

Ming-Jun Chen

Ankur Saxena

Ying Chen

Hyung Joon Kim

Ajit Deepak Gupte

Neha Dawar

Yasutomo Matsuba

Tuan Ho

Imed Bouazizi

Veeramanikandan Raju

Goksel Dedeoglu

Andrew Joseph Dickerson

Felix Carlos Fernandes

Sungryeul Rhyu

Rajendra K Talluri

Abhishek Sehgal

Nishith D Tripathi

Saifeng Ni

Ravindranath Kanamangala

John Furton

Guoxin Jin

Jeffrey Wilkinson

Wendi B Heinzelman

A method for decoding an encoded video bit stream in a video decoder is provided that includes decoding an intra prediction mode for a block of pixels encoded in the video bit stream, determining, based on the intra prediction mode, whether or not a smoothing filter is to be applied to reference pixel values used for intra prediction of the block, applying a smoothing filter to the reference pixel values when a result of the determining is that a smoothing filter is to be applied, and performing intra prediction according to the intra prediction mode using the smoothed reference pixel values to generate a predicted block of pixels.

Mode adaptive intra prediction smoothing in video coding

An apparatus includes a communication interface configured to receive a bitstream for a compressed video and a processor operably coupled to the communication interface. The processor is configured to decode the bitstream for the compressed video. The processor is also configured to identify a mapping of view numbers of a plurality of images and a plurality of subpicture identifiers, each of the plurality of subpicture identifiers associated with a defined location in a video frame, wherein the mapping is signaled in the bitstream, and wherein each one of the view numbers is assigned to one image of the plurality of images based on a corresponding one of a plurality of camera viewpoints of a scene. The processor is also configured to instruct a display of at least one image based on at least one of the plurality of images.

Signaling of multiview tiled volumetric video

An apparatus comprises a communication interface and a processor operably coupled to the communication interface. The communication interface is configured to receive a compressed bitstream including association information between scene objects and submeshes. The processor is configured to determine an index of a scene object, decode the association information between scene objects and submeshes, determine an identifier of a submesh based on the association information and the index of the scene object, and reconstruct the submesh based on the identifier.

Submesh coding for dynamic mesh coding

An apparatus includes a communication interface and a processor operably coupled to the communication interface. The processor is configured to form an LOD signal corresponding to a displacement field. The processor is further configured to identify one or more samples of the LOD signal. The processor is further configured to determine whether a set of values of the one or more samples has a positive skew or a negative skew and set a skew flag. The processor is further configured to convert the set of values to a set of unsigned symbols according to the determined positive skew or negative skew. The processor is further configured to perform binarization on the converted set of values. The processor is further configured to produce an output bitstream including encoding the LOD signal using the converted and binarized set of values and encoding the skew flag in the output bitstream.

Coding of displacements using skew flag for vertex mesh (V-MESH)

A method for encoding a video sequence in a video encoder is provided that includes adapting a quantization parameter of a block of pixels in a picture of the video sequence based on a transform block size of the block of pixels to determine a final quantization parameter, and quantizing transform coefficients of the block of pixels using the final quantization parameter.

Block artifact suppression in video coding

An apparatus for three dimensional (3D) art viewing includes one or more sensors and a processor operably coupled to the one or more sensors. The processor is configured to detect, using the one or more sensors, a position of a user. The processor is additionally configured to output, for display, an aspect of an image based on the position of the user. The processor is also configured to obtain, using the one or more sensors, movement data associated with a movement of the user. The processor is further configured to apply temporal smoothing to smooth the movement data. In addition, the processor is configured to map the smoothed movement data to a series of view indices. The processor is also configured to change the aspect of the image for display based on the mapped series of view indices.

3D arts viewing on display devices

Techniques for context-adaptive binary arithmetic coding (CABAC) coding with a reduced number of context coded and/or bypass coded bins are provided. Rather than using only truncated unary binarization for the syntax element representing the delta quantization parameter and context coding all of the resulting bins as in the prior art, a different binarization is used and only part of the resulting bins are context coded, thus reducing the worst case number of context coded bins for this syntax element. Further, binarization techniques for the syntax element representing the remaining actual value of a transform coefficient are provided that restrict the maximum codeword length of this syntax element to 32 bits or less, thus reducing the number of bypass coded bins for this syntax element over the prior art.

Reducing context coded and bypass coded bins to improve context adaptive binary arithmetic coding (CABAC) throughput

A method for encoding video data is provided that includes determining whether or not a parent coding unit of a coding unit of the video data was predicted in intra-prediction block copy (IntraBC) mode and, when it is determined that the parent coding unit was not predicted in IntraBC mode: computing activity of the coding unit, determining an IntraBC coding cost of the coding unit by computing the IntraBC coding cost of the coding unit using a two dimensional (2D) search when the activity of the coding unit is not than an activity threshold, and computing the IntraBC coding cost of the coding unit using a one dimensional (1D) search when the activity of the coding unit is less than the activity threshold, using the IntraBC coding cost to select an encoding mode from one of a plurality of encoding modes, encoding the coding unit using the selected encoding mode.

Intra block copy (IntraBC) cost estimation

A method is provided that includes receiving a coded largest coding unit in a video decoder, wherein the coded largest coding unit includes a coded coding unit structure and a plurality of coded quantization parameters, and decoding the coded largest coding unit based on the coded coding unit structure and the plurality of coded quantization parameters.

Coding unit quantization parameters in video coding

A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream in the scalable bitstream, and signaling an indication of a highest temporal level of the first sub-bitstream comprising at least one of the reference portions in the scalable bitstream.

Hierarchical inter-layer prediction in multi-loop scalable video coding

A method and apparatus for encoding bit code utilizing context dependency simplification to reduce dependent scans. The method includes retrieving at least one 2 dimensional array of transform coefficient, transforming the at least one 2 dimensional array of transform coefficient to a 1 dimensional coefficient scanning using a diagonal scan in a fixed direction, utilizing the at least one 1 dimensional array of transform coefficients for context selection based on fewer than 11 neighbors, potentially selected based on scan direction, slice type, coding unit type and binarization, and performing arithmetic coding to generate coded bit utilizing context selection and binarization.

Method and apparatus for diagonal scan and simplified context selection for parallel entropy coding of significance map of transform coefficients

A method of entropy coding in a video encoder is provided that includes assigning a first bin to a first single-probability bin encoder based on a probability state of the first bin, wherein the first single-probability bin encoder performs binary arithmetic coding based on a first fixed probability state, assigning a second bin to a second single-probability bin encoder based on a probability state of the second bin, wherein the second single-probability bin encoder performs binary arithmetic coding based on a second fixed probability state different from the first fixed probability state, and coding the first bin in the first single-probability bin encoder and the second bin in the second single-probability bin encoder in parallel, wherein the first single-probability bin encoder uses a first rLPS table for the first fixed probability state and the second single-probability bin encoder uses a second rLPS table for the second fixed probability state.

Simplified binary arithmetic coding engine

An electronic device, a client device, and a method for split rendering video content are disclosed. The method includes receiving user data including viewpoint and motion data associated with a client device. The method also includes identifying a first portion of the video content corresponding to a field of view (FoV) of the client device based on the viewpoint. The method further includes identifying speed and direction of the client device based on the motion data. Additionally, the method includes identifying, based on the speed and the direction, a second portion of the video content extending from the first portion of the video content and expanding the FoV. The method also includes scaling the second portion of the video content using a scaling factor that is determined based on the speed. The method further includes transmitting the first and second portions of the video content and the scaling factor.

Extended field of view generation for split-rendering for virtual reality streaming

A method for decoding an encoded video bit stream in a video decoder is provided that includes determining a scan pattern type for a transform block to be decoded, decoding a column position X and a row position Y of a last non-zero coefficient in the transform block from the encoded video bit stream, selecting a column-row inverse transform order when the scan pattern type is a first type, selecting a row-column inverse transform order when the scan pattern type is a second type, and performing one dimensional (1D) inverse discrete cosine transformation (IDCT) computations according to the selected transform order to inversely transform the transform block to generate a residual block.

Inverse transformation using pruning for video coding

A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder is provided that includes determining SAO parameters for largest coding units (LCUs) of a reconstructed picture, wherein the SAO parameters include an indicator of an SAO filter type and a plurality of SAO offsets, applying SAO filtering to the reconstructed picture according to the SAO parameters, and entropy encoding LCU specific SAO information for each LCU of the reconstructed picture in an encoded video bit stream, wherein the entropy encoded LCU specific SAO information for the LCUs is interleaved with entropy encoded data for the LCUs in the encoded video bit stream. Determining SAO parameters may include determining the LCU specific SAO information to be entropy encoded for each LCU according to an SAO prediction protocol.

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Plano, TX, United States of America

Madhukar Budagavi