Thomson Licensing

Interdigital Vc Holdings, Inc.

Vid Scale, Inc.

Thomson Licensing Dtv

Interdigital Madison Patent Holdings

Hua Yang

Yuwen He

Jiancong Luo

Wei Chen

Jill MacDonald Boyce

Xiaoyu Xiu

Alan Jay Stein

Joan Llach

Rahul Vanam

Gad Moshe Berger

Richard Edwin Goedeken

Xiaohui Wei

Adarsh Golikeri

Hongyu Li

Tao Liu

A filter may be applied to a subset of components associated with a sample in a coding block. The output of the filter may be used to modify values for other component(s). For example, a filter may be applied to a selected (for example, dominant) component(s). The output of the filter may be used to modify a value for one of the other components (for example, non-dominant components). The output of the filter may be used, for example, after a weighting factor is applied to the filter output, to modify a value for another one of the other components. A joint refinement signal may be obtained, for example, as the filtered output signal minus the filter input signal of the selected component(s). A properly weighted version of the joint refinement signal may be applied to modify the other components.

Joint component video frame filtering

An apparatus may be configured to determine a reference picture listed in a first reference picture list and a reference picture listed in a second reference picture list, for a coding block. The apparatus may be configured to determine whether to perform bi-directional optical flow (BDOF) for the coding block based at least in part on whether a distance between a picture associated with the coding block and the reference picture listed in the first reference picture list differs from a distance between the picture associated with the coding block and the reference picture listed in the second reference picture list. The apparatus may be configured to decode the coding block based on the determination of whether to perform BDOF for the coding block.

Switching logic for bi-directional optical flow

Intra sub-partitions (ISP) may be enabled for a current block, for example, based on an ISP indication. The block may be partitioned into multiple sub-partitions, and a sub-partition may belong to a prediction unit (PU). A sub-partition width for the current block and a minimum prediction block width may be obtained. A PU corresponding to a current sub-partition may be determined based on the sub-partition width and the minimum prediction block width. For example, when the sub-partition width is less than the minimum prediction block width, the PU may include multiple sub-partitions. In examples, the minimum prediction block width may be four samples. Reference samples may be determined, and the PU may be predicted using the reference samples.

Intra sub-partitions in video coding

Systems, methods, and instrumentalities may be used for decoding and/or encoding a coding unit (CD), An intra-prediction mode for a CD may be determined. A split mode may be determined based on the intra-prediction mode, to generate a plurality of sub-partitions in the CU. A prediction for a first sub-partition of the plurality of sub-partitions in the CU may be based on a reference sample in a second sub-partition of the plurality of sub-partitions in the CU. The CU may be decoded and/or encoded, for example, based on the determined split mode.

Intra sub-partitions related intra coding

Bidirectional optical flow (BDOF) may be bypassed, for a current coding block, based on whether symmetric motion vector difference (SMVD) is used in motion vector coding for the current coding block. A coding device (e.g., an encoder or a decoder) may determine whether to bypass BDOF for the current coding block based at least in part on an SMVD indication for the current coding block. The coding device may obtain the SMVD indication that indicates whether SMVD is used in motion vector coding for the current coding block. If SMVD indication indicates that SMVD is used in the motion vector coding for the current coding block, the coding device may bypass BDOF for the current coding block. The coding device may reconstruct the current coding block without performing BDOF if it determines to bypass BDOF for the current coding block.

Symmetric motion vector difference coding

Systems, devices, and methods are described herein for symmetric merge mode motion vector coding. Symmetric bi-prediction (bi-pred) motion vectors (MVs) may be constructed from available candidates in a merge candidate list for regular inter prediction merge mode and/or affine prediction merge mode. Available MV merge candidates may be symmetrically extended or mapped in either direction (e.g., between reference pictures before and after a current picture), for example, when coding a picture that allows bi-directional motion compensation prediction (MCP). A symmetric bi-pred merge candidate may be selected among merge candidates for predicting the motion information of a current prediction unit (PU). The symmetric mapping construction may be repeated by a decoder (e.g., based on a coded index of the MV merge candidate list), for example, to obtain the same merge candidates and coded MV at an encoder.

Symmetric merge mode motion vector coding

Bi-directional optical flow (BDOF) may be bypassed, for a current coding block, based on whether symmetric motion vector difference (8MVD) is used in motion vector coding for the current coding block, A coding device (e.g., an encoder or a decoder) may determine whether to bypass BDOF for the current coding block based at least in part on an SMVD indication for the current coding block, The coding device may obtain the SMVD indication that indicates whether SMVD is used in motion vector coding for the current coding block. If SMVD Indication indicates that SMVD is used in the motion vector coding for the current coding block, the coding device may bypass BDOF for the current coding block. The coding device may reconstruct, the current coding block without performing BDOF if it determines to bypass BDOF for the current coding block.

A method and apparatus are provided for predictive frame selection supporting enhanced efficiency and subjective quality. The apparatus includes an encoder for encoding a picture using a selection scheme that selects between encoding the picture as a single direction inter predictive picture type and a bi-directional inter predictive picture type based on coding efficiency and a determination of a flickering artifact resulting from coding the picture as the bi-directional inter predictive picture type.

Method and apparatus for predictive frame selection supporting enhanced efficiency and subjective quality

A method and apparatus are disclosed and described for providing bit rate configuration for multi-view video coding. In the video encoder, the method includes encoding image data for at least one picture for at least two joint views of multi-view video content, the at least two joint views including a base view and at least one dependent view. The bit rate configuration for encoding the image data is determined to include an average bit rate and a maximum bit rate for the base view and the average bit rate and the maximum bit rate for the at least two joint views ().

Method and apparatus for bit rate configuration for multi-view video coding

A method of encoding video wherein an end of scene is detected, frames are partitioned and groups of pictures (GOPs) may be merged. In the method, an end of scene in a plurality of input frames is detected. The input frames are partitioned into GOPs. If the number of frames at the end of scene GOP is below a low frame threshold, then those frames are merged with a preceding GOP. The GOPs are buffered and multiple threads of GOPs are encoded in parallel from the buffer in a single pass.

Multiple thread video encoding using GOP merging and bit allocation

A method of encoding video wherein multiple threads of GOPs are encoding in parallel from a buffer in a single pass. In the buffer GOPs having fewer frames than a low frame threshold at the end of a scene are merged with a preceding GOP. Hypothetical reference decoder (HRD) information is stored in the buffer for each GOP and HRD information for neighboring GOPs are merged in the buffer.

Multiple thread video encoding using HRD information sharing and bit allocation waiting

A method for accurately measuring flicker, by first determining an original value based on a difference between pixel values in corresponding locations in a first picture and a second picture. Next, a reconstructed value is determined, based on a difference between pixel values in corresponding locations in a reconstruction from an encoding of the first picture and a reconstruction from an encoding of the second picture. Then, a determination is made to include a comparison value, which is determined on a difference between the reconstructed value and the original value, in a measurement of flicker between the first picture and the second picture.

Method for measuring flicker

A method and apparatus are disclosed and described for providing rate control for multi-view video coding. The apparatus includes an encoder () for encoding image data for at least one picture for at least two joint views of multi-view video content. The at least two joint views include a base view and at least one dependent view. A bit allocation for encoding the image data is determined based on bit rate requirements for the base view and bit rate requirements for the at least two joint views.

Method and apparatus for rate control for multi-view video coding

According to an implementation, a value of distortion is determined. The value is associated with at least a portion of a particular picture in a series of pictures. The value is based on distortion in the particular picture that is attributable to error in the particular picture or in a previous picture in the series. The value is also based on distortion in a subsequent picture in the series that is attributable to error in the particular picture or in a previous picture.

Hybrid look-ahead and look-back distortion estimation

A method and apparatus are provided for encoding with hypothetical reference decoder compliant bit allocation. The apparatus includes an encoder () for encoding image data for a picture in a resultant bitstream by controlling a bit allocation during the encoding of the image data responsive to satisfying requirements for a subsequent decoding of the bitstream. The requirements relate to preventing at least one of an underflow condition and an overflow condition in a buffer during the subsequent decoding of the bitstream.

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Plainsboro, NJ, United States of America

Hua Yang