InterDigital CE Patent Holdings

Systems, methods, and instrumentalities associated with fixed-filters with adaptive loop filter for deblocking filtering. The device may include a processor configured to obtain a plurality of reconstructed samples. The device may obtain a plurality of fixed adaptive loop filtered reconstructed samples by applying a fixed adaptive loop filter (ALF) on the plurality of reconstructed samples. The device may apply a deblock filter (DBF) on the plurality of fixed adaptive loop filtered reconstructed samples to obtain a plurality of deblock filtered reconstructed samples. The device may obtain a reconstructed picture based on the plurality of deblock filtered reconstructed samples.

Features described herein are associated with decoding using external pictures and related high-level syntax (HLS). In examples, a device (e.g., a video decoding device) may determine that a triggering criterion for obtaining an external picture has been met. The video decoding device may obtain the external picture from an external decoding source. The video decoding device may store the external picture in a decoded picture buffer (DPB) associated with the video content. In examples, a device (e.g., a video encoding device) may obtain an external picture from an external decoding source. The video encoding device may store the external picture in a reference picture buffer associated with the video content. The video encoding device may send an indication associated with a triggering criterion for obtaining the external picture.

In some implementations, a method is presented, comprising: assigning a first importance indication to a first data set for an Extended Reality scene, the first data set corresponding to first one or more media contents in the Extended Reality scene; and assigning a second importance indication to a second data set for the Extended Reality scene, the second data set corresponding to second one or more media contents in the Extended Reality scene, wherein the first importance indication is different from the second importance indication, and wherein the first importance indication and the second importance indication are based on at least one of a viewing distance, a viewing frustum, a screen coverage, rendering quality, and quality of experience.

A method of video decoding is disclosed. For a zone of a frame, at least one budget of use of at least one coding tool is obtained. A current block of the zone of the frame is decoded using the at least one coding tool. A value is added to at least one counter associated with the at least one coding tool. The coding tool is deactivated for decoding a rest of the zone of the frame responsive to the counter being higher than the at least one budget of use.

A first prediction mode of lowest index and a second prediction mode of highest index are obtained. A first prediction error is determined on a template for the first prediction mode and a second prediction error is determined for the second prediction mode. Responsive to the first prediction error being lower than the second prediction error, the second prediction mode is updated (a) as being equal to an average of the lowest index and the highest index and an updated second prediction error is determined. Responsive to the second prediction error being lower than the first prediction error, the first prediction mode is updated (b) as being equal to an average of the lowest index and the highest index and an updated first prediction error is determined. Steps a) and b) are repeated until an end criterion. The intra prediction mode with smallest prediction error is selected.

Systems, methods, and instrumentalities associated with film model estimation. The device may include a processor configured to determine a dispersion value associated with a block in a picture. The device may determine whether to use the block for film grain analysis based on the dispersion value of the block. The device may, based on the determination to use the block for film grain analysis, add the block to a list of blocks for film grain analysis. The device may derive a film grain model for the picture based on the list of blocks for film grain analysis.

Systems, methods, and instrumentalities are disclosed for film grain scaling function estimation improvements. For example, a video processing device may obtain current film grain characteristics data associated with a current picture. The video processing device may obtain aggregated film grain characteristics data associated with a plurality of previous pictures. A film grain model may be determined for the current picture based on the current film grain characteristics data associated with a current picture and the aggregated film grain characteristics data associated with a plurality of previous pictures. The video processing device may include an indication of the determined film grain model for the current picture. In examples, the video processing device may combine the aggregated film grain characteristics data with the current film grain characteristics data. The film grain analysis may be performed based on the combined film grain characteristics data.

Systems, methods, and instrumentalities disclosed herein may be related to a carriage of avatar animation streams in ISO base media file format (ISOBMFF) containers. In examples, a device may include a processor. The device may be configured to determine an animation parameter associated with avatar information. The device may obtain an avatar animation track that comprises an animation field indicator. The animation field indicator may indicates the animation parameter associated with the avatar information. The device may send, in a media container, the avatar animation track. In examples, a device may obtain a media container. The device may determine an avatar animation track based on the obtained media container. The device may determine an animation parameter associated with avatar information based on an animation field indicator of the avatar animation track. The device may decode the avatar information based on the animation field indicator.

A method, in a receiver, is disclosed. An avatar animation bitstream is received from a transmitter. The avatar animation bitstream comprises at least one avatar animation unit (AAU). A header of the at least one avatar animation unit (AAU) is decoded. It is then determined from the header that the AAU is a silent AAU, a silent AAU indicating to the receiver that the transmitter is not sending any animation data. Responsive to the determining, a first syntax element indicating a number of ticks per second and a second syntax element indicating a duration of the silent AAU are decoded. A target avatar is rendered taking into account the first and second syntax elements.

A system, device and method used for mapping in an animation link are disclosed. The method includes obtaining an Avatar Representation Format (ARF) comprising a preamble, the preamble including at least one supported animation with at least one animation link, parsing the at least one animation link, parsing a type and a mapping array of the parsed at least one animation link, and parsing at least one index in the parsed mapping array.