Microsoft Technology Licensing, LLC

Ntt Docomo, Inc.

Roblox Corporation

Sandeep Kanumuri

Gary Joseph Sullivan

Frank Jan Bossen

Yongjun Wu

Naveen Thumpudi

Shyam Sadhwani

Onur Gonen Guleryuz

Choong Seng Boon

Akira Fujibayashi

Lihua Zhu

B Anil Kumar

Sridhar Sankuratri

Sathyanarayanan Karivaradaswamy

Jonathan Paul Rosenberg

Leon Bottou

Samuel Thomas Williams

M Reha Civanlar

Don Dongwoo Kim

Yoshinori Suzuki

Rui Zhao

Sadaatsu Kato

Ulas C Kozat

Matthew Richard Wozniak

Mehmet Umut Demircin

Oztan Harmanci

Frederick Umminger

Johannes P Kopf

Sang Kun Choe

Reha Civanlar

Philippe Clavel

Jesse Hakanen

Jett Evan Jones

Peter G Sibley

Pavel Pavlov

Plamen Dragozov

Jinglin Shen

Joshua Ray Taylor

Slawomir Strumecki

Palmer Noel Hogen

Jason Lawrence Golubock

Hitesh Chhabra

Jeffrey D Day

Joel Corley

Anil B Kumar

Reha M Civanlar

Disclosed herein are innovations for bitstreams having clean random access (CRA) pictures and/or other types of random access point (RAP) pictures. New type definitions and strategic constraints on types of RAP pictures can simplify mapping of units of elementary video stream data to a container format. Such innovations can help improve the ability for video coding systems to more flexibly perform adaptive video delivery, production editing, commercial insertion, and the like.

Constraints and unit types to simplify video random access

Innovations in signaling of reference picture list ('RPL') modification information. For example, a video encoder evaluates a condition that depends at least in part on a variable indicating a number of total reference pictures. Depending on the results of the evaluation, the encoder signals in a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. A video decoder evaluates the condition and, depending on results of the evaluation, parses from a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. The condition can be evaluated as part of processing for an RPL modification structure that includes the flag, or as part of processing for a slice header. The encoder and decoder can also evaluate other conditions that affect syntax elements for list entries of the RPL modification information.

Conditional signaling of reference picture list modification information

Innovations in control and use of chroma quantization parameter ('QP') values that depend on hum QP values. More generally, the innovations relate to control and use of QP values for a secondary color component that depend on QP values for a primary color component. For example, during encoding, an encoder determines a QP index from a primary component QP and secondary component QP offset. The encoder maps the QP index to a secondary component QP, which has an extended range. The encoder outputs at least part of a bitstream including the encoded content. A corresponding decoder receives at least part of a bitstream including encoded content. During decoding, the decoder determines a QP index from a primary component QP and secondary component QP offset, then maps the QP index to a secondary component QP, which has an extended range.

Control and use of chroma quantization parameter values

Innovations in control and use of chroma quantization parameter ('QP') values that depend on luma QP values. More generally, the innovations relate to control and use of QP values for a secondary color component that depend on QP values for a primary color component. For example, during encoding, an encoder determines a QP index from a primary component QP and secondary component QP offset. The encoder maps the QP index to a secondary component QP, which has an extended range. The encoder outputs at least part of a bitstream including the encoded content. A corresponding decoder receives at least part of a bitstream including encoded content. During decoding, the decoder determines a QP index from a primary component QP and secondary component QP offset, then maps the QP index to a secondary component QP, which has an extended range.

Implementations described herein relate to methods, systems, and computer-readable media to provide spatialized audio in virtual experiences. The spatialized audio may be used in voice communications such as, for example, voice and/or video chats. The chats may include spatialized audio that is combined at a client device, or at an online experience platform, and is targeted to a particular user. Individual audio streams may be collected from a plurality of avatars and other objects, and combined based on the target user. The audio may also include background and/or ambient sounds to provide a rich, immersive audio stream in virtual experiences.

Spatialized audio chat in a virtual metaverse

Growing community of inventors

Redmond, WA, United States of America

Sandeep Kanumuri