Microsoft Technology Licensing, LLC

Stephen C Rowe

Martyn S Lovell

Elliot H Omiya

Mahesh Prakriya

Tassaduq Basu

Wei Zeng

Lawrence William Osterman

Robert Albert Wlodarczyk

Michael Aksionkin

Shakeel Solkar

Neeraj Wadhwa

Jerry Jay Dunietz

Ales Holecek

Brent Rector

Harold L Pierson, Iii

Gary Joseph Sullivan

Glenn Frederick Evans

Patrick Henri Dussud

Steven E Lucco

Kirt A Debique

Raja Krishnaswamy

Robin C B Speed

Noel Richard Cross

James F Springfield

Harold Pierson

Igor B Peev

Alexandre Vicktorovich Grigorovitch

Rebecca Claire Weiss

Geoffrey T Dunbar

Patrick Nelson

Stephen Estrop

Sohail Baig Mohammed

Matthijs Arjan Gates

Gurpratap Virdi

Steven J Ball

Sumedh N Barde

Daniel Dinu

Steven Marcel Elza Wilssens

Xiaoyu Chai

Connie Qin Yang

Alexander S Weil

Tomas Aleksas Mereckis

Eamon Guthrie Cosgrove Millman

Soheil Sadeghi

Omari Carter-thorpe

Dragos C Avadanei

Tassaduq H Basu

Steven Edward Lucco

Brent E Rector

Lawrence W Osterman

Disclosed herein is a system for leveraging telemetry data representing usage of a component installed on a group of sampled computing devices to confidently infer the quality of a user experience and/or the behavior of the component (e.g., an operating system) on a larger group of unsampled computing devices. The system is configured to use a propensity score matching approach to identify a sampled computing device that best represents an unsampled computing device using configuration data that is collected from both the sampled and unsampled computing devices. The quality of the user experience and/or the behavior of the component may be captured by a metric of interest (e.g., a QoS value). Accordingly, the system is configured to use the known metric of interest, determined from the telemetry data collected for the sampled computing device, to determine or predict the metric of interest for the unsampled computing device.

Using propensity score matching to determine metric of interest for unsampled computing devices

Various embodiments provide an ability to describe, independent of a programming language, one or more interfaces associated with an operating system. Alternately or additionally, a compiler associated with a specific programming language can be configured to map the independent interface description(s) to the specific programming language. In some embodiments, an application can be configured to programmatically determine one or more interfaces of the operating system.

Runtime system

Information about the operating system application programming interfaces is stored in a known format in a known location. This information fully describes the APIs exposed by the operating system and is stored in API metadata files. A language compiler or interpreter uses this API information to build a natural and familiar representation of the native system API in the target language. The language compiler or interpreter can read the API information at compile time and/or runtime. The metadata is used to allow an application to refer to named elements in the API. Projections are built that use the metadata to map named elements in the API to named elements in the target language, and to define wrappers that marshal data of those elements between the target representation and the native operating system representation.

Projecting native application programming interfaces of an operating system into other programming languages

Various embodiments provide an ability to abstract type resolution between multiple type systems. At least one type can be described in one or more programmatically accessible file(s). In some embodiments, an application using a different type system can programmatically access and resolve a type of the at least one type system without knowledge of a location of where a description of the type resides. Alternately or additionally, type descriptions contained in the one or more programmatically accessible file(s) can be analyzed and restructured into one or more new programmatically accessible file(s) based, at least in part, upon the type descriptions.

Flexible metadata composition

Disparate devices in an audio/video ecosystem may be connected and managed by having multiple crossbar connections at nodes in a node and leaf network. The leaves of the network may be various audio and video devices, with receivers, personal computers, and other devices comprising the nodes, which have at least some crossbar switching ability. When the nodes are connected, some or all of the devices attached to all of the nodes may be made available at each interface for control and display. Each node may act as a crossbar, allowing a user at each interface to enjoy the services of any device, regardless of the node to which the device is attached.

Aggregated audio/video crossbar connections

Media may be dynamically rendered by receiving signals from one or more types of sensors sensing in an area, and obtaining from the signals information about one or more locations of furniture, or one or more locations of persons or heads or ears thereof, or identities of one or more persons in common with other data such as time of day, season, or other external metadata. Audio and/or video data may be rendered based on the locations or identities. The identity of a person can be automatically obtained and used to automatically select a rendering profile which is then used to render digital audio and/or video media. A dynamically changing spatial location of a head and/or or ears may be automatically determined and how an audio stream is rendered may be dynamically changed based on the spatial location.

Dynamic media rendering

A system and methods provide handling of variable rate playback in a multimedia computer architecture. The systems and methods provide data structures and interfaces that enable a computer architecture and components therein with the ability to playback data at speeds faster and slower than real-time, to playback data in reverse, and to change the rate of playback at any point during playback. One embodiment is a method for providing low-latency, glitch-free changes in a multimedia architecture. Other embodiments are directed to defining multimedia component responsibilities for making rate changes, allowing rate changes to work with standard playback types, coder-decoders, and renderers. The methods include determining a minimum of the maximum reported playback rates and determining minimum and maximum playback rates in a set of modes including: reverse skip mode, reverse key frame mode, reverse full mode, forward full mode, forward key frame mode, and forward skip mode.

Rate change

Techniques for playing a media file in a multimedia application include launching a multimedia application as one process and automatically launching a pipeline of one or more media processing components as one or more isolated processes. In this manner, any untrustworthy components can be executed in an isolated process that is separate from the execution process of the multimedia application, thereby improving fault tolerance and hang resistance.

Fault tolerant and hang resistant media processing applications

Described herein is an implementation that facilitates the reverse presentation of an encoded digital media stream. This abstract itself is not intended to limit the scope of this patent. The scope of the present invention is pointed out in the appending claims.

Reverse presentation of digital media streams

Assessment of de-interlaced video quality is determined automatically by de-interlacing interlaced video content using a reference de-interlacer and a test de-interlacer. The reference de-interlacer produces a result of known quality and the test de-interlacer is one which is being assessed. The result from each de-interlacer is compared to reference video content to derive a signal-to-noise ratio for each relative to the reference video content. The difference in the signal-to-noise ratios is compared against a predefined threshold. If the difference is within the range defined by the threshold, the test de-interlacer is determined to produce an acceptable product.

Automatic assessment of de-interlaced video quality

A system and method for calculating audio processing attribute in digital signal processing system are provided. A testing system generates a multi-channel test signal in which one channel is returned to the testing system and the other channel is sent to a tested system. The test signals are processed, mixed and correlated. The resulting differences in the correlated signals are used to calculate various processing attributes of the tested system.

System and method for measuring audio processing attributes in a computer system

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Bellevue, WA, United States of America

Stephen C Rowe