Microsoft Technology Licensing, LLC

Frank Dominic Yerrace

Paul England

Marcus Peinado

Christopher Andrew Evans

Sterling M Reasor

Louis Amadio

Giampiero M Sierra

Elliot H Omiya

Victor Tan

Kelly Elizabeth Rollin

Cheng-mean Liu

Rian Chung

Patrick Markus Baudisch

Steven J Ball

Rajneesh Mahajan

Lawrence William Osterman

Robin C B Speed

Kishore Arvind Kotteri

Mitchell K Rundle

Robert Moodie Heddle

Daniel J Sisolak

John Bregar

Annette Marie Crowley

Kenneth Harry Cooper

Eric T Holk

Nicholas J Benson

Stephen Smith

Catherine Werner

Adeel Aslam

Kristin Condit

Geoff Dahl

Yuk Lai Suen

One or more techniques and/or systems are provided for communicating between two or more drivers respectively controlling and/or managing different channels through which data is transferred between a wireless communication device and a computer system and/or between a controller of the computer system and an application of the computer system. Typically, at least one of the channels is configured to transmit time sensitive data (e.g., such as audio data) while another channel is configured to transmit time insensitive data (e.g., such as call control data). A device driver interface may be configured to provide a medium through which the two or more drivers can communicate. The techniques and/or systems find particular application with respect to Bluetooth headsets used in combination with a computer system comprising a system on chip architecture, but other applications are also contemplated.

Transference of time sensitive data between a wireless communication device and a computer system

Embodiments described herein include devices and processes for concurrently processing different audio streams with different hardware-based audio processing modes. A computing device for such embodiments may have multiple hardware audio signal processing modes capable of parallel execution. An operating system or audio stack thereof may manage audio paths or streams for audio sources producing respective types of audio signals. Which of the audio paths or streams will be connected with which of the hardware audio signal processing modes may be determined according to the types of the audio signals. A first hardware audio signal processing mode may be processing a first type of audio signal of a first audio path or stream while concurrently a second hardware audio signal processing mode processes a second type of audio signal of a second audio path or stream.

Multiple concurrent audio modes

An off-host audio engine interface exposes audio processing capabilities to a host. The interface receives offloaded audio streams and a host-processed audio stream from the host. The off-host audio engine processes the offloaded audio streams individually to create off-host-processed audio streams. The host-processed audio stream is mixed with the off-host-processed streams to create a mixed stream. The mixed stream undergoes audio processing by the off-host engine. The off-host audio engine provides output and reference audio streams based on the mixed audio stream. The reference stream can be provided to the host via the interface. Via the interface, the host can control local and global audio processing performed by the off-host engine by enabling or disabling local and global processing, and by enabling or disabling local and global audio processing components of the off-host audio engine.

Exposing off-host audio processing capabilities

Digital content is released to a rendering application for forwarding by such rendering application to an ultimate destination by way of a path therebetween. The path is defined by at least one module, and the digital content is initially in an encrypted form. An authentication of at least a portion of the path is performed to determine whether each defining module thereof is to be trusted to appropriately handle the digital content passing therethrough. The encrypted digital content is decrypted if in fact each such defining module is to be trusted, and the decrypted digital content is forwarded to the rendering application for further forwarding to the ultimate destination by way of the authenticated path.

Releasing decrypted digital content to an authenticated path

A computer-implemented authentication protocol is used to subvert man-in-the-middle-type attacks on communications between software components that are permitted to interoperate within a processing environment, such as a media processing environment, pursuant to one or more licenses. In one exemplary scenario, a particular application transmits to a particular media processing component ('MPC'), among other things, a cryptographically protected message including a reference to a process in which the application is running and/or a GUID that the application used to invoke the MPC. If the received process and/or GUID are verified, it is possible for in-the-clear communication to occur between the application and the MPC without man-in-the-middle subversion.

Authentication/authorization protocol for media processing components

Example embodiments of the present disclosure provide techniques for multiple audio device capture and playback during a remote desktop session. A custom device manager may instantiate proxy audio input and output devices on the server corresponding to each real device on the client computer. The proxy devices may redirect their respective audio input and output data to the physical device on the client. In an embodiment, multiple audio devices may be instantiated during a remote session, and multiple independent audio streams may be redirected to the selected device on the client computer.

Redirection of multiple remote devices

Described herein are one or more implementations offering a centralized (e.g., single-point) user-interface, where a user may manipulate audio properties (e.g., volume level) for one or more audio submixes produced by each of multiple active operating-system processes.

Audio submix management

The driving of an audio device that supports two or more audio modes is accomplished by associating a first physical device object of an audio device with a first device identifier, the first physical device object representing a first audio mode enumerated by a bus enumerator; associating a second physical device object of an audio device with a second device identifier, the second physical device object representing a second audio mode enumerated by the bus enumerator; and if the first device identifier matches the second device identifier, enabling a coupled kernel streaming audio interface compatible with both the first physical device object and the second physical device object.

Exposing multi-mode audio device as a single coherent audio device

A volume control may be provided with some integrated graphical indication of the presence and/or level of an audio signal that it controls. For example, a slider-type volume control may be provided with a signal meter within the slider itself. A volume control may be provided with a mechanism for showing the non-mute volume control level of a volume when the volume control is muted. For example, a slider-type volume control may display a ghosted slider tab at the level of volume control in effect before muting while at the same time displaying a regular slider tab at a muted level. A user may be able to glance at a volume control and quickly and intuitively understand aspects of the volume control's state such as the level and condition of the signal that is flowing through or blocked by (if muted) the control.

Volume control

Methods and apparatuses are provided for controlling application software while switching between session in a multi-session computing environment. An apparatus includes memory coupled to switching logic and application program managing logic. The switching logic is configured to selectively switch console control of a computing device between at least two user kernel sessions that are maintained in the memory. The application program managing logic is configured to selectively control at least one application program that is operatively configured within at least one of the user kernel sessions. For example, the application program managing logic can be configured to stop the operation, restart certain application programs, notify application programs about switching events, and/or adjust the playback of audio and/or video signals associated certain application programs.

Methods and apparatuses for handling single-user applications in multi-user computing environments

Methods and apparatuses are provided for controlling application software while switching between sessions in a multi-session computing environment. An apparatus includes memory coupled to switching logic and application program managing logic. The switching logic is configured to selectively switch console control of a computing device between at least two user kernel sessions that are maintained in the memory. The application program managing logic is configured to selectively control at least one application program that is operatively configured within at least one of the user kernel sessions. For example, the application program managing logic can be configured to stop the operation, re-start certain application programs, notify application programs about switching events, and/or adjust the playback of audio and/or video signals associated certain application programs.

The disclosed invention constitutes a method and system, including an audio mixer, for selecting audio streams from one or more applications running on a computer system. An application can register its audio streams with the audio mixer either as sound focus audio streams or as priority audio streams. With respect to the sound focus audio streams, the audio mixer determines which of the applications has the sound focus and generates an audio output signal from those sound focus audio streams to drive the computer's sound device and thereby to produce an audible sound for the user. Sound focus is determined when an application gains the input focus, opens an audio stream, closes an audio stream, or registers with the audio mixer. With respect to the priority audio streams, those priority audio streams are always selected by the audio mixer and are mixed with the sound focus audio streams from the application having sound focus to generate a composite audio output signal. The audio streams are scaled so that mixing audio streams does not normally exceed the volume limit of the sound device.

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Bellevue, WA, United States of America

Frank Dominic Yerrace