Microsoft Technology Licensing, LLC

Daniel J Sisolak

Elliot H Omiya

Henrique Sarmento Malvar

Ross Garrett Cutler

Ivan Jelev Tashev

Frank Dominic Yerrace

Kenneth H Cooper

Cheng-mean Liu

John E Unverferth, Iii

Various embodiments utilize different counters or clocks, working in concert, to smooth out position information that is derived for a rendering/capturing device. Specifically, in at least some embodiments, each counter or clock has a different speed. A faster counter or clock is used to determine intra-transition position offsets relative to a slower counter or clock.

Deriving accurate media position information

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

An exemplary audio system includes an audio engine, one or more shared buffers where each shared buffer is associated with a client application and one or more lock-free mechanisms to help ensure that a write position of a shared buffer stays equal to or ahead of a read position for that shared buffer and to ensure that a client application's failure to maintain a write position equal to or ahead of a read position does not prevent audio engine access to the shared buffer. Other exemplary technologies are also disclosed.

Lock-free shared audio buffer

A self-descriptive microphone array includes a microphone array memory, such as, for example a ROM, EEPROM, or other conventional memory, which contains a microphone array device description. This device description includes parametric information which defines operational characteristics and configuration of the microphone array. In further embodiments, the microphone array uses any of a variety of conventional wired or wireless computer interfaces, including serial, IEEE 1394, USB, Bluetooth&#x2122;, etc., to connect to a computing device. Once connected, the microphone array provides its device description to the computing device. Sound processing software residing within the computing device is then automatically configured for optimally interacting with one or more analog or digital audio signals provided by the microphone array. In another embodiment, the microphone array performs integrated self calibration for automatically updating the device description. The self calibration is performed either upon connection to the computing device, or upon regular or user-specified intervals.

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Issaquah, WA, United States of America

Daniel J Sisolak