Bi Hui Chen

US Patent:

7965338, Jun 21, 2011

Filed:

Apr 6, 2006

Appl. No.:

11/278930

Inventors:

Bi Chen - San Jose CA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 17/02
H04N 9/475

US Classification:

348515, 348194

Abstract:

Techniques for evaluating media player performance are described. A particular implementation supplies media to a media player where the media includes a video component which has a waveform that alternates between a first video state and a second video state, and an audio component which has a waveform that alternates between a first audio state and a second audio state. In the supplied media the audio and video components are temporally synchronized in transition between respective first and second states. The process further analyzes corresponding output from the media player to determine an extent to which the audio and video components are temporally unsynchronized.

US Patent:

20060146185, Jul 6, 2006

Filed:

Jan 5, 2005

Appl. No.:

11/029912

Inventors:

Bi Chen - San Jose CA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 11/02

US Classification:

348410100

Abstract:

Software-based audio rendering is described. A particular implementation includes computer readable media configured to measure a first drift rate between an external clock and an audio clock until the drift reaches a threshold. Responsive to the drift reaching the threshold and based upon the first drift rate, the implementation manipulates the audio clock to achieve a second drift rate having a smaller value and an opposite polarity from the first drift rate.

US Patent:

20060150071, Jul 6, 2006

Filed:

Jan 5, 2005

Appl. No.:

11/029860

Inventors:

Bi Chen - San Jose CA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 17/00

US Classification:

715500100

Abstract:

Systems and methods for software-based video rendering are described. A particular implementation includes computer readable media configured to monitor a display cycle of hardware components configured to scan video frames for display on a display device and to render a video frame based, at least in part, on the monitored display cycle.