William B Sanders

US Patent:

7660512, Feb 9, 2010

Filed:

Oct 16, 2003

Appl. No.:

10/686969

Inventors:

William R. Sanders - Stanwood WA, US
Darren R. Davis - Woodinville WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 9/79
H04N 5/91
H04N 7/00
H04N 7/12
H04N 7/16
H04N 7/26
H04N 7/173
H04N 11/02
G06F 3/00
G06F 13/00
G06F 15/173
G09G 5/00
G11B 21/08

US Classification:

386 68, 386 6, 386 7, 386 8, 386 33, 386 65, 386 96, 386 98, 386111, 386112, 345537, 345611, 348461, 348513, 348515, 369 3008, 369 3009, 37524026, 37524028, 709224, 715723, 725134, 725142

Abstract:

Systems and methods for managing frame rates during multimedia playback are described herein. The ideal playback timing associated with video data is determined. If an actual playback timing of the video data lags the ideal playback timing, a frame rate associated with the video data is varied using a smoothing function to recover toward the ideal playback timing. An iterative frame-dropping algorithm is applied to vary the frame rate in accordance with the smoothing function. The smoothing function incorporates as a variable an average delay associated with playback of frames in the video data.

US Patent:

8320448, Nov 27, 2012

Filed:

Nov 28, 2008

Appl. No.:

12/324987

Inventors:

Weidong Zhao - Bellevue WA, US
Thomas W. Holcomb - Redmond WA, US
Chih-Lung B Lin - Redmond WA, US
William R. Sanders - Redmond WA, US
Shijun Sun - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 7/12
H04B 1/66

US Classification:

37524002, 375240

Abstract:

An encoder is disclosed that is partitioned into discrete hardware modules. The discrete modules include multiple re-entry and exit points that allow enhanced control by software. The software can control the discrete modules during the encoding process and make adjustments according to CPU bandwidth and/or user requirements allowing for enhanced quality control and seamless hardware/software operations. In one embodiment, a media stream is received into an encoder that includes a pipeline of multiple hardware stages for encoding. An intermediate result is provided from at least one of the hardware stages to an encoding control module that processes the intermediate result to determine configuration instructions for a next hardware stage in the pipeline. Thus, the encoding process can be modified dynamically through hardware and software interactions as the media stream progresses through the pipeline of the encoder.

US Patent:

20090323826, Dec 31, 2009

Filed:

Jun 30, 2008

Appl. No.:

12/217039

Inventors:

Yongjun Wu - Redmond WA, US
Naveen Thumpudi - Sammamish WA, US
Daniel Dinu - Redmond WA, US
William R. Sanders - Stanwood WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 7/26

US Classification:

37524027, 375E072

Abstract:

Error concealment techniques for video decoding are described. For example, a video decoder after finding a corrupted picture in a bit stream, finds a suitable neighbor for the corrupted picture. For example, the video decoder favors pictures with the same parity as the corrupted picture and considers picture order count and picture corruption in choosing a neighbor. The decoder then modifies syntax elements for the encoded video in the bit stream to allow the neighbor to be used in concealing the corruption in the corrupted picture. The modification of syntax elements can depend on the particular video decoder implementation. For example, in a software-only multithreaded video decoder, a task graph is modified, while in a system utilizing video acceleration, syntax elements for reference lists are modified.

Address:

17836 159 Ave SE, Renton, WA 98058

VIN:

5NPET4AC3AH580703

Make:

HYUNDAI

Model:

SONATA

Year:

2010