Michael C Jenkins

US Patent:

6480584, Nov 12, 2002

Filed:

Jun 28, 2001

Appl. No.:

09/894051

Inventors:

Joe W. Duran - Austin TX
Michael Vayden Jenkins - Austin TX
William Todd Clayton - Austin TX

Assignee:

Forgent Networks, Inc. - Austin TX

International Classification:

H04M 1100

US Classification:

379 9321, 37920201, 348 1408

Abstract:

A teleconferencing system with capability to store incoming multiple medium messages for later retrieval and playback is disclosed. The system includes a communications multiplexer which, in normal mode, receives the incoming message and routes the message to various output functions, including video, audio, and computer display. In store mode, the communications multiplexer receives the incoming message and communicates it to disk storage, for example by way of direct memory access. During playback, the communications multiplexer receives data from the disk storage, and controls its communication to the various output functions, in the same manner as during receipt of a normal incoming message during an interactive teleconference. As a result, multiple medium messages may be stored for later retrieval, with the playback appearing in the same manner as a conventional teleconference message.

US Patent:

6674960, Jan 6, 2004

Filed:

Oct 4, 2002

Appl. No.:

10/264749

Inventors:

Joe W. Duran - Austin TX
Michael Vayden Jenkins - Austin TX
William Todd Clayton - Austin TX

Assignee:

Forgent Networks, Inc. - Austin TX

International Classification:

H04N 5781

US Classification:

386 96, 386125

Abstract:

A computer based television signal recording device is provided. This recording device allows for the recording of input streams onto a mass storage device such as a computer hard drive. The playback of individual programs can be done independently of the recording. A user interface is provided which has a list of the recorded television signals and the user can select for playback any of the listed recorded television signals.

US Patent:

7545435, Jun 9, 2009

Filed:

Apr 15, 2005

Appl. No.:

11/107401

Inventors:

Michael V. Jenkins - Austin TX, US
Bradley Richard Ree - Austin TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

H04N 5/235
H04N 1/40
G06K 9/40

US Classification:

348362, 3482211, 348363, 358466, 382274

Abstract:

In some embodiments, images for the video conference may be white balanced and/or exposure controlled. White balancing may include dividing an image's pixels into multiple ranges according to their luminance and chrominance values. In some embodiments, blue and red analog gains may be modified to bring red and blue accumulations closer to green accumulations. In some embodiments, luminance values for an image may be adjusted by increasing or decreasing exposure. The decision whether to increase or decrease the exposure may be made by looking at statistics for luminance values of skin colored regions if there are sufficient skin colored regions on the image. Otherwise, luminance values for the entire image may be analyzed to determine whether to increase or decrease exposure.

US Patent:

7667762, Feb 23, 2010

Filed:

Aug 1, 2006

Appl. No.:

11/461635

Inventors:

Michael V. Jenkins - Buda TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

H04N 9/09
H04N 9/093
H04N 9/07

US Classification:

348362, 348263, 348264, 348267

Abstract:

Various embodiments of a dual-sensor video camera are disclosed. The dual-sensor video camera includes a color filter array (CFA) sensor, which has a low-pass filter. The dual-sensor video camera also includes a panchromatic sensor. A beam splitter directs an incoming light beam to both sensors. An output image is produced based on image information from the two sensors. The output image includes luminance information based on the image information from the panchromatic sensor and chrominance information based on the image information from the CFA sensor.

US Patent:

7692683, Apr 6, 2010

Filed:

Oct 17, 2005

Appl. No.:

11/252238

Inventors:

Michael L. Kenoyer - Austin TX, US
Michael V. Jenkins - Buda TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

H04N 7/14
H04Q 11/00

US Classification:

348 1408, 348 1412, 348 1413

Abstract:

In various embodiments, multiple participants (at endpoints) may connect through a video conferencing system. A screen may display other participants in the conference call. For example, multiple participants may be displayed in respective portions of the screen. In some embodiments, each of the participants may use video conferencing systems that support different resolutions. In some embodiments, a transcoder may resolution transcode signals to allow the conference call participants to be displayed on each participant's respective screen at up to the highest possible resolution supported by the respective screen. For example, low resolution video conferencing systems may be displayed on a high definition screen of a high resolution system at the low resolution of the low resolution video conferencing system while another image on the same high definition screen from a different, higher resolution video conferencing system, may be displayed at the higher resolution.

US Patent:

7864221, Jan 4, 2011

Filed:

Apr 17, 2006

Appl. No.:

11/405354

Inventors:

Michael V. Jenkins - Buda TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

H04N 9/73

US Classification:

3482231, 396225

Abstract:

In some embodiments, images for the video conference may be white balanced. White balancing may include dividing at least a subset of an image's pixels into multiple ranges according to their luminance and chrominance values. For example, at least a portion of the pixels in an image may be sorted into different groups (i. e. , by incrementing counters respective to each group) according to the luminance and chrominance values of the pixels. If enough pixels are found to be in a particular group, a portion or all of the image may be adjusted by a ratio corresponding to that particular group. For example, blue and red analog gains (corresponding to the selected pixels) may be modified by a corresponding ratio to bring red and blue accumulations closer to green accumulations.

US Patent:

8311129, Nov 13, 2012

Filed:

Dec 15, 2006

Appl. No.:

11/611494

Inventors:

Michael V. Jenkins - Buda TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

H04N 11/04

US Classification:

37524029, 37524012, 37524014

Abstract:

In various embodiments, temporal filtering may be used to reduce noise over time in a series of video frames. A temporal filter may use previous filtered frames to reduce the noise in a current frame. For example, a temporal filter may filter noise in still parts of an image more strongly than in moving parts of the image. In some embodiments, a temporal filter requiring less processing power may include a method for detecting motion between a set of pixels and applying the temporal filter based on the detected motion. For example, if substantial motion is not detected, the temporal filter for the block of pixels may be stronger (i. e. , reduce more noise) than the temporal filter applied to a block of pixels for which substantial motion has been detected.

US Patent:

8437505, May 7, 2013

Filed:

Dec 17, 2009

Appl. No.:

12/640450

Inventors:

Stephen P. Flosdorf - Round Rock TX, US
Michael V. Jenkins - Buda TX, US

Assignee:

LifeSize Communications, Inc. - Austin TX

International Classification:

G06K 9/00

US Classification:

382103

Abstract:

A system and method for detecting local motion between image frames are presented. Each image frame may include a plurality of pixels. A first image frame and a second image frame may be received. Values of a first plurality of pixels at first pixel locations of the first image frame may be read. Values of a second plurality of pixels at second pixel locations of the second image frame may be read. The first pixel locations of the first image frame may correspond to the second pixel locations of the second image frame. A first delta function, based on differences between pixel values between the first and second image frames, may be calculated to produce a first output. The first output may be compared to a first one or more thresholds. It may be determined whether local motion has occurred in the second image frame based on said comparing.