John Paul Spearman

US Patent:

7876685, Jan 25, 2011

Filed:

Jul 23, 2008

Appl. No.:

12/178367

Inventors:

Stephen Botzko - Reading MA, US
John Paul Spearman - Austin TX, US
Richard Flott, Jr. - Austin TX, US
David Hein - Austin TX, US

Assignee:

Polycom, Inc. - Pleasanton CA

International Classification:

G06F 11/00

US Classification:

370235, 370230, 370252

Abstract:

Devices and techniques for overcoming lost packets and avoiding congestion when conducting media conferences over packet switched networks are described herein. To avoid the problem of lost packets, redundant information is inserted into the media stream that permits the receiver to reconstruct any lost packets from the redundant information. Congestion avoidance techniques include adjusting the bitrate of the media stream to find the highest bitrate that can be supported without packet loss due to congestion. When increasing the bitrate to a higher rate, the additional bits can come from the redundant information used for lost packet recovery so that any lost packets caused by network congestion will not adversely affect the bitstream.

US Patent:

8493862, Jul 23, 2013

Filed:

Dec 14, 2010

Appl. No.:

12/967787

Inventors:

Stephen Botzko - Reading MA, US
John Paul Spearman - Austin TX, US
Richard Flott, Jr. - Austin TX, US
David Hein - Austin TX, US

Assignee:

Polycom, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

370235, 370252

Abstract:

Devices and techniques for overcoming lost packets and avoiding congestion when conducting media conferences over packet switched networks are described herein. To avoid the problem of lost packets, redundant information is inserted into the media stream that permits the receiver to reconstruct any lost packets from the redundant information. Congestion avoidance techniques include adjusting the bitrate of the media stream to find the highest bitrate that can be supported without packet loss due to congestion. When increasing the bitrate to a higher rate, the additional bits can come from the redundant information used for lost packet recovery so that any lost packets caused by network congestion will not adversely affect the bitstream.

US Patent:

20130208079, Aug 15, 2013

Filed:

Feb 8, 2013

Appl. No.:

13/763382

Inventors:

David Bourgoyne - The Hills TX, US
Avishay Halavy - Tel-Aviv, IL
John Spearman - Austin TX, US
Dmitry Veremeev - Petach-Tikva, IL
Xiaowei Wang - Austin TX, US

Assignee:

Polycom, Inc. - San Jose CA

International Classification:

H04N 7/15

US Classification:

348 1409

Abstract:

Disclosed are example embodiments of a method and system to reduce re-transmission requirements of a compress media transferring system implemented in a network where packet loss could be possible. An extended header for each transmitted packet can indicate the priority of the packet and endpoints can determine if a re-transmission of a missing packet is desired. Buffering of packets at different hops in a multi-hop system could allow for the retransmission request to be satisfied by a more recent hop than the original system transmitting the video packet. In one embodiment three levels of priority are established to achieve a reliable frame rate of 30 frames per second by compressing the first and second levels at 7.5 frames per second and a third level at 15 frames per second.

US Patent:

20220408029, Dec 22, 2022

Filed:

Jun 14, 2022

Appl. No.:

17/840565

Inventors:

- Santa Cruz CA, US
John Paul Spearman - Austin TX, US

International Classification:

H04N 5/268
G06T 7/70
H04N 5/232
H04R 1/40
H04R 3/00
G10L 17/18

Abstract:

Multiple cameras in a conference room, each pointed in a different direction. At least a primary camera includes a microphone array to perform sound source localization (SSL). The SSL is used in combination with a video image to identify the speaker from among multiple individuals that appear in the video image. Neural network or machine learning processing is performed on the primary camera video of the identified speaker to determine the facial pose of speaker. The locations of the other cameras with respect to the primary camera have been determined. Using those locations and the facial pose, the camera with the best frontal view of the speaker is determined. That camera is set as the designated camera to provide video for transmission to the far end.

US Patent:

20210211742, Jul 8, 2021

Filed:

Jan 6, 2020

Appl. No.:

16/735008

Inventors:

- Santa Cruz CA, US
John Paul Spearman - Austin TX, US
Stephen C. Botzko - Reading MA, US

International Classification:

H04N 19/89

Abstract:

Utilizing two LTR frames for improved error recovery. By using two LTR frames, much better performance is achieved in terms of error recovery as the likelihood of the decoder having one of the two LTR frames is very high. When the decoder determines a frame is lost, the decoder provides a fast update request (FUR). The FUR includes a listing of the LTR frames present at the decoder. With this indication of the LTR frames present at the decoder, the encoder utilizes one of the LTR frames, preferably the most recent, to use as a reference to send the next frame as a P frame. The P frame is sent with an indication of the LTR frame used as reference. The use of two LTR frames and the feedback of LTR frames present at the decoder allows the minimization of the use of I frames for error recovery.