Praveen A Mohandas from Katy, TX, age 56

Spatial And Temporal Loss Determination In Packet Based Video Broadcast System In An Encrypted Environment
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US Patent:

7756136, Jul 13, 2010
Filed:

Feb 20, 2008
Appl. No.:

12/034493
Inventors:

Praveen A. Mohandas - Thousand Oaks CA, US
Assignee:

Cheetah Technologies, L.P. - Pittsburgh PA
International Classification:

H04L 12/28
H04L 12/56
G02F 1/35
G02F 2/02
US Classification:

370395
Abstract:

A method for determining spatial and temporal loss in a packet based video broadcast system in an encrypted environment involves measuring video coding layer information at an unencrypted head end of a video stream and network layer information at an encrypted downstream end of the same video stream. Video coding layer information is correlated with network layer information having a corresponding time stamp to compute the spatial and temporal loss. The video coding layer and network layer information is taken from discrete segments of the video stream including access units, slices or macroblocks. Impairments in the video stream are determined using the computed spatial and temporal loss.

Image Complexity Computation In Packet Based Video Broadcast Systems
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US Patent:

8107540, Jan 31, 2012
Filed:

Jul 10, 2006
Appl. No.:

11/456505
Inventors:

Praveen A. Mohandas - Thousand Oaks CA, US
Assignee:

Cheetah Technologies, L.P. - Pittsburgh PA
International Classification:

H04B 1/66
US Classification:

37524026, 37524003, 37524005, 37524013, 37524012, 37524001, 382235, 382251, 382238, 382234
Abstract:

A method to determine real time image complexity in video streaming, IPTV and broadcast applications using a statistical model representing channel bandwidth variation and image complexity that considers scene content changes. Available channel bandwidth is distributed unevenly among multiple video streams in proportion to bandwidth variation and image complexity of the broadcast video stream. The distribution of available channel bandwidth is determined based upon an image complexity factor of each video stream as determined from probability matrices considering bandwidth variations and image complexity.

Image Complexity Computation In Packet Based Video Broadcast Systems
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US Patent:

20090125291, May 14, 2009
Filed:

Jan 29, 2009
Appl. No.:

12/362114
Inventors:

Praveen A. Mohandas - Thousand Oaks CA, US
Assignee:

Symmetricom, Inc. - San Jose CA
International Classification:

G06F 17/50
US Classification:

703 13
Abstract:

A method to determine real time image complexity in video streaming, IPTV and broadcast applications using a statistical model representing channel bandwidth variation and image complexity that considers scene content changes. Available channel bandwidth is distributed unevenly among multiple video streams in proportion to bandwidth variation and image complexity of the broadcast video stream. The distribution of available channel bandwidth is determined based upon an image complexity factor of each video stream as determined from probability matrices considering bandwidth variations and image complexity.

Measuring Video Quality Using Partial Decoding
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US Patent:

20100110199, May 6, 2010
Filed:

Nov 3, 2008
Appl. No.:

12/264175
Inventors:

Stefan Winkler - Santa Clara CA, US
Praveen Mohandas - Thousand Oaks CA, US
Yves Cognet - Menlo Park CA, US
International Classification:

H04N 17/00
US Classification:

348180, 348E17001
Abstract:

The quality of video that is broadcast as a packet-based video stream is measured using decoded pictures in combination with information extracted from the transport stream and elementary stream layers of the packet-based video stream. The decoded pictures include selected frames and/or slices decoded from the packet-based video stream and are used to generate video content metrics. A composite score for the video quality can be generated from the video content metrics in combination with quality metrics of the transport stream and/or the elementary stream. If the composite score falls below a minimum score, a snapshot of the video is captured for later analysis.

Systems And Processes For Estimating And Determining Causes Of Video Artifacts And Video Source Delivery Issues In A Packet-Based Video Broadcast System
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US Patent:

20140098899, Apr 10, 2014
Filed:

Oct 4, 2013
Appl. No.:

14/046623
Inventors:

- Pittsburgh PA, US
Praveen A. Mohandas - Thousand Oaks CA, US
Assignee:

CHEETAH TECHNOLOGIES, L.P. - Pittsburgh PA
International Classification:

H04N 7/26
US Classification:

37524027
Abstract:

Estimating and determining causes of video artifacts and video source delivery issues is conducted by a hybrid approach utilizing both video coding layer with DCT information as well as pixel domain information. Coded syntax elements and data as well as sample information in the compressed frequency domain of the video coding layer is analyzed in real time and parallel image analysis algorithms are performed on pixel samples on the GPU core. Computed values from the video coding layer and the image layer are combined to deduce cause of the video artifact and video source delivery issues.