Invention Grant
US07756136B2 Spatial and temporal loss determination in packet based video broadcast system in an encrypted environment
有权
在加密环境中基于分组的视频广播系统的空间和时间损失确定
- Patent Title: Spatial and temporal loss determination in packet based video broadcast system in an encrypted environment
- Patent Title (中): 在加密环境中基于分组的视频广播系统的空间和时间损失确定
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Application No.: US12034493Application Date: 2008-02-20
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Publication No.: US07756136B2Publication Date: 2010-07-13
- Inventor: Praveen A. Mohandas
- Applicant: Praveen A. Mohandas
- Applicant Address: US PA Pittsburgh
- Assignee: Cheetah Technologies, L.P.
- Current Assignee: Cheetah Technologies, L.P.
- Current Assignee Address: US PA Pittsburgh
- Agency: Kelly Lowry & Kelley, LLP
- Main IPC: H04L12/28
- IPC: H04L12/28 ; H04L12/56 ; G02F1/35 ; G02F2/02
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.
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