Invention Grant
- Patent Title: Bi-directional video compression for real-time video streams during transport in a packet switched network
- Patent Title (中): 在分组交换网络传输期间实时视频流的双向视频压缩
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Application No.: US12328790Application Date: 2008-12-05
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Publication No.: US08798150B2Publication Date: 2014-08-05
- Inventor: Harsha Hegde , Tarun Agarwal
- Applicant: Harsha Hegde , Tarun Agarwal
- Applicant Address: US IL Chicago
- Assignee: Motorola Mobility LLC
- Current Assignee: Motorola Mobility LLC
- Current Assignee Address: US IL Chicago
- Agency: Fenwick & West LLP
- Main IPC: H04N7/26
- IPC: H04N7/26 ; H04N21/6437 ; H04L12/26 ; H04L29/06

Abstract:
A method, a system and a computer device for initiating bi-directional compression of a video stream in a packet switched network, based on delay tolerance of a service or application. A video frame recompression (VFR) utility determines an end-to-end (E2E) delay tolerance retrieved from a Real-time Transport Control Protocol (RTCP) report. The VFR utility then determines the actual expected delay based on a deep inspection of packet headers. The VFR utility utilizes a processing opportunity delay (which determines whether the E2E delay tolerance is greater than the actual expected delay) to reprocess video content comprising Intra-coded (I) pictures/frames and Predicted (P) frames to improve compression efficiency. The VFR utility may also utilize a complexity ratio which is a ratio of the I-Frame rate and the P-Frame rate to select frames for compression. The VFR utility recompresses video content by replacing P-Frames with B-Frames.
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