Invention Grant
- Patent Title: Bidirectionally decodable Wyner-Ziv video coding
- Patent Title (中): 双向解码Wyner-Ziv视频编码
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Application No.: US12141152Application Date: 2008-06-18
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Publication No.: US08218633B2Publication Date: 2012-07-10
- Inventor: Oscar Chi Lim Au , Xiaopeng Fan
- Applicant: Oscar Chi Lim Au , Xiaopeng Fan
- Applicant Address: US DE Wilmington
- Assignee: Kiu Sha Management Limited Liability Company
- Current Assignee: Kiu Sha Management Limited Liability Company
- Current Assignee Address: US DE Wilmington
- Agency: Turocy & Watson, LLP
- Main IPC: H04B1/66
- IPC: H04B1/66

Abstract:
Systems and methodologies for employing bidirectionally decodable Wyner-Ziv video coding (BDWZVC) are described herein. BDWZVC can be used to generate M-frames, which have multiple reference frames at an encoder and can be forward and backward decodable. For example, optimal Lagrangian multipliers for forward and backward motion estimation can be derived and/or utilized. The optimal Lagrangian multiplier for backward motion estimation can be approximately twice as large as the optimal Lagrangian multiplier for forward motion estimation. Further, an optimal P-frame/M-frame selection scheme can be employed to enhance rate-distortion performance when video is transmitted over an error prone channel. Accordingly, a first frame in a group of pictures (GOP) can be encoded as an I-frame, a next m−1 frames can be encoded as P-frames, and a remaining n−m frames can be encoded as M-frames, where n can be a length of the GOP and m can be optimally identified.
Public/Granted literature
- US20090316783A1 BIDIRECTIONALLY DECODABLE WYNER-ZIV VIDEO CODING Public/Granted day:2009-12-24
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