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Research of Error Concealment Based on Motion Vector

Author: ZhangLiang
Tutor: LiuYanLong
School: Taiyuan University of Technology
Course: Signal and Information Systems
Keywords: H.264 Digital Video Error concealment Motion vector recovery
CLC: TN919.81
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
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Abstract


With the rapid growth of the Internet and wireless networks , network video services are becoming more and more popular . Video coding standard development is often used to transmit video in a limited bandwidth , such as MPEG -2 / 4 , H.263 and H.264 . These video coding standards typically using a discrete cosine transform, and the motion estimation / motion compensation , such as variable-length encoding technique . These techniques is the use of space , time and the statistical redundancy for data compression . However, the high compression rate of the video easily during the transmission error has occurred. When the decoding error macro block , these errors will with the space and time propagation , leading to a decline in visual quality . The recovery of the motion vector is well - known video communications error concealment method, by error data around the location of the information available to restore the motion information of the compressed video . Detailed study over the past 20 years in some classic error concealment based on motion vector recovery algorithm , and detailed analysis of the most popular , the most simple , efficient and widely used motion vector recovery method . The motion vector analysis method sometimes domain alternative method , the boundary matching method , Lagrange interpolation , polynomial interpolation . Also detail the experimental analysis and comparison , given the specific simulation results , as well as real-time video streaming test environment . In theory , this paper proposed a the H.264 Inter decoding error concealment algorithm to remove the impact of the errors on the human visual system . The experimental results show that the proposed algorithm with other time-domain error concealment method can get better results . The proposed algorithm can be applied to real-time multimedia communication system based on the H.264 video coding standard .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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