Novel error concealment method with adaptive prediction of abrupt and gradual scene changes

Abstract

In this paper, the impact of the scene change on the conventional error concealment method is addressed and a novel error concealment method is proposed to improve the insufficiency of conventional temporal error concealment algorithm due to the occurrence of scene change. Combining with the low complexity scene change detection algorithm using macroblock type information, the corrupt blocks resulting from bit errors are concealed either temporally or spatially depending on whether or not an abrupt scene change is found. In the case of gradual scene change, a novel error concealment method of interpolation and extrapolation is proposed to utilize the linear property of gradual scene change sequence, and effectively reduce the concealment error in comparison with the conventional algorithm. Great improvement about 3 to 5 dB PSNR in average and 6 to 8 dB in some cases is obtained with very little overhead memory and computation.

The Application of Fast and Effective Shot Boundary Detection Algorithm in Mechanical Engineering

“…In order to achieve effective and efficient motion estimation and compensation inside digital videos, MPEG arranged video sequences into group of pictures (GoP), for which the structure of such arrangement can be illustrated in Fig 1 [5].…”

“…By using equation (5), examine MARMNn to see if the frame sequences detection process should be activated or not. Following satisfaction of equation ( 5), then frame n is abrupt scene change frame.…”

“…Otherwise, carry on equation (4) to calculation the new MARMN. Likewise, by using equation (5) to see if the n+1 frame belongs to the abrupt frames or not.…”

“…Kobla et al [3] provided a detailed analysis of MPEG compressed domain, which abrupt scene change detection is proposed via exploiting the MPEG motion estimation and compensation scheme. Earlier attempt for abrupt scene change detection in compressed domain was reported in [4], where Meng et al used motion vectors, I frame and P frame DC images to detect abrupt Soo propose abrupt and gradual scene change detection in compressed using the macroblock type information [5]. In [6], Jinhui proposed an abrupt scene change detection system based on graph partition model.…”

A new technique for minimizing network loss from users’ perspective

“…Further, this approach only provides a limited level of video reconstruction ability at the receiver end. Techniques used in this approach include Forward Error Correction (FEC) (Wu et al, 2003) and Error Concealment (Wang and Zhu, 1998;Pei and Chou, 2004). differ among different video streams.…”