论文标题
自适应关节时空错误隐藏视频通信
Adaptive joint spatio-temporal error concealment for video communication
论文作者
论文摘要
在过去的几年中，视频通信在越来越多的环境中发现了其应用。不幸的是，其中一些是容易出错的，而传输错误引起的阻止损失的风险无处不在。为了减少这些块损失的影响，提出了一种新的时空误差隐藏算法。该算法使用空间和时间信息将信号推送到丢失区域中。外推是分两个步骤进行的，首先进行了初步的时间外推，然后使用丢失块的空间邻域，用于生成原始信号的模型。通过应用空间改进，与未精确的潜在的纯颞外推相比，PSNR的隐藏质量可以显着更高，从而使PSNR的增益高达5.2 dB。
In the past years, video communication has found its application in an increasing number of environments. Unfortunately, some of them are error-prone and the risk of block losses caused by transmission errors is ubiquitous. To reduce the effects of these block losses, a new spatio-temporal error concealment algorithm is presented. The algorithm uses spatial as well as temporal information for extrapolating the signal into the lost areas. The extrapolation is carried out in two steps, first a preliminary temporal extrapolation is performed which then is used to generate a model of the original signal, using the spatial neighborhood of the lost block. By applying the spatial refinement a significantly higher concealment quality can be achieved resulting in a gain of up to 5.2 dB in PSNR compared to the unrefined underlying pure temporal extrapolation.
