When errors are introduced into a compressed image or video bitstream, blocks of pixels are lost. The decoder attempts to conceal this loss to maximize displayed picture quality. We discuss a few different conditions under which satisfactory interpolation of the missing blocks is possible. For images, these conditions include situations where the image is locally smooth or locally one dimension...

A novel strategy for error concealment of digital images is proposed in this paper, which is implemented by adopting the data hiding technique. Different from all the existing data hiding algorithms, the hidden data in our strategy is extracted from the host data, and then is embedded back into the host itself. Such a host signal with redundancy is proved to be robust when transmitted in the er...

In this paper packet loss error concealment for video sequences compressed using spatial scalability is investigated. Slice support is implemented into the JSVM reference codec of the scalable extension to H.264/AVC video coding standard. The nonnormative error concealment scheme introduced in the codec is developed further, adding to it the capability to also consider correctly received slice ...

One of the oldest theories of animal camouflage predicts that apparently conspicuous markings enhance concealment. Such 'distraction' marks are hypothesized to work by drawing the viewer's attention away from salient features, such as the body outline, that would otherwise reveal the animal. If distraction marks enhance concealment, then they offer a route for animals to combine camouflage mark...

A low complexity spatial-domain error concealment method is proposed to reconstruct still images and intracoded (I) frames in video when they are transmitted through unreliable channels in this work. The proposed concealment algorithm works with the following steps. First, missing edges in a lost macroblock (MB) are detected and recovered using gradient data. Then, the lost MB is implicitly div...

In this paper, we propose an Error Concealment algorithm for INTRA-frame losses over packet loss channels. The novelty is that not only the INTRA-frame but also the subsequent INTER-frames are error concealed. We use the received INTRA-MBs to refine their neighbors based on the strong correlation between adjacent pixel values. In addition, Motion Compensation is used to reconstruct the INTER-pi...

Data lost in the form of dropped packets is a major obstacle to actualizing real time Internet video via modem connection with frame rates as high as 30 frames per second. Error concealment (EC) techniques must restore the lost data. Due to rigid system speci cations of this application, only the computationally simplest error concealment methods are plausible. Replication, which is the simples...