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...

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...

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...

Streaming media applications often suffer from packet losses in wired or wireless IP links. In order to get reasonable degree of quality in case of packet losses, it is necessary to have error concealment tools at the decoder. Even though several research has been done on monoscopic video, very few studies are found in the literature for stereoscopic error concealment. In this paper we propose ...

Compressed video bitstreams are intended for real-time transmission over communication networks. Most of the video coding standards employ the temporal and spatial prediction structure to reduce the transmitted video data. Therefore, the coded video bitstreams are highly sensitive to information loss and channel errors. Even a single bit error can lead to disastrous quality degradation in both ...

Arbitrarily shaped video objects are an important concept in modern video coding methods. The techniques presently used are not based on image elements but rather video objects having an arbitrary shape. In this paper, spatial shape error concealment techniques to be used for object-based image in error-prone environments are proposed. We consider a geometric shape representation consisting of ...

Two hybrid error concealment schemes based on application of forward error control (FEC) coding in combination with passive error concealment techniques to diierent layers of coded data in a video transmission system are evaluated. It is shown that use of passive error concealment schemes alone generally does not provide suucient protection against channel errors, especially in the case of vide...