Digital speech transmission systems use source coding to reduce the bit rate and channel coding to correct transmission errors. Furthermore, in periods of a very poor channel quality error concealment of residual bit errors becomes necessary as channel decoding fails. However, if the channel is clear, channel coding would not be required at all and the speech quality could be improved by allowi...

Methods like edge directed interpolation and projection onto convex sets (POCS) that are widely used for image error concealment to produce better image quality are complex in nature and also time consuming. Moreover, those methods are not suitable for real time error concealment where the decoder may not have sufficient computation power or done in online. In this paper, we propose a data-hidi...

In many communication occasions, packet loss or data corruption often occurs. Data incompleteness results in video degradation, which greatly affect visual quality. Error concealment is needed for the robustness of video transmission. In this paper, we introduce a local binary pattern guided bilateral spatial error concealment. In the computation of local search window, neighboring local binary...

As users of RCT results, we must understand the potential for humans to interject bias. By describing assessments of allocation concealment and blinding, abstracts included in Evidence-Based Nursing will help readers to discern those trials that have made superior efforts to minimise bias. Judging the quality of allocation concealment and blinding reflects current empirical research and reflect...

We provide an economic analysis of the incentives created by an antitrust leniency program, with particular attention to incentives created for effort directed at the concealment of collusion. The results point to a need for competition authorities to consider the effects of concealment when evaluating economic evidence of collusion. The results also suggest possible benefits from increasing pe...

We propose a method for the concealment of frame erasures in packet switched speech communication systems such as Voice over IP that is particularly tailored to the case of wireless transmission. At the receiver, the concealment algorithm is assisted by specific side information that is communicated via a steganographic channel within the bitstream of the employed speech codec. An exemplary imp...

Real-time video streaming over the Internet requires robust delivery mechanisms with low overhead. Traditional error control schemes are not attractive because they either add redundant information that may worsen network traffic, or rely solely on the inadequate capability of the decoder to do error concealment. As sophisticated concealment techniques cannot be employed in a real-time software...

Fujitsu’s MB86H06 set-top box (STB) chip is a high-density chip featuring high-performance, superior error concealment, robust audio-video (AV) synchronization, and low cost. It comprises a QFP256 package with DDR2 memory and supports a two-layer printed circuit board (PCB) layout for a low bill of material (BOM) cost. It is widely used in the China terrestrial television broadcasting (CTTB) ma...

In this paper, we propose an object-based error-concealment technique for MPEG-2 video transmitted in a burst-packet-loss environment. A burst packet loss typically impairs consecutive slices for the reconstructed picture. The proposed object-based error concealment proceeds in two stages, by intra-picture and inter-picture estimation respectively. In the first stage, regions of the missing are...

The H.264 standard allows each macroblock to have up to sixteen motion vectors, four reference frames, and a macroblock mode. Exploiting this feature, we present an efficient temporal error concealment algorithm for H.264-coded video. The proposed method turns out to show good performance compared with conventional approaches. key words: temporal error concealment, boundary matching algorithm (...