Path selection using available bandwidth estimation in overlay-based video streaming
Computer Networks: The International Journal of Computer and Telecommunications Networking
Path selection using available bandwidth estimation in overlay-based video streaming
NETWORKING'07 Proceedings of the 6th international IFIP-TC6 conference on Ad Hoc and sensor networks, wireless networks, next generation internet
Performance study of an image restoration algorithm for bursty mobile satellite channels
ISCIS'05 Proceedings of the 20th international conference on Computer and Information Sciences
Using reversible variable length codes for JPEG image transmission in a noisy channel
Analog Integrated Circuits and Signal Processing
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We present an algorithm to conceal bit errors in still images and image sequences that are coded using the discrete cosine transform (DCT) and variable length codes (VLCs). No modification is necessary to an existing encoder, and no additional bit rate is required. The concealment algorithm is kept simple so that real-time decoding and concealment is possible. A single bit error in these images can cause a block to split into several blocks or several blocks to merge into one. This causes the DCT coefficients of all subsequent blocks to be correctly decoded but stored in the wrong location in the image. Furthermore, the DC coefficient of all subsequent blocks may be incorrect. The error concealment algorithm uses transform domain information to identify the location of the affected blocks and to correct errors. The image quality after error concealment is shown to be significantly improved