Error resilience and concealment in embedded zerotree wavelet codecs

Abstract

In ATM networks cell loss or channel errors can cause data to be dropped in the channel. When digital imagedvideo are transmitted over these networks one must be able to reconstruct the missing data so that the impact of the errors is minimized. In this paper we overview the problem of using EZW encoders in channels where data-loss is possible. We also describe an error resilience scheme based on unequal error protection and data interleaving that addresses the problem of using rate scalable encoders over ATM networks.

Comparison of video protection methods for wireless networks

“…Moreover, error resilient entropy code (EREC) offers good performance over noisy channels [30,43]. However, wavelets [47], multiple description coding (MDC) [32] as well as steganography, i.e. embedding error correcting information into the video signal [45], have been used for video protection.…”

<title>Investigation of robust video streaming using a wavelet-based rate-scalable codec</title>

“…Finally, error concealment is a postprocessing technique which masks errors by estimating the missing data. 15,16 We may classify FEC into channel coding, source-based coding, and joint source/channel coding. The latter two methods use the structure of the compressed bit stream to prioritize those bits which would allow the best reconstruction if errors occur.…”

<title>Evaluation of color-embedded wavelet image compression techniques</title>

“…The decoder's decisions are always synchronized to those of the encoder, making this algorithm highly sensitive to transmission errors [26]. …”