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Perfecting Protection for Interactive Multimedia
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DOI：10.1109/MSP.2016.2639062.png)
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Abstract
En 中文
Many current and emerging applications require low-latency communication, including interactive voice and video communication, multiplayer gaming, multiperson augmented/ virtual reality, and various Internet of Things (IoT) applications. Forward error correction (FEC) codes for low-delay interactive applications have several characteristics that distinguish them from traditional FEC. The encoding and decoding operations must process a stream of data packets in a sequential fashion. Strict latency constraints limit the use of long block lengths, interleaving, or large buffers. Furthermore, these codes must achieve fast recovery from burst losses and yet be robust to other types of loss patterns. This tutorial article provides a survey of FEC for low-delay interactive applications. We provide several illustrative examples that explain why off-the-shelf codes such as Reed-Solomon (RS) codes, digital fountain codes, or random linear convolutional (RLC) codes do not provide ideal error correction for such applications. We then introduce some recently proposed FEC codes for streaming, discuss their properties, and quantify their performance gains through both illustrative examples and simulations over statistical channel models and real packet traces.
Keywords:
UNEQUAL ERROR PROTECTION
CONVOLUTIONAL-CODES
BLOCKAGE CHANNELS
STREAMING CODES
BURST
TRANSMISSION
VIDEO
DELAY
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