Wavelet-based image sequence coding for transmission over HF-channels

The authors propose a new combined source-channel coding framework. They introduce a new source codec, which follows a multiresolution concept facilitating a decoding at variable spatial resolutions. This property can be used for a source-encoder controlled UEP. Dependent upon the importance of the actual part of image information, the source encoder tells the channel encoder which grade of error protection is to apply. Furthermore, using this strategy it is possible to adapt the protection strength to the channel state. The new channel codec was designed for digital channels with memory.