Lossy Compression Approach to Transmultiplexed Images
Przemysław Sypka, Mariusz Ziółko, Bartosz Ziółko · Proceedings ELMAR-2011 · 2006
The application of image compression methods in transmultiplexer systems is presented. The specific energy distribution in the combined image spectrum makes the standard compression methods, especially these that base on frequency decomposition not efficient. Two cases are described and compared: the compression of combined image and the preliminary compression of input images before transmultiplexing. Wavelet packet decomposition was used to obtain the frequency decomposition of images. Multirate processing involves digital filters that may be used to process images continuously. The results of conducted experiments are presented. The luminance of the transmitted image is calculated using formulae, which include both, upsampling and digital filtering. The combined image can be sent over a single transmission channel