A network-based CODEC includes an echo canceler. An example apparatus might include a first group of memory cells coupled to a first access line and configured to store a dividend element. The maximum anode voltage of the projection tube is set to equal to or more than 25 kV and the maximum beam current is set to equal to or more than 4 mA . The data zone includes the audio titles each having an audio title set information followed by a plurality of contiguous audio objects.