Mining the IPTV Channel Change Event Stream to Discover Insight and Detect Ads

Figure 1

Channel changes in time with labeled ad segments. The interval in the chart represents 30 minutes (with each bar representing 10 seconds) on June 20, 2015, from 23:22 to 23:52. The height of the bars of either color represents the number of channel changes by all of the observed viewers on the channel; red color highlights the periods with labeled ads, as provided by the broadcasting company. A significant time lag is noted due to misaligned timestamps, which have to be adjusted before the training phase begins.