Recovering data (e.g., closed captioning data, teletext data) encoded in television signals. A line encoding the data is over-sampled. The resulting samples are examined to determine the average number of samples spanning the low and high values in a run-in period. The average numbers are used to determine...http://www.google.de/patents/US6839091?utm_source=gb-gplus-sharePatent US6839091 - Recovering data encoded in television signals
