A cost-efficient digital CATV network to improve signal quality, provide reliability, and offer the ability to meet demands for interactive services is described. Analog or digital video downstream channels are converted to a digital format by a digital headend transmitter. Relatively costly error-encoding...http://www.google.de/patents/US7984474?utm_source=gb-gplus-sharePatent US7984474 - Method and apparatus for a digitized CATV network for bundled services
