A high speed software modem is described which uses a selectable, desirable portion of the total available bandwidth of a transmission channel. In a preferred embodiment, the invention is implemented in a personal computer connected to an upstream transceiver through a channel supporting an Asymmetric...http://www.google.com/patents/US6128335?utm_source=gb-gplus-sharePatent US6128335 - Software rate adaptable modem with forward compatible and expandable functionality and method of operation
