Transmission of analog and digital information across a single line
AssigneeCanon Kabushiki Kaisha
InventorDirk Hughes-Hartogs
Life of this patent
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Abstract
Apparatus for sending and receiving both analog and digital information from a single information transmission medium. The apparatus includes a core processor (200), including a digital signal processor (DSP) (212) or a CPU/DSP, in communication with an integrated services digital network (ISDN) interface (204). The core processor (200) also may be in communication with a personal computer (PC) (202). The invention also is directed to a related method, including a series of modules.
Claims7
Digital apparatus for sending and receiving analog and digital information to and from a single information transmission medium, said apparatus comprising:
- A. an integrated services digital network ISDN interface coupled to the transmission medium, the ISDN interface including at least a first connection and a second independent connection;
- and
- B. coupled to the ISDN interface, a digital signal processor DSP not containing any codecs and comprising:
- means for distinguishing, in real time, a first data type associated with the transmission medium at the first connection and a second data type concurrently associated with the transmission medium at the second connection;
- and
- means for coupling:
- a) a direct digital representation of voltage associated with one of said data types and
- b) one of the connections.
Dependencies are inferred from the claim text.