| 摘要 |
An improvement to a telephone system using a Digital Subscriber Loop (DSL). A second broadband-data signal, which may be a computer signal, a television signal, or other broadband or video signal, is encoded, for overlaying the first broadband-data signal, in one of four or more bands. The encoding multiplies the second broadband-data signal by an encoding signal. The encoding signal typically includes a Walsh function. The encoded-second broadband-data signal is transmitted, at a respective carrier frequency for one of the four or more bands, over a DSL communications channel. At a remote subscriber unit, the encoded-second broadband-data signal is decoded. A respective replica of the encoding signal, as used for the encoding, decodes the encoded-second broadband-data signal. The decoded-second broadband-data signal is converted to the second broadband-data signal.
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