Patent ID: 11888545
Assignee: CABLE TELEVISION LABORIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 17:
18. A communication system having echo cancellation capability, the communication system comprising:
a digital network configured to communicate signaling within a digital domain;
an analog network configured to communicate signaling in an analog domain; and
a node for interfacing signaling between the digital domain and the analog domain, the node including an echo canceller configured to cancel a reflection received at the node in response to an analog signal previously transmitted therefrom by combining an analog cancellation signal with the reflection, the echo canceller including:
i) an equalizer configured to generate a first digital signal based on an echo expected in response to transmission of the analog signal from the node,
ii) a digital-to-analog (D-A) converter configured to convert the first digital signal to the analog cancellation signal,
iii) a combiner configured to combine the analog cancellation signal with the reflection, and
iv) an analog-to-digital (A-D) converter configured to convert an output from the combiner to a second digital signal.