4. Telephonic communications
  5. Subscriber line or transmission line interface
  6. Network interface device

David S. Farrell

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Echo canceller employing dual-H architecture having variable ada

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Echo canceller employing dual-H architecture having variable...

Telephonic communications – Echo cancellation or suppression – Combined diverse function
Reexamination Certificate

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Echo canceller employing dual-H architecture having variable...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
Reexamination Certificate

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Echo canceller having improved non-linear processor

Telephonic communications – Echo cancellation or suppression – Residual echo cancellation
Reexamination Certificate

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Echo canceller having improved non-linear processor

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-910067

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