4. Pulse or digital communications
  5. Multilevel

Qu Jin

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Sub-band echo canceller using optimum wavelet packets and cross-

Pulse or digital communications – Multilevel
Patent

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Zero-delay structure for sub-band echo cancellation

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

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Profile ID: LFUS-PAI-P-1255720

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