Robust foreground/background filtering control for acoustic echo cancellation
US-2025159083-A1 · May 15, 2025 · US
using two adaptive filters, e.g. for near end and for end echo cancelling
using two adaptive filters, e.g. for near end and for end echo cancelling · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04B3/237 |
| Official title | {using two adaptive filters, e.g. for near end and for end echo cancelling} |
| Display label | using two adaptive filters, e.g. for near end and for end echo cancelling |
| Total patents | 56 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 12 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ethernet physical layer transceiver with non-linear neural network equalizers
US-12166595-B2 · Dec 10, 2024 · US
Method and apparatus for training a full-duplex communication link
US-11843483-B2 · Dec 12, 2023 · US
Method and Apparatus for Training a Full-Duplex Communication Link
US-2022247603-A1 · Aug 4, 2022 · US
Ethernet physical layer transceiver with non-linear neural network equalizers
US-2022239510-A1 · Jul 28, 2022 · US
Distributed dynamic power savings for adaptive filters in a high-speed data channel
US-11310084-B2 · Apr 19, 2022 · US
Distributed dynamic power savings for adaptive filters in a high-speed data channel
US-2021218606-A1 · Jul 15, 2021 · US
Frequency domain adaptation with dynamic step size adjustment based on analysis of statistic of adaptive filter coefficient movement
US-10984778-B2 · Apr 20, 2021 · US
Frequency domain adaptation with dynamic step size adjustment based on analysis of statistic of adaptive filter coefficient movement
US-2021020157-A1 · Jan 21, 2021 · US
Echo cancellation in a multiport data transceiver
US-10826559-B2 · Nov 3, 2020 · US
Acoustic echo cancellation with room change detection
US-10790874-B2 · Sep 29, 2020 · US
Transmission device and system
US-10623032-B2 · Apr 14, 2020 · US
Acoustic echo cancellation with room change detection
US-2020091963-A1 · Mar 19, 2020 · US
Echo canceller device and voice telecommunications device
US-10498389-B2 · Dec 3, 2019 · US
Echo cancellation in a multiport data transceiver
US-2019356353-A1 · Nov 21, 2019 · US
Cloud-based acoustic echo canceller
US-10439673-B2 · Oct 8, 2019 · US
Carrier frequency offset estimation device and carrier frequency offset estimation method
US-2019273532-A1 · Sep 5, 2019 · US
Method and system for full duplex enhanced audio
US-10382092-B2 · Aug 13, 2019 · US
Transmission device and system
US-2019215022-A1 · Jul 11, 2019 · US
Cloud-based acoustic echo canceller
US-2019181911-A1 · Jun 13, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04B3/237?
- CPC H04B3/237 is the Cooperative Patent Classification code for “using two adaptive filters, e.g. for near end and for end echo cancelling.”
- How many patents are filed under CPC H04B3/237 (using two adaptive filters, e.g. for near end and for end echo cancelling)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC H04B3/237 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).