A Data-Reuse Semi-Blind Source Separation Approach for Nonlinear Acoustic Echo Cancellation
Bibliographic record
Abstract
Nonlinear acoustic echo cancellation (NAEC) is of significant importance in acoustic telecommunication. To improve NAEC performance in the double-talk case, semi-blind source separation-based NAEC (SBSS-NAEC) algorithms have been proposed. However, to deal with reverberation and loudspeaker nonlinearities, convolutive transfer function (CTF) models and power series expansions are employed, which significantly increase the number of free parameters and consequently lead to slow convergence speed and, hence, limited performance. In this paper, we introduce the data-reuse strategy, well-known in the adaptive filter literature, into an SBSS-NAEC framework and propose two algorithms: data-reuse iteration projection (DR-IP) and data-reuse element-wise iterative source steering (DR-EISS). Several simulations demonstrate the superiority of the proposed methods, especially the tracking capability when the impulse response changes.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".