Why architecture matters here

Beamforming fails on wrong array geometry + missed calibration. Architecture matters because array + algorithm + DSP compose.

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The architecture: every piece explained

The top strip is core. Mic array. Delay-and-sum. Adaptive beamformer. DOA estimation.

The middle row is enhancement. Noise suppression. Echo cancellation. Wake word integration. Speech enhancement.

The lower rows are ops. Latency budget. Metrics. Ops — hardware + calibration + eval.

Microphone beamforming — delay-and-sum + adaptive + MVDR + noise + integrationspatially focus on the speakerMic arrayN mics + geometryDelay-and-sumalign + sumAdaptive beamformerMVDR / GSCDOA estimationsteer beamNoise suppressionpost-processingEcho cancellationAECWake word integrationalways-onSpeech enhancementcombine with DNNLatency budgetreal-timeMetricsSNR + STOI + WER downstreamOps — hardware + calibration + evalcleancancelintegrateboostbudgetmeasuremeasureoperateoperate
Microphone beamforming: array → delay-and-sum → adaptive.
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End-to-end flow

End-to-end: 4-mic linear array. DOA estimates 30 degrees. MVDR beamforms to null noise. AEC cancels far-end echo. DNN enhances speech. Wake word runs. Latency 20ms. SNR + STOI improved 8 dB.