FA-91352 / Digital signal filters / Member archive

Streaming FIR correlates instead of convolving · case 02

An asymmetric impulse response comes out time-reversed.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Input [taps, blocks] of integers. Filter the concatenated stream with y[n] = sum_k taps[k] x[n-k] (zero initial history) while processing block by block; return the outputs grouped per input block.

Why this case matters

Block-based FIR processing must carry history across buffer boundaries or every block edge glitches.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: random stream 0	`[[9, 21, 9], [16], [34, 24, 17], []]`	`[[9, 15, 7], [28], [24, 20, 19], []]`	Failed

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