FA-50144 / PCM sample encoding / Member archive

Pcm lpc residual reconstruction: history age order · case 04

LPC coefficients see oldest-first PCM history instead of newest-first.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Reconstruct bounded integer PCM LPC residuals using newest-first history, floor-divided complete dot products and reconstructed-sample history feedback.

Why this case matters

Offline PCM interchange uses these exact bounded packet and sample representation decisions.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
oracle 1	`[[0, 8, -9], [-9, 8]]`	`[[6, 11, 15], [15, 11]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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