FA-50150 / PCM sample encoding / Member archive

Pcm lpc residual reconstruction: sum before division · case 05

Per-tap rounding changes the integer LPC prediction.

Member previewVariant 5 · 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 2	`[[-1, -1, -4], [-4, -1]]`	`[[-1, -1, -3], [-3, -1]]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.