FA-50207 / PCM sample encoding / Member archive

Pcm warmup lpc packet: linear predictor · case 02

Second-order PCM prediction sums history rather than extrapolating slope.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Decode fixed-order PCM packets with exactly one or two chronological warmup samples, followed by residuals for hold or linear-extrapolation prediction.

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	`[[1, 3, 4, 8, 11], [4, 2, 7, 9]]`	`[[1, 3, 5, 8, 10], [4, 2, 1, 0]]`	Failed

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

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