FA-49754 / PCM sample encoding / Member archive

Pcm adaptive nibble selection: greedy order · case 04

Low weighted adaptive bits consume residual before high bits are considered.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Bounded fixed-step adaptive-nibble PCM encoder: greedy magnitude bits, a half-bin base, and predictor feedback from reconstructed rather than original amplitudes.

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, 1, 11, 3], 6]`	`[[1, 1, 13, 7], 10]`	Failed

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