FA-49820 / PCM sample encoding / Member archive

Pcm adaptation table: signed code index · case 05

PCM adaptation table lookup discards a significant nibble index bit.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Apply a stipulated 16-code fixed-point PCM adaptation table sequentially, enforcing a minimum positive amplitude delta and returning continuation scale.

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	`[[17, 40, 35, 83], 83]`	`[[17, 40, 95, 85], 85]`	Failed

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