FA-49798 / PCM sample encoding / Member archive

Pcm two tap predictor: prediction division · case 03

Dividing predictor terms separately changes integer rounding.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Stipulated two-history adaptive PCM decoder with explicit integer predictor coefficients, floor divisor, signed residual nibble and fixed residual amplitude 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	`[[5, 3, -15, -11], -11, -15]`	`[[6, 5, -12, -7], -7, -12]`	Failed

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