FA-49962 / PCM sample encoding / Member archive

Pcm companding segment code: magnitude selection · case 02

Negative amplitudes cannot advance through magnitude segments.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Encode bounded PCM magnitude into an explicitly stipulated piecewise companding table: sign sideband, selected lower-bound segment and shifted residual mantissa.

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	`[[true, 0, 0], [true, 0, 0], [false, 0, 0], [false, 1, 0], [false, 2, 0]]`	`[[true, 2, 0], [true, 1, 0], [false, 0, 0], [false, 1, 0], [false, 2, 0]]`	Failed

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