FA-48979 / PCM sample encoding / Member archive

Mulaw expansion: segment bias · case 04

The segment shift is applied only to bias, not mantissa.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Decode eight-bit mu-law codewords using complement, three-bit segment, four-bit mantissa and reconstruction bias132; return signed integer PCM 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	`[0, 0, -16884, 16884]`	`[0, 0, -32124, 32124]`	Failed

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