FA-49860 / PCM sample encoding / Member archive
Pcm mulaw code selection: polarity code · case 05
Companded PCM polarity bit uses the inverse convention.
Case contract
Bounded mu-law-style selection model: clamp magnitude32635, add bias132, select segment and mantissa then complement the full eight-bit code.
Why this case matters
Offline PCM interchange uses these exact bounded packet and sample representation decisions.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| oracle 1 | [127, 127, 255, 114, 242] | [255, 255, 127, 242, 114] | Failed |
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