FA-50248 / PCM sample encoding / Member archive

Pcm biphase mark generation: payload transition · case 03

Payload transition convention is inverted.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Encode PCM transport payload bits as stipulated biphase-mark half-cells with mandatory boundary transitions and explicit initial/final physical levels.

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	`[[[1, 0], [1, 1], [0, 1], [0, 0]], 0]`	`[[[1, 1], [0, 1], [0, 0], [1, 0]], 0]`	Failed

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