optical-bler · unknown · also CD BLER

CD block error rate (BLER)

CD BLER counts blocks containing detectable errors per second at the input to the C1 decoder.

BLER is measured before correction, unlike E32 errors that remain uncorrectable at the C2 stage [1]. The cited studies use 220 blocks/s as the CD threshold; this is not a count of lost files and must not be applied to DVD PI Sum8 or Blu-ray. Preserve analyzer settings and scan coverage when comparing measurements.

Relations

related

optical-archival, dvd-pi-sum8

Citations

1. Slattery, Lu, Zheng, Byers and Tang. Stability Comparison of Recordable Optical Discs: A Study of Error Rates in Harsh Conditions. J. Res. NIST 109(5), 517-524 (2004), sections 2-4. (accessed 2026-10-15)
2. Hesela: optical-disc lifetime estimates, error thresholds and uncertainty (accessed 2026-10-15)

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