Overview
ISO/IEC 16449:2002 - Information technology - 80 mm DVD - Read-only disk defines the mechanical, physical and optical characteristics of the 80 mm read-only optical disk (commonly called an 80 mm DVD or mini DVD) to enable interchange between disks and drives. The standard specifies signal quality, data format, recording method, error correction and coding, and environmental and conformance requirements. It covers four disk Types (single- and dual-layer, one- and two-sided) with nominal capacities: Type A 1.46 Gbytes, Type B 2.92 Gbytes, Type C 2.66 Gbytes, Type D 5.32 Gbytes. Together with standards for volume and file structure, ISO/IEC 16449:2002 supports full data interchange across data-processing systems.
Key Topics
- Disk Types and constructions: Four defined Types (A–D), single-layer (SL) and dual-layer (DL) configurations, one- and two-sided variants, substrate/adhesive/spacer descriptions.
- Mechanical & dimensional requirements: Overall dimensions, clamping zone, runout (axial/radial), mass, moment of inertia and dynamic imbalance to ensure mechanical interchangeability.
- Optical & physical properties: Substrate thickness, refractive index, birefringence, reflectivity and entrance-surface definitions for reliable readout.
- Data format & recording: Track geometry, physical sectors, data frames, modulation (8-to-16 RLL based), ECC blocks, scrambling, EDC/IED and error-correction (Reed–Solomon) schemes.
- Signal & servo requirements: High-frequency signal amplitude/asymmetry, jitter limits, cross-track and tangential push–pull signals, differential phase tracking.
- Environmental & conformance criteria: Specified test, operating and storage environments (e.g., operating temperature range −25 °C to 70 °C; storage −20 °C to 50 °C), transportation and conditioning requirements.
- Normative annexes: Measurement methods (jitter, birefringence, reflectance), Burst Cutting Area (BCA), Source Identification Code (SID) and guidance on disk bonding and clamping.
Applications and Users
ISO/IEC 16449:2002 is practical for:
- Optical media manufacturers producing 80 mm DVD-ROMs to ensure interoperability and conformance.
- Drive and pick-up head designers implementing mechanical, optical and servo interfaces.
- Quality assurance and test labs performing dimensional, optical and signal measurements against normative methods.
- Software/content distributors and archivists relying on reliable read-only mini-DVD interchange for small-form-factor distribution and archival media.
- System integrators and hardware OEMs specifying compatibility for devices that read mini DVDs.
Adopting this standard ensures consistent media production, reliable data interchange between drives, and predictable performance across environments.
Related Standards
- ISO/IEC standards for volume and file structure (to achieve full data interchange)
- IEC 60950-1 (referenced for safety requirements)
- ECMA-268 (original equivalent standard)
Keywords: ISO/IEC 16449:2002, 80 mm DVD, mini DVD, read-only disk, DVD-ROM, optical disk standard, data format, error correction, mechanical characteristics, media interchange.