IEC 61909 : 1.0

AUDIO RECORDING - MINIDISC SYSTEM

International Electrotechnical Committee

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FOREWORD
1 General
2 Disc specification
3 Optical stylus
4 Cartridge
5 Address
6 Pregroove modulation (valid only for recordable MD)
7 EFM modulation
8 ACIRC error correction system
9 Sector data structure
10 Audio data
11 Data organization
12 Serial copy management system
13 Shock proof memory system
14 Application rules
Annex A (informative) Recommendations and clarifications for
                      the MD system
      A.1 - Principles of operation
      A.2 - Measurement of the disc reflectivity
      A.3 - Measurement of the optical disc unbalance
      A.4 - Measurement of the groove wobble amplitude
      A.5 - Beat of wobble and groove geometry
      A.6 - Environment operating and storage conditions
      A.7 - Measurement of the optimum recording power Po
      A.8 - Measurement of jitter and signal frequency time
            errors
      A.9 - Local defects
      A.10 - Burst errorsd time error due to mastering or
             recording
      A.11 - Push-pull tracking signal
      A.12 - Noise in push-pull tracking signal
      A.13 - Diagauges for center hole on the disc
      A.14 - Compliance test of the MD cartridge
      A.15 - Area for braille
      A.16 - Long shutter
      A.17 - Extended volume and bend of cartridge
      A.18 - Definition of air cleanliness
      A.19 - Test of impact durability (recordable disc only)
      A.20 - Measurement of the friction force
      A.21 - Label area
      A.22 - Wobble signal leakage into Isum
Figure 1 - Layout of the MD
Figure 2 - MiniDisc possible profile
Figure 3 - HF signal
Figure 4 - Spectral components of the time error versus the
           maximum allowed time error due to mastering or
           recording
Figure 5 - Typical shape of the error signal for tracking
           versus radial position
Figure 6 - Open-loop transfer function of the radial serve
           for an MD-recorder
Figure 7 - Open-loop transfer function of the radial servo
           for tracking measurement
Figure 8 - Operating conditions
Figure 9 - Roughness and irregularity (recordable disc only)
Figure 10 - Optical stylus
Figure 11 - MD cartridge specifications for the premastered
            version
Figure 12 - MD cartridge specifications for the recordable
            version
Figure 13 - Maximum existing area of the disc
Figure 14 - ADIP encoder block diagram
Figure 15 - MD encoding/decoding system (main channel)
Figure 16 - ACIRC encoder (add-on de-interleave + encoder)
Figure 17 - Integrated ACIRC encoder
Figure 18 - ACIRC decoder (CIRC decoder + add-on interleave)
Figure 19 - Integrated ACIRC decoder
Figure 20 - Relation between 16 bit samples and data bytes
Figure 21 - Layout of a data block
Figure 22 - Scrambler structure
Figure 23 - Layout of the sync field
Figure 24 - Layout of the header field
Figure 25 - Sector construction of MD
Figure 28 - Sector structure of MD (general)
Figure 29 - Sector structure of MD (programme area)
Figure 30 - Sector structure of MD (TOC sector = 0
            (mandatory))
Figure 31 - Sector structure of MD (TOC sector = 1 (option))
Figure 32 - Sector structure of MD (TOC sector = 2 (option))
Figure 33 - Sector structure of MD (TOC sector = 3 (option))
Figure 34 - Sector structure of MD (TOC sector = 4 (option))
Figure 35 - Sector structure of MD (UTOC sector = 0
            (mandatory))
Figure 36 - Sector structure of MD (UTOC sector = 1 (option))
Figure 37 - Sector structure of MD (UTOC sector = 2 (option))
Figure 38 - Sector structure of MD (UTOC sector = 4 (option))
Figure 39 - Mapping of JIS code to shifted JIS
Figure 40 - Example of transformation rule
Figure A.1 - Schematic set-up for reflectivity measurements
Figure A.2 - Unbalance versus read out time in a recordable
             MD system
Figure A.3 - Radial error signal
Figure A.4 - Groove wobble
Figure A.5 - Grooves "in phase"
Figure A.6 - Grooves "out of phase"
Figure A.7 - Groove geometry
Figure A.8 - ATER and BLER windows for a wide and deep groove
Figure A.9 - ATER and BLER windows for a narrow and shallow
             groove
Figure A.10 - Cyclic climatic test
Figure A.11 - Recording power (mW) versus block error rate
Figure A.12 - Examples of time errors
Figure A.13 - Diagauge
Figure A.14 - Disc base
Figure A.15 - Measurement method
Figure A.16 - Test gauge
Figure A.17 - Test method (4-forces)
Figure A.18 - Test method (3-forces)
Figure A.19 - The area for braille
Figure A.20 - Extended volume and bend of cartridge
Figure A.21 - Number of particles
Figure A.22 - Test of impact durability
Figure A.23 - Arrangement of head and disc for the measurement
              of friction force
Figure A.24 - Label area
Figure A.25 - Wobble signal leakage
Table 1 - ASCII - Code table
Table 2 - 6 bit format
Table 3 - Modified ISO 8859-1 code table for the minidisc
          system
Table 4 - JIS code table for minidisc system (see JISX0208
          except for MD external characters in Table 5)
Table 5 - Contents of MD external characters
Table 6 - Caption of illustrated characters
Table 7 - The translation between the Roman alphabet and
          Japanese katakana
Table 8 - Recording rule

Abstract

Applicable to the MiniDisc, this standard specifies the electrical and mechanical characteristics necessary to ensure the interchangeability of both optical and pre-mastered discs and recordable magneto-optical discs of 64 mm diameter for the compressed digital audio recording system.