I.S. EN 60856:1993

FOREWORD
PREFACE
INTRODUCTION
SECTION ONE - GENERAL
1 Scope
2 Object
3 Standard atmospheric conditions for testing
SECTION TWO - DISK PARAMETERS
4 Mechanical parameters
5 Optical requirements
6 Temperature and humidity requirements
SECTION THREE - RECORDED PARAMETERS
7 Audio parameters
   7.1 Channel applications
   7.2 Audio subcarrier modulation of main carrier
8 Audio subcarrier frequencies
   8.1 Type of modulation
   8.2 Polarity of modulation
   8.3 Pre-emphasis
   8.4 Audio compression
9 Video parameters
   9.1 Video signal
   9.2 Video signal modulation
10 Vertical interval control and address signals
   10.1 24-bit biphase coded signal
SECTION FOUR - OPERATIONAL SIGNALS
11 Definition of playback measurement system
   11.1 Optical stylus
   11.2 Measuring set-up
   11.3 General measurement conditions
12 Operational parameters
   12.1 Radial signal
   12.2 Tangential signal
   12.3 High-frequency signal
13 Implementation of a digital audio signal
   13.1 Signal modulation
   13.2 Sample frequency
   13.3 Compensation of time delay
   13.4 Analogue audio subcarriers
   13.5 Control and display of the compact disk
        system (subcode)
Figures
APPENDIX A - List of abbreviations
APPENDIX B - Audio compression system
APPENDIX C - Programme status code

Applicable to pre-recorded optical reflective videodisks compatible with 50 Hz/625 lines CCIR monochrome and colour coding PAL systems, and defines those parameters that effect the interchangeability of the disks, excluding limitations of the programming material and source.