IEC 61146-4 : 1.0

VIDEO CAMERAS (PAL/SECAM/NTSC) - METHODS OF MEASUREMENT - PART 4: AUTOMATIC FUNCTIONS OF VIDEO CAMERAS AND CAMERA-RECORDERS

International Electrotechnical Committee

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FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Conditions
    4.1 Environmental conditions
    4.2 Conditions of measurement
          4.2.1 Illumination
          4.2.2 Shooting conditions
          4.2.3 Settings of the equipment under test
          4.2.4 Reliability of measured results
5 Method of measurement of automatic functions
    5.1 Automatic exposure control
          5.1.1 Dependency of illumination level
          5.1.2 Dependency on average brightness
          5.1.3 Dynamic response
    5.2 Automatic focusing
          5.2.1 Assessment of focusing response time
          5.2.2 Focusing accuracy
    5.3 Automatic white balance
          5.3.1 Dependency of colour temperature of
                  illumination
          5.3.2 Dynamic characteristics of automatic white
                  balance
Annex A (normative) Specification of the tracking chart
Figures
1 Equipment arrangement for measurement of dependency on
    illumination level
2 Equipment arrangement for measurement of dependency on
    average brightness
3 Waveform of a horizontal line for -B = 27%
4 Waveform of a horizontal line for -B = 77%
5 Waveform of a horizontal line for -B = 9%
6 Typical response (1)
7 Typical response (2)
8 Equipment arrangement for measurement of focusing time
9 Equipment arrangement for measurement of automatic
    white balance
10 Colour temperature conversion block and its specification
    A.1 Dimensional specification of the large-sized tracking
          chart
Tables
1 Automatic exposure control - Dependency on illumination
    level
2 Automatic exposure control - dependency on average
    brightness
3 Automatic focusing - Assessment of focusing response time
4 Automatic white balance - Dependency on colour temperature
    of illumination
5 Optical filters used for conversion of colour temperature
    A.1 Positions of equi-centred small circles and triangle
          markers

Abstract

Applicable to the assessing of automatic function characteristics implemented in colour video cameras and camera-recorders. Limited to automatic functions relative to light input from the lens and to the electronic output from video cameras and the video camera portions of camera-recorders.