IEC 62122 : 1.0

METHODS OF MEASUREMENT FOR CONSUMER-USE DIGITAL VTRS - ELECTRONIC AND MECHANICAL PERFORMANCES

International Electrotechnical Committee

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FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Measuring conditions
   4.1 General
   4.2 Environmental conditions
   4.3 Power supply
   4.4 Test signal
        4.4.1 Video test signal
        4.4.2 Colour bar signal
        4.4.3 Video input signal for measuring audio
               characteristics
   4.5 Measuring instruments
        4.5.1 Noise meter
        4.5.2 Audio signal generator
        4.5.3 Audio level meter
        4.5.4 Audio mixed frequency oscillator
        4.5.5 Audio harmonic distortion meter
   4.6 Video test tape
5 Methods of measurement for mechanical characteristics
   5.1 General
   5.2 Tape speed
        5.2.1 Test signal
        5.2.2 Measurement
        5.2.3 Presentation of the results
   5.3 Flatness of the RF envelope
        5.3.1 Test signal
        5.3.2 Block diagram
        5.3.3 Measurement
        5.3.4 Presentation of the result
   5.4 Linearity
        5.4.1 Test signal
        5.4.2 Measurement
        5.4.3 Presentation of the results
   5.5 Effective area starting position
        5.5.1 Test signal
        5.5.2 Measurement
        5.5.3 Presentation of the results
   5.6 Track displacement measurement by image processing
        5.6.1 Measurement system
        5.6.2 Image processing technique
        5.6.3 Measuring results
6 Video characteristics (analogue input/output)
   6.1 General
   6.2 Luminance amplitude frequency response
        6.2.1 Test signal
        6.2.2 Block diagram
        6.2.3 Measurement
        6.2.4 Presentation of results
   6.3 Chrominance amplitude frequency response
        6.3.1 Test signal
        6.3.2 Block diagram
        6.3.3 Measurement
        6.3.4 Presentation of results
   6.4 Luminance diagonal resolution
   6.5 Luminance frequency characteristics of diagonal
        resolution (i)
   6.6 Luminance frequency characteristics of diagonal
        resolution (ii)
   6.7 Luminance non-linear distortion
   6.8 Luminance waveform distortion (linear distortion)
   6.9 Chrominance waveform distortion
        6.9.1 Test signal
        6.9.2 Block diagram
        6.9.3 Measurement
        6.9.4 Presentation of results
   6.10 Luminance vertical waveform distortion
   6.11 Chrominance vertical waveform distortion
   6.12 Automatic Gain Control (AGC) operation
   6.13 Chrominance to luminance horizontal displacement
   6.14 Chrominance to luminance vertical displacement
   6.15 Luminance signal-to-noise ratio
        6.15.1 General
        6.15.2 Test signal
        6.15.3 Block diagram
        6.15.4 Measurement
        6.15.5 Presentation of the results
   6.16 Chrominance signal-to-noise ratio
        6.16.1 General
        6.16.2 Test signal
        6.16.3 Block diagram
        6.16.4 Measurement
        6.16.5 Presentation of the results
7 Composite signal decoding characteristics (luminance
   and chrominance separation)
   7.1 Luminance signal separation (general)
   7.2 Luminance signal separation at colour change points
   7.3 Chrominance signal separation
   7.4 Chrominance signal separation with three dimensional
        processing
        7.4.1 Test signal
        7.4.2 Block diagram
        7.4.3 Measurement
        7.4.4 Presentation of results
   7.5 Luminance signal separation with three dimensional
        signal processing
        7.5.1 Test signal
        7.5.2 Block diagram
        7.5.3 Measurement
        7.5.4 Presentation of results
8 Audio characteristics (analogue input/output)
   8.1 General
   8.2 Audio operational output voltage (with AGC)
        8.2.1 Test signal
        8.2.2 Block diagram
        8.2.3 Measurement
        8.2.4 Presentation of results
   8.3 Audio operational input voltage (without AGC)
        8.3.1 Test signal
        8.3.2 Block diagram
        8.3.3 Measurement
        8.3.4 Presentation of results
   8.4 Audio maximum output voltage
        8.4.1 Test signal
        8.4.2 Block diagram
        8.4.3 Measurement
        8.4.4 Presentation of results
   8.5 Amplitude frequency response
        8.5.1 Test signal
        8.5.2 Measurement
   8.6 Phase difference between channels
        8.6.1 Test signal
        8.6.2 Measurement
        8.6.3 Presentation of results
   8.7 Signal-to-noise ratio
   8.8 Dynamic range
        8.8.1 Test signal
        8.8.2 Measurement
        8.8.3 Presentation of results
   8.9 Harmonic distortion
   8.10 Inter-modulation distortion
        8.10.1 Test signal
        8.10.2 Measurement
        8.10.3 Presentation of result
   8.11 Channel separation
        8.11.1 Test signals
        8.11.2 Measurement
        8.11.3 Presentation of results
   8.12 Wow-flutter
   8.13 Pitch difference between record and playback
        8.13.1 Test signal
        8.13.2 Measurement
        8.13.3 Presentation of results
9 Classification of the characteristics to be specified
Annex A (informative) Error rate
   A.1 Definition
   A.2 Block diagram
   A.3 Measurement
   A.4 Presentation of the results
   A.5 Example 1
   A.6 Example 2
Bibliography
Figures
Tables

Abstract

Defines the basic measurement methods for evaluating the electronic and mechanical performance of consumer-use digital VTRs. Also enables checks of the interchangeability and characteristics of the equipment under test and enables evaluation of the quality of image and sound.