BBC Research and Development Report Number 02 pdf

BBC Research and Development Report Number 02

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R&D Report 1974-02 : An experimental investigation of test-noise signals for the measurement of non-linear distortion of sound signals R.A. Belcher Ideally it should be possible to estimate by an objective measurement the degree of programme quality impairment caused by non-linearity. The report describes investigations into the correlation between objective measurements of distortion and subjective assessments of programme impairment, using circuits where non-linearity increases with programme signal level. A proposal is given for a method of distortion measurement which uses a test signal formed from pseudo-random noise. This type of measurement, referred to as a noise-separation test, gives better correlation with subjective assessments than the total harmonic distortion test used at present

• Date: 1974
• Year: 1974
• Book Topics/Themes: distortion, impairment, test, subjective, circuit, circuits, programme, signal, measured, tests, critical programme, signal level, test signal, harmonic distortion, subjective impairment, programme signal, distortion products, subjective tests, total harmonic, test conditions

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