This Recommendation is intended to assist in measuring the characteristics of studio digital video equipment with analogue input/output. When measuring analogue characteristics such as signal-to-noise ratio (S/N), differential gaidphase (DG/DP), and the luminance non-linearity of the equipment, the quantization error of the coding process causes variations in the results of the measurement. Considering the SIN of 8-bit video equipment, for example, the measured S/N shows some number within 50 dB and 70 dB when using a conventional method with a noise meter. To solve these problems, the Broadcasting Technology Association of Japan (BTA), has organized a Working Group to study new measurement methods for digital video equipment with analogue input/output. Similar work has been carried out in the United Kingdom.
ITU-R BT.1204 FRENCH-1995 history
1995ITU-R BT.1204 FRENCH-1995 Measuring methods for digital video equipment with analogue input/output