Title :
A new PCM codec test method with reduced real-time and signal processing requirements
Author :
Hanrahan, H.E. ; Cronje, B. ; Riphagen, I.
Author_Institution :
Dept. of Electr. Eng., Univ. of the Witwatersrand, Johannesburg, South Africa
fDate :
9/11/1992 12:00:00 AM
Abstract :
A new test method is described which allows full gain and SNR curves to be measured within 2s with better than 0.1 dB signal level spacing. A transposed test configuration avoids the need for analog test signal generation. An exponentially windowed tone is the test signal. The entire gain and SNR versus signal level curves are derived from one stimulation. Reference curves for the new test signal for A-Law codecs resemble smoothed versions of those of CCITT Method 2
Keywords :
codecs; electric noise measurement; electronic equipment testing; gain measurement; pulse-code modulation links; PCM codec test method; SNR; exponentially windowed tone; gain; transposed test configuration; Analog integrated circuits; Codecs; Costs; Decoding; Distortion measurement; Gain measurement; ISDN; Phase change materials; Signal processing; Testing;
Conference_Titel :
Communications and Signal Processing, 1992. COMSIG '92., Proceedings of the 1992 South African Symposium on
Conference_Location :
Cape Town
Print_ISBN :
0-7803-0807-7
DOI :
10.1109/COMSIG.1992.274307
