一种新的PCM编解码器测试方法，降低了实时性和信号处理要求

Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI:10.1109/COMSIG.1992.274307

H. Hanrahan, B. Cronje, I. Riphagen

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引用次数: 0

摘要

本文介绍了一种新的测试方法，可以在小于0.1 dB的信号电平间隔下，在2s内测量出全增益和信噪比曲线。转置的测试配置避免了模拟测试信号生成的需要。一个指数加窗的音调是测试信号。整个增益和信噪比与信号电平的曲线是由一次刺激得出的。A-Law编解码器的新测试信号参考曲线类似于CCITT方法2的平滑版本。

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A new PCM codec test method with reduced real-time and signal processing requirements

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.<>

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Proceedings of the 1992 South African Symposium on Communications and Signal Processing

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