Changes between Version 5 and Version 6 of MeasuringSoundLatency


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Timestamp:
Jul 28, 2008 12:41:36 PM (11 years ago)
Author:
bennylp
Comment:

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  • MeasuringSoundLatency

    v5 v6  
    6464[[Image(rec1.PNG, 50%)]] 
    6565 
    66 The highlighted area in above picture shows one recording of both original signal and the echo. 
     66The highlighted area in above picture shows one cycle of recording of original signal and the echo signal. 
    6767 
    6868If we zoom-in the highlighted area, it will look like this: 
     
    154154Measuring the latency in the recorded WAV file is the same as in the previous test. Here's my {{{rec2.wav}}} looks like in the WAV analyzer: 
    155155 
    156 [[Image(rec2.png, 50%)]]] 
     156[[Image(rec2.png, 50%)]] 
    157157 
    158158And in my measurement, I measured the delay is about 200 milliseconds. This value is only for the first play/echo cycle, and as most buffers in pjmedia are adaptive, the latency may grow or shrink dynamically as time progresses, hence it's probably better to use {{{latency.c}}} to measure the latency in more precise manner.