| 摘要 |
In one embodiment systems and methods are utilized that eliminate synchronization between cycles of a repetitive communication network quality test. This is accomplished by time-shifting each sample transmission to compensate for the time shift due to communication network delay and asymmetrical operation of network testers. In one embodiment, a dual-tone multi-frequency (DTMF) stamped sample signal is used to obtain an accounting of the time-shift that is necessary for each cycle. Once the necessary time-shift is determined, a time-shift alignment calibration (TSAC) and real-time auto-TSAC is used to implement continuous voice/video quality evaluations.
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