| 摘要 |
Retraining of modems communicating data signals as voice signals via gateways over a packet network, such as a VoIP network, that does not communicate the sample clock of the transmitter to the receiver is eliminated by monitoring the buffer level in a receiving gateway, and adjusting the local clock as a function thereof, so that the long term average of the rate of incoming samples to the buffer is equal to the long term average rate of the codec clock which is used to clock samples out of the receiver buffer. Advantageously, there is no need to communicate clock synchronization information between the transmit and receive gateways. Further advantageously, only one gateway on the connection requires the functionality of the instant invention to be implemented therein.
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