Patent ID: 7043749
Filing Date: 2006-05-09
Classification: H04L,H04N,H04Q

Abstract:
1. A method of calibrating a network gateway in order to synchronize audible and visible outputs from a multimedia terminal comprising an audio communication device and a separate video communication device, when the signal to the audio device, and optionally also the signal to the video device, is/are routed through a network gateway that imposes an intrinsic gateway processing delay on at least one signal routed through the gateway, comprising the steps of: i) providing an audio signal and a video signal; ii) supplying as an input to the gateway the audio signal and optionally also the video signal so that said signal(s) is/are routed through the gateway to the multimedia terminal; iii) detecting any mismatch in the synchronization between the audible and visible outputs from the audio device and the video device owing at least partly to the intrinsic gateway processing delay(s); iv) adjusting a variable delay in the gateway on a signal routed through the gateway until the audible and visible outputs from the separate devices are effectively synchronized; and, v) storing the variable delay in the gateway for future use.