Abstract: Request and response messages conforming to a protocol such as Media Gateway Control Protocol (MGCP) between media gateways and a media gateway controller (MGC) are examined to enable them to be correlated. The correlated messages are assembled to produce a call detail record (CDR) describing a voice or data call established over an IP network via the media gateways under the control of the MGC.

Abstract: Request and response messages conforming to Media Gateway Control Protocol (MGCP) between media gateways 12 and 16 and a media gateway controller (MGC) 22 are examined to enable them to be correlated. The correlated messages are assembled to produce a call detail record (CDR) describing a voice or data call established over an IP network via the media gateways under the control of the MGC.

Abstract: The present invention relates to converting a video signal comprising input image samples conforming to an interlace scanning lattice into a video signal comprising output image samples conforming to a progressive scanning lattice. First and second temporal filters receive and divide the input image samples into first and second temporal sub-bands. First and second low-pass vertical filters vertically filter each temporal sub-band such that the higher temporal sub-band is vertically filtered to a greater degree than the lower temporal sub-band. The filtered image samples from each sub-band are combined to form a filter output signal and a re-sampler re-samples the filter output signal to form the output image samples.