ically hertz (Hz) which is used to measure cycles or oscillations per second. frequency interleaving The process of putting hue and color saturation information into the vacant frequency spectrum via a process of offsetting that chrominance spectrum exactly SO that its harmonics are made to fall precisely between the harmonics of the luminance signal. frequency Modulation FM. A method of passing information by altering the frequency of the carrier signal. front porch With reference to a composite video signal, the front porch is the portion of the signal that occurs between the end of the active video on each horizontal scan line and the beginning of the horizontal synch pulse. full-motion video Generally refers to broadcast-quality video transmissions in which the frame rate is 30 per second in North American and Japan and 25 per second in Europe. - G - Green, as in RGB. The G signal sometimes includes synchronization information. G.711 CCITT Recommendation entitled, "Pulse Code Modulation (PCM) of Voice Frequencies." G.711 defines how a 3.1 kHz audio signal is encoded at 64 Kbps using Pulse Code Modulation (PCM) and either mu-law (US and Japan) or A-law (Europe) companding. G.721 CCITT Recommendation that defines how a 3.1 kHz audio signal is encoded at 32 Kbps using Adaptive Differential Pulse Code Modulation (ADPCM). Glossary of Terms G.722 CCITT Recommendation that defines how a 7.5 kHz audio signal is encoded at a data rate of 64 Kbps. G.723 ITU-T Recommendation entitled, "Dual Rate Speech Coder for Multimedia Communications Transmitting at 5.3 and 6.4 Kbps." G.723 is part of the H.323 and H.324 families G.728 ITU-T Recommendation for audio encoding using Low Delay Code Excited Linear Prediction (CELP). The bandwidth of the analog audio signal is 3.4 kHz whereas after coding and compression the digitized signal requires a bandwidth of 16 Kbps. G.729 Coding of speech at 8 Kbps/s using conjugate- structure algebraic-code-excited linear-prediction (CS-ACELP). Part of the ITU-T's H.323 standard for videoconfere