Sony HVR1500A Product Manual (HVE-1500A Operating Manuals) - Page 107

video and digital television transmission, it maintains high image quality while achieving high compression ratios, using predictive techniques for capturing motion. Non-drop frame mode A mode of advancing timecode which ignores the difference in frame values between real time and the timecode. Using this mode produces a difference of approximately 86 seconds per day between real time and timecode, which causes problems when editing programs in units of seconds using the number of frames as a reference. Non-linear editing Editing while playing back video and audio signals recorded on hard disks. Video scenes stored on disk can be cued up quickly, for increased editing efficiency. See also "Linear editing." PCM audio This is an audio signal represented by pulse code modulation. The analog audio signal is first broken down into a sequence of pulses, and these are then represented digitally. Preroll Running of a video tape to a prior to an edit-start point to enable the tape to reach a steady speed and to be synchronized with other video tapes. R-Y signal A chrominance signal determined by subtracting the Y (luminance) signal from the R (red) signal. One of the component signals. Reference video signal A video signal consisting of a sync signal or sync and burst signals, used as a reference. RP188 Specifications by the American Society of Motion Picture and Television Engineers (SMPTE) for transmitting control codes and timecode in the ancillary data space of digital television signals SD-SDI signal SD Serial Digital Interface. An interface standardized as SMPTE 259M which enables the transmission of an uncompressed digital component stream. Setup (59.94i) The difference between the reference black level and the blanking level of a composite signal. SMPTE Abbreviation of Society of Motion Picture and Television Engineers, a professional association established in the USA. S/N Signal-to-Noise ratio. The relation of the strength of the desired signal to the accompanying electronic interference, the noise. If S/N is high, sounds are reproduced with less noise and pictures are reproduced clearly without snow. Search mode A VCR operating mode used when searching for specific scenes, by viewing the video output or timecode values while playing back the tape at various speeds in forward or reverse direction. Servo lock Synchronizing the drum rotation phase and tape transport phase with a reference signal during playback and recording so that the video heads scan the tape in the same pattern during playback and recording. Standby Off mode One of two conditions in the stop mode. The drum does not rotate and tape is slackened. There is no damage to the video heads and the tape, but the VCR is not ready for immediate recording or playback. Standby on mode One of two conditions in the stop mode. The drum is rotating and the tape is wrapped round the drum. The VCR is ready for recording or playback, so a still picture can be obtained. Subcarrier A sine wave imposed on the luminance portion of a video signal and modulated to carry color information. Its amplitude represents color saturation and its phase represents hue. Superimpose To put a set of characters onto a picture so that both can be seen at the same time. Squeeze Method of down-converting a 16:9 HD signal to 4:3 video by compressing the image horizontally. S-video A signal format in which Y (luminance) and C (chrominance) signals are separated to reduce interference between them so that noiseless images are reproduced. Sync signal A reference signal consisting of vertical and horizontal sync signals used for synchronizing the scanning patterns of the video camera and the monitor. TBC Abbreviation of Time Base Corrector. Electronic circuits to electrically stabilize the playback signals by removing color variation and roll in the playback picture caused by irregularity in drum rotation and tape movement. Time Appendix Glossary 107