Pioneer PDV-20 Operating Instructions Manual

Also see for PDV-20: Manual Service manual

Contents

07 Additional Information66EnGlossaryAnalog audioAn electrical signal that directly representssound. Compare this to digital audio,which can also be an electrical signal, butis an indirect representation of sound. Seealso Digital audio.Aspect ratioThe width of a TV screen relative to itsheight. Conventional TVs are 4:3 (in otherwords, the screen is almost square);widescreen models are 16:9 (the screen isalmost twice as wide as it is high).Chapter (DVD only)Just as a book is divided up into severalchapters, a title on a DVD disc is usuallysplit into chapters. See also Title.Digital audioAn indirect representation of sound bynumbers. During recording, the sound ismeasured at discrete intervals (44,100times a second for CD audio) by an analog-to-digital converter, generating a stream ofnumbers. On playback, a digital-to-analogconverter generates an analog signal basedon these numbers. See also Samplingfrequency and Analog audio.Dolby Digital (DVD only)A surround sound system developed byDolby Laboratories containing up to sixchannels of digital audio (front left andright, surround left and right, center andlow-frequency channels). See also DTS.DTSA surround sound system developed byDigital Theater Systems as an alternative toDolby Digital. DTS discs contain up to eightchannels of digital audio. See also DolbyDigital.Dynamic rangeThe difference between the quietest andloudest sounds possible in an audio signal(without distorting or getting lost in noise).Dolby Digital and DTS soundtracks arecapable of a very wide dynamic range,delivering dramatic cinema-like effects.MPEG videoThe video format used for Video CDs andDVDs. Video CD uses the older MPEG-1standard, while DVD uses the newer andmuch better quality MPEG-2 standard.