Canon XL1 3CCD Manual

A SERVICE OF

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FEATURESOFCOMPRESSION

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‐Theratiosbetweendataratesusedforauthoringvideoandfordistributingcompressedvideoscan

behuge.Essentiallycompressingavideoistakingawayfromtheoriginalvideoandoftenonlysmall

percentagesoftheoriginalvideodataremain.

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‐Inaddition,differenttypesofcompressedvideomayvaryinbitrate.

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‐Videoformatisdistinctfromcompressiontype:i.e.onevideoformatmaysupportmultiple

compressiontypesandratios,andatypeofcompressionmaybeusedinmultipleformats.Butmost

standardvideoformatsincluderequirementsthatspecifycompressiontypesanddatarates.

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DVDFORMATS

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‐Extremelypopularformat

‐WithtechnologicaldevelopmentsDVDcapacitiesareincreasing

‐ADVDthatplaysinaDVDplayer=aDVD‐Video

‐Onethatplaysinacomputer=DVD‐ROM(specificallycomputer‐formatteddisc

‐HybridDVD‐Video/DVD‐ROMdiscsallowforboth

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‐DVD‐Videodiscs=masteredinNationalTelevisionSystemCommittee(NTSC)formatorPhase

AlternatingLine(PAL)format

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VideoCDFORMATS

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‐Olderdisc‐basedformat

‐LowercompressionandhigherresolutionratiothanDVD=lowerquality

‐Canplayinmostdevices