1. IT2032PAContent Management System (CMS) Nitec in Social Media & Web Technology

2. CMS Content UpdatingIn this chapter, you will learn:o Define what is digital videoo Identify the various video format and theircharacteristicso Describe the advantages and disadvantages ofthe various formats across platforms.o Define what is digital audioo Identify the various sound formats and itscharacteristics 3. VideoVideo is stream of data composed ofdiscrete frames, usually including bothaudio and pictureso US TV Signal = 30 fpso European stations = 15 fpso Movies = 24 fps 4. VideoAnalog Videoo It is the representation of information byvariable physical quantities such as the sizeof electrical voltages. 5. Video Digital Videoo is a sheet of dots, called pixels, each holdingcolour value. 6. VideoVideo File FormatFilePlatform PurposeExtension.MOVMac, Win Macs* Once the movie isQuickTime compressed,theVideo viewer must have the.AVIMac, Win Microsoftssame compressor toAudio Video play it back.Interleaved 7. VideoVideo File FormatFilePlatform PurposeExtension.MPEG Mac, Win, MPEG Video * Once the movie isUnix Mac may compressed, the have problem viewer must have the with the audio same compressor to track play it back. 8. VideoVideo File FormatFilePlatform PurposeExtension.ASFMac, Win Microsoft Both .RM and .ASF streaming compressionis formatintended to produce a low data rate : may discard data as well as compress it, which is important for streaming used for distribution only 9. VideoVideo File FormatFilePlatform PurposeExtension.RM Mac, Win, Used by Both .RM and .ASFUnix RealNetworks compression is streaming intended to produce a low data rate : may discard data as well as compress it, which is important for streaming used for distribution only 10. VideoCross PlatformDynamic Data Exchange (DDE)o allows data to be transmitted between clientand a servero Hot link and/or cold link 11. VideoCross PlatformObject Linking and Embedding (OLE)o Lets you embed or link data objects createdin different OS appo An embedded object becomes a part of thefile into which it is pastedo A linked object is changed automatically inwhen the original file is updated 12. Video CompressionLossless compressiono The simplest form of digital video compressiontakes advantage of spatial redundancy i.eareas of single picture that are the same.Lossy Compressiono information is removed permanently. 13. Video CompressionAdvantages of compressiono smaller amount of storage is neededo compression allows highly miniaturizedequipment for consumer and professionalso compression reduces the bandwidth neededo allows faster-than-real-time transfer betweenmedia.