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Essentials of AV Technology Introduction to AV Systems

Essentials of AV Technology Introduction to AV Systems. Part One Introduction to AV Systems. AV Systems Essentials. You will learn about: What defines a system Why systems are important The purpose of a system Active and passive systems Where AV systems can be found

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Essentials of AV Technology Introduction to AV Systems

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  1. Essentials of AV TechnologyIntroduction to AV Systems

  2. Part OneIntroduction to AV Systems

  3. AV Systems Essentials • You will learn about: • What defines a system • Why systems are important • The purpose of a system • Active and passive systems • Where AV systems can be found • Types of AV systems • How an AV system is created • Ergonomics • Subsystems

  4. AV System Applications • Defining an AV system • AV systems Usage

  5. AV Systems Goals • Communicate and share • Meet an objective

  6. Overview of AV System Creation • Wants and Needs • Design • Install • Support • Allied trades

  7. Active and Passive Systems • Active Systems • - Lighting, audio, projection • Passive systems • -Wall coverings, furniture, screens

  8. AV Subsystems An AV system can include several subsystems • Stand Alone • Support of objective • Multiple subsystems that supports larger system  Subsystems are only a small part of a larger complete system.

  9. AV Systems Summary • You have now learned about systems in general. The topics you have covered in this section are: • What defines a system • Examples of where AV systems can be found • Types of AV systems • Why AV systems are important • The purpose of an AV system • The overview for creating an AV system • AV allied trades • Active and passive systems • The definition of a subsystem • Indicators of subsystems

  10. Part TwoAnalog and Digital Signals

  11. Analog and Digital Signals Introduction • This section will cover: • Analog and Digital Signals • Waveforms • Digital Signal Processing and Sampling • Bit Depth of a Digital Signal • Bit Rate

  12. Analog and Digital Signals • Analog: continuous waveform • always varying states • Digital: "On (1)" and "Off (0)" positions only • 2 states Analog Digital

  13. Waveforms Analog Waveform Digital Waveform

  14. Digital Signal Processing and Sampling

  15. Bit Depth of a Digital Signal Bit Depth: The number of states in which to describe the sampled voltage level. 4-bit grayscale: a 4-bit pixel has 16 potential shades

  16. Bit Rate • Bit Rate: Quantity of information over time in a digital signal stream

  17. Signal Compression • Reduces file size • Codecs

  18. Digital Formats Containers: • File structure • Defines how data is arranged • MOV, AVI, WMV, MPEG-2 Codecs: • Compression algorithms • Compression/DECompression

  19. Lossless and Lossy Compression • Lossless: Same as original • Lossy: Approximation of original data

  20. Noise and Signal Transmission • Analog signal-to-noise ratio affected • Digital signals more resistant

  21. Amplifiers and Signal Transmission • Analog - signal to noise ratio affected • Digital - signals more resistant to noise

  22. Analog and Digital Signal Considerations Analog Recordings • Duplicating of continuous signals • Short lifetime • Short lifetime Digital Recordings • Duplicating list of numbers • Long lifetime • Copies are equal quality

  23. Analog and Digital Signals Summary • Representation of digital data • Sampling rate vs. digital signal accuracy • Bit depth determines precision • Digital video file formats • Lossless and lossy compression • Analog recordings and the duplication process • Digital recording advantages

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