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Multimedia System Zainal A. Hasibuan
Acknowledgment ,[object Object]
Covered Topics ,[object Object],[object Object],[object Object],[object Object],[object Object]
Multimedia System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is Multimedia? media that uses multiple forms of information content and information processing to inform or entertain the (user) audience.[ Wikipedia ] Text  Audio  Image  Animation  Video  Interactivity
What  is multimedia? ,[object Object]
What is Multimedia? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Discrete and Continuous Media ,[object Object],[object Object],[object Object],[object Object]
Discrete and Continuous Media Natural  Sound Video Still  Images Synthetic Sound Animation Text Graphics Continous Discrete Captured  (from real world) Synthesized  (by computer)
Delivery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Software  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Digital Media ,[object Object],[object Object]
[object Object],[object Object]
Digital Media Bits Each 0 or 1 is called a  bit . Bit is an abbreviation of the expression BInary digit, which is derived from the  binary number system. Table 1.1 Example of Bits  0 1 bit 1 1 bit 0110 4 bit 01101011 8 bit
Digital Media Binary Number System   The binary number system is made up of digits. Compare with decimal system (10 digit system), decimal system uses digits 0 through 9, the binary system only uses digits 0 and 1.  Table 1.2 Decimal System and Binary System  Number in Decimal System Representation in Binary Number System 0 0 2 10 3 11 8 1000
Digital Media ,[object Object],[object Object],[object Object],[object Object]
Digital Media ,[object Object],[object Object],[object Object],[object Object],[object Object]
Data Types in MM system Text Data   ASCII stands for American Standard Code for Information Interchange. Computers can only understand numbers, so an ASCII code is the numerical representation of a character.
Text Data Figure 2.1 ASCII table and description (copyright: www.asciitable.com)
Text Data ASCII uses 7 bits to represent a character. As a result only 127 characters are defined as standard ASCII characters. Characters 128-255 are called extended ASCII characters (Figure 2.2).   Figure 2.2 Extended ASCII codes (copyright: www.asciitable.com)
Text Data EBCDIC EBCDIC (Extended Binary Coded Decimal Interchange Code) is a character set used on early IBM computers. EBCDIC was first introduced in 1965, it was the new character-coding scheme came with IBM System 360 series. EBCDIC uses 8 bits to represent a character.
Text Data UNICODE The Unicode character uses 16 bits to represent a character, thus more than 65000 characters can be represented. While 65000 characters are sufficient for encoding most of the many thousands of characters used in major languages of the world.
Sound Data Sound Data A typical compact disc can hold up to 74 minutes of 16 bit, 44.1 kHz audio that is uncompressed – about 650 megabytes .
Sound Data Table 2.1 shows how the size of a file is affected by the sampling rate and bit length. The file is a one-minute sound clip, recorded and saved in various forms in the Microsoft Windows WAV file format.   Table 2.1 Variation of file size and sampling rate (60 seconds audio clip in MS WAV format) Quality Sampling Rate Resolution File Size CD 44 kHz 16 bit Stereo 10.3 MB 44 kHz 8 bit Stereo 5.18 MB FM Radio 22 kHz 16 bit Stereo 5.18 MB 22 kHz 8 bit Stereo 2.59 MB AM Radio 11 kHz 16 bit Stereo 2.59 MB 11 kHz 8 bit Stereo 1.29 MB
Image Data Image Data Images, or pictures, are two-dimensional arrays of data called bitmaps, with each element is called  pixel .
Image Data ,[object Object],[object Object],[object Object],Table 2.2 Color Depths   Color Depth Number of Colors 4 bits 16 8 bits 256 16 bits 65,536 24 bits 16,777,216
Video Data ,[object Object],[object Object],[object Object]
Nature of  Digital D ocument ,[object Object],[object Object],[object Object],[object Object]
Quality of Service (QoS) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Quality of Service (QoS) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Why compression? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Lossless & Lossy Compression ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sample Word Frequency Data (from B. Croft, UMass)
Zipf and Term Weighting ,[object Object]
Summary  ,[object Object],[object Object]

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Multimedia System

  • 2.
  • 3.
  • 4.
  • 5. What is Multimedia? media that uses multiple forms of information content and information processing to inform or entertain the (user) audience.[ Wikipedia ] Text Audio Image Animation Video Interactivity
  • 6.
  • 7.
  • 8.
  • 9. Discrete and Continuous Media Natural Sound Video Still Images Synthetic Sound Animation Text Graphics Continous Discrete Captured (from real world) Synthesized (by computer)
  • 10.
  • 11.
  • 12.
  • 13.
  • 14. Digital Media Bits Each 0 or 1 is called a bit . Bit is an abbreviation of the expression BInary digit, which is derived from the binary number system. Table 1.1 Example of Bits 0 1 bit 1 1 bit 0110 4 bit 01101011 8 bit
  • 15. Digital Media Binary Number System The binary number system is made up of digits. Compare with decimal system (10 digit system), decimal system uses digits 0 through 9, the binary system only uses digits 0 and 1. Table 1.2 Decimal System and Binary System Number in Decimal System Representation in Binary Number System 0 0 2 10 3 11 8 1000
  • 16.
  • 17.
  • 18. Data Types in MM system Text Data ASCII stands for American Standard Code for Information Interchange. Computers can only understand numbers, so an ASCII code is the numerical representation of a character.
  • 19. Text Data Figure 2.1 ASCII table and description (copyright: www.asciitable.com)
  • 20. Text Data ASCII uses 7 bits to represent a character. As a result only 127 characters are defined as standard ASCII characters. Characters 128-255 are called extended ASCII characters (Figure 2.2). Figure 2.2 Extended ASCII codes (copyright: www.asciitable.com)
  • 21. Text Data EBCDIC EBCDIC (Extended Binary Coded Decimal Interchange Code) is a character set used on early IBM computers. EBCDIC was first introduced in 1965, it was the new character-coding scheme came with IBM System 360 series. EBCDIC uses 8 bits to represent a character.
  • 22. Text Data UNICODE The Unicode character uses 16 bits to represent a character, thus more than 65000 characters can be represented. While 65000 characters are sufficient for encoding most of the many thousands of characters used in major languages of the world.
  • 23. Sound Data Sound Data A typical compact disc can hold up to 74 minutes of 16 bit, 44.1 kHz audio that is uncompressed – about 650 megabytes .
  • 24. Sound Data Table 2.1 shows how the size of a file is affected by the sampling rate and bit length. The file is a one-minute sound clip, recorded and saved in various forms in the Microsoft Windows WAV file format. Table 2.1 Variation of file size and sampling rate (60 seconds audio clip in MS WAV format) Quality Sampling Rate Resolution File Size CD 44 kHz 16 bit Stereo 10.3 MB 44 kHz 8 bit Stereo 5.18 MB FM Radio 22 kHz 16 bit Stereo 5.18 MB 22 kHz 8 bit Stereo 2.59 MB AM Radio 11 kHz 16 bit Stereo 2.59 MB 11 kHz 8 bit Stereo 1.29 MB
  • 25. Image Data Image Data Images, or pictures, are two-dimensional arrays of data called bitmaps, with each element is called pixel .
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33. Sample Word Frequency Data (from B. Croft, UMass)
  • 34.
  • 35.