htmlDemo7 - Tutorial 7 XP Working with Multimedia XP Using...

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1 Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 1 XP Using Multimedia on the Web Enhancing a Web Site with Sound, Video, and Applets Tutorial 7 Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 2 XP Working with Multimedia Bandwidth is a measure of the amount of data that can be sent through a communication pipeline each second. – Consider bandwidth when working with multimedia on a Web site Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 3 XP Working with Multimedia • Multimedia can be added to a Web page two different ways: External media is a sound of video file that’s accessed through a link. Useful for a low bandwidth Inline media is placed within a Web page as an embedded object Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 4 XP Working with Audio • Every sound wave is composed of two components: Amplitude - the height of the wave. Amplitude relates to the sound’s volume (the higher the amplitude, the louder the sound). Frequency - the speed at which the sound wave moves. Frequency relates to sound pitch (high frequencies have high pitches). Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 5 XP Working with Audio Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 6 XP Sampling Rate, Sample Resolution, and Channels • Sound waves are analog functions (represent a continuously varying signal). – To store the information, however, it must be converted to pieces of information. Digital recording measures the sound’s amplitude at discrete moments in time. – Each measurement is called a sample . • Samples per second taken is called the sampling rate
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2 Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 7 XP Sampling Rate Low sampling rate Medium sampling rate High sampling rate Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 8 XP Sampling Rate, Sample Resolution, and Channels Sampling resolution indicates the precision in measuring the sound within each sample. –8-b it – 16-bit – 32-bit Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 9 XP Sample Resolution Low sample resolution High sample resolution Demo 7 Adapted From New Perspectives on HTML and XHTML, Comprehensive Patrick Carey, Course Technology 10 XP Sample Rates and Resolution Sampling rate and sample resolution as related to sound quality: Sampling Rate and Sample Resolution Sound Quality 8 KHz, 8-bit, mono Telephone 22 KHz, 16-bit, stereo Radio
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htmlDemo7 - Tutorial 7 XP Working with Multimedia XP Using...

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