Chapter 89_audio and Video

7/30/2019 Chapter 89_audio and Video

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CHAPTER 8 & 9_ AUDIO & VIDEO

TYPES OF DATA


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Whats the difference between audio and

sound?

Is it the same?

Audio Sound

Is audible; electricalrepresentation of sound,

Vibrations that travelthrough the air or anothermedium and can be heard

when they reach a person's

or animal's ear.


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Audio can be used to enhance the multimediaapplications in number of ways.

Examples; Digital storybook with voice narrator

Animation with sound effects

Talking dictionary Include narration effectively in training and

educational applications.


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Digital Storybook with Voice Narrator


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Animations with Sound Effects


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Talking Dictionary


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Audio on the web pages include backgroundmusic, narration and sound effects

In multimedia website, audio are either: content sound or

ambient sound


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Content sound furnish information(narration, dialogue, music and other sound

that part of the information) Ambient sound reinforce messages and set

the mood (background sounds and specialeffects)


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Audio can be found on the web for:

Hover button sound

Set the mood (background music)

To draw attention (in web banner/advert)

Entertainment (audio/video streaming)


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Sound is described in terms of twocharacteristics:

Frequency (or pitch) Amplitude (or loudness)


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Advantages

1. It can convey meaning, providing an extra

channel of information if the meaning is unclear to a user using visual

information alone, the audio may clarify it.

2. Add a sense of realism

- Sound effects to support movement in animation


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3. Add interest to a presentation program

3. Ease of communication

- Provide audio in step-by-step tutorial will makethe instructions easier to understand


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Disadvantages1. Files can be large

Most media (elements) especially audio have a big file

2. Audio is not memorable For most people, audio is not as memorable as visual

media

3. Need special hardware and software Users must have appropriate hardware and software as

the input and output


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There are 3 types of sound objects thatcan be used in multimedia productions:

waveform audio MIDI sound tracks

MP3 files


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Is the first audio file format developed forthe PC

Waveform format file is .wav Just as video digitizer can be used to grab

any picture a camera can see, waveform

audio digitizers can record any sound youcan hear


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WAV files are defined as lossless, nothinghas been lost.


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MIDI stands for Musical InstrumentDigital Interface.

is an electronic music format

Commonly used for computer keyboardsand other computer-based musical tools MIDI files have a .mid filename extension.


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AIFF stands for Audio Interchange FileFormat

Is Apples Macintosh waveform format


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MP3 stands for MPEG Audio Player 3. Normally a compressed WAV file. MP3 file format is usually small in size. This type of file is used widely over the

internet for others to download due its smallfile size


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Is a software used to manipulte digital audio(record, edit start and stop time, adding

audio effects, mixing tracks) For examples; Adobe Soundbooth, Audacity,

Cool Edit Pro


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Video provides a rich and lively resource formultimedia applications.

There are 4 types of video that you can use asthe objects of links in multimediaapplications: Videotape

Videodisc Digital video

Hypervideo


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The most widespread video medium isvideotape.

Corporations use videotape to provide just-

in-time training, and public libraries havecollections of instructional videotape (stepby step tutorials).


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Is a circular disc that contains both audio andvideo signals recorded in an analog form.


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videodisc became one of the most popular 20th centurymeans of providing video to multimedia applications ineducation, government, and industrial training.

The popularity of videodisc has waned, however, due to theemergence of digital video and DVD.


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Most promising and exciting video storagemedium.

Like waveform audio, digital video is stored in

files on a hard disk, CD-ROM, or DVD. Digital video can be randomly accessed by

frame, letting you play specific clips. High-speed Pentium processors can play full-

screen video without needing any specialhardware installed.


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Stands for Digital Versatile Disc A high-density videodisc that stores large

amounts of data, esp. high-resolution audio-

visual material.


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Or it is called hyperlinked video Hypervideo is a video that contains:

embedded links that allow navigation between

video and other media elements.


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Is used to edit movies or videos (cut, deletescenes & adding effects to videos)

For example Adobe Premier, Final Cut Pro,iMovie and Windows Movie Maker


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There are 3 phases of video developmentprocesses: Pre-production (visualizing and sketching

storyboards, writing the scripts and creating aproduction schedules) Production (shooting the video to get video footage) Post-Production (editing the video)

*Explain the 3 phases*Give one example of video project and suggest

the procedures and steps in developing thevideo project


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PRE-PRODUCTION

Project Information Gathering This is the first step in the process of creating your video. We arrange a

meeting to discuss all the needs for your project. The purpose for this meeting is for a budget to be determined, and to

get our creative team the necessary information to prepare aquotation.

Quotation After careful review of the notes from the initial meeting, we prepare a

quotation based on your needs and goals. Upon approval of the quotation, we proceed through the production.


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PRE-PRODUCTION

Outline and Script Review This is the meeting where you give us all the relevant information you want

included in your video (storyboard, production schedule). Based on the script, all of the needed shots are mapped out before any

shooting begins. This process is best known as storyboarding.


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PRODUCTION

Video Shoot

With our professional cameras and staff, we begin the video shoot.Following the shot list, we capture all of the footage with attentionto creativity and detail.

Narration Recording The narrator that you select records the narration that will enhance

the visuals.


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POST-PRODUCTION

Digital Editing

The editing process begins, following the agreed upon script. We deliver a rough edit for your review. A final edit is created based upon your feedback and creative input.

Mastering and Duplicating The final presentation is mastered onto a digital format. We can then handle any of your duplication needs for videocassettes,

CD-ROM or DVD.


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Video provides a rich and lively resource formultimedia applications.

The usage of videos on the Web are: Online training programs (for staff orientation)

Video demonstrations of complex procedures andequipments

Sell products and services for online advertising


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Make sure the sound or music and the video match orcomplement one another

Use high-quality video footage, that lends credibility and aprofessional feel to your Web site

Coordinate your video files to complement the graphic, animationand sound elements used on the Web site

Do not overuse transition

Trim footage that is excessive, boring or inconsistent with yourpurpose

Properly place and time video clips so that they are consistentwith the other media content

Documents

Chapter 89_audio and Video