- Back to main F.A.Q: Real Audio and Video
- 1. Can I stream Real Audio and Video.
- 2. Where can I find more about Real
- 3. General Information on Real Audio.
- 1. Can I stream Real Audio and Video. -
- Yes you can stream real audio and video with any
Below a few samples
AMERICA, brought to you by
American Star Airlines at: http://www.americanstarair.com/
here for A 56k MODEM
here for DSL/Cable
Lighthouse Steel Drum Band
Brought to you by http://hopetownlighthouse.com/
Notice! These above presentation requires the use of the real
player which may be downloaded here for free at
the above real
player link button. Once you reach the site, click where it
says "RealPlayer 8 Basic beta is our free player.
- 2. Where can I find more about Real Audio. -
Real Audio Help
Search Real Audio Knowledge Base
- 3. General Information on Real Audio. -
- The following information contains general information
RealAudio. Specific questions about its features and functions
should be addressed to firstname.lastname@example.org.
What is RealAudio?
RealAudio refers to a client-server based system which allows
web sites to deliver (or "stream") pre-recorded and live
compressed audio data to multimedia computers with a RealAudio
The Player continuously decompresses the audio stream and plays
real time, on demand. Unique flow control technology allows computer
users with sound cards to listen to whole clips, or just sections,
when they want, as often as they want.
Not counting the player, the system has two components, the
RealAudio Encoder and the RealAudio Server.
The encoder is a software only solution (no proprietary hardware
required) and is used to
convert the live or prerecorded content into the RealAudio or
RealVideo formats. The 3.0 Encoder will encode .wav, .au and live
raw audio data including sound from CD players, tuners, microphones
and mixing boards. Download RealAudio Encoder from:
RealAudio 3.0 features broadcast quality audio over the Internet
the first time. RealAudio 3.0 technology introduces stereo sound
28.8 Kbps modem users. Version 3.0 also introduces scaleable bandwidths
between 28.8 Kbps connections and ISDN connections and above,
near CD quality sound at ISDN connections and beyond. Content
can select from multiple codecs at the same bandwidths to enable
customize RealAudio sound for different content types.
The delivery system has been enhanced by improving the communication
reliability with Robust UDP and other features designed to improve
quality, including PerfectPlay (with the RealAudio Player Plus)
Bandwidth Negotiation. Download a RealAudio 3.0 Server license
How Does the System Work?
RealAudio technology utilizes an interactive system between the
Server and the RealAudio Player to enable real-time audio delivery
the Internet. When the user clicks on a link on a Web page, the
buffers and then begins to play, all within a few seconds. This
the deceiving impression that the RealAudio file is linked directly
Web page. In reality, information is passing between the Web server
supporting the Web page, the RealAudio Server supporting the audio
and the RealAudio Player. When the user clicks on the RealAudio
it is actually activating a metafile, which in turn sends the
of the RealAudio file to the Player. The Player then sends a signal
RealAudio Server requesting that file. The file is sent to the
and played as it is received. The entire process is completed
How Does One Deliver Live Content?
The RealAudio and Video system will allow you to stream prerecorded
on demand from your web pages. It will also allow streaming of
in realtime. Real-time encoding and serving technology allows
to broadcast live events including breaking news stories, sporting
corporate meetings, and more, live, as they're happening, without
In a live situation, the RealAudio or video encoder must be connected
Real server so that the incoming audio or video can be compressed
Real format and be streamed over the internet (or intranet). Clearly,
assumes you'll need two machines...one for the encoder and one
for the server.
Generally, when doing live encoding, the encoder should be run
on its own
dedicated machine! Additionally, the encoder may be at a remote
apart from the server (perhaps at the live event or radio station
or it may be on the same network as the RealAudio/Video server.
where the RA/RV encoder will be remote you may send the newly
stream from the RA encoder to the RA/RV server simply by specifying
destination of the server. The stream will then be sent over the
via TCP/IP to be received by the server...and then multiplied
out to the listners. When the encoder is remote, you can send
the stream to the
a dedicated internet connection (min. 56kbs or 64k ISDN)
The experienced audio technician may seek professional results
with a number of different techniques including compression, noise
equalization and normalization equipment. A list of such equipment
as other hints for getting the best sound with RealAudio can be
What are the Memory and Sound Requirements?
The RealAudio server allows you to freely stream your live content
saving it to hard disk, thus making for a maintenance free system
fill your hard drive with large files on a daily basis. However,
instances you may want to archive live content for play back at
a later time.
The RealAudio server provides such an option.
Depending upon the level of audio compression, RealAudio files
require hard disk space
equal to approximately 1.1 - 2.4 kilobytes per second of audio.
RealAudio will encode most common monaural PC formats. RealAudio
2.0 comes with two
audio encoding algorithms. The RealAudio 14.4 algorithm provides
AM sound quality, while
the 28.8 algorithm offers FM sound quality.
EXAMPLES OF AUDIO FILE STORAGE REQUIREMENTS:
Program length RealAudio RealAudio
14.4 kbps 28.8 kbps
1 hour 3.6 MB 8MB
5 hours 18 MB 40MB
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