Cisco 2000, Руководство пользователя

Страница: 25 / 145

I
NTRODUCTION
Simple Guide to Streaming Audio and Video Types
The Cisco Digital Media Encoder 2000 can create several different types of audio and video streams.
Although all are a type of IP video format, each has certain properties that make it more attuned to a
specific streaming video application. The Cisco Digital Media Encoder 2000 was designed for
creating video content in a reduced resolution to allow the content to be streamed across the Internet
to be played back on a computer or a handheld mobile device.
The following chart lists all formats supported by the Cisco Digital Media Encoder 2000 with
suggested application uses. All of these formats can be used for many different applications.
IP Video Compression for Streaming in Full Resolution & Lower
Windows Media
®
Streaming Internet video and mobile devices
RealVideo
®
/Helix
®
Streaming Internet video and mobile devices
MPEG-4 Streaming Internet video and mobile devices
In choosing the right streaming format for your needs, you should first consider the audience to
which you will be sending your content. What is the most common player they will have available to
watch your content? This will determine the format of the stream you will create for your audience.
To determine the data rate you will stream your content; you will need to determine the IP
bandwidth to which your audience has access.
For example, if the access method uses an ISDN connection or less, then you would stream your
video and/or audio at a low data rate such as QCIF at 56kbps. If the access is much greater like a
Cisco Digital Media Encoder 2000 User Guide
13