Polycom 6.1 user manual Enabling An Individual Stream, In-Band & Out-of-Band Synchronization

For each desired media format and bandwidth speed, enter the Stream URL and HTTP Base URL in the “Stream URL” and “HTTP Base URL” fields, respectively (See Figure 4-75).

Fig. 4-75

Repeat this step for each desired media platform.

4.12.2 Enabling An Individual Stream

After completing the Stream URL and HTTP Base URL fields, select Enable (See Figure 4-76).

Fig. 4-76

Note:

Prior to launching a presentation, it is necessary to make sure that each stream that will be incorporated into the presentation is enabled.

After enabling a stream, it must be decided whether the stream will be delivered “in-band” or “out-of-band.” A detailed discussion of these delivery options is provided in Section 4.12.3 and 4.12.4.

4.12.3 In-Band & Out-of-Band Synchronization

Before completing the “Media Information” page, it is important to decide whether the presentation will be distributed in-band or out-of-band. In-bandsynchronization is a process that binds the streaming media (audio and/or video) with the synchronized, non-streaming content (PowerPoint slides, etc.) at the encoder prior to delivery. Once the content is bound together at the encoder, it is delivered as a single output. The primary benefits of using in-band synchronization are:

•Because the media is embedded together before it is delivered, the non- streaming content will be perfectly synchronized with the streaming media as the media is delivered to the audience

•No encoding time offsets are required because the streaming and non- streaming media are bound at the encoding stage and, therefore, all elements of the presentation will share the same latencies during delivery.

Out-of-bandsynchronization does not bind the streaming media and the non- streaming content at the encoder, but rather, delivers each component of the presentation separately. As a result, the non-streaming media can be manipulated

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