Cisco Headend System Release 2.5 用户指南

1-6 

Introducing Cisco’s OCAP Object Carousel Solution: 

4011043 Rev B 

 

The TSBroadcaster 

 

OCAP Object Carousel Acronyms and Terms, Continued 

 

Service 

A service is a set of resources signaled from a single PMT. It 

is equivalent to an MPEG “Program” or the generic term 

“Channel.” 
If you are broadcasting applications that are bound to a set of 

services, then you will need to define that set of services. 

When the receiver is tuned to one of these services by a 

viewer, the applications associated with that service will be 

launched. For bound applications, you need one service per 

“channel” that you wish to signal applications on. 
If you are broadcasting unbound applications, then you need 

a service to allow the object carousels to be referenced. There 

is no need to make this a service visible to the viewer, 

although it must be signaled to allow the receiver to access it 

and read the unbound application content from the 

associated carousel(s). For unbound applications, you need a 

single service to act as an access point to the object carousel. 

Stream Event 

A stream event is an event that can happen at an arbitrary 

time. One example of a stream event is a ticker tape 

application that scrolls across the bottom of the TV screen.