Ericsson SPR1100 Operations Instructions download pdf (Page 61)

Getting Started

3.8 How to Set Up Reflex on an Output Transport Stream

About Reflex

Reflex is the statistical multiplexing system provided by Ericsson. Reflex on the

SPR1100 operates completely within the unit and does not require an external

controller. A single output Transport Stream can be configured so that each service

varies its bit rate dynamically according to the complexity of the video frames.

Reflex works on a group of components (called a Reflex group), and monitors the bit

rate demand of each component within the group on a frame-by-frame basis. It

automatically adjusts the bit rate allocated to each component to ensure that the

picture quality is optimized.

The ability to create output Reflex groups does not depend on the whether the input

service was originally part of a reflex group – both CBR video and VBR video input

elementary streams can be converted to Reflex at the output.

The following limitations apply:

 Maximum number of Reflex groups per SPR1100: 18

 Maximum number of services per Reflex group: 24

 Maximum number of output services across all groups: 72 (SD) OR 24 (HD).

A Reflex group can use the available bit rate within a Transport Stream, or it can

have a manually set bit rate. Either way, the sum of the bit rates of the components

within the group cannot exceed the Reflex group bit rate

Reflex does not require an external control entity for correct operation. As a trade-

off, Reflex can only control the bit rates of internally generated components.

Reflex requires a valid SPR/SWO/IREFLEX license for each reflex group that is

created.

Creating Reflex Support

You can set up a Reflex Group when you initially create the output (see section 3.7

How to Create an Output Service), or subsequently, by manually creating the Reflex

group on an empty outp

ut Transport Stream and manually dragging services into it.

Setting up Reflex Group Parameters

Once all the components to be statistically multiplexed are added to the Reflex

group, you can set up the group parameters.

To set up the Reflex Group parameters:

1. In the Outputs widget, select the Reflex group you want to set up.

2. In the Properties widget, set a name for the group in the Group Name field.

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Ericsson SPR1100 Operations Instructions Page 61