Cobalt-digital COMPASS 9305 Embedded Audio Delay Processor Manual do Utilizador descarregar pdf (Página 9)

9305-OM (V4.1) 9305 PRODUCT MANUAL 1-5

Introduction 9305 Functional Description

9305 Functional Description

Figure 1-1 shows a functional block diagram of the 9305. The 9305

HD/SD-SDI Embedded Audio Delay provides independent delay settings

from 2.00 msec to 10500.00 msec (10.5 seconds) for up to 16 embedded

audio channels. The output timing can be locked to that in the input video, or

an external black burst/tri-level video reference signal.

In addition to the delay function, the 9305 also provides audio routing that

acts as a full audio cross point. Each of the 16 embedded audio output

channels can receive signal from any one of the 16 embedded input channels,

four internal tone generators, or several mixer outputs. Unused output

channels can be mapped to a “Silence” source. Each output also provides gain

adjustment and selectable polarity inversion.

9305 Input/Outputs

The 9305 provides the following video inputs and outputs:

• Inputs:

• HD/SD SDI IN – dual-rate HD/SD-SDI input

• Outputs:

• SDI OUT – four dual-rate HD/SD-SDI post-processed buffered

video outputs

• RCK OUT – four reclocked HD/SD-SDI pre-processed buffered

input copies

Audio Delay and Timing Function

Delay controls for each embedded channel provide independently adjustable

delay ranging from 2.00 msec to 10500.00 msec (10.5 seconds). Audio data

blocks are sequentially held in independent buffers and released per the delay

setting at the intervals dictated by the delay setting and the user-selected

timing reference source.

The 9305 allows selection from the following reference timing sources:

• Input Video – Timing is derived from the input video.

• Reference 1 and Reference 2 External References – Timing is

derived from an external reference signals distributed with the card

frame (

EXT REF IN (1,2) in Figure 1-1), thereby allowing the audio to

be synchronized to a black burst or tri-level video reference. Where

compatible, using an external timing reference can allow for quicker

lock acquisition.

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Cobalt-digital COMPASS 9305 Embedded Audio Delay Processor Manual do Utilizador Página 9