Dolby Laboratories DP524 Manual de usuario descargar pdf (Pagina 35)

DP571 Dolby

E Encoder User’s Manual Hardware Description

Table 6-5 Preset Mode Rally Indication on the Status Port

Preset Tally A Preset Tally B Preset

Low High 1

High Low 2

Low Low 3

6.2.2 Metadata Connector

Audio metadata from an upstream device, like a DP570 Multichannel Audio Tool or a

DP572 Dolby E Decoder, can be connected to the DP571 here. The audio metadata

stream, which includes important information to properly format the audio when

received and decoded in the home, will be incorporated into and carried by the

encoded Dolby E data stream created by the DP571. For information on metadata

parameters that may need to be explicitly set or checked, see Section 7.2.8.

This is a 9-pin full-duplex RS-485 female D-connector running at 115 kbps. The

pinout, show in Table 6-6 is SMPTE 207M compatible.

Table 6-6 Metadata Connector Pinout

Pin Connection

1 Shield

2 TX A asynchronous data out –

3 RX B asynchronous data in +

4 Ground

5 NC

6 Ground

7 TX B asynchronous data out +

8 RX A asynchronous data in –

9 Shield

6.2.3 PCM Delay In/Out Connectors

When sending both encoded and nonencoded channel pairs to a digital recorder, the

nonencoded pair can be delayed to remain synchronized with the encoded signal. The

DP571 encoder contains a one video frame PCM utility delay that allows the PCM

input signal to be transported in–sync with the digital inputs. One frame of delay is

added to the PCM signal transmitted from the PCM Delay Out connector to match the

Dolby E encoding delay.

6-5

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Dolby Laboratories DP524 Manual de usuario Pagina 35