Dolby Laboratories DP524 Instrukcja Użytkownika Pobierz pdf (Strona 11)

DP571 Dolby

E Encoder User’s Manual

Chapter 1

Introduction

1.1 Dolby E Technology Overview

Dolby

E is a professional audio data stream designed to carry up to eight channels of

audio and metadata on stereo digital audio (PCM) systems, such as VTR’s, servers,

contribution and distribution links and within AES, SDI or HDSDI infrastructure.

1.2 Dolby E Characteristics

Dolby E encoding technology:

• Works with existing broadcast hardware and infrastructure.

• Transmits up to eight channels of high-quality audio within two PCM channels.

• Has native support for Dolby Digital emission metadata.

• Is synchronous with standard video frame rates.

• Maintains excellent sound quality after multiple encode/decode generations.

• Can be edited and manipulated in coded form.

• Provides frame-rate conversion capabilities.

• Encoding and decoding each take one video frame

Although the Dolby E bitstream is carried on a standard AES pair, it is not a

conventional digital audio signal. The AES stream combines audio encoded in Dolby

E with metadata and timecode into a data (rather than audio) stream.

Note: Because Dolby E is a data stream, it may appear to be clipped or distorted on

standard VU or peak reading meters, but this is normal.

1.3 Equipment Required

Audio is encoded into a Dolby E stream by the DP571 as described in this manual.

The bitstream can be decoded by the DP572 Dolby E Decoder or by a device

containing a Dolby E decoding option.

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