Dolby E Multichannel Distribution System User Manual

Introduction

 

 

 

 

1.6Common Features of the DP571 and DP572

This section discusses the most important common features between the encoder and decoder. See Chapter 3 – DP571 Dolby E Encoder and Chapter 4 – DP572 Dolby E Decoder for complete references for both units.

1.6.1PCM Delay Channel

The encoder and decoder each impart an audio delay equal to one video frame. When feeding a pair of channels on a digital VTR, the non-encoded pair would be out of sync with the encoded signal. To compensate for the delay, the encoder and decoder both contain a one video frame PCM utility delay.

1.6.2Metadata

Metadata can be supplied to the DP571 encoder via an RS485 connection. During Dolby E decoding, the DP572 outputs metadata on an RS485 connection. Metadata can also be generated internally in the DP571.

1.6.3Timecode

SMPTE Linear Time Code (LTC) can be applied to the unbalanced BNC connector on the DP571, and can be recovered during decoding from the unbalanced BNC connector on the DP572. Both connectors are marked LTC. The time code data is carried as part of the Dolby E bitstream.

1.6.4Video Reference

An analog composite video reference signal is required for Dolby E encoding and decoding. Versions 1.05 and later support two frame rates: 29.97 Hz (NTSC) and 25 Hz (PAL). VITC information can be extracted from the video reference signal sent to the DP571 (for more information, see Time Code Input on page 3-9).

If the video reference signal is not present or invalid, the:

•DP571 will not encode a Dolby E bitstream;

•DP572 will stop decoding the Dolby E bitstream;

•Dolby E output on the encoder and the PCM outputs on the decoder will be muted;

•VRef LED will be red (if not present) or yellow (Vref unequal to frame rate).

1.6.5Channel Configuration

Because neither the DP571 nor DP572 permit internal remapping of the audio channels, the following channel configuration must be used to input a 5.1-channel signal to the DP571:

L/R → Digital Inputs 1/2

C/LFE → Digital Inputs 3/4

Ls/Rs → Digital Inputs 5/6

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Dolby Laboratories Common Features of the DP571 and DP572, PCM Delay Channel, Metadata, Timecode, Channel Configuration
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DP571, DP572 specifications

Dolby Laboratories has long been a pioneer in audio and video technology, continuously pushing the boundaries of entertainment experiences. Among their range of innovative products, the Dolby DP572 and DP571 audio processors stand out as powerful tools for commercial cinema and installation applications. These devices are designed to enhance the overall sound experience in theaters, auditoriums, and other large venues, making them crucial for delivering high-quality audio.

The Dolby DP572 is a multi-channel audio processor that supports 7.1 surround sound configurations. It is equipped with advanced Dolby technologies, including Dolby Digital, Dolby Digital Plus, and Dolby TrueHD. This versatility allows filmmakers and sound engineers to create immersive soundscapes that bring an added layer of realism to the viewer's experience. One of the salient features of the DP572 is its advanced processing capabilities, which include automatic calibration, loudness control, and extensive equalization options, ensuring that the sound quality is optimized for any environment.

On the other hand, the Dolby DP571 is a companion processor designed primarily for applications that require flexible audio routing and management. It features the same high-quality audio processing as the DP572 but focuses more on signal management, making it ideal for venues that may need to adapt their audio setup frequently. The DP571 supports both analog and digital audio inputs and outputs, providing versatility for various sound systems. Both units feature user-friendly interfaces, making them accessible for system integrators and operators alike.

In terms of connectivity, both processors boast multiple inputs and outputs, allowing seamless integration with existing audio systems and peripherals. They also support industry-standard audio formats, making them compatible with a wide range of content sources. Signature Dolby technologies, such as dialogue enhancement and surround sound synthesis, ensure that even the most complex audio tracks are rendered with precision.

In summary, the Dolby DP572 and DP571 audio processors are essential components for any cinema or professional audio setup. Their advanced features, compatibility with multiple audio formats, and the legendary sound quality synonymous with Dolby make them invaluable tools for creating immersive audio experiences that captivate audiences. Whether used in conjunction or independently, these processors deliver the high-fidelity sound that is key to modern entertainment.
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