Dolby DP-572

Dolby DP-572

Multi-Channel Dolby E Decoder Daily Rate: $50

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The Dolby DP572 decodes Dolby E encoded program material for use in broadcast and postproduction facilities prior to final DTV and HDTV transmission.


The DP572 Dolby® E Decoder is designed to ease the transition by DTV broadcasters and program producers from two-channel to multichannel audio. The DP572 decodes up to eight channels of high-quality audio, plus Dolby Digital metadata, from a Dolby E signal encoded on a single AES3 pair, external fiber, satellite link, digital videotape, digital audiotape, or from a video server. It is easily integrated into postproduction and broadcast facilities. The DP572 can accept both PCM and Dolby E signals and can switch automatically to provide seamless integration of multichannel and archived stereo programming.


Dolby E Advantages


With Dolby E, coded audio frames match video frames, ensuring that audio-follow-video edits are free of mutes, glitches, or other aberrations. This makes it possible to switch, route, and perform edits directly on the digital bitstream without decoding and reencoding. Dolby E audio also carries Dolby Digital metadata generated by the program's producers for final delivery to the home viewer's Dolby Digital decoder.


In multichannel programming, a "5.1 + 2" Dolby E configuration is typically used, with six of the eight channels carrying a 5.1 program and the other two an Lt/Rt (matrix surround-encoded) or stereo two-channel program. Alternate channel configurations are available for multilingual or other specialized applications. Front-panel status LEDs and the LCD indicate the configuration of the Dolby E source signal.


In addition to inputs for Dolby E audio, a second input, PCM delay, has multiple functions. These include insertion of a voiceover into the decoded Dolby E program, insertion of local stereo audio without the need for additional equipment, or automation of switching between stereo and multichannel programming within a transmission chain. When using this input, the DP572 creates appropriate metadata to automate the rest of the Dolby broadcast audio chain. The DP572 requires a standard video black reference signal, and can also be utilized in 24-frame applications when accompanied with the DP579 Dolby E Tri-Level Sync Interface. Outputs are provided for SMPTE timecode.



Audio Coding Algorithm
Dolby E

Dolby E Program Configurations

5.1 3 × 2 5.1 + 1 + 1 6 × 1
5.1 + 2 8 × 1 4 × 2 Others selectable

Audio Sampling Rate
48 kHz

Video Frame Rates
29.97 fps (NTSC)
25 fps (PAL)
23.98, 24, 30 fps (requires DP579 Dolby E Tri-Level Sync Interface)

Frequency Response
20 Hz to 20 kHz, ±0.25 dB

<0.01% at 1 kHz
<0.02%, 20 Hz to 20 kHz

Dynamic Range
>110 dB

Encoding: fixed, one video frame
PCM delay channel: fixed, one video frame or minimal delay

Power Requirements
90–264 VAC, 50–60 Hz, auto-sensing, 15 W maximum; designed to operate from a centrally switched power source

Dimensions and Weight
1-U rackmount: 44 × 483 × 324 mm (1.75 × 19 × 12.75 inches)
Net: 2.7 kg (5.9 lb)



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