 DAP-1781 Introduction
Advanced audio functions
Loudness measurement
 datasheet (1303K)
manual (1420K)
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| Key features and benefits
- 8 channels of audio processing with 4 AES inputs and outputs
- Works as standalone audio processor or alongside video processing cards
- Audio processing functions include gain (-96 to +12 dB), phase, shuffling and mixing
- Fixed and video tracking delay
- 2 and 4 channel mix downs and summing
- Audio crossfades on 2 channel mix
- Locks to video, URS frame reference or AES2
- Provides audio level meters streamed over IP
- Dolby E compliant
- Metadata input and output (RS-422)
- Optional Downmix (5.1>2.0)
- Optional dynamic processing with compressor, limiter, expander
- Dolby E / Digital decoder option
- Dolby E / Digital encoder option
- Optional upmixing using Linear Acoustic technology
- Optional Loudness measurement ( ITU-R BS.1770 or Leq (A) )
- Dolby Metadata processing
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Description
The DAP-1781 is a high quality, 8 channel (4 AES) digital audio processor which performs signal processing and synchronizing, as well as Dolby E and Dolby Digital (AC-3) encoding and decoding with Metadata support. It can be used as a standalone audio processor for discrete audio signals, or it can be combined with a wide range of SD and HD video processor modules. When working with a video processor, the DAP-1781 can be used for dynamic processing, up/downmixing, and embedding of discreet audio channels into a video signal. It can also process Dolby E and Dolby Digital (AC-3) signals for encoding or decoding. Two audio processing cards can be combined together to process a total of 16 discreet audio channels. When combining any two cards together, all audio channels are synchronous, phased and delay matched to ensure proper alignment. A ribbon connector is used to carry audio, timing signals and Metadata between cards. The audio processor features two distinct processing blocks for input and output. The input processing includes gain, video tracking delay, additional fixed delay (up to 2 seconds per channel) and phase correction. The output processing block includes mixing, an additional gain/attenuation stage, and full channel shuffling. The 2 or 41 channel mixing block allows each output channel to be composed of a mix of any 2 or 4 audio channels. This provides the capability for stereo to mono down mixes, voice-overs, descriptive mixing, and custom-mix operations. Audio crossfades and voice-over function are also available in the 2 channel mix mode. Dynamic processing is available as an option, and this offers 16 channels of audio compressor / limiter / expander that can be adjusted as individual or grouped channel. Integrated up and downmixing are also optional. The Downmixing function will create a Lt Rt, Lo Ro, custom Lt Rt or Lo Ro from a 5.1 audio. The DAP-1781 gives you the ability to select one add-on module from a wide selection, including Dolby E /Dolby Digital decoding; or encoding; or Upmixing using the upMAX™ technology from Linear Acoustic. Loudness measurement of any processed audio channels (single or multiple) can de done within the DAP-1781. It is also possible to use the loudness and Dialnorm value measured by a LM100 from Dolby.
1 4 channel mixing/summing on even output channel mixers
Card stream video thumbnail and ALM via IP
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