XVP-3901-DC Densité Downconversion

3G/HD/SD Downconverter with Optional Audio Processor

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XVP-3901-DC Densité Downconversion Insights & Highlights
Video Formats Supported
Downconversion with Background Keying
Frame Accurate Aspect Ratio Conversion with AFD
Incoming Feed Processing
Flexible 5.1 Audio Processing
Dolby E Decoding, Automatic Loudness Control, Upmixing and Dolby Digital (AC-3) Encoding
Dolby Digital Plus Transcoding

Video Formats Supported

Video formats supported by the XVP-3901-DC.

Downconversion with Background Keying

Downconversion with background keying using XVP-3901 and HMP-1801:

The XVP family of interfaces features a background keying capability which allows side panels or letterbox black bars, introduced by downconversion, to be filled with video or graphics using the HMP-1801 media player module.


Frame Accurate Aspect Ratio Conversion with AFD

Frame accurate Aspect Ratio Conversion (ARC) can be performed automatically using embedded signaling based on the Active Format Description (AFD) standard. AFD data can be easily embedded in a signal by the Densité XVP processor family, and by the EAP-3901 embedder. With AFD, original image information is maintained throughout the entire conversion process for optimal viewing following 4:3 and 16:9 aspect ratio conversion.

For example, processing three input source formats (16:9 HD, 16:9 SD and 4:3 SD) in a typical HD/SD hybrid plant results in six different output possibilities. However, using automatic aspect ratio control based on AFD will prevent the ARC errors that may occur with manual control.


Incoming Feed Processing

Using the XVP-3901 significantly reduces the amount of equipment required for incoming feed processing. A single XVP-3901 replaces multiple single function devices to provide Dolby E decoding, audio processing and Dolby Digital or Dolby Digital Plus encoding.

Top Image: Traditional approach to Dolby E decoding and Dolby Digital or Dolby Digital Plus encoding using multiple devices.

Bottom Image: Using a single XVP-3901 3Gbps/HD/SD up, down and cross converter with audio processor for incoming feed processing.

Incoming Feed Problems XVP-3901 Features
 Remote feeds need to be adapted to station infrastructure Frame synchronization, full proc controls, color correction and legalizer
 Multiple audio formats and audio synchronization:
• Mixed up audio tracks
• Lip sync
• Dolby E and Dolby Digital encoded inputs
• 5.1 audio
• Loudness level
Extraction, processing and re-insertion for up to 4 embedded audio groups.
Video to audio match delay and fixed delay
Audio track mixing and shuffling
Discrete audio inputs/outputs handled using complimentary audio modules
Dolby Metadata insertion, and will delay Dolby E audio without compromising
encoded signal
Decode Dolby E or Dolby Digital to discreet PCM channels
Audio downmix from 5.1 audio to a Lt Rt or Lo Ro audio 2 channel signal
Stereo to 5.1 upmixing using Linear Acoustic technology
Automatic loudness control
 Receiving SD or HD signals at different times of the day Built-in up and downconversion automatically converts current input to
house format
 Receiving 1080i into 720p plant (or vice versa) Built in 720p to/from 1080i crossconversion eliminates need for costly external
converters
 Providing 16:9 and 4:3 aspect ratio conversion Automatic, frame accurate aspect ratio conversion using embedded signaling,
based on the Active Format Description (AFD) standard.
Background keying capability to fill side or top/bottom panels with graphics

Flexible 5.1 Audio Processing

The XVP-3901 can provide very versatile audio processing sequences, due to the flexibility of the optional audio sub-modules. The sub-modules include Dolby E decoding, Dolby Digital decoding, Dolby E encoding, Dolby Digital and Dolby Digital Plus encoding, Linear Acoustic upMAX 2.0 to 5.1 upmixing and automatic loudness control (ALC). Two audio sub-modules can be fitted to an XVP-3901 processor. All audio channels created by the modules are preserved, and can be selected in the output shufflers and mixers for embedding or discrete AES outputs.

Dolby E Decoding, Automatic Loudness Control, Upmixing and Dolby Digital (AC-3) Encoding

The XVP-3901 can be combined with the DAP-1781 for the most advanced multichannel audio processing. As indicated in the upper diagram, this combination can provide Dolby E decoding, automatic loudness control (using Linear Acoustic), upmixing and Dolby Digital (AC-3) encoding, while keeping audio/video tracking on the output. If upmixing is not required, this can be accomplished with a single XVP-3901 signal processor card using Grass Valley ALC (lower diagram).

Dolby Digital Plus Transcoding

The addition of Dolby Digital Plus to the Dolby Digital encoder means that Grass Valley’s audio processing module will provide the same high quality audio compression they always have, but at a data rate as much as 50 percent lower than currently required, enabling 5.1 multichannel audio at rates as low as 192 kb/s. When combining Dolby E decoding and Dolby Digital Plus encoding, broadcasters can can deliver an efficient multichannel surround sound across multiple platforms and content types.