Link electronics HDC-925 User manual

INTRODUCTION: The HDC-925 1RU product is an up, down and cross conversion unit that promotes image quality
totheProfessionalvideoworld.TheHDC-925ispackedwithfeaturessuchasPixelMotion™ De-interlacing and Multi-
Directional Diagonal filter (MDDF™) algorithms, drastically reducing jaggies on diagonal lines. This product also
has Per-Pixel Temporal Recursive Noise Reduction algorithm that minimizes HD and SD video noise.
Flexview™ Aspect Ratio is a non-linear anamorphic aspect ratio designed for converting 4:3 aspect ratio material
to 16:9 aspect ratios without the distortion that is often associated with anamorphic stretching. Flexview leaves
the center portion of the image Untouched and provides increasing amounts of stretch towards the edges of the
image, filling the 16:9 images without distorting the center area of the image.
This high-quality converter uses the Teranex’s HQV™ Technology and yields unsurpassed image quality for the
demanding user.
This flexible product is able to handle just about all broadcasting formats at its inputs and outputs in either HD
or SD formats. The HDC-925 uses a Silicon Optix Realta image processing engine inside that maximizes image
processing capability. The result? The best possible picture from a flexible, powerful, and user-friendly front
panel. The front panel along with the software allows the user to setup all functions of the HDC-925
OVERVIEW
PixelMotion™ De-interlacing: PixelMotion de-interlacing of video originated material produces perfect progressive
frames in preparation for further processing. The processing aperture is adjusted on a pixel-by-pixel basis, which
preserves all of the detail of the original interlaced image and eliminates jaggies in the output image.
Aspect Ratio Control: Allows selection from standard aspect ratios, such as common top & bottom, common sides,
14:9 and Anamorphic. In addition, it allows for Flexview, a non-linear anamorphic aspect ratio
, to be used in up-conversions.
DetailEnhancement:Isan edge-sharpening filter basedona traditional film compositing technique called "Unsharp
Masking." This filter corrects any blurring introduced during image capture, compression or resampling.
Noise Reduction Adjustable noise reduction controls offer a greater degree of temporal recursive noise
reduction with fewer artifacts. A bias control allows the aggressiveness to be fine-tuned. For filter performance
testing, a Red Overlay can be applied that will color pixels that are in motion in Red
Up-/Down-conversion: In situations where the highest image quality up- or down-conversion is necessary, Link’s
HDU-925 uses proprietary PixelMotion™ De-interlacing and Detail Enhancement combined with powerful array
processing to provide the best image solution.
APPLICATION: The first step in the conversion process is to identify whether the input material is video or film
originated. The identification process happens in a fully automatic mode and selects either PixelMotion De-
interlacing for video based material or 3:2 Detection for film based material. The goal is to apply the appropriate
filter in order to recover the full vertical resolution of the input material.
PixelMotionde-interlacingproducesperfectprogressiveframesinpreparationforfurtherprocessing.The processing
aperture is adjusted on a pixel-by-pixel basis, which preserves all of the detail of the original interlaced image.
Additionally, the filter eliminates “jaggies” in the output image, providing well-defined edges on objects and
producing the sharpest images possible.
3:2 Detection recognizes the redundant fields inserted by the telecine during the conversion of film to video. This
advanced 3:2 pull-down filter avoids frame rate conversion artifacts and provides the highest vertical resolution
and motion quality.
Since the quality of the video de-interlacing is so high, there will be no difference visible in the vertical resolution
seen with film originated material and that of the de-interlaced video originated material.
Once the image has been de-interlaced and up-converted, Detail Enhancement can be applied to the image to
further sharpen and enhance the output. This filter adds an additional level of image quality by helping to better
define the detail in the up-converted image. Detecting the edges of objects andadjustingthecontrastratioaround
those objects to help separate them from the Background achieve this.
LINK ELECTRONICS, INC 2137 Rust Avenue
Cape Girardeau, MO 63703 Phone: [phone] FAX: [phone]
LINK ELECTRONICS, INC.
HD/SD SDI UP/DOWN/CROSS CONVERSION
MODEL HDC-925
Features
Broadcast Quality Processing
Up/Down/Cross Conversion
SD/HD SDI I/O
Noise Reduction
8 Channels of Embedded Audio
WSS & RP186 Aspect Ratio Control
FlexViewTM Aspect Ratio
Control And Status Via Web Browser
Full SD 608 & HD 708 Closed Caption Support
Black Burst/Tri-Level Gen-Lock
Audio Error Checking
Frame Synchronizer
Audio Delay
Video Proc Amp
DVI-I Output
HD Caption Line Select
5 GPI Triggered Selection
ATC Ancellary Time Code Supported
Detail & Sharpness Enhancement
Ease of Operation
The Link Electronics HDC-925 is a DTV format
converter that can convert SD video to and from HD
in real time with exceptional quality.
The HDC-925 is able to up/down/cross convert HD
SD SDI signals, packed with proprietary algorithms
such as PixelMotionTM De-interlacing and Multi-
Directional Diagonal filters, and Per-Pixel Temporal
Recursive Noise Reduction algorithms minimizing
HD and SD video noise.
The HDC-925 features FlexViewTM Aspect Ratio, a
non-linear anamorphic aspect ratio designed for
converting 4:3 aspect ratio material to 16:9 aspect
ratios without the distortion that is often associated
with anamorphic stretching.
The HDC-925 is able to handle a myriad of SD/HD
Broadcasting formats. The HDC-925 is a high-quality
Format Converter based on Teranex’s HQV award
winning Technology. It yields unsurpassed image
quality for the demanding Professional.
LINK ELECTRONICS, INC.  2137 Rust Avenue  Cape Girardeau, MO 63703
Phone: [phone] FAX: [phone]

Video Input:
SD & HD SDI Input:
SDHDSDI,10-bitserialdigitalinput at 270Mb/s perSMPTE-259-Cor20-bitserialdigitalinput at 1.485Gb/s
per SMPTE 292-1997, SD audio embedding per SMPTE 272M or HD audio embedding per SMPTE-299
Formats SD: 480i59.94, 576i50
Formats HD: SMPTE-274M: 1080i59.94, 1080i50, 1080sf23.98
Formats HD: SMPTE-296M: 720p59.94, 720p50
Cable Length SD: 300m Belden 1694A at 270Mb/s and HD: 110m Belden 1694A at 1.485Gb/s
Automatic input format detection or Manual input format selection
Active loop out
SD & HD SDI Output (2):
SD HD SDI, 10-bit serial digital output at 270Mb/s per SMPTE-259-C or 20-bit serial digital output at 
1.485Gb/s per SMPTE 292-1997, SD audio embed per SMPTE 272M or HD audio embed per SMPTE-299
Formats SD: 480i59.94, 576i50
Formats HD: SMPTE-274M: 1080i59.94, 1080i50, 1080sf23.98
Formats HD: SMPTE-296M: 720p59.94, 720p50
Return Loss: >15dB up to 1.5GHz per SMPTE-292M
Jitter: <0.2UI as per SMPTE-292M
Reference Input
SD Blackburst – SMPTE-170M or HD Tri-level Sync – SMPTE 274M / SMPTE296M
Active loop out
Pixel and Line adjustment (range of adjustment based on selected output format)
Audio Input/Output, Embedded Audio:
8 channels of embedded audio
Sampling: 48KHz
Quantization: SD: 20-bits, HD: 24-bits
Ancillary Data Input/Output:
Closed Caption
SMPTE-334m
SDID=1, SDID=2 not currently supported
Service 1 Only
ITU-608 pass-through for 480i59.94 Input/Output processing (all incoming services will pass through,
i.e. CC1, CC2, CC3, CC4, T1, T2, T3,T4, and XDS).
ITU-608 to ITU-708 translation for 480i59.94 up-conversions to 720p59.94 & 1080i59.94 (only the
primary language from CC1 will be transcoded to DTVCC service S1).
ITU-708 pass-through for HD Input/Output processing for 720p59.94 & 1080i59.94 (all DTVCC services
will pass through, the frame rate and checksums will be adjusted as necessary).
ITU-708, Line 21 extraction for down-conversions from 1080i59.94 or 720p59.94 to 480i59.94 (only if the
line 21 data is present in the 708 CDP, otherwise the output will contain a clock-run-in with null text).
Vertical Interval Time Code (VITC)
Supports vertical interval timecode (VITC) delay to automatically match the video processing delay
Video Indexing
Supports WSS & RP186
Processing Features:
Video Proc Amp
Video gain – adjustable +/- 6dB, default = 0
Black Level – adjustable +/- 30mV, default = 0
Hue – adjustable -179 to +178, default = 0
Saturation – adjustable +/- 6dB, default = 0
Enhance
Detail Enhance - adjustable 0 to 100, default = 0
Sharpness - adjustable 0 to 100, default = 63
Colorspace conversions
Operates automatically based on the selected conversion
There are no user controls for this function
Temporal Recursive Noise Reduction Filter
Bias - adjustable High, Medium, Low, Off, default = Off
Split screen - On/Off
Red Overlay - On/Off
DVI Output
DVI Type: DVI–I, Single Link
Formats Supported: 720p59.94, 720p50, 1080i59.94 & 1080sf23.98
Auto, Film, Video
Allows selection of auto, film, or video processing modes. Default = Auto
Aspect Ratio Conversion
Fixed Aspect Ratio Conversions
Common Top & Bottom
Common Sides
Anamorphic
Flexview
Audio Processing
Supports audio delay adjustment
500ms to +500ms, default = 0ms
Ethernet:
10/100-BaseT Ethernet
Supports DHCP
User Presets
The HDC-925 supports 5 User Presets per video processing channel
General Purpose Interface (GPI)
The HDC-925 supports 5 GPI inputs
GPI 1 is assigned to User Preset 1
GPI 2 is assigned to User Preset 2
GPI 3 is assigned to User Preset 3
GPI 4 is assigned to User Preset 4
GPI 5 is assigned to User Preset 5
GPI triggers can be momentary closures or held low
OLC Web Interface
Format
Input Format Selection
Auto or Manual Selection
Output Format Selection
Picture
Proc Amp & Enhance Settings Adjustment
Aspect Ratio Selection
Proc Amp Adjust Selection
Advanced
Source Selection
TVP Level Selection
Noise Reduction Level Selection
Setup
Preset Selection
Index Support Selection
Audio Group Selection
Audio Delay Adjustment Selection
Audio Error Checking
Timecode Output Line Selection
Closed Caption Support Selection
Closed Caption HD Input/Output Line Selection
Reference Source Selection
Pixel/Timing Adjustment Selection
Reference Timing Adjustment Selection