Nevion ADC-SDI User Manual
Flashlink User Manual
ADC-SDI
NTSC/PAL to SDI encoder
network-electronics.com
Rev. 6
ADC-SDI Rev. 6
Network Electronics AS
P.O. Box 1020
N-3204 Sandefjord, Norway
Phone: +47 33 48 99 99
Fax: +47 33 48 99 98
Email:
support@network-electronics.com
www.network-electronics.com
Support Phone: +47 90 60 99 99
Revision history
Current revision of this document is the uppermost in the table below.
Rev. Repl. Date Sign Change description
6 5 2008-07-14 AS Added Declaration of Conformity. 5 4 2007-10-23 AS New front page. 4 3 2007-10-09 AS Added Materials Declaration and EFUP 3 2 2007-06-26 TØ Corrected value for Return loss to ‘> 35 dB’ under
specifications. Applied new document template,
cleaned up document structure, added Appendix A
Materials declaration and recycling information.
2 1 2005-07-07 New functionality added to DIP switch 9 (software
release ≥ 7).
1 0 2005-03-03 Specification updated, and changed ConQuer to
Flashlink.
0 C 2004-01-20 Updated with info about luma/chroma separation
filter. C B 2003-01-28 Updated to ConQuer (software release 2). B A 2002-02-07 Changed section numbering. A - 2001-12-01 LED descriptions, and Flashlink commands.
Preliminary revision for PIC software revision 0.1.2
network-electronics.com | 2
ADC-SDI Rev. 6
Contents
1 Product overview ..................................................................................................... 4
1.1 Quick Start Guides for ADC-SDI ........................................................................................4
2 Specifications .......................................................................................................... 5
2.1 Digital Serial Output ...........................................................................................................5
2.2 Analogue input, both PAL (625/50) and NTSC (525/60) ....................................................5
2.3 Processing performance ....................................................................................................5
2.4 Electrical.............................................................................................................................5
3 Configuration ........................................................................................................... 6
3.1 Data path............................................................................................................................6
3.2 EEPROM............................................................................................................................6
3.3 Power-up sequence ...........................................................................................................6
3.4 Channel search modes ......................................................................................................6
3.5 Luma / chroma separation filters ........................................................................................7
3.6 Selection of luma/chroma separation filter .........................................................................8
4 Connections............................................................................................................. 9
4.1 Mounting the connector module .........................................................................................9
4.2 Correspondence of connectors and signals .......................................................................9
5 Operation............................................................................................................... 11
5.1 Module status - Light Emitting Diodes..............................................................................11
5.2 Switches ...........................................................................................................................11
5.3 Interface with GYDA or other controllers..........................................................................14
General environmental requirements for Network Electronics equipment ................ 17
Product Warranty...................................................................................................... 18
Appendix A Materials declaration and recycling information..................................... 19
A.1 Materials declaration........................................................................................................19
A.2 Environmentally-friendly use period.................................................................................19
A.3 Recycling information.......................................................................................................20
EC Declaration of Conformity ................................................................................... 21
network-electronics.com | 3
ADC-SDI Rev. 6
1 Product overview
Figure 1: Simplified block diagram of the ADC-SDI card
The Flashlink ADC-SDI is a high-quality 10-bit NTSC/PAL composite 4:2:2 to digital video converter.
ADC-SDI user parameters can be changed via switches on the unit, or via the GYDA control interface.
To aid digital to analogue conversion of the digital output the ADC-SDI may generate a white
pulse to mark first field of an 8-field-PAL/4-field-NTSC signal. If the digital to analogue
converter is able to detect this, it will synchronize to the correct field (8-field-PAL/4-fieldNTSC) when synchronizing to an external Black & Burst-generator. The Flashlink DAC-SDI
is able to do this.
1.1 Quick Start Guides for ADC-SDI
1.1.1 Without GYDA controller
1. Attach Analogue input (CVBS or S-Video) and SDI-output to the backplane module
(see
Figure 2).
2. Set DIP-switch 1 on (towards backplane), switches 2 and 3 according to the Input
Channel search-mode you want (see
3. Insert ADC-SDI into a slot in the sub-rack.
4. Power on. After some seconds the ADC-SDI should be running, and the input should
be detected. No LED should be red and the SDI output should be active. If this is not
the case, please see section
5.1.
1.1.2 With GYDA controller
1. Attach Analogue input (CVBS or S-Video) and SDI-output to the backplane module
(see
Figure 2).
2. Insert ADC-SDI into a slot in the sub-rack.
3. Power on. After some seconds the ADC-SDI should be running, and the input should be detected. No LED should be red and the SDI output should be active. The card settings should be as the previous time power was applied.
4. Communication with the card is described in section
Table 3).
5.3.
network-electronics.com | 4
ADC-SDI Rev. 6
2 Specifications
2.1 Digital Serial Output
Output format 270 Mb/s scrambled NRZI
Output level 800 mV nominal
Return loss > 15 dB
2.2 Analogue input, both PAL (625/50) and NTSC (525/60)
Input formats CVBS
S-Video
Input level 1000 mV nominal ± 10 mV
Return loss > 35 dB
2.3 Processing performance
Signal path 10 bits
Video processing delay 2 video lines
2.4 Electrical
Input Voltage DC 5 V
DC –15 V
Power Consumption < 2.6 W
network-electronics.com | 5
ADC-SDI Rev. 6
3 Configuration
3.1 Data path
The Analogue input is identified, the synchronization information in the analogue signal is
detected, and the analogue signal is digitized to a 10-bit parallel signal in a dedicated chip. A
FPGA adds EDH-information and Field 1 marking. Finally a chip serializes and scrambles
the signal, and drives the resulting 270 Mb/s SDI-signal onto three output connectors.
3.2 EEPROM
The ADC-SDI card actually has two EEPROM's. A small EEPROM is included in the microcontroller, while a larger external EEPROM holds the configuration memory of the FPGA and the input video chip.
3.2.1 Internal EEPROM
State variables are written to EEPROM in the microcontroller each time a configuration change is made. Basically, the card remembers it's setting between power-downs.
3.2.2 External EEPROM
The configuration memory of the FPGA and the input video chip is upgradeable. This is, however, a task for qualified maintenance personnel.
3.3 Power-up sequence
At power-up, the card performs a self-check, and initiation. The manual mode switch is then
sampled. If manual mode is enabled, the other switch settings are read and the state of the
card set accordingly. If manual mode is disabled, the state the card held the previous time it
was used is read from EEPROM. The interplay between the EEPROM, the switches and the
GYDA (or other) controller adheres to the following simple rules:
− If a GYDA controller is present in a system, it can always override manual settings.
− If the manual mode is used together with a GYDA controller, the ADC-SDI will initiate
as determined by the switches, and may then be overridden by the controller.
− If the manual mode is not used, the ADC-SDI will initiate as determined by the state
of the EEPROM. It is subsequently controlled by the GYDA controller.
− At any time, when a state change is done, whether it be by switches or GYDA, the
state is stored in the EEPROM as soon as it is detected.
3.4 Channel search modes
ADC-SDI will search for an input-signal, try to identify it and hopefully find a signal it can lock to.
ADC-SDI has 2 input channels with 3 types of input:
− CVBS Channel 1
− CVBS Channel 2
− S-Video: Luma Channel 1, Chroma Channel 2.
network-electronics.com | 6
ADC-SDI Rev. 6
To search for input ADC-SDI has 4 channel search modes:
− Automatic ADC-SDI searches for any possible input signal type. When a signal is
detected, it tries to lock to it, and stops searching.
− CVBS Ch. 1 ADC-SDI searches for CVBS input on channel 1, and ignores other
input types. When a signal is detected, it tries to lock to it, and stops searching.
− CVBS Ch. 2 ADC-SDI searches for CVBS input on channel 2, and ignores other
input types. When a signal is detected, it tries to lock to it, and stops searching.
− S-Video ADC-SDI searches for S-Video input, Luma on channel 1, chroma on
channel 2, and ignores other input types. When a signal is detected, it tries to lock to
it, and stops searching.
If the input type is changed while the card is running, or the signal is missing or lost, the card will start searching for the type of signal defined by the channel search mode. Channel search mode settings are described in sections 6 and 7.3.
3.5 Luma / chroma separation filters
The ADC-SDI module has 4 different luma / chroma separation filters to select between.
3.5.1 Comb filter - adaptive between 3-line (½, 0, ½) and no comb filter
This filter will adaptively select between 3-line (½, 0, ½) comb filter and no comb filter.
Adaptive comb filter is available for both luminance and chrominance. The adaptive comb
filter algorithm computes the vertical and horizontal contours of colour based on a block of
3x3 pixels. If there is a sharp colour transition, comb filtering is applied to the two lines that
have fewer colour changes. If there is no colour transition, 3-line comb filtering is used with
filter coefficients (½, 0, ½).
The comb filter can be selectively bypassed in luma or chroma path. If the comb filter is bypassed in the luma path, then chroma trap filters are used which has a characteristic according to CCIR601.
The adaptive comb filter algorithm reduces artefacts such as hanging dots at colour boundary and detects and properly handles false colour in high frequency luminance images such as a multi burst pattern or circle pattern.
3.5.2 Comb filter - adaptive between 3-line (¼, ½, ¼) and no comb filter
This filter will adaptively select between 3-line (¼, ½, ¼) comb filter and no comb filter, same functionality as the above, but with different filter coefficients.
3.5.3 Fixed 2-line comb filter
This is a fixed 2-line comb filter with no adaptive selection.
3.5.4 No comb filter
This filter has no comb filter enabled. The luma signal will be filtered with a chroma trap, and the chroma signal will be filtered with a low pass filter.
network-electronics.com | 7
Loading...