GENNUM GS2971 User Manual
GS2971 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer
HD-SDI
Application: Single Link (3G-SDI)
to Dual Link (HD-SDI) Converter
GS2962/72
Link A
Link B
HVF/PCLK
10-bit
3G-SDI
GS2971
GS2962/72
10-bit
HVF/PCLK
HD-SDI
Application: 1080p50/60 Monitor
Audio
Selector
Video
Proces sor
10-bit
HVF/PCLK
CTRL/TIMECODE
AES - OUT
AUDIO 1/2
Audio Clocks
Speakers
Display
DAC
DAC
3G-S DI
GS2971
AUDIO 3/4
AUDIO 5/6
AUDIO 7/8
Key Features
• Operation at 2.97Gb/s, 2.97/1.001Gb/s, 1.485Gb/s,
1.485/1.001Gb/s and 270Mb/s
• Supports SMPTE 425M (Level A and Level B), SMPTE
424M, SMPTE 292M, SMPTE 259M-C and DVB-ASI
• Integrated adaptive cable equalizer
• Typical equalized length of Belden 1694A cable:
150m at 2.97Gb/s
250m at 1.485Gb/s
480m at 270Mb/s
• Integrated Reclocker with low phase noise, integrated
VCO
• Serial digital reclocked, or non-reclocked output
• Integrated audio de-embedder for 8 channels of 48kHz
audio
• Integrated audio clock generator
• Ancillary data extraction
• Optional conversion from SMPTE 425M Level B to
Level A for 1080p 50/60 4:2:2 10-bit
• Parallel data bus selectable as either 20-bit or 10-bit
• Comprehensive error detection and correction
features
• Output H, V, F or CEA 861 Timing Signals
• 1.2V digital core power supply, 1.2V and 3.3V analog
power supplies, and selectable 1.8V or 3.3V I/O power
supply
• GSPI Host Interface
• -20ºC to +85ºC operating temperature range
• Low power operation (typically 545mW)
• Small 11mm x 11mm 100-ball BGA package
• Pb-free and ROHS compliant
Applications
Application: Multi-format Downconverter
SD/HS/3G-SDI
Analog
Sync
GS2971
Sync
Seperator
10-bit
HVF/PCLK
AES 1/2
AES 3/4
AES 5/6
AES 7/8
GS4901
10-bit bit SD Bypass
Memory
Video
Downc onverter &
Aspect Ratio
Conversion
Audio
Processing
& Delay
Audio Clocks
HVF/PCLK
AES 1/2
AES 3/4
AES 5/6
AES 7/8
10-bit
HD/SD
Serializer
(GS1582,
GS2972)
SD-SDI
Adaptive Cable Equalizer
Product Brief
51914 - E June 2009
www.gennum.com
1 of 5GS2971 3Gb/s, HD, SD SDI Receiver, with Integrated
The device features an Integrated Reclocker with an
Application: Multi-input Video Monitoring System
GS4911
Analog
Sync
Sync
Seperator
Video
Formatter
Video
Memory
HVF/PCLK
Audio Clocks
10-bit
HVF/PCLK
AES OUT 1/2
AES OUT 3/4
AES OUT 5/6
AES OUT 7/8
HVF/PCLK
HVF/PCLK
Audio
Select
10-bit
10-bit
On Screen
Display
Generator
AES BUS
Audio
Processor
HV/DE/PCLK
DVI/
VGA DAC
Video
Output
3G-SDI
Input 1
GS2971
GS2971
GS2971
3G-SDI
Input 2
3G-SDI
Input n
Application: Multi-format Audio De-embedder Module
PCLK
10- bit
GS2962
DAC
Switch
Logic
&
Drivers
Analog
Audio
Outpu ts
AES
Audio
Outpu ts
AUDIO 1/2
AUDIO 3/4
AUDIO 5/6
AUDIO 7/8
Audio Clocks
SD/HD/3G-SDI
GS2971
SD/HD/3G-SDI
Application: Multi-format Digital VTR/Video Server
Storage :
Tape /HD D/Solid S tate
Audio
Proces sor
Video
Proces sor
10-bit
HVF/PCLK
Audio Outputs
Video Output
Audio Clocks
AUDIO 1/2
AUDIO 3/4
AUDIO 5/6
AUDIO 7/8
SD/HD/3G-SDI
GS2971
internal VCO and a wide Input Jitter Tolerance (IJT) of 0.7UI.
A serial digital loop through output is provided, which can
be configured to output either reclocked or non-reclocked
serial digital data. The Serial Digital Output can be
connected to an external Cable Driver.
The device operates in one of four basic modes: SMPTE
mode, DVB-ASI mode, Data-Through mode or Standby
mode.
In SMPTE mode, the GS2971 performs SMPTE
de-scrambling and NRZI to NRZ decoding and word
alignment. Line-based CRC errors, line number errors, TRS
errors and ancillary data check sum errors can all be
detected. The GS2971 also provides ancillary data
extraction. The entire ancillary data packet is extracted,
and written to host-accessible registers. Other processing
functions include H:V:F timing extraction, Luma and
Chroma ancillary data indication, video standard detection,
and SMPTE 352M packet detection and decoding. All of the
processing features are optional, and may be enabled or
disabled via the Host Interface.
Description
The GS2971 is a multi-rate SDI integrated Receiver which
includes complete SMPTE processing, as per SMPTE 425M,
292M and SMPTE 259M-C. The SMPTE processing features
can be bypassed to support signals with other coding
schemes.
The GS2971 integrates Gennum's next-generation
state-of-the-art adaptive cable equalizer technology,
achieving unprecedented cable lengths and jitter tolerance.
It features DC restoration to compensate for the DC content
of SMPTE pathological signals.
GS2971 3Gb/s, HD, SD SDI Receiver, with Integrated
Adaptive Cable Equalizer
Product Brief
51914 - E June 2009
Both SMPTE 425M Level A and Level B inputs are
supported. The GS2971 also provides user-selectable
conversion from Level B to Level A for 1080p 50/60 4:2:2
10-bit formats only.
In DVB-ASI mode, 8b/10b decoding is applied to the
received data stream.
In Data-Through mode, all forms of SMPTE and DVB-ASI
decoding are disabled, and the device can be used as a
simple serial to parallel converter.
The device can also be placed in a lower power Standby
mode. In this mode, no signal processing is carried out and
the parallel output is held static. Placing the Receiver in
Standby mode will automatically place the integrated
equalizer in power down mode as well.
Parallel data outputs are provided in 20-bit or 10-bit
multiplexed format for 3Gb/s, HD and SD video rates. For
1080p 50/60 4:2:2 10-bit, the parallel data is output on the
20-bit parallel bus as Y on 10 bits and Cb/Cr on the other 10
bits. As such, this parallel bus can interface directly with
video processor ICs. For other SMPTE 425M mapping
structures, the video data is mapped to a 20-bit virtual
interface as described in SMPTE 425M. In all cases this
20-bit parallel bus can be multiplexed onto 10 bits for a low
pin count interface with downstream devices. The
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