GS2971A Datasheet, PDF (2/152 Pages) Gennum Corporation – Integrated audio clock generator

Application: Multi-input Video Monitoring System
3G-SDI
Input 1
3G-SDI
Input 2
GS2971A
10-bit
HV F/PCLK
GS2971A
10-bit
HV F/PCLK
Video
Memory
Video
Formatter
H V/DE/PCLK
DVI/
VGA DAC
Video
Output
3G-SDI
Input n
GS2971A
10-bit
HV F/PCLK
Analog
Sync
Sync
Seperator
AES BUS
GS4911
Audio
Select
HV F/PCLK
Audio Clocks
On Screen
Display
Generator
Audio
Processor
AE S OUT 1/2
AE S OUT 3/4
AE S OUT 5/6
AE S OUT 7/8
Application: Multi-format Audio De-embedder Module
SD/HD/3G-SDI
10-bit
P CLK
GS2962
SD/HD/3G-SDI
GS2971A
AUDIO 1/ 2
AUDIO 3/ 4
AUDIO 5/ 6
AUDIO 7/ 8
Audio Clocks
Switch
Logic
&
Drivers
DAC
AES
Audio
Outputs
Analog
Audio
Outputs
Application: Multi-format Digital VTR/Video Server
V ideo Output
SD/HD/3G-SDI
GS2971A
10-bit
HV F /P CLK
AUDIO 1/ 2
AUDIO 3/ 4
AUDIO 5/ 6
AUDIO 7/ 8
Audio Clocks
Video
Processor
Audio
Processor
Storage :
Tape/HDD/Solid State
Audio Outputs
Description
The GS2971A 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 GS2971A integrates Gennum's 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.
The device features an Integrated Reclocker with an
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 default operating mode), the GS2971A
performs full SMPTE processing, and features a number of
data integrity checks and measurement capabilities.
The device also supports ancillary data extraction, and can
provide entire ancillary data packets through
host-accessible registers. It also provides a variety of other
packet detection and error handling features. All of these
processing features are optional, and may be individually
enabled or disabled through register programming.
Both SMPTE 425M Level A and Level B inputs are supported
with optional conversion from Level B to Level A for 1080p
50/59.94/60 4:2:2 10-bit inputs.
In DVB-ASI mode, sync word detection, alignment and
8b/10b decoding is applied to the received data stream.
In Data-Through mode all forms of SMPTE and DVB-ASI
processing are disabled, and the device can be used as a
simple serial to parallel converter.
The device can also operate in a lower power Standby
mode. In this mode, no signal processing is carried out and
the parallel output is held static.
Parallel data outputs are provided in 20-bit or 10-bit format
for 3Gb/s, HD and SD video rates, with a variety of mapping
options. As such, this parallel bus can interface directly with
video processor ICs, and output data can be multiplexed
onto 10 bits for a low pin count interface.
Up to eight channels (two audio groups) of serial digital
audio may be extracted from the video data stream, in
accordance with SMPTE 272M-C and SMPTE 299M.
The output audio formats supported by the device include
AES/EBU and I²S, and two other industry standard serial
digital formats. A variety of audio processing features are
provided to ease implementation. Audio clocks are
internally generated and provided by the device.
GS2971A 3Gb/s, HD, SD SDI Receiver
Data Sheet
54311 - 2
September 2012
2 of 152