Document
GS1670
HD/SD SDI Receiver Complete with SMPTE Audio and Video Processing
Key Features
• Operation at 1.485Gb/s, 1.485/1.001Gb/s and 270Mb/s • Supports SMPTE 292, SMPTE 259M-C and DVB-ASI • Integrated Reclocker with low phase noise, integrated
VCO • Serial digital reclocked, or non-reclocked loop-through
output • Integrated audio de-embedder for 8 channels of 48kHz
audio • Integrated audio clock generator • Ancillary data extraction • 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 300mW) • Small 11mm x 11mm 100-ball BGA package • Pb-free and RoHS compliant
Errata
Refer to Errata document entitled GS1670/GS1671 Errata for this device (document number 53878).
Applications
HD-SDI
Application: 1080p30 or 720p60 Monitor
EQ (GS1574A or GS2984)
AES - OUT
GS1670
AUDIO 1/2 AUDIO 3/4 AUDIO 5/6 AUDIO 7/8 Audio Clocks
Audio Selector
20-bit
HV F/PCLK
Video Processor
C TR L/TIMECODE
DAC
Speakers
DAC
Display
Application: Multi-format Downconverter
SD/HD-SDI
EQ (GS1574A or
GS2984)
GS1670
20-bit
HV F /P CLK
10-bit SD Bypass
Memory
Video Downconverter&
Aspect Ratio Conversion
20-bit
HD/SD Serializer (GS1672)
HD/SD-SDI
Analog Sync
Sync Seperator
GS4901
AES 1/2 AES 3/4 AES 5/6 AES 7/8
Audio Clocks
HV F / P CLK
Audio Processing &
Delay
AES 1/2 AES 3/4 AES 5/6 AES 7/8
Application: Multi-input Video Monitoring System
HD-SDI Input 1
EQ (GS1574A or GS2984)
HD-SDI Input 2
EQ (GS1574A or GS2984)
GS1670
20-bit
HV F / P CLK
GS1670
20-bit
HV F / P CLK
Video Memory
Video Formatter
HV /DE /P CLK
DVI/ VGA DAC
Video Output
HD-SDI Input n
EQ (GS1574A or GS2984)
Analog Sync
Sync Seperator
GS1670
20-bit
HV F / P CLK
AES BUS
GS4911
Audio Select
HV F /P CLK
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
GS1670 HD/SD SDI Receiver
Data Sheet
53831 - 2
September 2012
www.semtech.com
1 of 126
Application: Multi-format Audio De-embedder Module
SD/HD-SDI
EQ (GS1574A or GS2984)
10-bit
P CLK
GS1662
SD/HD-SDI
GS1670
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-SDI
EQ (GS1574A or GS2984)
GS1670
20-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 GS1670 is a multi-rate SDI Receiver which includes complete SMPTE processing, as per SMPTE 292 and SMPTE 259M-C. The SMPTE processing features can be bypassed to support signals with other coding schemes.
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 GS1670 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 GS1670 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.
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 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 multiplexed format for HD and SD video rates. The associated Parallel Clock input signal operates at 148.5 or 148.5/1.001MHz (HD 10-bit multiplexed modes), 74.25 or 74.25/1.001MHz (for HD 20-bit mode), 27MHz (for SD 10-bit mode) and 13.5MHz (for SD 20-bit mode).
Up to eight channels, in two groups, of serial digital audio may be extracted from the video data stream, in accordance with SMPTE 272M and SMPTE 299M. The output signal formats supported by the device include AES/EBU and three other industry standard serial digital formats. 16.