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3G-, HD-, SD-SDI and DVB-ASI Receiver Complete with SMPTE Audio and Video Processing

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Description

The GS2970A is a multi-rate SDI Receiver which includes complete SMPTE processing, as per SMPTE 425M, 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 default operating mode), the GS2970A 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.

Features


  • Operation at 2.970Gb/s, 2.970/1.001Gb/s, 1.485Gb/s, 1.485/1.001Gb/s and 270Mb/s
  • Supports SMPTE 425M (Level A and Level B), SMPTE 424M, SMPTE 292, SMPTE 259M-C and DVB-ASI
  • Integrated Reclocker
  • Integrated low phase noise 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
  • Optional conversion from SMPTE 425M Level B to Level A for 1080p 50/59.94/60 4:2:2 10-bit inputs
  • 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 350mW)
  • Small 11mm x 11mm 100-ball BGA package
  • Pb-free and RoHS compliant
 

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