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GS2970A Datasheet(PDF) 2 Page - Semtech Corporation |
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GS2970A Datasheet(HTML) 2 Page - Semtech Corporation |
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2 / 150 page  GS2970A 3Gb/s, HD, SD SDI Receiver Data Sheet 54244 - 2 September 2012 2 of 150 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. Application: Multi-format Audio De-embedder Module PCLK 10-bit GS2962 DAC Switch Logic & Drivers Analog Audio Outputs AES Audio Outputs AUDIO 1/ 2 AUDIO 3/ 4 AUDIO 5/ 6 AUDIO 7/ 8 Audio Clocks SD/HD/3G-SDI GS2970A SD/HD/3G-SDI EQ GS2984/ GS2974 Application: Multi-format Digital VTR/Video Server Storage: Tape/HDD/Solid State Audio Processor Video Processor 20-bit HV F/P CLK Audio Outputs V ideo Output Audio Clocks AUDIO 1/ 2 AUDIO 3/ 4 AUDIO 5/ 6 AUDIO 7/ 8 SD/HD/3G-SDI GS2970A EQ GS2984/ GS2974 |
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