GS2971

概览

Please use GS2971A and GS3471 for new designs.

The GS2971 is a multi-rate SDI integrated Equalizer-Receiver which includes complete SMPTE processing, as per SMPTE 425M (Level A and Level B), SMPTE 424M, 292M and SMPTE 259M-C. The SMPTE processing features can be bypassed to support signals with other coding schemes. The GS2971 also performs audio-dembedding and integrates an audio clock generator.

The GS2971 integrates the Gennum® next-generation state-of-the-art adaptive cable equalization technology, achieving unprecedented cable lengths and jitter tolerance. It features DC restoration to compensate for the DC content of SMPTE pathological signals.

本器件具有集成式时钟恢复器，内置 VCO 和 0.7UI 的高输入抖动容限 (IJT)。它提供了串行数字环通输出，可配置为输出时钟恢复或非时钟恢复串行数字数据。串行数字输出可连接至外部电缆驱动器。

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.