Overview: DATASHEET Quad (SD/HD) SDI Receiver with Adaptive Equalizer, VC-2 Decoder and Audio CODEC TW6874
The TW6874 is a quad (SD/HD) SDI receiver. It has four independent channels, each consisting of an adaptive equalizer, clock data recovery, audio decoder and VC-2 decompression engine. Each channel receives high speed serial data over extended coaxial cable lengths and deserialize the data into video/audio streams for the back-end device.
The video streams are output as: 8-bit BT.656 for SD; BT.1120 in 8/16 bit mode for HD. The audio streams are output through an I2S audio digital interface in a multichannel interleaving format. In addition to the extraction of embedded SDI audio, the TW6874 incorporates a 5-channel audio ADC decoder to decode analog audio inputs and output them through the same I2S interface.
A visually lossless VC-2 (Dirac) compression/decompression engine is implemented in the TW6872/TW6874 SDI Tx/Rx pair to extend the reach of HD-SDI to that of SD-SDI. An interrupt pin can be used to signal the host processor of ancillary data packet detection. Finally, integrated audio test patterns and PRBS checker ease system design and implementation.
