Interface converter takes HDMI to MIPI for small screens

September 27, 2013 // By EDN
A chipset enables HDMI video streams to be processed and displayed on small form factor LCD displays

Toshiba Electronics' T358779XBG High Definition Multimedia Interface (HDMI) to MIPI Display Serial Interface (DSI) bridge IC is claimed to be the first device to enable HDMI video and audio output to be converted and processed as a MIPI DSI video stream for the small form-factor LCD displays used in many consumer and industrial applications.

The IC enables the application processors used to drive traditional larger displays to also interface with smaller, mobile consumer and industrial products fitted with small form-factor LCD displays that require MIPI DSI input.

By providing integrated on-chip support for video processing, video de-interlacing, video scaling and video format conversion, the T358779XBG significantly reduces memory bandwidth and video processing requirements on the host processor. Up-down scaling and colour-space conversion allows output from the application processor to be formatted and scaled to match the display panel’s output resolution and colour format.

Toshiba’s T358779XBG supports common 3D video formats and protocols compatible with the HDMI 1.4 standard at resolutions up to 1920 x 1200 and refresh rates of 60fps. Interface speeds of up to 4 Gbps to an LCD display panel are achieved using four data lanes at a maximum 1 Gbps/lane link speed.

Multiple audio interfaces including I 2S, TDM, S/PDIF and MIPI Serial Low-power Inter-chip Media Bus (SLIMbus) audio formats are supported making the IC suitable for a wide range of audio video applications. Available as an 80-pin device for non-HDMI boards, it measures 7.0 x 7.0 mm, with 0.65 mm ball pitch and 1.0 mm maximum height.