To promote the use of the HDMI 2.0 standard, Parade Technologies has released a jitter-cleaning repeater chip called the PS8409. It is designed to remove clock jitter and data jitter/skew from an HDMI 2.0 signal.
The 6Gbps data rate of HDMI 2.0 signals poses a challenge to system designers. Because of this, several HDMI 2.0 systems today use the lower 3Gbps speed and must rely on 4:2:0 subsampling to achieve UltraHD at 60fps. Parade notes that 6Gbps implementation leads to ‘significant’ signal distortion when transmitted across printed circuit board traces, through the connector and through the HDMI cable.
When placed at specific locations within the HDMI signal path, Parade claims that its chip will improve signal integrity. In a video source device, the chip is placed just before the HDMI output receptacle, to maximise outgoing signal quality and increase system design flexibility. In a video receiver, the chip is placed close to the HDMI input receptacle. This placement raises the receiver’s sensitivity and can compensate for longer or damaged HDMI cables.
Parade has fitted the PS8409 with a configurable equaliser on the input side, to overcome signal distortion. The received signal is de-skewed and re-transmitted, using a clear clock reference generated internally.
The PS8409 measures 6mm