smart-e 4K-RX9000, User Manual

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4K-9000 USER MANUAL V1.1
© 2018 Smart-e (UK) Ltd www.smart-e.co.uk PAGE | 43
The general overview of a HDMI, TMDS signal is shown in the below example. This example is based on a HDMI
output where the pixels are in RGB format, HDMI may also output pixels in YCbCr format, which is the common
output for video sources such as Blu-ray players.
It can be seen above that there are 10-bits per TMDS clock cycle, the 8-bit colour data has been encoded in
to a 10-bit TMDS word. Each TMDS clock cycle is equal to 1-pixel worth of information. In the below example
the resolution is the same as above, but the colour depth has increased to 10-bit.
The dotted lines show the data as it was for the 8-bit example. It can be seen there are now 12-bits per pixel,
but the TMDS clock has had to increase in frequency to complete one cycle every 10 TMDS data bits. A source
capable of deep colour output will be able to manipulate the TMDS clock to this increased frequency, however
it must be attached to a screen which is also deep colour capable. A deep colour capable screen will recognise
that the TMDS clock has been increased and then be able to interpret the colour information being received
correctly, mapping it to the correct pixels. If a deep colour input is applied to a non-deep colour screen you will