VX6953CB datasheet(53/107 Pages) STMICROELECTRONICS

53 / 107 page

8209023 Rev 5

53/107

VX6953CB

Video timing

Figure 16. Scaling modes

Scaler quality

The scaler supports two options for the spatial sampling of the scaled image data: (see

Figure 17):

•

Bayer sampled scaled image data

The sampling point for the scaler for the output Gr value appears to be in the centre of

the Gr pixel (i.e. between the 1st and 2nd pixels and between the 1st and 2nd rows of the

original input Bayer pixel data). The R (or B) sampling points are similarly in the centre

of the R pixel (or B pixel).

•

co-sited scaled image data

The sampling point for the Gr, R. Gb and B vales in each output ‘quad’ are functions of

the same colour input array pixels such that the spatial sampling point for all four

appears to be in the centre of the ‘quad’ i.e. between the 2nd and 3rd pixels and

between the 1st and 2nd rows.

The spatial sampling mode is controlled by the spatial_sampling register.

Figure 17. Scaler quality

Pixel array output

scaling_mode register

VX6953CB output

0- no scaling

1- horizontal scaling

2- Full scaling

(horizontal and vertical)

Pixel array output

Bayer sampled scaling

Co-sited sampling

VX6953CB Datasheet(PDF) 53 Page - STMicroelectronics