Flow Of Image Processing - Fujitsu MB86R02 Jade-D Hardware Manual

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MB86R02 'Jade-D' Hardware Manual V1.64

Flow of image processing

Captured images displayed on the L1 layer window are subject to the image processing flow shown

(1) Non-interlaced interpolation processing

When the VI (vertical interpolation) bit of the video capture mode register (VCM) is 0, an interlaced

screen is interpolated vertically using the data from the same field. A screen is doubled vertically.

When VI is 1, it is not interpolated vertically.

(2) Horizontal low-pass filter processing

When scaling a picture horizontally, a preprocessing low-pass filter can be applied, regardless of

whether the picture is being up- or downscaled in order to optimize picture quality. For more

detailled knowledge in this complex field, please refer to external sources such as: `Video

processing for multimedia systems', by Gerard de Haan I SBN: 90-9014015-8, Eindhoven Sept.

The horizontal low-pass filter consists of FIR filters (finite impulse response filters) with five taps.

Coefficients are specified in the CLPF (Capture Low Pass Filter) register:

The coefficients are specified by a 2-bit coefficient code set independently for the luminance (Y)

signal and chrominance (Cb and Cr) signals. The coefficient is a symmetric coefficient.

Color conversion

Non-interlace

interpolation

656(YUV422),RGB

down scaling

interpolator

Figure 8.1 Flow of image processing

Horizontal LPF Luminance element and RGB element

coefficient code

Horizontal LPF chrominance element coefficient code

down scaling

interpolator

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