srcW
offW
orgW
orgH
of
fH
srcH
YCbCr
422
Trimmer
Peaking
Vertical
Scalar
Horizontal
Scalar
FIFO
YCbCr
422
VS Ver Coef Mem
32 phase x 5 tap
(Polyphase filter)
HS Coef Mem
32 phase x 7 tap
Internal Modules
192
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
The SC (
) is used in the video path and in all other video write-back data paths in the
HDVPSS module.
Scaling is performed in following three steps:
1. Trimming and Pre-peaking filtering
2. Vertical Scaling (Polyphase/Running Average Filter)
3. Horizontal polyphase scaling
Figure 1-140. SC Block Diagram
1.2.11.2.1 Trimmer
The trimmer can be programmed to re-define a new source image within the input video frame sent from
an upstream module before it is sent to the scaling sub-modules. This feature enables small area zoom
out, source pan/scan, or removal of unwanted area in the video (such as black box/curtains/noisy line-21
video) without modifying the VPDMA parameters.
Figure 1-141. Input Image Trimming
