pnx1700 NXP Semiconductors, pnx1700 Datasheet - Page 584

• Manufacturer Part Number: pnx1700
• Description: Connected Media Processor
• Manufacturer: NXP Semiconductors

1. Introduction
1.
The current MBS implementation can not perform film-mode detection.
Memory-based scaling is done independent of any video clocks by reading the video
data from memory and writing the scaled pictures back to the memory. A single
scaler can therefore be used to scale more than one video stream.
The memory-based scaler can perform the following operations:
•
•
•
•
•
•
•
•
•
Chapter 19: Memory Based Scaler
PNX17xx Series Data Book – Volume 1 of 1
Rev. 1 — 17 March 2006
Vertical and horizontal scaling
–
De-interlacing
–
–
–
–
Anti-flicker filtering
Conversions between 4:2:0, 4:2:2 and 4:4:4
Indexed to true color conversion
Color expansion/compression (different quantizations for color components, e.g.,
RGB565 -> RGB32)
Deplanarization/planarization
Variable color space conversion with programmable matrix coefficients (mutually
exclusive with horizontal scaling)
Color-key and alpha processing
–
–
Linear and non-linear aspect-ratio conversion
Simple median
Majority-selection (median filtering with previous field, spatial temporal
average of 2 fields, same position from next or previous field depending on
whether three or two field majority selection) [Note: majority selection is done
on luma only]
Field insertion
straightforward but doable with programming tricks
Edge-Dependent De-interlacing (EDDI) --- a post-processing step done only
on luma
Conversion between color-key and alpha
Alpha scaling
1
and line doubling ( i.e. , repeating the same line twice). ... not
Preliminary data sheet