
Philips Semiconductors
PNX15xx Series
Volume 1 of 1
Chapter 11: QVCP
PNX15XX_SER_3
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 3 — 17 March 2006
11-37
4.
Application Notes
4.1 Special Features
4.1.1
Signature Analysis
Signature analysis is a feature where QVCP calculates a 16-bit signature on the
upper 8 bits of each mixer output separately and sends it to a register which can be
read easily once “sig_done” of the Signature3 register (offset 0x10E058) is set.
QVCP follows a specic CRC algorithm to calculate the signature.
The signature analysis can be done independently on each layer output. Also, the
signatures of data (Alpha, upper, middle, Lower path) and control (misc path, which
consists of vsync, hsync, blank etc.) can be read separately. See the registers with
offsets 0x10E050, 0x10E054 and 0x10E058 for more details.
4.2 Programming Help
The tables below attempt to provide some help in choosing the programming
parameters for some of the video enhancement modules. It is to be noted, however,
that the parameter settings shown below are just example settings that worked well
on a particular experimental picture. One particular setting will not optimize the
enhancement effects for different images (even when they are part of a sequence).
For the real application, the parameters need to be adjusted, by the control software,
according to the measurement results (obtained from assorted measurement units in
other video modules of the parent chip).
Table 12: Programming Values for Supported PNX15xx Series Output Formats
Format
Out_mode
d1_mode
Interlea
ve
Over
sample
c
lk_ratio
T
en-bit Output format
Parallel
2
1
x
1:1 1/0 up: YYYYYY
md: UUUUUU
lo: VVVVVV
D1 interface (422)
0101
1:2 1/0 lo: UYVYUY...stream
D1 Interface (444)
0001
1:3 1/0 lo: YUVYUV...stream
Double D1
1101
1:1 1/0 md: UVUVUVUVUVU
lo: YYYYYYYYYYYY