9397 750 13928 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data Rev. 03 – 23 August 2004 16 of 31
Philips Semiconductors PNX2000
Audio video input processor
•Serial data link interfacing for analog multi-purpose interface PNX3000.

8. Television application

Figure 3 shows an overview of the top level hardware architecture of a TV application,

using the PNX3000 and PNX2000 as an analog front-end and the PNX8550 as the main

processor. This system is aimed at the hybrid (analog or digital) TV market.

The main SOC in the system, PNX8550, performs key features for high quality television

like video quality enhancement, motion compensation and picture-in-picture processing.

PNX2000 together with PNX3000 are used to perf orm the input decoding of a single

stream of analog audio and a single stream of analog video (1fH or 2fH) broadcast signals.

PNX2000 performs the following main functions:

•Color decoding into ITU-601 compatible format (1fH or 2fH).
•A digital interface to external 3D comb filter.
•VBI data capture (Teletext, WSS, CC).
•ITU-656 formatting for communication to PNX8550.
•Audio demodulation and decoding.
•Audio processing and D-A conversion.

The audio data is transferred between PNX2000 and PNX8550 using I2S-bus. PNX2000

and PNX3000 are co ntrolled from PNX8550 via the I2C-bus.

Fig 3. TV application
mce558
PNX8550
YUV (656)
CVBS
audio I
2
S-bus
audio I
2
S-bus
(2×)
RGB
10 bits (3×)
32-bit
8-bit or 16-bit
audio I
2
S-bus 
(3×)
DISPLAY
PROCESSOR
RGB
AMPLIFIER
DEFL.
CONT.
AUDIO
AMPLIFIER
PNX2000
PNX3000
STANDBY
MICRO-
CONTROLLER
TUNERS
UV1316
UV13361
LEVEL ADJUSTMENT
REMOTE CONTROL
LOCAL KEYPAD
I
2
D
SIF
status
SCART
VIF
CVBS Y/C
RGB 2
L/R audio 2
CVBS 1
L/R audio 1
L/R
audio
DDR
16 Mb
FLASH
ROM
18 Mb
2
4
6
8
10
12
14
11
13
16
18
15
17
19
20 21
2
4
6
8
10
12
14
11
9
7
5
3
1
13
16
18
15
17
19
20 21