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9397 750 13928 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data Rev. 03 – 23 August 2004 13 of 31
Philips Semiconductors
PNX2000
Audio video input processor
7.2 Interfaces
7.3 Features in detail
7.3.1 Video
• Automatic Gain Control (AGC) to correct amplitude errors at input source.
• Synchronization identification (used for channel search).
• Sync processing for 1f
H
and 2f
H
video input source.
• Standard detection of PAL, NTSC or SECAM and various 1f
H
and 2f
H
component
video input sources.
1f
H
video
• Color decoding (ITU-601) for PAL, NTSC or SECAM input sources.
• 2D comb filtering.
• Support for component video sources with sync on CVBS or green.
• Fastblank insertion of RGB signals onto CVBS input.
2f
H
video
• Support for various progressive and interlaced component video sources.
• Synchronization of video sources with sync on Y or external H/V inputs.
VBI data capture
TV sound decoder DEMDEC
DSP
Demodulation, decoding of terrestrial TV audio standards
.
Audio processor AUDIO DSP Processing analog and digital audio sources.
Data Capture Unit DCU Acquires VBI data (Teletext; CC; VPS) and formats in a
stream.
Formatter unit ITU-656 Formats YUV, VBI data and CVBS data in ITU-656.
Bus Control Unit BCU Bus arbitration among all the internal blocks.
Table 17: Block function
…continued
Function Block Description
Table 18: Interfaces
Interface Description
I
2
C-bus The PNX2000 IC is controlled using an I
2
C-bus. It performs like an I
2
C-bus to PI-bus
bridge, i.e. translates I
2
C-bus slave received commands to PI-bus master commands.
I
2
D Receives data in three streams from PNX3000.
I
2
S-bus Serial digital audio interface (6 stereo inputs, 6 stereo outputs) for connection to other
devices that support the I
2
S-bus standard. Can be used to receive decoded sound
from a multi-channel digital audio decoder, provide additional ADCs and DACs, or loop
audio signals through an external processor or delay line.
ITU-656 Mainly intended to transfer output data stream externally to the PNX8550, but the
output data stream could also be readable by other ITU-656 input devices that
implement data valid signalling.
DACS Digital-analog converters used to generate analog outputs from Sound Core.