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