Philips PNX2000

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 1fH and 2fH video input source.

•Standard detection of PAL, NTSC or SECAM and various 1fH and 2fH component

video input sources.

1fH 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.

2fH video

•Support for various progressive and interlaced component video sources.

•Synchronization of video sources with sync on Y or e xternal 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.

F ormatter 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

I2C-bus The PNX2000 IC is controlled using an I2C-bus. It performs like an I2C-bus to PI-bus

bridge, i.e. translates I2C-bus slave received commands to PI-bus master commands.

I2D Receives data in three strea ms fro m PNX3000.

I2S-bus Serial digital audio interface (6 stereo inputs, 6 stereo outputs) for connection to other

devices that support the I2S-bus standard. Can be used to receive decoded sound

from a multi-channel digital audio decoder, pro vide additional ADCs and DA Cs, 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.