PNX2000 datasheet(13/31 Pages) PHILIPS

13 / 31 page

9397 750 13928

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 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

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 streams from 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, 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.

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