Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 132 Q528.1E LA9.
9.6 PNX8535
In this chassis, the PNX8535 is responsible for the audio/video
source decode functions and video improvement processing
on both digital and analogue sources. It includes a multi-
standard digital video decoder for MPEG2, and a multi-
standard analogue video decoder for support of PAL, NTSC,
and SECAM standards. Refer to diagram B04 for details.
9.6.1 Video Subsystem
Refer to figure “Video flow diagram” for a clarification of the
blocks that are used in this device.
Figure 9-10 PNX8535 video flow diagram
The Analogue Video Front-End (AVFE) provides the interface
to external analogue baseband video sources and IF inputs. It
supports the following inputs:
• 1fh - CVBS, Y/C, YPbPr, RGB.
• 2fh - YPbPr, RGB.
• IF - low-IF, SSIF.
The Video Capture Pipe (VCP) is used to capture analogue
video inputs and consists of a number of blocks:
• The VCP-RX block that contains digital IF processing, a
Video Decoder, a 3D-combfilter, and a VBI-Data Capture
unit together with a number of smaller control functions.
• The VCP-PSUD which allows VBI data, such Teletext and
Closed Captioning, to be stored in memory.
• The VCP-PSUV which allows captured video data to be
stored in memory.
The HDMI receiver interface supports the capture of signals
compliant with the HDMI V1.1 specification. It consists of two
blocks:
• Block HDMI-RX contains the de-serialiser, HDCP, audio
and video data capture and info packet extraction, together
with audio formatting.
• Block HDMI-RX2DTL allows captured video data to be
stored in memory.
The Memory Based Video Processor TV (MBVP_L2TV) is
used on the main video channel for de-interlacing and scaling
of images, together with video measurement functions.
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