SAB9076H Datasheet, PDF (2/32 Pages) NXP Semiconductors – Picture-In-Picture PIP controller

Philips Semiconductors
Picture-In-Picture (PIP) controller
Preliminary specification
SAB9076H
FEATURES
Display
• Twin PIP in interlaced mode at 8-bit resolution
• Sub-title mode features built in
• Large display fine positioning area, both channels
independent
• Only 2 Mbit required as external VDRAM
(2 × 1 Mbit or 1 × 2 Mbit)
• Four 8-bit Analogue Digital Converters (ADCs; > 7-bit
performance) with clamp circuit
• Most PIP modes handle interlaced pictures without joint
line error
• Two PLLs which generate the line-locked clocks for the
acquisition channels
• Display PLL to generate line-locked clock for the display
• Three 8-bit Digital Analogue Converters (DACs)
• 4 : 1 : 1 data format
• Data reduction factors 1 to 1, 1 to 2, 1 to 3 and 1 to 4,
horizontal and vertical independent.
I²C-bus programmable
• Single and double PIP modes can be set
• Full field still mode available
• Several aspect ratios can be handled
• Reduction factors can be set freely
• Selection of vertical filtering type
• Freeze of live pictures
• Fine tuned display position, H (8-bit), V (8-bit),
both channels independent
• Fine tuned acquisition area, H (4-bit), V (8-bit),
both channels independent
• Eight main borders, sub-borders and background
colours selectable
• Border and background brightness adjustable, 30%,
50%, 70% and 100% IRE
• Several type of decoder input signals can be set.
GENERAL DESCRIPTION
The SAB9076H is a picture-in-picture controller for NTSC
TV-sets. The circuit contains ADCs, reduction circuitry,
memory control, display control and DACs.
The device inserts one or two live video signals with
original or reduced sizes into a live video signal. All video
signals are expected to be analog baseband signals.
The conversion into the digital environment and back to
the analog environment is carried out on chip. Internal
clocks are generated by two acquisition PLLs and a
display PLL.
Due to the two PIP channels and a large external memory
a wide range of PIP modes are offered. The emphasis is
put on single-PIP, double-PIP, split-screen mode and a
many multi-PIP modes.
1996 Aug 13
2