SAA7118 Datasheet, PDF (4/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
1.6 Audio clock generation
• Generation of a field-locked audio master clock to
support a constant number of audio clocks per video
field
• Generation of an audio serial and left/right (channel)
clock signal.
1.7 Digital I/O interfaces
• Real-time signal port (R port), inclusive continuous
line-locked reference clock and real-time status
information supporting RTC level 3.1 (refer to document
“RTC Functional Specification” for details)
• Bidirectional expansion port (X-port) with half duplex
functionality (D1), 8-bit Y-C_B-C_R
– Output from decoder part, real-time and unscaled
– Input to scaler part, e.g. video from MPEG decoder
(extension to 16-bit possible)
• Video image port (I-port) configurable for 8-bit data
(extension to 16-bit possible) in master mode (own
clock), or slave mode (external clock), with auxiliary
timing and handshake signals
• Discontinuous data streams supported
• 32-word × 4-byte FIFO register for video output data
• 28-word × 4-byte FIFO register for decoded VBI-data
output
• Scaled 4 : 2 : 2, 4 : 1 : 1, 4 : 2 : 0, 4 : 1 : 0 Y-C_B-C_R
output
• Scaled 8-bit luminance only and raw CVBS data output
• Sliced, decoded VBI-data output.
1.8 Miscellaneous
• Power-on control
• 5 V tolerant digital inputs and I/O ports
• Software controlled power saving standby modes
supported
• Programming via serial I²C-bus, full read back ability by
an external controller, bit rate up to 400 kbits/s
• Boundary scan test circuit complies with the “IEEE Std.
1149.b1 - 1994”.
2 APPLICATIONS
• PC-video capture and editing
• Personal video recorders (time shifting)
• Cable, terrestrial, and satellite set-top boxes
• Internet terminals
• Flat-panel monitors
• DVD-recordable players
• AV-ready hard-disk drivers
• Digital televisions/scan conversion
• Video surveillance/security
• Video editing/post production
• Video phones
• Video projectors
• Digital VCRs.
3 GENERAL DESCRIPTION
The SAA7118 is a video capture device for applications at
the image port of VGA controllers.
Philips X-VIP is a new multistandard comb filter video
decoder chip with additional component processing,
providing high quality, optionally scaled, video.
The SAA7118 is a combination of a four-channel analog
preprocessing circuit including source selection,
anti-aliasing filter and ADC with succeeding decimation
filters from 27 to 13.5 MHz data rate. Each preprocessing
channel comes with an automatic clamp and gain control.
The SAA7118 combines a Clock Generation Circuit
(CGC), a digital multistandard decoder containing
two-dimensional chrominance/luminance separation by an
adaptive comb filter and a high performance scaler,
including variable horizontal and vertical up and
downscaling and a brightness, contrast and saturation
control circuit.
2001 May 30
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