SAA7118 データシートの表示（PDF） - Philips Electronics

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SAA7118

Multistandard video decoder with adaptive comb filter and component video input

Philips Electronics 

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-CB-CR

– 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-CB-CR

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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