SAA7174 반도체 회로 부품 판매점
Analog TV Video and Stereo Decoder
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 Philips |
SAA7174
Analog TV video and stereo decoder for
computing and consumer applications in
Europe
Integrating high-quality, multi-standard TV video (PAL,
SECAM, and NTSC) and TV stereo (NICAM, A2/Dual-FM)
decoding, the Philips SAA7174 gives designers a low-BOM,
space-efficient solution for adding analog TV features to a
variety of computing and consumer products.
Semiconductors
On a single chip, the SAA7174 TV video/stereo decoder detects
and decodes all worldwide analog TV video formats and the TV
stereo formats used throughout Europe. It delivers exceptional
picture quality and advanced video features such as high-quality
ADCs, an adaptive comb filter, subpixel-accurate scaling, and certi-
fied three-level Macrovision detection circuitry. The SAA7174’s
flexible design, reusable components, and versatile external inter-
faces lower BOM and cost and support a variety of TV decoder
configurations.
Key features
> Detects and decodes all worldwide analog TV video formats:
PAL, NTSC, SECAM
> Detects and decodes TV stereo formats used in Europe:
NICAM and A2/Dual-FM
> Adaptive four-line comb filter enhances picture quality
> Certified Macrovision® detection circuitry
> Captures raw VBI data (Teletext, Closed Captioning, etc.)
> Superior subpixel-accurate horizontal and vertical scaling
> Two advanced, low-noise video ADCs with 2x oversampling
> Outputs digital I2S audio and ITU-656 video
> 100% pin compatibility with the SAA7173 decoder
Target applications
The SAA7174 is a space-efficient solution for adding high-quality
multi-standard analog TV decoding to a wide variety of computing
and consumer products. Its 100% pin compatibility with the
SAA7173 decoder enables efficient reuse of SAA7173 designs for
new markets or price points.The SAA7174 is targeted for European
markets in products such as:
> desktop and portable PCs
> hybrid (analog/digital) TV sets
> hybrid cable, terrestrial, and satellite set-top boxes
> USB/1394 video dongles
> DVD recorders and more.
SAA7174
Analog TV video and stereo decoder for computing and consumer applications in Europe
Semiconductors
Analog TV video capture and decoding
The SAA7174 samples analog video through five video inputs
supporting any combination of CVBS and S-Video signals from a
TV tuner or nonstandard sources such as a VCR or camcorder. It
detects all worldwide analog TV video standards (PAL, SECAM,
and NTSC). Video is digitized by sophisticated, nine-bit ADCs
with automatic clamping and programmable gain control to opti-
mize use of the ADCs’ conversion range. Support for 27-MHz
oversampling, twice the ITU-601 standard, ensures an exceptional
signal-to-noise ratio for maximum picture clarity. Additional
features include:
> single crystal support for all video standards
> fast frame lock for fast input-switching in surveillance applica-
tions and VCR fast search, shuttle, and freeze frame
> forced-field toggle for use with non-interlaced inputs (avoids
VCR ‘blue screen’).
The SAA7174 decodes composite video into ITU-601 compatible
component color values. Its high-quality multi-standard adaptive
four-line comb filter performs best-in-class luma/chroma separa-
tion of CVBS signals from all sources, significantly reducing dot
crawl and enhancing image resolution and detail. The decoder
integrates separate brightness-contrast-saturation circuitry for
CVBS, S-Video, and raw VBI samples and hue control for CVBS
and S-Video signals.
The SAA7174 supports certified hardware Macrovision detection
with active-status interrupt. By ensuring the content's original
analog copy protection is still intact, Macrovision prevents unau-
thorized recording of copyrighted material transmitted through
analog video outputs in applications such as time-shift or archive
recording or large screen display.
Scaling, matrix, clipping
The SAA7174 incorporates an adaptive filter and circuitry to crop,
scale, and reduce frame rate. It can peform horizontal or vertical
video down scaling or zooming to support playback windows of
any size. Two alternating settings for active video scaling support
independent capture and preview definition. Adaptive anti-alias
filters reduce board space, cost, and external components.
Optional YUV-to-RGB and RGB-to-YUV matrices and a color
lookup table can be used to normalize ITU-standard color values
to the full RGB range and apply gamma correction as needed to
optimize screen contrast and color.
Typical SAA7174 configurations for analog TV and USB TV dongle
antenna
or cable
VGA TV CARD
TV TUNER
MEMORY
antenna
or cable
USB TV DONGLE
TV TUNER
MEMORY
CVBS
S-Video
audio
audio
line-in
SAA7174
I2C
ITU/VIP
I2S stereo
GRAPHICS
CONTROLLER
AGP bus
stereo audio
(to sound card)
CVBS
S-Video
audio
audio
line-in
SAA7174
I2C
ITU/VIP
I2S stereo
MPEG-2
ENCODER
USB BUS
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
SAA7173
Analog TV Video and Stereo Decoder - Philips
SAA7174
Analog TV Video and Stereo Decoder - Philips