em8471 ETC-unknow, em8471 Datasheet - Page 5

• Manufacturer Part Number: em8471
• Description: Mpeg Decoder Set-top Streaming Applications
• Manufacturer: ETC-unknow

Alpha Blending
Alpha blending provides two layers of blending: sub-picture
over the MPEG video and OSD over both the sub-picture
and MPEG video. Up to 16 levels of blending are available.
Video Input and Output Interfaces
Video output ports provide digital RGB or YCbCr outputs and
include an integrated NTSC/PAL video encoder and video
DACs for composite, s-video and component analog outputs.
VBI Support
NTSC closed captioning on lines 21 and 284 is supported. In
addition, NTSC widescreen signaling (WSS) and copy gen-
eration management (CGMS-A) on lines 20 and 283, as
defined by IEC 61880, is supported. This information speci-
fies the aspect ratio of the current program and also provides
copy protection capabilities.
PAL widescreen signaling (WSS) on line 23, as defined by
ETSI EN300284 and ITU-R BT.1119, is supported. This infor-
mation specifies the aspect ratio of the current program.
Digital Video Output
The digital video output, controlled by the video display con-
troller, supports 8- / 16-bit CCIR 601 / 656 4:2:2 YCbCr data.
An additional 24-bit RGB output mode is supported on the
EM8475 and EM8476. It may be operated as a timing master
or slave at rates up to 80 MHz (160 MBps) and resolutions
up to 720p or 1080i.
The 24-bit RGB output mode supports HDCP (High-band-
width Digital Content Protection) when interfaced to a DVI
transmitter chip.
TV Encoder - Composite and S-Video Output
A high-quality NTSC/PAL encoder (with optional Macrovision
v7.1 protection) that supports the NTSC-M, NTSC-J, PAL-
B/D/G/H/I, PAL-60 and PAL-M baseband video standards is
available. It features three 10-bit video DACs to generate
simultaneous composite and s-video outputs. The analog
video outputs are capable of driving a doubly-terminated 75-
ohm load.
355 Fairview Way • Milpitas, CA, USA 95035 • Tel: [phone] • Fax: [phone]
www.sigmadesigns.com • [e-mail]
Sigma Designs, Inc.
Component Analog Output
The EM8475 and EM8476 also include component YPbPr or
RGB analog outputs, with optional Macrovision AGC v1.03
protection in 480p YPbPr mode. This component analog out-
put can be programmed to be either RGB or YPbPr video
data, interlaced or progressive, from NTSC / PAL resolution
up to 1920x1080. The analog video outputs are capable of
driving a doubly-terminated 75-ohm load.
When generating analog RGB or YPbPr video, the compos-
ite video output is always present; the s-video output is not
available.
Supported analog formats are:
If copy protection is used during DVD-Video playback, the
resolution on the EM8475 analog YPbPr / RGB outputs may
not be higher than standard definition (720x480 or 720x576)
unless driving a VGA monitor. If the output is configured to
be progressive YPbPr, only 480p video may be generated.
Digital Video Input
The video input port, available only on the EM8475 and
EM8476, is designed to capture video data in 8- / 16-bit
CCIR 601 / 656 YCbCr video data formats. The capture port
must operate in slave mode, synchronized to the input clock
and sync signals. The capture port is designed to support
video rates up to 80 MHz (160 MBps) and resolutions up to
720p or 1080i.
This input may be converted to progressive using either field
merging or scan line interpolation.
Note that only one video stream can be displayed at a time -
either MPEG video or input video.
• RGB and composite video for SCART support
• RGB with sync on green
• SMPTE GBR
• Betacam YUV
• M-II YUV
• SMPTE YPbPr
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