EM8471_技术文档

EM8470 EM8475

EM8471 EM8476

MPEG-4 Decoder for Set-top, DVD and Streaming Applications

Description

Common Features

•

Pin and functionally compatible with EM8400

(EM8470 and EM8471 only)

The EM847x family is a single-chip MPEG audio/video decoder that supports

DVD-Video, Superbit™ DVD, SVCD, VCD and audio CD media formats.

Video decoding support includes MPEG-1, MPEG-2 MP@ML and MPEG-4

advanced simple video profile Level 5¹. Audio decoding support includes

Dolby^®Digital, MPEG-1 Layers 1 and 2, MPEG-4 high quality profile Level 2,

and 16-bit linear PCM. DVD-Video support includes hardware CSS decryp-

tion, 16:9 and 4:3 aspect ratios, letterboxing, 3:2 pull-down, multiple angles

and sub-picture.

Based on the company’s award-winning REALmagic^®Video Streaming Tech-

nology, the EM847x family provides highly-integrated solutions for high-qual-

ity decoding of MPEG-1, MPEG-2 and MPEG-4. Positioned as a cost-

effective solution for streaming video clients, advanced digital set-top boxes

and next-generation interactive DVD players, the EM847x enables manufac-

turers to easily incorporate streaming video, progressive DVD playback and

video-on-demand into their products.

•

Compatible with MPEG-4 Client Players from

Envivio and iVAST and a wide variety of

MPEG-2 video servers

•

Supports ISMA and MPEG-2 streaming

formats, IP multicasting

Supports DVD-Video, Superbit DVD, SVCD,

VCD, audio CD media formats

MPEG-1, MPEG-2 MP@ML, MPEG-4

1

Advanced Simple Profile Level 5 video

decoding

•

Dolby Digital, MPEG-1 Layers 1 and 2, MPEG-

4 High Quality Profile Level 2, and linear PCM

audio decoding

Block Diagram

4 MB SDRAM

SDRAM CONTROLLER

CVBS

NTSC/PAL

ENCODER

S-VIDEO

V

DAC

IDEO

CCIR 601 / 656

8 / 16-BIT YCBCR

D

ISPLAY

A

NALOG RGB /YPBPR

A

V

UDIO

IDEO

MPEG

S

A

UDIO

ECODER

NGINE

CONTROL

,

DVD

ECRYPT

V

IDEO

ECODER

ENGINE

24-BIT RGB,

8 / 16-BIT YC

D

OSD,

S

I

P

NPUT

ORT

D

BCR

E

UB

-

I2S

AUDIO

PICTURE

STEREO

AUDIO

DAC

S

I2S OR SPDIF

PCI

L

OCAL

B

US

L

OCAL Bus

HOST

CONTROLLER

I

NTERFACE

Lightly shaded blocks are only available on the EM8475 and EM8476

PCI

1

Without 1/4 pixel and global motion compensation

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

EM8470, EM8471, EM8475, EM8476

Common Features

Bitstream Demultiplexing

•

Programmable display output with improved

scaling up to 1920x1080 resolution, interlaced

or progressive, up to 120 Hz refresh

The host processor performs MPEG-4 file demultiplexing and system decod-

ing (except audio and video decoding), MPEG-2 transport and program

stream and MPEG-1 system stream demultiplexing. The EM847x operates as

a PCI bus master while audio and video elementary streams are transferred

from host system memory to EM847x memory by the EM847x’s DMA engine.

•

2-, 4-, 7- or 8-bit OSD with optional run-length

compression, alpha blending and flicker

filtering

Software drivers for the x86, available from Sigma Designs, include MPEG-4

audio decode, MPEG-2 transport and program stream demultiplex, MPEG-1

system stream demultiplex and DVD-Video/SVCD/VCD stream demultiplex

and navigation. Supported operating systems for our x86-based reference

designs include Windows^®XP Embedded, Windows CE .NET and Linux. For

other operating systems and hardware platforms, our Professional Services

Group can assist in supporting your requirements.

•

80 MHz digital video output interface: 8- or 16-

bit CCIR 601 / 656 YCbCr

Improved NTSC/PAL composite and s-video

outputs with optional Macrovision v7.1

protection and VBI data support (10-bit DACs)

•

Digital audio output interface: I2S for PCM or

S/PDIF (IEC 60958) for PCM, compressed

Dolby Digital and compressed DTS

DVD-Video Decryption

The EM847x includes decryption logic and supports DVD-Video CSS proce-

dural specifications. It also fully supports DVD-Video control features includ-

ing up to 8 language sound tracks, 32 subtitle settings, letterbox, pan and

scan, multi-angles and 3:2 pull-down.

•

Improved PCI v2.1 bus master / slave interface

supports both read and write operations

2.5V core with 3.3V I/O (5V tolerant) for low

power operation

Package: 208 PQFP for EM8470 and EM8471

(pin compatible with EM8400), 328 BGA for

EM8475 and EM8476

MPEG Video Decoding

The MPEG video decoder engine contains the following modules used for

MPEG-1, MPEG-2 and MPEG-4 video decoding:

EM8475 / EM8476 Features

•

MPEG-1 & 2 Huffman Decoder

MPEG-4 Huffman Decoder

Motion Compensation

IDCT

•

Digital audio input interface: I2S

•

80 MHz digital video input interface: 8- or 16-

bit CCIR 601 / 656 YCbCr supporting

resolutions up to 1920x1080i

•

80 MHz 24-bit digital RGB output interface for

DVI with HDCP support

Inverse Quantizer

AC / DC Predictor

Interlaced or progressive analog RGB or

YPbPr video outputs with optional Macrovision

AGC v1.03 protection and VBI data support

(10-bit DACs)

The Huffman Decoder receives bitstream data from DRAM and works in col-

laboration with the internal RISC processor to decode bitstream elements

down to the block level. It then decodes transformed coefficients and sends

them to the Inverse Quantizer. The Inverse Quantizer mainly performs two

consecutive multiplications on the transformed coefficients (quantizer scale

and quantizer matrix) and sends them to the IDCT. The IDCT converts them

into pixels (or pixel differences for non-intra pictures), which are sent to the

Motion Compensation block. The Motion Compensation block loads decoded

macroblocks from DRAM (for prediction), adds the pixel differences and

stores the result back to DRAM.

•

Stereo audio DACs

Flexible Local Bus interface

Applications

•

Consumer products needing PVR and

playback of video-on-demand (VOD),

streaming video, progressive DVD

•

Set-top boxes, media/home gateways, video

end points, convergence appliances

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 2 -

EM8470, EM8471, EM8475, EM8476

MPEG-1 and MPEG-2 Huffman Decoder

AC/DC Predictor

The MPEG Video Decoder engine uses the Huffman

Decoder as its front end. It can decode either a MPEG-1 or

MPEG-2 formatted data stream. The Huffman Decoder is

commanded directly from the RISC processor. It extracts

fixed-length, variable-length or start codes from the bitstream

and returns the value to the RISC processor or passes it

directly to the Inverse Quantizer. The Huffman Decoder can

also do tasks such as decode the macroblock increment

address, get the macroblock type, get coded block pattern,

get motion vector codes and decode a delta motion vector.

If the input stream is MPEG-1 or MPEG-2, the AC/DC predic-

tor passes through. Otherwise, it receives data from the zig-

zag through a 19-bit stream interface. A predictor is added to

the incoming AC/DC coefficients. The result is saturated and

output to the inverse quantizer through a similar interface.

This result will also be used as future predictors. For predic-

tion, this block must save an entire macroblock line of infor-

mations. This module supports MPEG-4 simple profile.

Inverse Quantizer

The Inverse Quantizer block resides between the AC/DC

predictor block and the inverse DCT block. Its primary func-

tion is to receive coefficients from the AC/DC predictor, scale

them and send them to the IDCT. It supports the MPEG-1,

MPEG-2 MP@ML and MPEG-4 simple profile.

MPEG-4 Huffman Decoder

The MPEG-4 Huffman Decoder is the front-end to the

MPEG-4 engine. It provides specialized instructions to the

RISC processor to enable the decoding of Simple Profile

MPEG-4 streams. These instructions are of three different

kinds: get or view a fixed-length bit field, get an individual

variable length code and get the DCT coefficients for the

whole macroblock. Additionally, the Huffman Decoder pro-

vides support for the error-resiliency features of MPEG-4. It

can be used to read data-partitioned Video Object Planes,

with or without Reversible Variable Length Codes (RVLCs). It

cannot, however, read RVLCs backwards.

Inverse DCT

The IDCT (Inverse Discrete Cosine Transform) module is a

hardware implementation of the DCT/IDCT of an 8x8 pixel

block used in MPEG compression/ decompression. The DCT

transforms a block of 8x8 pixels into a block of 8x8 trans-

formed coefficients. The IDCT transforms a block of 8x8

transformed coefficients back into a block of 8x8 pixels.

Video Decoder Block Diagram

DRAM

ACDC_OUT

AC/DC

SDRAM CONTROLLER

PREDICTOR

MPEG MISC

ACDC_IN

TIMER

IRQ CNTRL.

RESET CNTRL.

RBUS INF.

IDCT

ZIGZAG

MOTION

COMPENSATION

MPEG-4

HUFFMAN

INVERSE

QUANTIZER

MPEG-1&2

HUFFMAN

R-BUS

D-BUS

DMEM

PMEM

PCI BUS

INTERFACE

16-BIT

RISC CORE

PCI BUS

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 3 -

EM8470, EM8471, EM8475, EM8476

Motion Compensation Module

Video Display Controller

The display controller reads picture data from DRAM and

displays it with proper format, timing and synchronization sig-

nals. This is a real-time process driven by the video clock.

The Motion Compensation Module performs all the motion

compensation tasks required to decode MPEG-1, MPEG-2

and MPEG-4 bitstreams. This includes predicting the image

block for the picture being decoded, using pixels from previ-

ously decoded pictures.

The display controller operates in one of four modes:

•

Master mode -- the display controller generates HSYNC and

VSYNC from an internal or external video clock up to 80

MHz

Audio Input and Output Interfaces

The audio decoding block supports the following audio bit-

•

Slave mode -- the display controller receives HSYNC and

VSYNC from an internal or external video clock up to 80

MHz

stream formats:

•

Dolby Digital with conformance to Group A (20-bit)

MPEG-1 Layers 1 and 2

The video display timing can be set for interlaced or non-

interlaced (progressive) video output up to 120 Hz.

MPEG-4 CELP and Low Complexity AAC (decoded using

software on x86 host CPU)

Sub-Pictures

•

16-bit linear PCM data

Sub-pictures are compressed bit maps overlaid on decoded

MPEG video which can be scrolled up and down and faded

in and out. The area, content, color and contrast in every

video field can be changed. These modifications produce

special effects such as highlighting.

®

Compressed Dolby Digital and DTS digital output via

S/PDIF

I2S Digital Audio Output

The I2S serial audio output block receives either the 2-chan-

nel down-mixed decoded Dolby Digital audio, decoded

MPEG-1 audio, decoded MPEG-4 audio or PCM audio data.

It then converts this data into a serial bitstream compatible

with the I2S specification. The 256x F_sserial clock is gener-

ated by an internal digital PLL or an external clock source

may be used.

OSD (On-Screen Display)

The OSD enables simple full screen graphical menus to be

displayed and blended with the MPEG decoded video and

sub-picture. It supports 4 palletized color depths: 4 colors (2

bits per pixel), 16 colors (4 bits per pixel), 128 colors (7 bits

per pixel) and 256 colors (8 bits per pixel). The bit map can

be compressed using Run-Length Coding (RLC) in 2-, 4- and

7-bit per pixel modes. A 256x32 color look-up table (CLUT) is

provided to convert the 2-, 4-, 7- or 8-bit code into a 24-bit

YCbCr color and 16 levels of alpha blending. The Highlight

function is supported in 2-, 4- and 7-bit per pixel modes.

S/PDIF Digital Audio Output

In addition to receiving the same audio data as the I2S digital

audio output block, the S/PDIF output block can receive

compressed DTS and compressed Dolby Digital audio data.

It then converts this data into a serial bitstream compatible

with the S/PDIF specification.

The OSD supports programmable 3-line flicker filtering to

improve the graphics quality on interlaced displays.

Letterbox Display

Analog Stereo Audio Output

Letterbox mode provides vertical downscaling; 16:9 pictures

can be displayed in a letterbox fashion on a traditional 4:3

display.

The EM8475 and EM8476 include two on-chip audio DACs

that receive the same 2-channel information as the I2S digi-

tal output and convert it to analog.

Pan and Scan Display

I2S Digital Audio Input

Pan and scan mode expands the video image to 16:9. A sec-

tion of the image can be displayed at full height on a 4:3 TV

display.

The EM8475 and EM8476 also support an I2S digital audio

input. This audio data may be output onto the I2S or S/PDIF

outputs.

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 4 -

EM8470, EM8471, EM8475, EM8476

Alpha Blending

Component Analog Output

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.

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.

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.

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:

VBI Support

•

RGB and composite video for SCART support

RGB with sync on green

SMPTE GBR

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.

Betacam YUV

M-II YUV

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.

SMPTE YPbPr

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 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.

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.

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.

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.

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 5 -

EM8470, EM8471, EM8475, EM8476

VOD Client Software (ISMA, RTSP)

Local Bus Controller Interface

VOD client software for the x86 is available that supports

RTSP-based ISMA streaming.

The Local Bus Controller (LBC) interface, supported on the

EM8475 and EM8476, is a versatile block, designed to inter-

face the DRAM controller and PCI interface to an external

device, such as a non-PCI MPEG encoder chip. The LBC is

designed to handle DMA transfers (FIFO read/write from the

DRAM) and single register read/write from the external

device to or from the PCI interface. The same DMA transfers

and register read/write operations can be done from the

external device to or from the DRAM controller within the

EM8475 and EM8476.

IP Multicasting Client Software

IP multicasting client software for the x86 is available.

MPEG-4 Client System Software

Third party x86 client software is available that supports the

EM847x, including Envivio and iVAST. For the latest list,

please check with your local sales representative.

The LBC interface is compatible with the 16-bit multiplexed

address / data format (Intel format), 16-bit data and 8-bit

address format (generic format) and 16-bit compressed data

format. It also directly supports the Stream Machine SM2210

/ 2288 MPEG codecs.

Memory Requirements

The EM847x requires a minimum of 4 MB (1Mb x 32) of 100

MHz SDRAM.

PCI Host Interface

The PCI interface is the main conduit between the EM847x

and the host processor. It is designed for both master reads

and writes with programmable burst length and is PCI v2.1

compliant. The PCI interface supports 3.3V and 5V operation

and ACPI power management from the PCI v2.2 specifica-

tion.

Additional Software Available

VOD Client Software (MPEG-2)

VOD client software for the x86 is available that supports

select MPEG-2 video servers, including:

•

Cisco's IPTV family

Concurrent's MediaHawk

InfoValue’s MediaQuick

Kasenna’s MediaBase

nCUBE's NVS

Streaming21's Media Server

Thirdspace’s OVS (Oracle Video Server)

For the latest list, please check with your local sales repre-

sentative.

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 6 -

EM8470, EM8471, EM8475, EM8476

Application Example: Set-top Box with PVR, DVD-Video Playback, DVI Output

The set-top box example below supports PVR, DVD-Video playback, and DVI output capability. System integration requires

very little external logic since the EM847x provides most of the features including:

• Streaming video or video-on-demand (VOD) playback

• Progressive DVD-Video playback

• Interlaced or progressive YPbPr or RGB video outputs

• NTSC / PAL composite and s-video outputs

• Analog and S/PDIF audio outputs

RF TV SIGNAL

SDRAM

4 MB

ANALOG

TV

TUNER

TV AUDIO

DECODER

24-BIT RGB

DVI

TRANSMITTER

COMPOSITE

VIDEO

TO DIGITAL INPUT OF HDTV / DTV MONITOR

ANALOG RGB OR YPBPR

TV VIDEO

DECODER

VIDEO

S-VIDEO

NTSC / PAL COMPOSITE AND S-VIDEO

SPDIF DIGITAL AUDIO OUTPUT

ANALOG STEREO OUTPUT

EM8475

OR

MPEG

ENCODER

EM8476

SDRAM

AND

FLASH

HDD

LOCAL BUS

CD / DVD DRIVE

PCI BUS

HOST CPU

USB, I2C, RS-232

IR

ETHERNET

10/100 T

V.34, V.9X MODEM

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 7 -

EM8470, EM8471, EM8475, EM8476

Application Example: Gateway

The home gateway example below also supports PVR and DVD-Video playback. System integration requires very little external

logic since the EM847x provides most of the features including:

• Streaming video or video-on-demand (VOD) playback

• Progressive DVD-Video playback

• Analog and S/PDIF audio outputs

RF TV SIGNAL

SDRAM

4 MB

ANALOG

TV

TUNER

TV AUDIO

DECODER

SDRAM

2 MB

COMPOSITE

VIDEO

TV VIDEO

DECODER

FOCUS

FS460

VIDEO MIXER

VIDEO

NTSC / PAL COMPOSITE AND S-VIDEO

EM8475

OR

S-VIDEO

EM8476

MPEG

SDRAM

SPDIF DIGITAL AUDIO OUTPUT

ANALOG STEREO OUTPUT

SMARTCARD

4 MB

ENCODER

DVD, MPEG

DECODER

OPTIONAL PVR

SDRAM

PC100

64 MB

INTEL

82810

GMCH

INTEL

CELERON

CPU

LOCAL BUS

PCI BUS

HDD

OPEN

PCI SLOT

TI

INTEL

82801

ICH

CD / DVD DRIVE

TSB43AB22

IEEE 1394

CABLE OR

SATELLITE

TUNER / CA

USB, I2C, RS-232

IR

ETHERNET

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 8 -

EM8470, EM8471, EM8475, EM8476

Hardware vs. Software MPEG Decoding

Use hardware-based MPEG decoding when:

• Delivery of audio and video to a television is the primary function of the system. Standard consumer-oriented connectors

for audio and video must be used, instead of PC-oriented break-out cables and mini jacks. (Example: set-top box.)

• Home theater quality audio and video (such as 6-channel audio analog outputs, component YPbPr or RGB analog video

outputs and a SPDIF digital audio output) are required. Although specifications for audio and video solutions for the PC

market look good on paper, the products themselves rarely meet consumer expectations.

• A relatively slow CPU, such as an embedded processor, is used to lower system costs. Slower CPUs also reduce power

consumption and eliminate noisy fans. Decoding full-screen MPEG-4 requires a 1 GHz CPU, which is currently far too

costly for low-cost set-top boxes to employ.

• Multiple video streams must be decoded simultaneously to support picture-in-picture (PIP).

• Ancillary data processing, such as copy protection, closed captioning (multiple languages), teletext (multiple languages),

v-chip (multiple regions) and widescreen signaling must be performed for each active video stream displayed. Wide-

screen processing must be able to handle anamorphic and letterboxed content for either 4:3 or 16:9 televisions. These

are typically overlooked in software-based solutions.

• Alpha blending is required when overlaying text and graphics (such as closed captioning, teletext, EPG, OSD, etc.) over

video to avoid artifacts (such as flicker) when displayed on a television. Such artifacts are caused by the limited-band-

width video connection between the set-top box and television. It is typically implemented using anti-aliased fonts and

graphics.

• High quality video scaling is required for large television screen sizes. Artifacts not noticeable on a small VGA monitor

are magnified on a large television.

Use software-based MPEG decoding when:

• MPEG decoding is a secondary, rather than a primary function of the system. (Example: PC.)

• MPEG decoding is used in a single-tasking environment. Since MPEG decoding requires substantial CPU resources,

using other applications usually affects playback quality.

• A fast CPU is already available on the platform.

• Only standard stereo audio and video (composite or VGA) outputs are needed.

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 9 -

EM8470, EM8471, EM8475, EM8476

General Specifications

Media Formats

Video Interfaces

•

DVD-Video, Superbit DVD, SVCD (IEC 62107-2000), VCD 1.x,

•

80 MHz 8- / 16-bit CCIR 601 / 656 YCbCr video input port

supports capture resolutions up to 1920x1080i (EM8475 and

EM8476 only)

VCD 2.0, audio CD

•

15 Mbps sustained input data rate

•

80 MHz 8- / 16-bit CCIR 656 / 601 YCbCr video output port

80 MHz 24-bit RGB video output port for DVI with HDCP support

(EM8475 and EM8476 only)

Streaming Formats

•

MPEG-2, ISMA

•

NTSC/PAL composite and s-video analog outputs with optional

Macrovision v7.1 protection (10-bit DACs)

15 Mbps sustained input data rate

Analog RGB / YPbPr (SDTV or HDTV resolution, interlaced or

progressive) with optional Macrovision AGC v1.03 protection in

480p output mode (10-bit DACs, EM8475 and EM8476 only)

Video Decoding Standards

•

MPEG-1, MPEG-2 MP@ML

1

MPEG-4 Advanced Simple Profile Level 5 . Rectangular shape

video decoding up to CCIR 601 resolution (720x480 or 720x576),

support for B pictures, data partitioning support for error resiliency,

up to 4 objects decoded in CIF resolution and compositing with

text and graphics.

Audio Decoding Standards

•

16-bit linear PCM

MPEG-1 Layers 1 and 2

MPEG-4 High Quality Profile Level 2

•

Error concealment

•

CELP and low-complexity AAC

DVD-Video and Superbit DVD

•

Dolby Digital down-mixed to 2 channels

•

CSS decryption

16:9 and 4:3 playback, letterbox, 3:2 pull-down

Multiple angles and sub-picture

DVD-Video navigation software

Audio Interfaces

•

I2S serial digital output for PCM or S/PDIF (IEC 60958) serial

digital output for PCM, compressed Dolby Digital and compressed

DTS

Video Processing

•

I2S serial digital input (EM8475 and EM8476 only)

•

Brightness, color, contrast controls

On-chip stereo audio DACs (100 dB SNR, EM8475 and EM8476

only)

Advanced scaling up to 1920x1080 pixels

Interlaced or non-interlaced output up to 120 Hz

2-, 4-, 7- or 8-bit OSD with optional run-length compression, alpha

blending and flicker filtering

1

Without 1/4 pixel and global motion compensation

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 10 -

EM8470, EM8471, EM8475, EM8476

General Specifications (continued)

Host Interface

Power Management

•

PCI v2.1 with programmable burst length

•

2.5V core with 3.3V I/O (5V tolerant)

Typical power dissipation:

•

Analog video outputs off: 1.2W

Analog video outputs on: 1.4W

Local Bus Interface

•

PCI-to-Local Bus bridge

16-bit multiplexed address / data (Intel mode)

16-bit data and 8-bit address (generic mode)

16-bit data compressed

Package

•

208-pin PQFP for EM8470 and EM8471 (pin compatible with

EM8400)

Supports Stream Machine SM2210 / SM2288 MPEG encoder

•

328-pin BGA for EM8475 and EM8476

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com

- 11 -

EM8470, EM8471, EM8475, EM8476

Product Selection Guide

1

2

1

2

Feature

EM8470

yes

EM8471

yes

EM8475

yes

EM8476

yes

Media Formats

DVD-Video, Superbit DVD, SVCD, VCD 1.x, VCD 2.0, audio CD

Video Decoding

3

MPEG-1, MPEG-2 MP@ML, MPEG-4 Advanced Simple Profile Level 5

yes

Audio Decoding

Dolby Digital, MPEG-1 Layers 1 and 2

MPEG-4 High Quality Profile Level 2

yes

Digital Video Inputs

8- / 16-bit YCbCr (80 MHz)

-

yes

Digital Video Outputs

8- / 16-bit YCbCr (80 MHz)

yes

-

yes

-

yes

24-bit RGB for DVI / HDCP support (80 MHz)

NTSC/PAL Composite and S-video Outputs

Macrovision v7.1 protection

yes

-

yes

-

YPbPr or RGB Analog Video Outputs

-

yes

-

Macrovision AGC v1.03 protection for 480p output mode

Audio Inputs and Outputs

Stereo analog output

S/PDIF / I2S digital output

I2S digital input

-

yes

-

yes

-

yes

Local Bus Interface

Package

-

yes

208 PQFP

2.5v / 3.3v

208 PQFP

2.5v / 3.3v

328 BGA

Power Supply

2.5v / 3.3v

1

2

3

May be sampled or sold only to companies that are both Macrovision and Dolby licensed.

May be sampled or sold only to companies that are Dolby licensed.

Without 1/4 pixel and global motion compensation.

of Sigma Designs, Inc. in the United States and/or other countries. Manufactured under license from Dolby Laboratories and Macrovision. Dolby and the double-D

symbol are trademarks of Dolby Laboratories. All other trademarks or registered trademarks are the property of their respective owners.

Sigma Designs products are sold by description only. Sigma Designs reserves the right to make changes in circuit design and / or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Sigma Designs is believed to be

accurate and reliable. However, no responsibility is assumed by Sigma Designs or its subsidiaries for its use; nor for any infringements of patents or other rights of

third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Sigma Designs or its subsidiaries.

Sales Offices

UNITED STATES

CHINA

EUROPE

HONG KONG

Sigma Designs, Inc.

355 Fairview Way

Sigma Designs China

Room C1, 32F

Sigma Designs, Inc.

49, Rue des Moissonneurs

Brussels, Belgium 1040

+32 496.501234

Sigma Designs (Asia) Ltd.

Unit 1516, Tower 1, Metroplaza

223 Hing Fong Road

Kwai Fong, N.T.

Milpitas, CA 95035

+1 (408) 262-9003

+1 (408) 957-9740 FAX

Electronic Science & Technology Building (Phase 2)

30 Shennan Road Central

Shenzhen, PRC

+32 234.72260 FAX

Hong Kong

Postcode 518031

+852 2401 7388

+86 755 3683878

+852 2610 2177 FAX

+86 755 3683873 FAX

JAPAN

KOREA

TAIWAN

Sigma Designs Japan

4-16-8 Nakahara,

Mitaka-shi,

Sigma Designs Korea

# 801, Dongil Techno Tower B/D

Kuro-dong, Kuro-gu,

Seoul, Korea

Sigma Designs Taiwan

Far East World Center, C Tower

8F-8, No. 79, Sec. 1

Hsin Tai Wu Road

Tokyo 181-0005, Japan

+81 422 79 3067

+82 11 288 0406

Hsichih, Taipei Hsien

Taiwan, R.O.C.

+81 422 79 3067 FAX

+82 2 3281 2034 FAX

+886 2 2698 2066

+886 2 2698 2099 FAX

Revision Date: March 18, 2002

Sigma Designs, Inc.

355 Fairview Way • Milpitas, CA, USA 95035 • Tel: 408.262.9003 • Fax: 408.957.9740

www.sigmadesigns.com • sales@sigmadesigns.com


型号：	EM8471
厂家：	ETC
描述：	MPEG - 4 DECODER FOR SET-TOP DVD AND STREAMING APPLICATIONS MPEG - 4解码器，机顶盒DVD和流媒体应用解码器 DVD
文件：	总12页 (文件大小：153K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EM8471 [ETC]

相关型号：

EM8475

EM8476

EM8500

EM8500-A001-LF24B+

EM85000

EM85001

EM8502

EM8502-A005-LF24B+

EM8609A

EM8631

EM8631J

EM8631S