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參數(shù)資料
| 型號： | EM8471 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | MPEG - 4 DECODER FOR SET-TOP DVD AND STREAMING APPLICATIONS |
| 中文描述： | 的MPEG - 4的SET解碼器熱門DVD和流媒體應(yīng)用 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 150K |
| 代理商： | EM8471 |
EM8470, EM8471, EM8475, EM8476
- 2 -
Sigma Designs, Inc.
355 Fairview Way Milpitas, CA, USA 95035 Tel: 408.262.9003 Fax: 408.957.9740
www.sigmadesigns.com sales@sigmadesigns.com
Bitstream Demultiplexing
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.
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.
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.
MPEG Video Decoding
The MPEG video decoder engine contains the following modules used for
MPEG-1, MPEG-2 and MPEG-4 video decoding:
MPEG-1 & 2 Huffman Decoder
MPEG-4 Huffman Decoder
Motion Compensation
IDCT
Inverse Quantizer
AC / DC Predictor
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.
Common Features
Programmable display output with improved
scaling up to 1920x1080 resolution, interlaced
or progressive, up to 120 Hz refresh
2-, 4-, 7- or 8-bit OSD with optional run-length
compression, alpha blending and flicker
filtering
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
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
EM8475 / EM8476 Features
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
Interlaced or progressive analog RGB or
YPbPr video outputs with optional Macrovision
AGC v1.03 protection and VBI data support
(10-bit DACs)
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EM8476 | MPEG - 4 DECODER FOR SET-TOP DVD AND STREAMING APPLICATIONS |
| EM85000 | APPLE DESKTOP BUS MOUSE CONTROLLER |
| EM91203 | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE |
| EM91203A | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE |
| EM91203AP | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM8475 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MPEG - 4 DECODER FOR SET-TOP DVD AND STREAMING APPLICATIONS |
| EM8476 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MPEG - 4 DECODER FOR SET-TOP DVD AND STREAMING APPLICATIONS |
| EM85000 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:APPLE DESKTOP BUS MOUSE CONTROLLER |
| EM85001 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Apple desktop bus mouse controller |
| EM-868U | 制造商:SPC Multicomp 功能描述:MICROPHONE -78DB UNIDIRECTIONAL 18KHZ 制造商:SPC Multicomp 功能描述:MICROPHONE, -78DB, UNIDIRECTIONAL, 18KHZ; Directivity:Unidirectional; Output Impedance:250ohm; Frequency Response Min:50Hz; Frequency Response Max:18kHz; Sensitivity:-78dB 3dB at 1kHz; Frequency:18kHz; Sound Level SPL:135dB ;RoHS Compliant: Yes |
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