PRODUCT - Digchip
BCM7031R
PRODUCT
Brief
®
HIGH DEFINITION VIDEO PCI SUBSYSTEM WITH 2D/3D GRAPHICS
B C M 7 0 3 1
F E AT U R E S
S U M M A R Y
All-Format MP@HL MPEG-2 video
• ATSC-compliant,
dual decoder with personal video recording feature
B E N E F I T S
a cost-effective solution for high definition
• Provides
and standard definition video and graphics systems
• Dual channel decode with simultaneous standard definition
(SD) display of each channel content
• Single channel high definition (HD) decode with simultaneous
display of both HD and scaled SD content
• Simultaneous dual record, dual playback personal video
recording (PVR) with encryption
• Six on-chip video DACs
• DVD playback
•
common to cable and satellite applications
PVR capability enables personal viewing and
scheduling, video-on-demand (VOD), and VCR
"trick mode" effects on any video stream
• Encryption ensures copy protection of recorded programming
content
simultaneous high definition and standard
• Includes
definition analog output for watch and record
Digital (AC-3)/MPEG multichannel audio
• Dolby
decoder with SPDIF output
•
• Dual I2S bidirectional audio ports
audio DACs
• Stereo
Fully featured 3D graphics HW accelerator
• Advanced
2D/3D-effects graphics engine
• • Studio-quality
text and graphics at HD resolution
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• Supports multiple layers and windows
NTSC/PAL analog video decoder
NTSC/PAL/HD video encoder
PCI 2.1 compliant
POD support including DVS 213 DES descrambler
DVT and DC2-compliant transport demultiplexer with
DVB, DES, and Multi2 descramblers
Simultaneous CCIR656 inputs and outputs
Support for 64 PIDs and 64 section filters
capability
Advanced 2D graphics system allows applications
such as internet browsers and electronic program
guides to deliver studio-quality text and graphics on
television monitors
Full featured 3D graphics engine allows for multiplayer gaming and 3D internet website acceleration
PCI interface allows for direct connection of costeffective SuperI/O devices
High-performance DMA capability can be used for
cable modem traffic
Broadcom-developed device drivers enable rapid
software development cycle
Supports DVS POD requirements
PCI interface provides bi-endian support and up to
3 bus masters for maximum system design flexibility
BCM7031 Advanced Video, Graphics, and Audio Subsystem
Dual Smartcard
BCM7501
DVI
MIPS CPU
Bridge Chip
SDRAM
Video
Audio
Demod
BCM4413
HPNA/V.90
10/100 BASE-TX
Analog
NTSC/PAL
SDRAM
Video
USB
BCM7031
Silicon Tuner
Duplex
Filter/
Splitter
Video 1
OOB
Upstream Data
Data
Silicon Tuner
Video 2
Silicon Tuner
BCM3250
Dual QAMLink¨
QPSK OOB
QPSK transmitter
DOCSIS 1.1
DAVIC 1.2
VoIP DSP
MPEG
x2
BCM3125
Transceiver
PCMCIA POD I/F
Fully Featured
3D Graphics Engine
Dual Video
Out
Analog Audio
SPDIF Audio
I2S Interfaces
IDE
Controller
1394 Interface
PCI Bus
IR
Interface
B C M 7 0 3 1
Analog
Video
In
Composite Video
A/D
Decoder and TBC
O V E R V I E W
PCI
64-bit SDRAM
PCI
Interface
SDRAM
Controller
DMA Engine
Graphics and
Video
Display Engine
HD Display and
Format Conversion
Dual
Composite
Video
Encoder
and
HD DACs
HD/SD analog video
SD analog video
Video Scaler
HD/Dual SD
MPEG-2 Video
Decoder
In band 0
In band 1
In band 2
MPEG-2 Transport
Processor with DVB
Descrambler
Dual
PVR
Engine
Paxel
2D/3D
Graphics
Processor
3D
Graphics
Engine
Dolby and
MPEG
Audio
Decoder
PCM
Audio
Stereo
Audio
DACs
SPDIF
PCM
Audio In
Dual I2S
L
R
SPDIF
Audio Out
Dual ISO 7861 Interface
The BCM7031 Advanced High Definition, Video/Graphics Subsystem
supports the requirements of television and set-top box systems that
require high definition or standard definition decoding of MPEG-2
streams with simultaneous high definition and standard definition
outputs. For systems that require only standard definition output, a
reduced-memory mode substantially reduces the amount of memory
needed for the video decompression process. The video decoder also
supports multiple stream standard definition decoding, providing both
tiled video and PIP capability.
The BCM7031 graphics are based on Broadcom’s advanced
video/graphics technology that allows studio-quality text and graphics
to be displayed on television-based systems. The graphics compositing
engine allows for many windows of graphics and video to be layered
with blending and anti-aliasing, creating rich, high-quality, display
capability.
An onboard vector RISC processor provides 2D graphics, anti-aliased
text, and 3D effects.
A MPEG-2 DVB/DC2-compliant transport demux with 3 transport
stream inputs has advanced section filtering capability, DVB
descrambler, DES descrambler with ECB/CCB capability, and 2
ISO7816 smart card interfaces. The DES descrambler complies with the
DVS 213 requirements for the transport stream POD interface.
The transport engine is designed to support personal video recording
(PVR) functions, allowing the set-top box to support VCR-like
functions, such as fast forward/reverse, pause, and record. The
BCM7031 supports up to 2 record and 2 playback streams
simultaneously, with optional 3DES encryption/decryption.
The BCM7031 decodes both Dolby Digital (AC-3) and MPEG
multichannel compressed streams. Audio output is provided over stereo
DACs or SPDIF.
A PCM audio engine mixes separate audio streams generated from the
MPEG2/Dolby audio decompression circuitry, PCM audio generated
from the CPU, or PCM audio input via a baseband audio input. These
streams can be resampled and mixed together with volume control.
The BCM7031 is an ideal solution where maximum system design
flexibility and performance is key. Its bi-endian architecture and full DMA
capability work with any CPU and PCI system configuration.
DVD playback is realizable. The on-chip MPEG video decoder has the
ability to parse the PES streams extracted from the program streams found
on DVDs. AC-3 audio can be decoded to either stereo or Dolby ProLogic
and output to either the on-chip DAC and/or as PCM to the SPDIF interface.
The audio engine can also output native AC-3 or DTS bit streams directly
to the SPDIF. Sub-picture decoding and rendering are handled by the host
CPU and the on-chip graphics processor. With the assistance of software
running on an external CPU, a complete DVD playback system can be
realized.
Broadcom®, the pulse logo, and Connecting everything® are trademarks of
Broadcom Corporation and/or its subsidiaries in the United States and certain other countries.
All other trademarks are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
7031-PB06-R-403-11.19.02
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
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