bcm7031 Broadcom Corp., bcm7031 Datasheet - Page 2

• Manufacturer Part Number: bcm7031
• Description: Bcm7031 - High-definition Video Pci Subsystem With 2d/3d Graphics
• Manufacturer: Broadcom Corp.

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 antialiasing, creating rich, high-quality, display capability.
An onboard vector RISC processor provides 2D graphics, antialiased
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.
Broadcom
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
7031-PB07-R
®
, the pulse logo, and Connecting everything
In band 0
In band 1
In band 2
06/30/04
Analog
Video
In
Dual ISO 7861 Interface
Processor with DVB
MPEG-2 Transport
MPEG-2 Video
Composite Video
Decoder and TBC
Video Scaler
HD/Dual SD
Descrambler
Decoder
®
A/D
®
are trademarks of Broadcom Corporation and/
Engine
Dual
PVR
Interface
PCI
PCI
DMA Engine
Processor
Graphics
2D/3D
Paxel
O V E R V I E W
64-bit SDRAM
Controller
SDRAM
Graphics
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
BCM703 1 supp orts up to 2 reco rd a nd 2 p la ybac k stream s
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 either to 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. Subpicture 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 created.
Engine
Format Conversion
3D
HD Display and
Display Engine
Graphics and
Video
Dolby and
Decoder
MPEG
Audio
Composite
HD DACs
Encoder
Video
Dual
and
Audio
SPDIF
PCM
Stereo
Audio
DACs
PCM
Audio In
L
R
SPDIF
Audio Out
Dual I
HD/SD analog video
SD analog video
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
2
S