BCM7035 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – HD VIDEO / GRAPHICS UMA SUBSYSTEM AND MIXER WITH DVI

BCM7035 OVERVIEW
ROM and
PCI
I/O
SDRAM
HD Digital In
Analog
Video
In
Transport 1
Transport 2
Transport 3
Composite Video
A/D
Decoder and TBC
Video Scaler
Bus
Bridge
SDRAM
Controller
DMA Engine
Graphics and
Video
Display Engine
HD Display and
Format Conversion
Dual
Video
Encoder
and
HD DACs
HD/Dual SD
MPEG-2 Video
Decoder
MPEG-2 Transport
Processor
with DVB and DES
Descramblers
Dual
PVR
Engine
CPU
Interface
and
Access
Caches
(2-KB instruction/
Data Cache)
Paxel
Video/
Graphics
Processor
3D
Graphics
Engine
Dolby and
MPEG
Audio
Decoder
PCM
Audio
Stereo
Audio
DACs
Dual ISO7816 I/F
CPU Bus
HD/SD Analog
Video
DVI Out
SD Analog
Video
PCM
Audio In
Dual I²S
L
R
SPDIF
The BCM7035 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 decompressions process. The video decoder also
supports multiple stream standard definition decoding, providing both
tiled video and PIP capability.
The BCM7035 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 recorder
(PVR) functions, allowing the set-top box to support VCR-like
functions, such as fast forward/reverse, pause, and record. The
BCM7035 supports up to 2 record and 2
playback streams simultaneously, with optional 3DES
encryption/decryption.
The BCM7035 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.
A bus bridge is incorporated to provide a complete solution bridging the
processor to memory, local I/O, and PCI. Main memory is shared among
video, graphics, and the CPUs, which increases system performance and
reduces cost. A flexible and powerful DMA controller offloads the CPU by
transfering data between the different busses and memory, facilitating the
needs of systems incorporating a cable modem.
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.
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
7035-PB03-403-R 11.19.02
Phone: [phone]
FAX: [phone]
Email: [e-mail]
Web: www.broadcom.com