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博通BCM7410多格式HD STB系统方案

作者:  时间:2009-01-19 10:06  来源:eaw
博通(Broadcom)公司的BCM7410是多格式低成本HD STB系统级芯片,集成了用于家庭网络的MoCA调制解调器, 1080p60质量的视频, 500-DMIPS CPU,双信道高清视频译码器(H.264,VC-1, MPEG- 2, MPEG-4 Part 2, H.263和DivX),支持镶嵌视频,多功能音频译码器,PC级2D和3D图像处理,高质量视频缩放和逐行运动补偿,六个视频DAC,立体声高保真音频DAC,以及提供STB控制功能的整套外设. BCM7410还支持DDR2或DDR3存储器架构,以及包括可编程的安全处理器和传输引擎.本文介绍了BCM7410的系统整体特性和视频/音频/图像特性,以及方框图.

BCM7410: HD Multiformat STB SoC with Integrated MoCA™ Low-Cost Gateway or Client STB Decoder
The BCM7410 redefines low-cost STB integration: a MoCA modem for home networking, 1080p60 quality video, a 1500-DMIPS (Millions of Instructions per Second) CPU, a dual-channel high-definition video decoder (H.264,VC-1, MPEG- 2, MPEG-4 Part 2, H.263,and DivX), mosaic video support, a multifunction audio decoder, PC class 2D and 3D graphics processing, highquality video scaling and motion compensated deinterlacing, six video DACs, stereo high-fidelity audio DACs, and a suite of peripherals providing a variety of set-top box control functions—all under the oversight of a dynamic power
controller for energy efficiency. The BCM7410 supports either DDR2 or DDR3 memory architectures future-proofing the system design. The BCM7410 also contains a programmable security processor and transport engine making the solution perfect either as a low-cost gateway device or as a client device for cable, satellite, IP, digital TV and retail business models.
While the BCM7410 can be paired with a BCM3255, forming a low-cost media center solution, it shines best as a stand-alone MoCA-connected IP client box, eliminating the need for multiple conditional access points, hard drives, and demodulation front ends.

The integrated 1.0/1.1+ MoCA Modem, PHY and on-chip RF transceiver incorporates a dedicated 200-DMIPS CPU supporting up to 240 Mbps transfers, 256 QAM for bit loading and an extended frequency range. All flow control and processing is offloaded from the host processor. Support is included for Low-RF mode features such as power mode, required carrier frequencies, preamble requirements, adjacent FSK channel for SB control, and more. The modem is driven by a dedicated on-chip Gbit Ethernet MAC for efficient data transfers and address learning, thereby achieving maximum actual system throughput. When used in conjunction with other Broadcomenabled devices, additional performance can be realized. The controller is field-programmable, allowing the service provider to tune performance for unique circumstances. When paired with a BCM3450 power amplifier/lownoise filter, it forms a direct connection to a MoCA network.

The BCM7410 incorporates a 1500-DMIPS dual-threaded MIPS32™ microprocessor subsystem, including a floating point unit, memory mapping unit and deep data caches, thereby enabling a plethora of consumer applications such as Flash, Internet video decode formats, JPEGs, and much more.
The BCM7410 performs upscaling and conversion to 1080p60 of any source input (likewise for 50-Hz-based content to 1080p50). An on-chip filter reduces the effect of digitally captured analog capture noise. The same filter helps eliminate motion-induced encoded artifacts. A key feature is mosaic video support, where multiple live streams can be decoded and arrayed for unique channel guide applications Also included are motion-adaptive deinterlacing with 3:2 pull-down and letterbox detection. Digital noise reduction filters minimize mosquito noise, AVC/VC-1 low-encoded bit-rate noise, and MPEG artifacts, including block noise. Picture-in-picture, split picture, and independent picture in graphics are supported.
H.264 (AVC) support includes Main and High Profile to Level 4.1 for 720p and 1080i high definition for HD and to Level 3.1 for SD streams. AVC High Profile was added to the fidelity range extensions specifically to address the needs of consumer broadcast and playback applications. The video decoder also supports high-definition VC-1 (Advanced Profile Level 3, Main, and Simple Profiles) and MPEG-2, Main Profile at Main and High Levels. The BCM7410 has an advanced audio processor capable of decoding Dolby
Digital, Dolby Digital Plus, AAC 5.1, AAC+ level 2, and MPEG 1 layers 1, 2, and 3 with simultaneous pass-through support. This can be combined with transcoding and volume leveling. 3D SRS audio is also supported. Available audio outputs are I2S, S/PDIF, and stereo analog outputs.

High-quality video and graphics processing is integrated, featuring advanced studio-quality 2D and OpenGL® ES 3D graphics processing. The 3D engine allows for the seamless use and blending of live video for stunning user interface effects.
The BCM7410 dual-stream analog video encoder supports either Macrovision® or Dwight Cavendish encoding options. Output formats include a complete suite of NTSC and PAL formats for worldwide application. The six configurable DACS support composite, S-Video, SCART, RGB, and YPrPb component. The following output resolutions are supported: 480i, 480p, 576i, 576p, 720p, 1080i, and 1080p 24/30/50/60. The BCM7410 includes a HDMI interface and a channel 3/4 RF modulator. Both a direct HD digital output port
and an ITU-R-656 output port are also available, as well as a teletext sideband
interface.

Integrated peripherals include a 1394 MAC and PHY, UARTS, ISO7816 smart card interfaces, counter/timers, a GPIO, a LED/keypad controller, an IR receiver, and an IR blaster. Advanced connectivity features include a PCI bus, two USB 2.0/1.1 ports, two SATA II ports, and a second Gigabit MAC, which can be configured to interface to on-chip 10/100 PHY, or to external Gigabit PHY via RGMII.

The transport processor is MPEG-2- and DVB-compliant, supporting external transport inputs and internal playback channels. Dedicated engines offload record, audio, video, and PCR processing, as well as message filtering, including DVR trick mode support. Encryption support includes 1DES/3DES/ DVB/Multi2/AES.

The programmable security processor provides key generation, management, and protection. With on-chip OTP, specific customer security environments can be realized. The processor constantly monitors for threats and hacking attempts.

BCM7410系统整体特性
System communication
Complete Integrated MoCA™ 1.0/1.1+ 240 Mbps interface
200 DMIPS CPU/MAC/PHY/ 1.8 GHz Tuner
Ethernet to MoCA Bridging
Low RF support included
Integrated 1394a MAC/PHY interface
10/100/1Gigabit Ethernet MAC, RGMII or 10/100 Ethernet PHY
Processing
1500+ DMIPS Dual-threaded Host processor wth FPU/ MMU
Programmable Power Management Controller for EnergyStar®
DDR2/DDR3 32-bit Memory Controller
Second DDR2/DDR3-1066 16-bit Memory Controller
DDR2/DDR3 (667, 800, 1066)
Security, Conditional Access, DRM
Broadcom security processor
Tru2way™-ready with on-chip MCARD support
Dual SmartCard support
Device connectivity and control
Dual SATA II for DVR
Dual USB 2.0 host controller
HDMI 1.3a/DVI 1.0 MAC and PHY with HDCP 1.3
3.3V PCI 2.3
IR remote control receiver with IR blaster
Video connectivity and support
HDMI/HDCP and Component HD/SD Outputs and
Simultaneous Composite and S-Video SD Outputs
VBI encoders for CC/TTX with NABTS/CGMSA/WSS/ Gemstar® standards and dedicated TTX sideband
RF modulator with BTSC encoder
ITU-R-656 output port
Macrovision® 7.1 or Dwight Cavendish support options
SCART 1 and 2 support
视频/音频/图像特性
Advanced AVC/MPEG-2/VC-1 decoder
H.264/AVC Main and High Profile to Level 4.1
VC-1 Advanced Profile @ Level 3
VC-1 Simple and Main Profile
HD MPEG-2 and SD MPEG-2
MPEG still-picture decode
DivX® and MPEG-4 part 2 ASP decode
H.263
AVS option available
1080i60 Deinterlacer for Full HD 1080p50/60 Video Output
Supported on both HDMI and Component Outputs
Advanced audio processor
AAC LC, AAC LC+SBR Level 2, AAC+ Level 2
Dolby® Digital, Dolby Digital Plus
MPEG I layers 1, 2, and 3 (MP3)
Windows Media® audio
Audio transcode and audio leveling
Pair of on-chip stereo high-fidelity audio DACs
3D SRS audio support
I2S bidirectional ports
S/PDIF output
2D and 3D graphics drawing engines
Studio-quality text and graphics at HD resolution
Supports multiple layers and windows
Complete 3D graphics engine with OpenGL® ES 1.0 support
Digital Noise Reduction (DNR)
Reduces MPEG artifacts, including block noise reduction
Reduces mosquito noise
Reduces low bit-rate noise
Reduces Chroma noise
Motion Compensated Temporal Filtering
Reduces encoded artifacts in digital streams
Reduces motion induced artifacts
Reverse 3:2/2:2 pull-down
Letterbox detection



图1.BCM7410方框图

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