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| PRODUCT (R) BCM7020R Brief OF BENEFITS HIGH DEFINITION VIDEO UMA SUBSYSTEM WITH 2D GRAPHICS BCM7020 FEATURES SUMMARY * ATSC-compliant, All-Format MP@HL MPEG-2 video dual decoder with personal video recording feature * 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 solution * Provides a cost-effective video andfor high definition and standard definition graphics systems * 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 (AC-3)/MPEG * Dolby Digital SPDIF output multichannel audio decoder with * Stereo audio DACs * Advanced 2D/3D-effects graphics engine * Studio-quality text and graphics at HD resolution * Supports multiple layers and windows * Includes simultaneous high definition and standard definition analog output for watch and record 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 3D effects create studio-quality screen transitions and adds a whole new dimension to electronic program guides 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 * NTSC/PAL analog video decoder * NTSC/PAL/HD video encoder * Bus bridge to memory, local bus, and PCI * POD support including DVS 213 DES descrambler * DVT and DC2-compliant transport demultiplexer with DVB, DES, and Multi2 descramblers * Support for 64 PIDs and 64 section filters BCM7020 Advanced Video, Graphics, and Audio Subsystem with Bus Bridge Dual Smart Card MIPS CPU 2-KB Instruction/ Data Cache Video Audio Demod Analog NTSC/PAL Video MPEG x2 ROM/ Flash I/O BCM4413 HPNA/V.90 10/100 BASE-TX SDRAM USB Duplex Filter/ Splitter Video 1 Data Silicon Tuner Video 2 OOB Upstream Data BCM3250 Dual QAMLink QPSK OOB QPSK transmitter DOCSIS 1.1 DAVIC 1.2 VoIP DSP BCM7020 Dual Video Out Analog Audio SPDIF Audio I2S Interfaces IDE Controller PCI Bus 1394 Interface BCM3125 Transceiver IR Interface PCMCIA POD I/F BCM7020 OVERVIEW PCI ROM and I/O SDRAM Analog Video In Composite Video A/D Decoder and TBC Bus Bridge SDRAM Controller DMA Engine Video Scaler Graphics and Video Display Engine HD Display and Format Conversion Dual Composite Video Encoder and HD DACs HD/SD Analog Video SD Analog Video HD/Dual SD MPEG-2 Video Decoder Transport 1 Transport 2 Transport 3 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 Dolby and MPEG Audio Decoder PCM Audio PCM Audio In Dual I2S Stereo Audio DACs L R SPDIF Dual ISO7816 I/F CPU Bus The BCM7020 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 BCM7020 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 BCM7020 simultaneously supports up to 2 record and 2 playback streams , with optional 3DES encryption/decryption. The BCM7020 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. Broadcom(R), the pulse logo, and Connecting everything(R) 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. (R) BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 (c) 2002 by BROADCOM CORPORATION. All rights reserved. 7020-PB08-403-R 11.19.02 Phone: 949-450-8700 FAX: 949-450-8710 Email: info@broadcom.com Web: www.broadcom.com |
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