BCM7041
®
SIMULTANEOUS DUAL-CHANNEL DIGITAL VIDEO/AUDIO ENCODER
FEATURES
SUMMARY OF BENEFITS
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Simultaneous dual-channel, single-chip, NTSC/PAL MPEG-2
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encoding system
Dual channel MP@ML MPEG-2 video encoder
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Variable resolutions:
Horizontal: 720, 704, 640, 544, 480, 360, 320, 160
Vertical: 480, 240, 112 (NTSC); 576, 288, 144 PAL
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Variable frame rate, up to 30(NTSC)/25(PAL) fps
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Supports constant/variable bit rates: 1 – 24 Mbps
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Variable GOP length and structure: I, IP, IPB, IPBB
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+/-100 pixels wide motion estimation search range
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Automatic 3/2 pulldown detection
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Video input; selectable 8/10 bits CCIR656
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4:2:2 to 4:2:0 conversion
Dual-channel, high-fidelity 24/56 bits programmable audio
DSP
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MPEG-1 layer II stereo encoding
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Dolby Digital (AC-3) stereo encoding
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Programmable frequencies and bit rates (64 – 384 Kbps)
Highly programmable system multiplexing processor
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Ability to multiplex up to four inputs to one or two multiplexed
streams
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CBR/VBR Program/Transport stream multiplexing
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User data / VBI insertion
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Programmable stream parameters
Dual-channel video pre-processing
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7-tap vertical/horizontal luminance/chrominance filter
Accurate 27 MHz video/audio/PCR timestamps for exact video/
audio synchronization during playback
Dual-channel dedicated serial/parallel DVB transport stream
interface
Dual-channel I
2
S/AC-97 stereo audio inputs
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Fully integrated dual-channel MPEG-2 digital audio/video
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encoder and audio/video multiplexer in a single chip
drastically reduces overall system and development costs.
Dual encoder enables simultaneous time shifting of one
channel and recording of another channel.
Video/audio elementary, video/audio packetized elementary,
program, and transport streams generated internally to the
BCM7041.
Broadcom fourth generation production/field-proven and in-
production technology.
Universal compatibility through standards compliance: Meets
key video encoding (ISO/IEC 13818-2), audio encoding (ISO/
IEC 11172-3, MPEG-1, Layer II and Dolby digital AC-3) and
system multiplexing (ISO/IEC 13818-1).
Broadcom-developed reference design kit includes application
board, sample application, and drivers based upon industry-
standard operating systems, enabling rapid and streamlined
software and hardware development, reducing time to market.
Simple system design: BCM7041 + 1 or 2 modules SDRAM.
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APPLICATIONS
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Time shift/personal video recording (PVR):
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Set-top box
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Stand-alone PVR
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Television set
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DVD recorder
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Digital VCR (VCR replacement)
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PCI 32 bit/33 MHz, PCI DMA master or PCI slave and 16 bit
Generic Host interface
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Integrated I
2
C controller
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Package: 256-pin BGA
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PC TV tuner
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Digital camcorder
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Video transmission:
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Video over IP
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Video conferencing
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Security and surveillance
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Supply voltage: 1.8/3.3V (5V compatible)
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Power consumption: less than 1.5 W
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System memory: SDRAM, 1 or 2 modules of 2Mx32
System Block
Diagram
Video
x
2
2M
x
32
2M
x
32
BCM7041
Audio
x
2
Compressed
Data (DVB)
Output
PCI/Generic Interface
BOARDCOM [ Broadcom Corporation. ]
