BCM7041 Broadcom Corporation, BCM7041 Datasheet
BCM7041
Manufacturer Part Number
BCM7041
Description
SIMULTANEOUS DUAL-CHANNEL DIGITAL VIDEO/AUDIO ENCODER
Manufacturer
Broadcom Corporation
Datasheet
1.BCM7041.pdf
(2 pages)
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SIMULTANEOUS DUAL-CHANNEL DIGITAL VIDEO/AUDIO ENCODER
Simultaneous dual-channel, single-chip, NTSC/PAL MPEG-2
encoding system
Dual channel MP@ML MPEG-2 video encoder
• Variable resolutions:
• Variable frame rate, up to 30(NTSC)/25(PAL) fps
• Supports constant/variable bit rates: 1 – 24 Mbps
• Variable GOP length and structure: I, IP, IPB, IPBB
• +/-100 pixels wide motion estimation search range
• Automatic 3/2 pulldown detection
• Video input; selectable 8/10 bits CCIR656
• 4:2:2 to 4:2:0 conversion
Dual-channel, high-fidelity 24/56 bits programmable audio
DSP
• MPEG-1 layer II stereo encoding
• Dolby Digital (AC-3) stereo encoding
• Programmable frequencies and bit rates (64 – 384 Kbps)
Highly programmable system multiplexing processor
• Ability to multiplex up to four inputs to one or two multiplexed
• CBR/VBR Program/Transport stream multiplexing
• User data / VBI insertion
• Programmable stream parameters
Dual-channel video pre-processing
• 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
PCI 32 bit/33 MHz, PCI DMA master or PCI slave and 16 bit
Generic Host interface
Integrated I
Package: 256-pin BGA
Supply voltage: 1.8/3.3V (5V compatible)
Power consumption: less than 1.5 W
System memory: SDRAM, 1 or 2 modules of 2Mx32
Horizontal: 720, 704, 640, 544, 480, 360, 320, 160
Vertical: 480, 240, 112 (NTSC); 576, 288, 144 PAL
streams
2
C controller
2
S/AC-97 stereo audio inputs
F E A T U R E S
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BCM7041
System Block
Fully integrated dual-channel MPEG-2 digital audio/video
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.
Time shift/personal video recording (PVR):
• Set-top box
• Stand-alone PVR
• Television set
DVD recorder
Digital VCR (VCR replacement)
PC TV tuner
Digital camcorder
Video transmission:
• Video over IP
• Video conferencing
• Security and surveillance
Diagram
V ideo x 2
A udio x 2
S U M M A R Y O F B E N E F I T S
A P P L I C A T I O N S
2M x 32
BCM7041
2M x 32
PCI/Generic Interface
Compressed
Data (DVB)
Output
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BCM7041 Summary of contents
Page 1
... Simple system design: BCM7041 + modules SDRAM Time shift/personal video recording (PVR): • Set-top box • ...
Page 2
... Core Proc S/AC-97 digital audio is delivered to the BCM7041 audio DSPs at a frequency of 32/44.1/48 KHz. The high-quality, 24/56-bit, fixed-point DSP encodes the audio either in MPEG-1 layer Dolby AC-3 format. The MPEG implementation supports bit rates of 64 kbps - 384 kbps. The AC-3 implementation conforms to the Dolby consumer class ...