Barco-Silex
Rue du Bosquet 7
B-1348 Louvain-La-Neuve
www.barcodesignservices.com
Version: 1.0
MPEG-4 Simple Profile Encoder
BA131MPEG4E Factsheet
Features
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Compliant with ISO/IEC 14496-2: Information technology – Coding of audio-visual objects –
Part 2: Visual
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Support for Simple Profile with resolution user definable up to 4CIF (incl. levels L1 to L5)
•
Real-time 4CIF encoding at 30 frames per second
•
Support for I-VOP and P-VOP, with configurable interval between successive I-VOPs
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Advanced motion estimation (directional search), with automatic Intra macroblock detection
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+15/-16 motion search window
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Half-pixel motion precision
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Single motion vector per macroblock
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Power savings mechanisms
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AC/DC coefficient prediction
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Constant Bit Rate option available through Microblaze or Nios code with advanced bit rate
regulation algorithm, using statistical information available from the motion estimation engine
•
Easy synchronous pixel and stream interfaces
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Easy control and status interface through simple CPU interface
•
Off-chip reference frame store, with easy memory interface pluggable to any custom memory
controller (SRAM or SDRAM for instance)
•
Minimized off-chip data bandwidth
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Full header processing
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Optional support for multiple simultaneous streams encoding
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Optimized for Stratix, StratixII, CycloneII, Virtex2, Virtex2PRO, Spartan3, Spartan3E and
Virtex4 FPGA’s
Texture
Coding
Texture
Update
Huffman
Encoding
Frame Buffer
YCbCr
macroblock
MPEG-4
stream
CPU Interface
Motion
Compen-
sation
Rate
Allocator
Motion
Estimation
(bypassed for
I-VOP’s)
Bitstream
Packetization
Memory cache
Input
controller
Memory Interface
Figure 1: Block diagram
