Barco BA131 Supplementary Manual
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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
• Compliant with ISO/IEC 14496-2: Information technology – Coding of audio-visual objects –
Part 2: Visual
• 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
• Advanced motion estimation (directional search), with automatic Intra macroblock detection
• +15/-16 motion search window
• Half-pixel motion precision
• Single motion vector per macroblock
• Power savings mechanisms
• AC/DC coefficient prediction
• 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
• 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
• Full header processing
• Optional support for multiple simultaneous streams encoding
• Optimized for Stratix, StratixII, CycloneII, Virtex2, Virtex2PRO, Spartan3, Spartan3E and
Virtex4 FPGA’s
Texture
Coding
Texture
Update
Huffman
Encoding
Frame Buffer
YCbCr
macrobloc
k
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