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| 型號： | VPB261 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 94K |
| 代理商： | VPB261 |
AN146 - 2.1 June 1996
VPB261
H.261 Evaluation Board
Application Note
FEATURES
I
Complete evaluation and prototyping system for
Mitel Semiconductor H.261
Video Compression/Decompression chipset.
I
Fully software configurable IBM PC/XT/AT compatible
expansion card
I
RGB input and output at Rec. 601 resolution
I
Optional gamma correction of input RGB data (VP510)
I
Supports coding/decoding of CIF and QCIF images at
data rates up to 2Mbits/s and frame rates up to 30Hz
I
Three 8 bit video ADCs (VP8708) provide 24 bit colour
accuracy
I
Triple 8 bit video DAC (VP101) for RGB display
I
All RAM requirements fully localised (DRAM & SRAM)
I
Tristateable busses allow incremental CODEC
evaluation
EVALUATION BOARD OVERVIEW
RGB format video is input to the board from a source which
can be gen-locked to the composite sync signal provided by
the VP520 video filter in the decode path (figure 1).
RGB data is sampled at the system clock frequency (27MHz)
using an individual VP8708 for each of the RED, GREEN and
BLUE channels. The data is colour space converted, filtered
and coded to H.261 specification and passed to the
transmission channel. The transmission channel is normally
a simple link to the decoder section of the board, however this
can be intercepted and output to another evaluation board, a
network/ISDN Terminal Adaptor or a different H.261 decoder
if desired. It is also possible to input H.261 data from another
system and decode and display using the VPB261.
There is also the option of alternative video I/O formats via two
headers on the PCB.
Fig.1 Block Diagram of The Evaluation Board
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| VP-B2621911 | 制造商:Vicor Corporation 功能描述:VIPAC Power System 50-900 Watt |
| VPB-3/16-0-SP | 功能描述:熱收縮管和套管 RoHS:否 制造商:3M Electronic Specialty 類型:Tubing 材料:Polyolefin, Flexible 顏色:Clear 最低收縮溫度:+ 100 C 恢復直徑: 長度:100 ft 內(nèi)徑:1.5 in 收縮率:2:1 |
| VPB-3/16-0SPCS5444 | 制造商:TE Connectivity 功能描述:VPB-3/16-0SPCS5444 |
| VPB-3/4-0-SP | 功能描述:熱收縮管和套管 RoHS:否 制造商:3M Electronic Specialty 類型:Tubing 材料:Polyolefin, Flexible 顏色:Clear 最低收縮溫度:+ 100 C 恢復直徑: 長度:100 ft 內(nèi)徑:1.5 in 收縮率:2:1 |
| VPB-3/4-0SPCS5444 | 功能描述:熱收縮管和套管 HS-TUBING .75" BK PRICE PER FT RoHS:否 制造商:3M Electronic Specialty 類型:Tubing 材料:Polyolefin, Flexible 顏色:Clear 最低收縮溫度:+ 100 C 恢復直徑: 長度:100 ft 內(nèi)徑:1.5 in 收縮率:2:1 |
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