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发表于 2007-2-10 01:31:38
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re:5G 无线数字音视频传输模块介绍:...
5G 无线数字音视频传输模块介绍: 3 F8 r! y4 I; S) P! F4 E9 f
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1. Key Features
6 Q5 O. P5 d7 ~8 U2 m k1) Complete transceiver design of wireless communication at 5 GHz. / {+ v& m9 b, E# r0 Y+ J
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with , p, N/ V$ N) n' W( \
different country spectrum requirements. : L9 `( b3 P1 \+ }3 c
3) Dynamic frequency selection to resist interferences.
7 w. R4 {: x% U- A6 ~4) Close-loop power control to minimize power consumption and be a friendly neighbor to " h) v4 @9 n" X9 V/ g% o, t
other WLAN networks at 5 GHz. 5 m/ |8 ^: q X' U" n% f: x8 f
5) Secure networking to assure privacy and content rights protection. # ~! R, M! C U* E
6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
. g9 P- j: ~2 t9 \. rH.264 and VC-1 (WM-9).
5 b9 C4 ?/ e3 j6 V0 A, d7) Supports point-to-point video connection with full QoS and point-to-multipoint video
5 K4 w1 K) n' o7 C) Rbroadcasting.
# \3 o' F9 u; g' w9 e7 ], F: ]8) Configurable expansion I/O connector enabling easy integration with existing host
- B7 {% O8 N& u- y2 zsystems.
3 K( b; B) `. ~; T w2 k0 A7 ?5 L9) HCI interface to the host CPU to enable flexible application development at the host level. `' R8 m" p* C
10) Transmission of IR control signals to the video source devices from the TV location.
: b8 Z- c/ P5 F/ J6 w* ~& ~8 j2. System Diagram " Y3 M- ]! D+ G0 L
WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
" O- F( p$ J t2 m$ Otransport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
3 e) y% U* p9 mthat can be integrated as video sender and video receiver according to the host platform. When
' \1 e0 V5 O. Q7 n+ H X9 q" Hused as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
' }+ X* y) R' {, L% ^STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display 8 y0 ~: u4 H0 k* o
device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
! M9 h8 A4 ]# ?) c. aglueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
; c6 n8 y( L9 b! ^- e; `. J* cQoS. ' {% f& d/ j0 o$ q- f- H
The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
: O0 m, u/ V5 Q$ O! s3 N: frouted and configured through the CEC enabling easy integration with existing host systems.
* |* I* N/ f; p; f! ?6 x" YFigure 1 gives a functional block diagram of the WAV3000 and associated personality
* a/ d4 M: ^1 ]7 ?2 o! l6 `' ~; dmodule (PM). The personality module intends to simulate the host product platform in which the
) R( o, [9 M9 L% U+ X+ [0 cWAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
4 V3 k4 t* y j) `/ m: Dvariety of video sources (analog and digital) for different applications. It also provides o" m& e. I/ W: Q/ u
capabilities for test and debugging of the core module. ; d2 [$ z7 [9 H8 l( |6 F [
3 Functional Specifications The WAV3000 supports standard MPEG Transport Stream input and output in either
, B a8 J% i" U3 r/ LParallel or Serial mode. The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the 4 ]8 Y2 j( C2 m* E4 Q* W/ c
WiViTM wireless networking technology at 5 GHz. Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with $ s( g1 t# O* Q6 ]0 C7 Z$ u9 U
different country spectrum requirements. The system support data rates from 6 Mbps to 60 Mbps. The system supports video bit rates from 3 Mbps to 45 Mbps. Proprietary radio resource control with dynamic frequency selection (DFS) and close-loop
" L2 @5 Q$ n5 a; S( o, w5 bpower control (CLPC). Overall video propagation delay of less than 30 ms. Receive sensitivity is –86 dBm for video rate of 6 Mbps, and –78 dBm for video rate of 20 ' H0 |# B7 B: `7 i+ K4 B2 a# ?
Mbps.
% o) p+ Y! x4 G8 u4 System Security
/ M! u4 k1 e) ?! H1 w9 r/ M, y+ `The communication is authenticated and the media stream is encrypted to assure for - a( g1 W, p) _* q4 @7 B' r
protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit " _/ k) B" l; ]5 e) W3 U0 s
ensures private communications between each pair of units. This also allow for coexistence of 1 _- c! J4 y E( E+ a9 u0 B/ h
multiple pairs of simultaneous operations without cross talk. + {' @0 |+ B! Z7 b+ |% m" T
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