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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: & p+ m4 X0 G! E* P! g# s5 G0 m
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1. Key Features + X3 | _8 l; ~
1) Complete transceiver design of wireless communication at 5 GHz. 9 q! W. E# |! ]4 V
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
% L! R9 {3 n% K! qdifferent country spectrum requirements. - w6 n2 B; {, A" C# }/ c# G
3) Dynamic frequency selection to resist interferences. ! `+ k: V* s4 X5 J
4) Close-loop power control to minimize power consumption and be a friendly neighbor to ; L$ Z" e, v% Q% u- ?% F
other WLAN networks at 5 GHz. 0 K$ |1 u, D- z- x0 i, |
5) Secure networking to assure privacy and content rights protection.
1 G7 B& _/ X& x6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
( O! Z& b+ p5 ~3 DH.264 and VC-1 (WM-9). , G% H) [' ~; S# c
7) Supports point-to-point video connection with full QoS and point-to-multipoint video
$ h- B' v' M2 b# S( Lbroadcasting. + `4 g+ N3 c& [
8) Configurable expansion I/O connector enabling easy integration with existing host
* q0 R* E/ l: _" Ksystems. " i8 V9 j! u5 u* W& L$ ]
9) HCI interface to the host CPU to enable flexible application development at the host level.
7 d) t; G3 X% U' J- s: p10) Transmission of IR control signals to the video source devices from the TV location. 6 O2 g- R# n0 k$ X" b
2. System Diagram
& z0 \7 E4 p3 EWAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
6 h* E; u2 i T3 B. N2 V( itransport stream (TS) communication. The WAV3000 is a complete wireless transceiver module . n" d T+ q) E# G8 I6 U. U, B
that can be integrated as video sender and video receiver according to the host platform. When 5 L9 [1 L o) Y
used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
0 R4 k; M. |+ F5 @5 E1 j1 NSTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
3 N: O! i! y1 m, m5 K2 ndevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
( M( k6 ?+ o2 J }% }glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed ; j$ ?: a0 R ^' _$ J
QoS.
6 F! d1 A: X% F7 e; l' }# _The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
. l8 E# H! O% ]$ `" a8 v Qrouted and configured through the CEC enabling easy integration with existing host systems. 4 z! j' I5 O' r
Figure 1 gives a functional block diagram of the WAV3000 and associated personality ' Q1 I! c, C( f- F" d+ k/ k
module (PM). The personality module intends to simulate the host product platform in which the # N7 _! }1 S, l ^
WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a 8 k8 A1 K0 x" P& [
variety of video sources (analog and digital) for different applications. It also provides " y/ o( @; k& t' g% f$ a
capabilities for test and debugging of the core module. $ W7 s" o$ h, J& ^7 U# V# V; e
3 Functional Specifications The WAV3000 supports standard MPEG Transport Stream input and output in either 5 N3 J. R( J- J# x+ _* D% r
Parallel or Serial mode. The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
9 q/ A" a6 \" W' H. WWiViTM wireless networking technology at 5 GHz. Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with # `% Q8 `- x) R% T: ?: a9 [0 A
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 4 Y# m M& k; B
power 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 % m, N C1 j0 l
Mbps. / v1 {7 T/ M: }% @2 `- M/ c, u
4 System Security
! D1 u6 y, x2 g' VThe communication is authenticated and the media stream is encrypted to assure for
) W2 k( d7 Y0 I% j0 ~1 Fprotection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit 9 C4 t1 S# Y3 ~
ensures private communications between each pair of units. This also allow for coexistence of 5 Y' m' V" k# p* J. _
multiple pairs of simultaneous operations without cross talk.
+ I8 C' z( X% [- [ 此主题相关图片 : n% j# \% c3 q0 y, v: t4 i2 x1 g

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