|
|
发表于 2007-2-10 01:31:38
|
显示全部楼层
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：
: n8 V2 l* h+ O$ @) H+ d/ }1 P, w
q2 g" {* T2 B9 J; _9 K1. Key Features
- d9 z% Y$ i+ e/ A* g$ J1) Complete transceiver design of wireless communication at 5 GHz.
; P+ O- q" |; r) s( h) ]
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
; C: B0 d! I* I Ldifferent country spectrum requirements.
. O* [/ s+ F. {; P$ }) h
3) Dynamic frequency selection to resist interferences.
5 k% L5 [* {& I0 G% _3 p4) Close-loop power control to minimize power consumption and be a friendly neighbor to
% D& _+ I1 y1 ~% y1 h- T; }1 z0 q" M
other WLAN networks at 5 GHz.
2 i7 g! Z% w7 l5) Secure networking to assure privacy and content rights protection.
: S, D7 W M2 B( ~+ y) M# L
6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
" d1 E1 E1 i, q0 nH.264 and VC-1 (WM-9).
: W6 q( [( g$ W7 u! l, T6 b
7) Supports point-to-point video connection with full QoS and point-to-multipoint video
4 F- c( \% c, e& Z9 }broadcasting.
+ g7 \: O3 x# W4 m8) Configurable expansion I/O connector enabling easy integration with existing host
6 c3 v, s9 \4 D B
systems.
$ h& Y2 U3 I' Q" c# c `
9) HCI interface to the host CPU to enable flexible application development at the host level.
8 _" r: L) M7 h- ?- T" j
10) Transmission of IR control signals to the video source devices from the TV location.
: ?5 n6 J* H" h3 R2 U
2. System Diagram
c# N( U5 y( y9 FWAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
& G& ^: V* `" ?, c1 ^
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
5 V1 _ @) A) s( w C
that can be integrated as video sender and video receiver according to the host platform. When
+ V9 }" j+ k" R5 p% [ ^used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
! o0 c, d; I. sSTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
1 p" _+ m. I$ U7 s7 L1 ndevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
* m6 h/ j+ }. d# t" ]) x
glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
; l) d- M& C. t3 E/ ^QoS.
E, j6 M- o" l! U( N0 d s' k
The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
8 U, m& W; E! V, L& `routed and configured through the CEC enabling easy integration with existing host systems.
& }* N) n$ \. q/ R, s8 P1 AFigure 1 gives a functional block diagram of the WAV3000 and associated personality
8 {2 V8 y6 t! e( o" A( }
module (PM). The personality module intends to simulate the host product platform in which the
; V) D& K0 e' s. E7 cWAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
6 r; X1 M8 t; h) H* C, j% V$ P9 \variety of video sources (analog and digital) for different applications. It also provides
- \% V, ~6 X3 [capabilities for test and debugging of the core module.
- F4 b" F# U& y3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
7 E# n C/ u. q& g2 FParallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
$ c$ E# o+ n$ {, PWiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
9 o9 ?. |+ ?" i- x vdifferent 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
V* K& } m: Z) s( y& N! s8 d
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
% `, W+ q& e( `
Mbps.
7 J& M! M& D; C& I9 }$ b' b4 System Security
" T' J+ z) l5 q9 ?The communication is authenticated and the media stream is encrypted to assure for
: U! T! `3 J' A, l1 Q. V$ d) W
protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
% X+ ^+ r [1 v2 [/ Tensures private communications between each pair of units. This also allow for coexistence of
0 z) {1 L0 k0 X8 ^3 c
multiple pairs of simultaneous operations without cross talk.
. T6 u1 Q/ ?$ o& ? d
 此主题相关图片
% p& i" U2 f5 m, H
+ |! O9 B& s9 |3 `* P
< |
|
IP卡
狗仔卡
显身卡
楼主
