|
|
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：
) X5 ^+ _# ?+ Z v- X4 Q
1 i5 [1 o9 Y2 I/ I% g1. Key Features
( u- W' o W1 g6 g u
1) Complete transceiver design of wireless communication at 5 GHz.
3 r$ G5 L& x( g* k* _
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
2 W- r4 h/ W4 ~
different country spectrum requirements.
! ]6 C. u; f+ n: }. w4 k3) Dynamic frequency selection to resist interferences.
) \: O* \' s5 V% M6 F4) Close-loop power control to minimize power consumption and be a friendly neighbor to
' E; x- y6 Z) u
other WLAN networks at 5 GHz.
' B' i' K& b% }; D8 k5 u5) Secure networking to assure privacy and content rights protection.
/ _+ x1 p; |, W. t6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
7 L6 e3 O) f+ I" J" R, X; jH.264 and VC-1 (WM-9).
" I% [8 f d9 l% C7) Supports point-to-point video connection with full QoS and point-to-multipoint video
) z/ }) w* {& H- m% E
broadcasting.
& g0 D* x) m' X' U8) Configurable expansion I/O connector enabling easy integration with existing host
8 W) P o+ E% |0 f2 F$ ?% W
systems.
8 |1 F0 Q, K, A+ m+ G4 I8 ]9) HCI interface to the host CPU to enable flexible application development at the host level.
: _5 A# C: |& S1 }6 g+ X. P
10) Transmission of IR control signals to the video source devices from the TV location.
6 `2 t+ k; K. [% `% g7 a
2. System Diagram
- @9 y2 g. ]8 e& ?WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
& y. s4 ~( H, Q- u& Z! b* u3 S
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
* O9 u4 B% W! b. z( l3 [0 w' X5 ]
that can be integrated as video sender and video receiver according to the host platform. When
2 S: J. T6 n/ {" r& E- [6 b) Lused as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
- d8 O; o1 ^0 V& H: k
STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
. s4 R% M, h M$ A/ h
device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
( ~8 |' e% F9 @; T# \glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
Z0 j6 R+ G& KQoS.
+ m: o6 l7 H6 }( T% G
The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
T- f# x9 j$ J' d# T" Qrouted and configured through the CEC enabling easy integration with existing host systems.
9 k& j g3 ? M! s
Figure 1 gives a functional block diagram of the WAV3000 and associated personality
: [' R& C) ]7 V6 A: i# tmodule (PM). The personality module intends to simulate the host product platform in which the
. G* f8 z7 @+ rWAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
% E$ H4 h! a3 G, c3 [7 Kvariety of video sources (analog and digital) for different applications. It also provides
" z! V( K" O+ R5 d, U
capabilities for test and debugging of the core module.
6 p. a. k0 N8 P2 p% ?% a f3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
' d C5 L: C/ X- m2 |4 g/ b
Parallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
, f% R, g: o6 m; D5 e' `
WiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
/ c/ O* H. i, r5 f" a. ]( 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
' ^( Q8 c/ V. N+ ] E4 `3 L' Z/ 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 f/ G: i+ k4 N' J' P! E% q; FMbps.
2 g, i/ |0 E) [6 k9 b& G
4 System Security
& N8 X" ^. ?7 S' \& O, UThe communication is authenticated and the media stream is encrypted to assure for
( `) g2 M* s; W# l; i$ D% D1 k" vprotection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
4 H8 B$ s% h9 {0 r- P5 O( s1 gensures private communications between each pair of units. This also allow for coexistence of
# [, K$ V# Z1 t2 @8 N; f- X
multiple pairs of simultaneous operations without cross talk.
2 G6 y- a' W. Y. W! E. ^: G( l
 此主题相关图片
" w. Q6 A7 l3 b3 b" W4 K
5 r" o5 P# B( W8 L< |
|
IP卡
狗仔卡
显身卡
楼主
