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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: . u2 f1 g2 D0 G, w/ T/ |6 U
2 i$ i" E1 `% G. T# D1. Key Features , Y6 y6 z9 O. p# @( q# [
1) Complete transceiver design of wireless communication at 5 GHz. 9 V; C) b6 r. T6 z2 ]4 H
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with 5 \/ [5 v' T8 a2 s6 C" P( W
different country spectrum requirements.
1 E& | o( o" ~8 _1 A. S/ T3) Dynamic frequency selection to resist interferences.
, g9 a! q4 ^ e, Q: a4) Close-loop power control to minimize power consumption and be a friendly neighbor to
0 k8 S" z! l' Z0 b1 D' ]other WLAN networks at 5 GHz. $ E8 V1 l! o% K' Z
5) Secure networking to assure privacy and content rights protection. 2 D2 A+ i4 b' Y5 ~* D! l
6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4, * u: X" w3 V, J2 z1 i$ o
H.264 and VC-1 (WM-9). # `1 w' [$ l* F# ^* ~$ @5 i6 x$ l
7) Supports point-to-point video connection with full QoS and point-to-multipoint video 1 i2 i% G! c' e, r' l
broadcasting. ) i* ^( U' K. K+ o U
8) Configurable expansion I/O connector enabling easy integration with existing host
, E @% P7 ~) o% z o1 u$ B: a( q' Usystems.
2 ~& }- y% o( G8 N' c9) HCI interface to the host CPU to enable flexible application development at the host level. ( x ?, X$ i' o" B
10) Transmission of IR control signals to the video source devices from the TV location.
f9 d4 c! h- _9 h/ n- u2. System Diagram . k4 T9 E h1 h' {' L: _! @" a
WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG " K9 a; a& n6 e. R& V7 K& J- p
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
, g9 R Y8 e( ~) U d' `8 Dthat can be integrated as video sender and video receiver according to the host platform. When ) r3 ~0 d) a; @/ |( I4 E
used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR, 6 A# s; K, ^' R5 Q8 i; [4 j I2 ~
STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
/ M1 Q. s( b6 fdevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete, . a+ L! B, G: r" J
glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed - H) U4 \4 t& W7 X& z) O0 R# R% y
QoS.
) i, }: M2 w7 @7 `8 |1 XThe WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
: h( o! ]" H/ N2 Trouted and configured through the CEC enabling easy integration with existing host systems.
# U: W* R0 w4 S f5 G6 s$ x0 mFigure 1 gives a functional block diagram of the WAV3000 and associated personality ( Z5 Z1 s& p7 c
module (PM). The personality module intends to simulate the host product platform in which the - u) E* o3 f7 J" P x# Q" `0 s
WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
, y. p2 p! c" m! ^2 zvariety of video sources (analog and digital) for different applications. It also provides
+ o1 \6 ?/ g" c0 V/ R1 Y2 e9 Mcapabilities for test and debugging of the core module. ' l% d8 ~# N/ K: W' g! k. t2 ?
3 Functional Specifications The WAV3000 supports standard MPEG Transport Stream input and output in either ( x" W7 \- ]1 j4 ^3 N' U
Parallel or Serial mode. The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
9 X9 c# N' {/ H; lWiViTM wireless networking technology at 5 GHz. Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
( c, W) D9 y) [/ l, Odifferent 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 " N3 @3 [6 ?( t: E& j
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
, U9 e: x3 \: iMbps. ) F: x' }5 x: M+ {: e$ M* o
4 System Security ( I. S- `6 M+ r! R4 G
The communication is authenticated and the media stream is encrypted to assure for ! ^6 G+ k8 J U3 A5 ~: J ?
protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
~" f" m4 e6 K* |) C. q2 g! \ensures private communications between each pair of units. This also allow for coexistence of 1 R$ |! ?3 i* g1 L- H7 y4 Q2 y
multiple pairs of simultaneous operations without cross talk. ( d0 x) w6 R" i" c4 l; e' X; N' C
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