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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:
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1. Key Features ( v+ N5 O/ B- R
1) Complete transceiver design of wireless communication at 5 GHz. 7 R4 d# V2 |8 S$ y/ l- G
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
. E! @( W0 {. r% c+ w$ W5 tdifferent country spectrum requirements.
/ z7 W8 ?# i- D4 C3) Dynamic frequency selection to resist interferences.
- h) C. {5 [( X2 v- X. Q+ y _ J( A4) Close-loop power control to minimize power consumption and be a friendly neighbor to * a9 U" l. B: c/ c
other WLAN networks at 5 GHz.
, g, e7 O$ s' { I& S5) Secure networking to assure privacy and content rights protection.
/ _& t3 s; }& Y! W0 A3 ^6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4, ! r8 r0 f) }2 G
H.264 and VC-1 (WM-9).
- E+ u6 ?& r2 j9 u: U6 c V- W2 h- ^2 N7) Supports point-to-point video connection with full QoS and point-to-multipoint video
8 I& g& ?4 U" b( t0 h6 d; Hbroadcasting. ' G; a7 m7 n% |& e1 _
8) Configurable expansion I/O connector enabling easy integration with existing host
, v8 G7 x: v" I8 @4 Gsystems. ! G# y4 K3 \' O o. F6 U
9) HCI interface to the host CPU to enable flexible application development at the host level.
q* a! ?. i0 b" F/ i- t. F, [. F10) Transmission of IR control signals to the video source devices from the TV location.
/ P$ s5 ^8 h. ^3 {& }0 |% G2. System Diagram / @* o, d: B* z) f
WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG " Q( `& ` v4 s) {
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
) h* @7 f( ?! N# x @! u, ^7 ~that can be integrated as video sender and video receiver according to the host platform. When - Z5 \$ M; q. L* I
used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR, , P3 q5 L& {5 ~
STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display ; p2 x5 O0 ?% A: t w( N
device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
; ^8 Z* {8 A6 T5 D$ e6 K/ uglueless wireless connection from TS (of video source) to TS (of video display) with guaranteed ! x7 b+ K* t: E, z2 G
QoS.
- l' J4 x% H: JThe WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
: R% j3 g1 V7 j+ x) c, Grouted and configured through the CEC enabling easy integration with existing host systems. 3 a; E9 u Z6 t# W
Figure 1 gives a functional block diagram of the WAV3000 and associated personality 2 k7 }1 R" V4 i: c- J* ]
module (PM). The personality module intends to simulate the host product platform in which the
0 T/ Z2 f& s3 d9 }3 @9 F- Q/ \WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a 9 V7 M1 {! D m5 }) h
variety of video sources (analog and digital) for different applications. It also provides J( f* p* j6 g
capabilities for test and debugging of the core module. 0 a5 }9 e( F1 o, {4 n
3 Functional Specifications The WAV3000 supports standard MPEG Transport Stream input and output in either * Q* [' X1 M7 E
Parallel or Serial mode. The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
( p- f. `' P6 h- q i7 I! N2 AWiViTM wireless networking technology at 5 GHz. Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
( V* `8 T2 I# _1 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 6 b6 J' f; L3 d6 M }+ O+ U
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 & b0 G \, r. r5 k N
Mbps. , E# @1 L5 X6 l* }6 E, [8 S
4 System Security
+ ?: S, ? j5 n3 ^# @The communication is authenticated and the media stream is encrypted to assure for
' N( U- o( U, B0 \protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit `8 E! J# H* c! Z
ensures private communications between each pair of units. This also allow for coexistence of
: ]3 G* y, @ ~" M; j& [multiple pairs of simultaneous operations without cross talk. - |, t% U) _/ Z4 O
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