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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
. j! A+ ]! N( {- F1) Complete transceiver design of wireless communication at 5 GHz.
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2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
$ y7 c$ ]3 |' ^1 w0 v+ `7 m7 b, Ldifferent country spectrum requirements.
: K8 b' }5 a2 y3) Dynamic frequency selection to resist interferences.
0 }9 X# w1 m1 Y3 r) Q4) Close-loop power control to minimize power consumption and be a friendly neighbor to
! Y7 P Z( ?# x: ]other WLAN networks at 5 GHz.
" j7 @$ |6 W$ o. ^& W& V$ z/ M5) Secure networking to assure privacy and content rights protection.
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6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
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H.264 and VC-1 (WM-9).
$ D, y Y1 H1 B7 m7 T7) Supports point-to-point video connection with full QoS and point-to-multipoint video
4 v8 t( A6 L" ^' abroadcasting.
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8) Configurable expansion I/O connector enabling easy integration with existing host
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% X+ o" n, J4 U3 O/ T9 ~: q9) HCI interface to the host CPU to enable flexible application development at the host level.
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10) Transmission of IR control signals to the video source devices from the TV location.
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2. System Diagram
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WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
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transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
5 L" R0 z0 ]9 ^# _that can be integrated as video sender and video receiver according to the host platform. When
% a( c; T; Q; ~used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
' U; A8 Y! M9 W$ Z$ o; j3 ISTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
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device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
4 S! D9 A1 }% y4 l+ V+ `glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
& Z, j! ^2 y# i$ uQoS.
X" r" n6 q% ?The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
4 X! w3 S% E6 f/ p8 Vrouted and configured through the CEC enabling easy integration with existing host systems.
' [; A2 u9 i& g! r, M/ P" eFigure 1 gives a functional block diagram of the WAV3000 and associated personality
7 b7 r/ B8 h G- jmodule (PM). The personality module intends to simulate the host product platform in which the
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WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
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variety of video sources (analog and digital) for different applications. It also provides
7 O5 S: Q- A' {9 W l/ U* ccapabilities for test and debugging of the core module.
! X4 |# o" e, R t1 i- G+ J: f3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
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Parallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
. M8 y% `7 J; A3 tWiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
2 Z9 ?* t7 D3 X/ l2 Xdifferent 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
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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
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Mbps.
( O8 U& s: G0 D; s2 ^4 System Security
, F7 q _, t2 |: B- zThe communication is authenticated and the media stream is encrypted to assure for
* z1 r6 D; y9 ^protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
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ensures private communications between each pair of units. This also allow for coexistence of
2 X% e# P6 d) ]& L! b8 B S6 [multiple pairs of simultaneous operations without cross talk.
: r) T3 Q5 O& I- {' D 此主题相关图片
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