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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
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1) 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
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different country spectrum requirements.
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3) Dynamic frequency selection to resist interferences.
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4) Close-loop power control to minimize power consumption and be a friendly neighbor to
6 q$ T3 c" ?0 ~$ a- y/ o. Nother WLAN networks at 5 GHz.
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5) Secure networking to assure privacy and content rights protection.
L. U0 G) T8 q$ v5 a6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
8 ]1 U' Y `3 n- g# M0 oH.264 and VC-1 (WM-9).
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7) Supports point-to-point video connection with full QoS and point-to-multipoint video
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broadcasting.
+ @( D+ W# a( V- c8) Configurable expansion I/O connector enabling easy integration with existing host
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9) 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.
% l) I Z' n% D( k+ D1 g. [2. System Diagram
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WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
6 l. }/ m6 v3 ^; V1 U1 {4 qtransport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
% k, s7 q1 D' w% `: Fthat can be integrated as video sender and video receiver according to the host platform. When
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used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
2 [/ M- e/ [% p1 KSTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
0 e$ O/ X. D. F3 Kdevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
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glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
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The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
' e5 z' d" o6 m! A9 b7 B& L3 Yrouted and configured through the CEC enabling easy integration with existing host systems.
9 U& W7 A* `% S+ h4 MFigure 1 gives a functional block diagram of the WAV3000 and associated personality
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module (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
% z$ ~, M) l, d$ D9 ?variety of video sources (analog and digital) for different applications. It also provides
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capabilities for test and debugging of the core module.
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3 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
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WiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
7 ~; S7 j( y) v" U+ }$ [# T2 Gdifferent 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
8 X. I" d& K c( h1 F: Mpower 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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# b" t3 y2 u, g6 c4 System Security
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The communication is authenticated and the media stream is encrypted to assure for
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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
5 e* p$ X9 [% K- ~multiple pairs of simultaneous operations without cross talk.
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