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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
1 x$ f) ~5 a/ h$ |different country spectrum requirements.
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3) Dynamic frequency selection to resist interferences.
" n' W5 H7 Q/ T6 h) U, L4) Close-loop power control to minimize power consumption and be a friendly neighbor to
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other WLAN networks at 5 GHz.
+ |' ]* w. ~% Z5) Secure networking to assure privacy and content rights protection.
3 p: R& N4 F E# F" D8 }9 g6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
) \! V# e" T: jH.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
: |, t+ Q: |/ t; d$ w$ [, Gbroadcasting.
6 u. o6 C0 T9 K. j3 D7 T9 g8) Configurable expansion I/O connector enabling easy integration with existing host
1 |+ z" u! h5 R w" y9 \systems.
: O, p5 N/ S# @7 f. D1 t9) HCI interface to the host CPU to enable flexible application development at the host level.
% R& Y8 L8 G" ~" l9 D10) Transmission of IR control signals to the video source devices from the TV location.
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2. System Diagram
9 c# W$ c/ j2 M9 j% W+ sWAV3000 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
0 P3 J6 r+ l. V0 Athat 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,
, i8 \! x- j2 QSTB, 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,
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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
2 S7 ^9 B/ ^6 M% A' U7 U) \routed and configured through the CEC enabling easy integration with existing host systems.
! y! @' S+ L# R9 @# eFigure 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
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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.
, a! w. X1 H# U5 ^( B0 y3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
( b/ t2 \$ i& h4 h1 u/ FParallel 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
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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
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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.
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4 System Security
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The communication is authenticated and the media stream is encrypted to assure for
6 d- w. G Q7 P7 Eprotection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
) H& S, F J3 x9 Densures private communications between each pair of units. This also allow for coexistence of
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multiple pairs of simultaneous operations without cross talk.
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