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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.
+ F4 U, w! c4 o7 Y/ s2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
7 p& {+ V3 H/ r5 @8 b* {, i: T) _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
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other WLAN networks at 5 GHz.
3 A% u" t9 u3 e' ^7 y+ E7 G, N3 S5) 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,
1 Q$ e! W3 J# ^4 F+ kH.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.
2 n l* v$ t: M8) Configurable expansion I/O connector enabling easy integration with existing host
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) r$ O$ M' b- g9) 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.
+ h; ^. F" m9 F8 t- X% |* Y2. System Diagram
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WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
! R! b& E! N% T. B4 Q1 @/ Vtransport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
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that can be integrated as video sender and video receiver according to the host platform. When
" z" s: j6 X4 ?' c* N! xused as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
% D7 ^9 h' y6 C6 A2 H( BSTB, 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,
& G5 v# L" ~& h2 A0 w# g8 Kglueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
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2 W( Q* y6 q4 L4 KThe WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
2 g7 Q7 c! `3 Hrouted and configured through the CEC enabling easy integration with existing host systems.
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Figure 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
( V1 M& ]. F% D5 i# e. X- xcapabilities 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
1 h4 a1 q; o: j4 D# _: XParallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
# ] a L/ u4 T3 L& M$ F$ rWiViTM 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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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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- j+ K% t0 j; I$ V4 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
; n! M: ~2 `8 l0 I: R9 @! kmultiple pairs of simultaneous operations without cross talk.
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