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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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3 M) h+ x. ?& }& j1 J, k }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
" p. g9 }* u6 ]# D) t8 [! F: z; Cdifferent country spectrum requirements.
5 K1 q& b& D) L6 h$ l3) 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.
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5) Secure networking to assure privacy and content rights protection.
$ z+ l6 K6 y4 g2 C7 D4 }3 E6) 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).
/ w8 {: t# b7 w4 M% D7) Supports point-to-point video connection with full QoS and point-to-multipoint video
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broadcasting.
3 w+ S7 `* h* i6 r4 q8) Configurable expansion I/O connector enabling easy integration with existing host
8 Z# L* ~9 V' t0 ~$ V' `- c* ~, Dsystems.
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9) HCI interface to the host CPU to enable flexible application development at the host level.
. K9 l& n6 V4 P$ R10) Transmission of IR control signals to the video source devices from the TV location.
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2. System Diagram
2 H# L5 j. R- x2 A. k' vWAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
, d! J/ z: z% R. h4 Otransport 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; V/ C0 K) aused as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
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STB, 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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QoS.
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The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
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% t9 `0 N% r8 X* g3 @4 fFigure 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
7 ]! a! K2 L z, {: nWAV3000 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.
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3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
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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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* Y3 z Z% s3 Y4 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
u0 c( M" Q- N8 d7 pensures private communications between each pair of units. This also allow for coexistence of
- l& Q5 N4 i+ g+ d4 m+ D! j: W! C4 mmultiple pairs of simultaneous operations without cross talk.
3 j# @- c# b# Z9 X9 k: F8 n$ c# {& F 此主题相关图片
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