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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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! Z* g/ X5 h- K2 ^1. Key Features
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1) Complete transceiver design of wireless communication at 5 GHz.
( G/ ]6 F9 Z" G; B" S2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
5 p$ Z9 f: l6 u. O3 jdifferent country spectrum requirements.
7 E" h, F1 K" y; y7 Q3) 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.
; G X' _2 ^ ]1 G: u% O: F0 R5) Secure networking to assure privacy and content rights protection.
2 R7 f; k6 s8 Z: R% T4 g6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
/ O, I/ p1 d9 W) }H.264 and VC-1 (WM-9).
0 \% R. k G" X0 Q5 m( o7) Supports point-to-point video connection with full QoS and point-to-multipoint video
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broadcasting.
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8) Configurable expansion I/O connector enabling easy integration with existing host
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systems.
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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.
' W, ^- i1 r; v& E2. 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
1 G7 G: j# ?1 L! f" ^4 V% x# R' Ythat 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,
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STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
& c, f$ d4 _4 Q2 `+ z5 a3 a/ [device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
- L; d5 D$ |% b& K& Lglueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
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QoS.
4 r: Q5 }" v- E, U- r5 I& U: sThe WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
& e9 U) v8 j3 V; ]routed 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
: K! ^" A5 g$ k" c9 r# o1 wmodule (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
- Q9 s0 O3 `$ C# N" Y2 Xvariety 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
1 Q/ u2 `; Z2 I6 n9 GParallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
1 _+ C Y1 @' H* D2 L8 b. fWiViTM 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
5 U9 W; A# k% Z9 Qprotection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
" G) }+ W: P$ d0 Yensures private communications between each pair of units. This also allow for coexistence of
, V9 s+ R5 h( \) e, [multiple pairs of simultaneous operations without cross talk.
m1 S# ^: E' ?; a8 f6 t9 u+ t 此主题相关图片
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