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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
7 u! e, i `6 t5 tdifferent country spectrum requirements.
2 O& k1 `" _ r: U5 L3) Dynamic frequency selection to resist interferences.
1 o2 s: w7 q& i3 Q. \ z- a4) Close-loop power control to minimize power consumption and be a friendly neighbor to
0 L3 K( j' q6 X7 j; s3 v- Cother WLAN networks at 5 GHz.
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5) 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,
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H.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
2 J- w& E/ r, t4 ?& J ~broadcasting.
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8) Configurable expansion I/O connector enabling easy integration with existing host
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systems.
$ C Z# d9 ?$ o* d% ^$ Y: F5 m# t- o9) 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.
; c2 B( `# C3 a1 {+ B8 [' S2. System Diagram
0 e9 K5 v2 H( V" T, N6 dWAV3000 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
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that can be integrated as video sender and video receiver according to the host platform. When
% a' j! y' I5 Gused 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
3 g- r- }, h) W" U: Ddevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
+ X( D N, v0 N$ eglueless 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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routed and configured through the CEC enabling easy integration with existing host systems.
4 w# z& [0 u: m ^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
( }7 |8 k7 ]0 w: J: GWAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
! s0 Q- `/ R+ I4 D1 D, Zvariety of video sources (analog and digital) for different applications. It also provides
, D& H3 }) j" m4 Y* l# I9 v# h% scapabilities for test and debugging of the core module.
0 |. J; o7 r% ^6 c, f' }3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
& E1 Y' E" e4 S' ZParallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
- B" R+ a/ R+ |; hWiViTM 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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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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4 System Security
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The communication is authenticated and the media stream is encrypted to assure for
{6 c. R* C& m. S$ z% C" p: Dprotection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
" e& k$ n7 x8 }0 Y* }* w5 C$ zensures private communications between each pair of units. This also allow for coexistence of
# L+ S) r! v) c. l1 o; }multiple pairs of simultaneous operations without cross talk.
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