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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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+ s% S$ R9 ^* i* I7 p& l) e# i1. Key Features
H" b" h7 T9 M; s: o1) Complete transceiver design of wireless communication at 5 GHz.
- e. f, o7 z5 |. z+ U" j2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
/ C9 H5 D7 ]- b3 V2 {different country spectrum requirements.
* x5 _4 R# B& g( ]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.
$ f+ d! c- K# I8 z% F' E5 T/ l* `5 _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
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6 W: R1 \8 d8 B/ E9 ^4 {* o8) 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.
6 k" E/ p1 f9 q1 y R5 s10) Transmission of IR control signals to the video source devices from the TV location.
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2. System Diagram
5 S9 J1 z8 [/ z* b0 | KWAV3000 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
/ _5 Q5 I b9 w n2 tthat can be integrated as video sender and video receiver according to the host platform. When
/ R- L- d) s- T& d Z4 m. Xused 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
# v% K& u; O, L1 K! c- Ydevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
7 b6 P' D" Y- f+ B x; }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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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
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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
7 j" D0 z7 W! A& W/ { f. K0 } evariety 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.
6 M3 z# Q) R$ ~9 q& W8 Y3 c3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
* |* ~5 o( Z6 P! O) x2 Y7 t1 ]Parallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
3 R. a K0 X( [6 O8 F0 zWiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
& U' G% t# m: adifferent 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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- ^" m+ j7 m# {. K. x \. x0 [4 System Security
o) w6 R& q! A8 B7 CThe communication is authenticated and the media stream is encrypted to assure for
2 P6 y; K( c' h$ N6 }4 B6 g; yprotection 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 S8 H* X) v0 e" Q+ rmultiple pairs of simultaneous operations without cross talk.
7 ~# w+ C& z- B) y 此主题相关图片
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