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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
3 r1 v% x6 G9 C9 U+ }, S2 c- p1) 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
; \. B% r9 T; b+ P/ idifferent 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.
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5) Secure networking to assure privacy and content rights protection.
$ o: q% u2 b8 y& F q- s6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
# p2 Q9 X, B( P" qH.264 and VC-1 (WM-9).
) ?4 M# {' Q2 T& U& ]3 X/ a7 O7) Supports point-to-point video connection with full QoS and point-to-multipoint video
5 O; H% i1 I/ v4 zbroadcasting.
* W& S; i8 V. E( k: l; S, F: `+ A8) Configurable expansion I/O connector enabling easy integration with existing host
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2 j* r# ?8 v$ b9) 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.
. ~8 j" ]& d' Q2. 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
3 i& ^5 V5 z+ V% m& K7 B/ Jthat can be integrated as video sender and video receiver according to the host platform. When
3 f' z& B4 R. k) |* V9 Z' G6 Lused 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
7 s" Y" @* B9 C8 ]9 r6 Jdevice (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.
* r0 g) @0 ^2 i: ^" o% J1 TThe 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
4 U6 Q# z k/ Kmodule (PM). The personality module intends to simulate the host product platform in which the
3 z6 P7 G7 K; S- y; ?+ f* P7 F9 l& ^ MWAV3000 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.
" K! A3 C# B0 {. U3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
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Parallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
* l, ~$ |$ \5 n; ]WiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
2 F# R) f2 T& z* Rdifferent 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
8 k! o2 y# W: g2 Q# T K4 zpower 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
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ensures private communications between each pair of units. This also allow for coexistence of
" {, j; I7 Q% R& c( rmultiple pairs of simultaneous operations without cross talk.
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