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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
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different country spectrum requirements.
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3) Dynamic frequency selection to resist interferences.
! o* G4 U( E/ Z, H* k: z; ?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.
3 r& b5 n4 s3 m' z5) Secure networking to assure privacy and content rights protection.
- g5 b) A5 G/ `0 V& x6) 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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broadcasting.
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8) Configurable expansion I/O connector enabling easy integration with existing host
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* f1 Y. t# H7 ~0 h% W2 e; }9) HCI interface to the host CPU to enable flexible application development at the host level.
! s3 o9 T- q1 z7 J10) Transmission of IR control signals to the video source devices from the TV location.
) I9 b' k( \6 X" f6 Z2. System Diagram
% k O4 w6 J% F5 `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
& n5 T" |: M6 r% y/ U0 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,
- g4 @- O3 J; R3 [STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
- B+ U- U4 |3 qdevice (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
. b* Z# I' z/ d/ dglueless 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
; e8 q, |; h0 ]0 [' p9 g" _$ Y3 ^routed and configured through the CEC enabling easy integration with existing host systems.
- o; ^0 J. L( d5 U2 C3 |" j2 QFigure 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
% `& l* Z/ T$ A! q: i% hWAV3000 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
1 [2 D* B, }5 O9 dcapabilities 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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Parallel or Serial mode.
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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Mbps.
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4 System Security
7 l9 r: ~1 M# N; e, l: ?4 j ]The communication is authenticated and the media stream is encrypted to assure for
3 m% v: g; ^+ Wprotection 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
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multiple pairs of simultaneous operations without cross talk.
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