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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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9 }. E& s) p* g, o, { |/ ?1. Key Features
; a( t9 G6 f& Q: Y! S1) 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.
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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.
0 ~) [) H: {8 v5) Secure networking to assure privacy and content rights protection.
# k, W4 X2 t( y: {( O- j# O3 q6) 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).
' J$ q1 b$ |/ `% A7 F2 m7) Supports point-to-point video connection with full QoS and point-to-multipoint video
5 \. o, e& G; V$ h/ e1 i7 `, bbroadcasting.
3 @' h3 [! y0 S, C3 Y8) Configurable expansion I/O connector enabling easy integration with existing host
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# h3 H, ?0 Y: @& V9 v5 Y! v; g9) 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.
* {. m- ?' a Q' @) R; R' ~% V2. 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
) a. g- ]/ h$ R& L# L- f: zthat 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,
, D+ t3 D0 h- ?6 CSTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
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device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
& `- Y2 s. W3 V- cglueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
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QoS.
+ _# F% [- E; R, Y0 l& m$ u# |The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
! ?! d: Y- P# Zrouted and configured through the CEC enabling easy integration with existing host systems.
7 ^2 T" z$ P: ^( D& ` U7 ~! p% |4 lFigure 1 gives a functional block diagram of the WAV3000 and associated personality
+ V. K3 C! y8 ~3 @5 s& x$ ^9 y/ @+ vmodule (PM). The personality module intends to simulate the host product platform in which the
1 `; J3 ]+ A- UWAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
1 ~9 R! W5 f& i$ N) ~- i0 f# g+ j0 S9 ~variety of video sources (analog and digital) for different applications. It also provides
0 K0 Z+ R: U- U4 E+ ~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
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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
$ m" D7 z q3 [+ d/ P# _The communication is authenticated and the media stream is encrypted to assure for
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protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
! w; a4 V. Y: ?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.
. k; U0 D# z; z( M9 T 此主题相关图片
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