lyman 发表于 2007-2-5 06:13:22

re:可以用微波,还可以是WIFI

可以用微波,还可以是WIFI

njit 发表于 2007-2-5 07:22:32

re:1. 要看他的预算2。 让甲方把所有...

1. 要看他的预算<br>
2。 让甲方把所有的要求提出来再设计方案。<br>
3。 不能让甲方随心所欲的改方案。<br>
4。 我们可以提供2.5M 的realtime数字图像,他有那么多的钱吗? <br>
一定要有自己的完整方案,甲方很会赖皮的。我们去年吃亏大了去了。<br>

tension09860 发表于 2007-2-6 21:57:35

re:我现在用的这种是29个波段的,我用的发射...

我现在用的这种是29个波段的,我用的发射机只能用其中的四个波段,13.15.17.19<br>
如果设备数量再多的话感觉做起来比较麻烦。<br>
另外还有个问题就是设备的室外放置问题,大部分接收设备不具备防水功能,而且只带一个大约10CM的天线,室外安装的话对防水造成了很大的困难。

dongtiandeying 发表于 2007-2-8 18:54:33

re:有经验的 上来说两句,我也想学学

有经验的 上来说两句,我也想学学<br>

xudl 发表于 2007-2-8 21:18:59

re:只做过银行的远距离无线网络,监控无线产品...

只做过银行的远距离无线网络,监控无线产品没怎么接触过,关注中啊

Gaffer_tam 发表于 2007-2-10 01:31:38

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:<br>
<br>
1. Key Features<br>
1) Complete transceiver design of wireless communication at 5 GHz.<br>
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with<br>
different country spectrum requirements.<br>
3) Dynamic frequency selection to resist interferences.<br>
4) Close-loop power control to minimize power consumption and be a friendly neighbor to<br>
other WLAN networks at 5 GHz.<br>
5) Secure networking to assure privacy and content rights protection.<br>
6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,<br>
H.264 and VC-1 (WM-9).<br>
7) Supports point-to-point video connection with full QoS and point-to-multipoint video<br>
broadcasting.<br>
8) Configurable expansion I/O connector enabling easy integration with existing host<br>
systems.<br>
9) HCI interface to the host CPU to enable flexible application development at the host level.<br>
10) Transmission of IR control signals to the video source devices from the TV location.<br>
2. System Diagram<br>
WAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG<br>
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module<br>
that can be integrated as video sender and video receiver according to the host platform. When<br>
used as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,<br>
STB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display<br>
device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,<br>
glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed<br>
QoS.<br>
The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be<br>
routed and configured through the CEC enabling easy integration with existing host systems.<br>
Figure 1 gives a functional block diagram of the WAV3000 and associated personality<br>
module (PM). The personality module intends to simulate the host product platform in which the<br>
WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a<br>
variety of video sources (analog and digital) for different applications. It also provides<br>
capabilities for test and debugging of the core module.<br>
3 Functional Specifications<br>The WAV3000 supports standard MPEG Transport Stream input and output in either<br>
Parallel or Serial mode.<br>The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the<br>
WiViTM wireless networking technology at 5 GHz.<br>Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with<br>
different country spectrum requirements.<br>The system support data rates from 6 Mbps to 60 Mbps.<br>The system supports video bit rates from 3 Mbps to 45 Mbps.<br>Proprietary radio resource control with dynamic frequency selection (DFS) and close-loop<br>
power control (CLPC).<br>Overall video propagation delay of less than 30 ms.<br>Receive sensitivity is –86 dBm for video rate of 6 Mbps, and –78 dBm for video rate of 20<br>
Mbps.<br>
4 System Security<br>
The communication is authenticated and the media stream is encrypted to assure for<br>
protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit<br>
ensures private communications between each pair of units. This also allow for coexistence of<br>
multiple pairs of simultaneous operations without cross talk.<br>
<IMG onmouseover="javascript:if(this.width>520)this.width=520;" src="../leadbbsfile/fileType/jpg.gif" onload="javascript:if(this.width>520)this.width=520;" align=absmiddle border=0>此主题相关图片<br>
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woxingwosu 发表于 2007-2-13 17:39:07

re:楼上的能给翻译成中文吗?

楼上的能给翻译成中文吗?

liangyanlb 发表于 2007-2-13 17:40:00

re:使用无线IP的是可以做的,用802.11...

使用无线IP的是可以做的,用802.11A,或802.11B,等,那些是可以实现的啊<br>
可以联系我啊QQ358537237

dqbyt 发表于 2007-2-20 17:31:40

re:学习中

学习中

5y5y2222 发表于 2007-2-22 04:33:59

re:我也不清楚来学习

我也不清楚来学习
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