Article from @Flickr: Family av friend
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In IP network monitoring system, between audio and video signals exist interference problems .Although the audio and video signal data in the same IP network to separate the transmission, there is no interference in theory, but in the installation should consider the location of the connection.For example the wiring distance should be with the radio transmitter, the high voltage cable and the old street lamp.
Analog camera's audio and video system integrationcan use shielded cable to prevent signal interference . Use independent transmission cable is a very necessary stepin analog monitoring system.Most of the signal interference is caused by the distance from the high voltage cable. It is recommended to use the multi audio encoder, the most critical is to ensure that the lowest line of analog signal wiring.
Monitoring system,external microphone, speaker deployment is too dense also would cause sound interference , echo occurs in the audio input and output sound cycle, in order to avoid this kind of echo, installation the microphone and loudspeaker in a reasonable position, and another method is through a special codec to eliminate echo, using digital filter to eliminate audio echoes.
The security industry focused on video management, which is helpful for security work. Video information can help managers assess the surrounding events, on the other hand, the characters in the video facial expression to achieve a visual clue. At present, audio analysis is gradually added to the video monitoring system, the most popularapplication is the visual access audio and video intercom system, in order to carry forward in the security industry, but also to broaden its scope of application.
In the market promotion of audio application does not smooth. This integrated solution does not enable users to understand the true strength. Video analysis technology can scan the situation at that time by software, it can be achieved even if it’s in the conversation. But it cannot reach the real audio scene, so the application is not popular.
It takes a period of time to change people's thoughts about audio and video integration . First, customer should knows the capabilities and limitations of audio analysis . Audio analysis can serve as an warning system, but the procedures still need to capture video, then people react quickly, VMS integrated system is capable of handling a series of problems, need a few seconds to determine whether subsequent decision.
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Connect the Wireless TV Sender for family entertainment
HDMI (Full name: High
Definition Multimedia Interface), HDMI is type of Digital Audio/Video
Connection Jack, it’s for transmission digital AV Signal , HDMI could
transmission audio and video at the same times, The maximum data transmission
speed is 5Gbps. And it’s no need to convert Digital to Analog or Analog to
Digital signal before transmission. HDMI also support HDCP(High
-bandwidth Digital Content Protection) to prevent unauthorized copying of
copyrighted audio and video content. The extra space available in HDMI can be
used in future audio and video formats. And because a 1080p video and an
8-channel audio signal needs less than 4Gbps, so there is a lot of storage .
This allows it to connect the DVD player, receiver and PRR with a single cable.
HDMI advantages
HDMI not only meet
the resolution of 1080P, but also supports DVD Audio and other digital audio
formats, support for eight-channel 96kHz or 192kHz stereo digital audio
transmission. HDMI support EDID, DDC2B, so HDMI devices support "plug and
play", between the source and the display will automatically
"negotiate", automatically select the most appropriate video / audio
formats. Compared with DVI , HDMI interface with smaller size, DVI cable length
can not exceed 8 meters, otherwise it will affect the picture quality, and HDMI
can be transmitted up to 15 meters. As long as an HDMI cable, you can replace
up to 13 analog transmission lines, can effectively solve the home
entertainment system behind the connection tangled problem.
HDMI development
HDMI Licensing, LLC
released HDMI Specification Version 1.4a on March 4, 2010, featuring key
enhancements to 3D applications on behalf of HDMI Original Developers, the inclusion of mandatory 3D formats for
broadcast content, and the Top-and
-Bottom's 3D format. As the "HDMI 1.4" no clear boundaries , can not
display the specific support of the device technology, so in this specification
completely ban the use of "HDMI version 1.4" of this version number
identification method. According to the new version of the "Trademarks and
Logo Usage Guidelines", HDMI cable manufacturers prohibit the use of
version numbers when selling and promoting HDMI version 1.4 cables. Older
cables should be removed within one year from all versions identified by the
version number Labels, instructions, packaging and so on.
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Did you have HDMI Wireless AV Sender?
Most families own not just one television, because there are multi rooms in their house. But they do not wish to buy multi cable box(set top box) and pay the month fee on it, and running many wires in room.
