Network speaker

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An Internet Protocol (IP) Loudspeaker is an electromechanical transducer that converts an electrical signal into sound. This type of speaker can also be termed an Active loudspeaker, meaning it contains all the electronics to power the drivers. in most all cases this type of speaker also conatins digital signal processing (DSP) means to provide the filter araingments and other signal processing to provide crossover and other tonal functions. Most IP Speaker conatin multiple amplifiers, usually one per driver. IP Speakers are also known as Network Loudspeakers.

Contents

[edit] History

The Patent on IP Speakers was filed on May 2002 (2005013558) Inventors Michael Braithwaite and Herman Cardenas who later went on to found the IP AV company NetStreams authored the Patent and Mr. Braithwaite is considered the father of the IP Speaker. This was later published in the United States Patent and Trademark Office (PTO or USPTO) on June 16th, 2005.

[edit] Designs

The first commercial IP Speaker was produced by Polk Audio under license from NetStreams. Since the Polk Audio LC265i-IP Speaker was released is has won many industry awards for innovation and sound quality.

Today IP Speakers are being produced by four companies, Polk Audio, Sonance, Triad, and Naim Audio.

IP Multicast
IP Multicast
IP Unicast
IP Unicast

The content produced by the DSP in an active IP loudspeaker was communicated across a packet-switched internetwork using IPv4 and IPv6 addressing with a User Datagram Protocol or UDP. The IP Speaker connects to Multicast or Unicast addresses to enable the delivery of streamed data to arrive at a single speaker of many speakers. IP Speakers use a protocol called Internet Group Management Protocol or IGMP to join these groups (Sink devies).

[edit] See also

[edit] References

  1. http://www.freepatentsonline.com/20060287746.html
  2. http://www.netstreams.com
  3. http://www.polkaudio.com
  4. http://www.sonance.com
  5. http://www.triadspeakers.com
  6. http://www.naimnet.com
  7. http://www.soundandvisionmag.com/features/2104/sound-vision-2006-editors-choice-awards-page15.html

[edit] External links