Saturday, 11 June 2011
Meeting Eight

Meeting Eight

Open-source Hardware

http://www.arduino.cc/

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.
Audio Formats
     - Ogg
     - MP3 and others

Audio had been digitised and stored into different formats. When you convert into an analog, the audio file (digital format) can be quite large.

Lossy encoding à Occur when you try to do sampling, making approx. 44.1 samples in 1 second. Hence, between the seconds, you cannot differentiate the changes in the pitch and so on because human hear cannot hear so detail. Hence, you are losing information. It is thus lossy encoding.

MP3 format is patented, hence, if we want to play a MP3 song, we actually cannot play it from the CD. We are not allowed to do so. Some of the patents are not applicable elsewhere, hence we can put the software or the code into a website of a country that the patent is not applicable. Hence, we get to use the MP3 nowadays.

OR, we could look at alternate formats à vorbis.com à trying to create the same ability to encode into a particular format of audio (ogg) and video. à This is patent-free and you can implement it everywhere. 

Video Formats:
     - MPEG
     - webm
     - flash

 

Adobe Flash is the reason why Youtube can work. It is proprietary.

Webm is similar to OGG in a certain way but it can put in video similar in format to the flash video. This is meant for delivery over the net. If you do not have flash, you can still view youtube via WebM bcos WebM is similar to flash.

 



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