Godkända
Audio över Ethernet med inbyggda system
Erik Lundh (E-06) och Emil Ohlsson (E-05)
Start
2011-06-07
Presentation
2011-10-21 13:15
Plats:
E:3139
Avslutat:
2011-10-21
Examensrapport:
Sammanfattning
Audio over Ethernet using embedded systems. Today people are not satisfied with playing music on one system in one room. Instead they want to be able to play music in several rooms simultaneously using home entertainment systems. These systems are often complicated and/or expensive. This master thesis is about evaluating the different existing system and make a case study by implementing an Ethernet based sound card to be used with PulseAudio. PulseAudio is the audio mixer that is used in most modern GNU/Linux distributions, it act as a virtual layer between the sound card and the application playing the sound stream. This virtual layer can stretch over several computers via Ethernet and makes it possible for a computer to share its' sound card with other computers. The system to be implemented should be relatively simple and cheap, and use standard components, it should be connected to Ethernet and act as virtual sound card for PulseAudio. In this way it is possible to use the existing functionality of PulseAudio to control your audio stream. For smaller systems not requiring a lot of power, Power over Ethernet is an option making the system small and easy to connect only requiring an Ethernet cable. System components: – Hardware platform capable of Ethernet communication containing processor, A/Dconversion and audio output. – Software that makes the card a PulseAudio node. Thesis requirements: – Study and compare the different systems PulseAudio, DLNA, Sonos and Airplay. – Investigate implications of using Power over Ethernet. – Determine needed hardware requirements for the processor and audio parts. – Port necessary parts of PulseAudio for use in a embedded system. Optional: – Implement Power over Ethernet – Support for wireless network – Control of external units – User interface for Android/iPhone
Handledare: Mikael Hegardt (Svep Design Center) och Bertil Lindvall (EIT)
Examinator: Viktor Öwall (EIT)