hello
i have think to implement mp3 player but i don't which algorithm need to follow and which are the minimum require hardware needed.
i am using pic18f4550 and xc compiler.

 

You will need and MP3 decoding chip since that microcontroller is not powerful enough to do it itself.

Bob

 

Or is it that you don't need to play MP3 files per se, but it is that you need to play digitally stored sound?

If that is what you need, have a look at the audio projects on
http://mondo-technology.com/

In particular I suggest his Voice Synthesizer and Speech EEPROM/EEPROM Voice System projects.

 

There are some readily availble modules that can read mp3 off storage media like SD cards and play them.

http://forum.arduino.cc/index.php?topic=117009.0

you just have to give them control signals for play, track selection, stop etc... i guess that would be the fastest and easiest way to get to the solution you are looking for.