Mp3 Decoder

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VB

MP3

I want to know the logic on which the mp3 file can be converted to wave file(i.e the decoding logic used) Without using any codec can we simply convert the mp3 samples to wave samples??
I can extract the samples from mp3 file by using snapshot of following code that I have provided.But I dont know the logic to decode these samples to wave samples.

THIS IS ONLY A SMALL PORTION OF MY CODE ONLY FOR EXTRACTING THE ID3V1 TAG DATA

imports system.io
'THIS CODE IS FOR ONLY READING THE TAG SECTION SIMILARLY I HAVE ALSO EXTRACTED THE HEADER OF THE MP3 FRAME AND DATA STORED
        Dim mp As FileStream
        Dim Title(30) As Byte
        Dim Artist(30) As Byte
        Dim Album(30) As Byte
        Dim Year(4) As Byte
        Dim Comments(30) As Byte
        mp = New FileStream("File_name.mp3", FileMode.Open)
        mp.Seek(-125, SeekOrigin.End)
        mp.Read(Title, 0, 30)
        mp.Seek(-95, SeekOrigin.End)
        mp.Read(Artist, 0, 30)
        mp.Seek(-65, SeekOrigin.End)
        mp.Read(Album, 0, 30)
        mp.Seek(-35, SeekOrigin.End)
        mp.Read(Year, 0, 4)
        mp.Seek(-31, SeekOrigin.End)
        mp.Read(Comments, 0, 30)
        Dim TxtTitle As String = System.Text.Encoding.ASCII.GetString(Title)
        Dim TxtArtist As String = System.Text.Encoding.ASCII.GetString(Artist)
        Dim TxtAlbum As String = System.Text.Encoding.ASCII.GetString(Album)
        Dim TextComments As String = System.Text.Encoding.ASCII.GetString(Comments)