Method for searching codebook
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United States of America Patent
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Aug 22, 2006
Grant Date -
Apr 24, 2003
app pub date -
Oct 23, 2002
filing date -
Oct 23, 2001
priority date (Note) -
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Abstract
A method for searching a codebook which predicts a residual element of an input voice signal includes combining each track of the input signal, forming track units including at least two tracks, and determining a pulse code for each track. The method further includes calculating energy for each track using an energy formula including a vector dot product, arranging or selecting codewords in a small track energy order, and searching or selecting an optimal pulse for a single- or double-pulse track of the selected codeword.
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