Circuit for providing a widened stereo image

A circuit arrangement for improving the stereo image separation in a stereo signal comprising:

• a first and a second input for receiving, respectively, a left and a right channel signal of an input stereo signal;
• a summing and equalizing circuit having a first and a second input coupled, respectively, to said first and second inputs of said circuit arrangement, for receiving said left and right channel signals, means for summing the left and right channel signals thereby forming a sum signal, means for equalizing said sum signal, and a first and a second output for supplying the equalized sum signal;
• a difference and equalizing circuit having a first and a second input coupled, respectively, to said first and second inputs of said circuit arrangement, for receiving said left and right channel signals, means for subtracting the right channel signal from the left channel signal forming a difference signal, means for performing and equalization on said difference signal, said equalization having characteristics of an ear of a human being, means for processing said difference signal in order to effectively cancel crosstalk effects of the left channel signal reaching the right channel output and the right channel signal reaching the left channel output, and first and second outputs for providing, respectively, the equalized difference signal;
• first means for combining the first output of said summing and frequency equalizing circuit with the first output of said difference and frequency equalizing circuit to form a modified left channel output signal;
• second means for combining the second output of said summing and frequency equalizing circuit with the second output of said difference and frequency equalizing circuit to form a modified right channel output signal;
• and
• first and second outputs for providing said modified left and right channel output signals, respectively.