Device and method for optimizing stereophonic or pseudo-stereophonic audio signals

摘要

The invention permits optimum choice of those parameters which form the basis for the generation of stereophonic or pseudo-stereophonic signals. The user is provided with means for stipulating the degree of correlation, the definition range, the loudness and also further parameters of the resulting signals according to psychoacoustic aspects, and hence for preventing artifacts.;The invention can be used to define highly efficient encoders or decoders which confine audio signals intended for reproduction by two or more than two loudspeakers as a mono signal plus a few parameters.;Specific areas of application are telecommunications (hands-free devices), global networks, computer systems, broadcasting and transmission devices, particularly satellite transmission devices, professional audio technology, television, film and broadcasting and also electronic consumer goods.

主权项

1. A method for obtaining pseudo stereophonic output signals x(t) and y(t) comprising the step of:
generating the pseudo stereophonic output signals x(t) and y(t) from a mono signal on the basis of at least one parameter by generating an MS signal from the mono signal and converting the MS signal into the pseudo stereophonic output signals x(t) and y(t) using an MS matrix, wherein x(t) is the function value of the resulting left output channel at the time t, and y(t) is the function value of the resulting right output channel at the time t; determining a criterion of the generated pseudo stereophonic output signals x(t) and y(t); and iteratively optimizing the at least one parameter until the determined criterion is within a predetermined definition range.