Abstract:

Orthophony is the art of recording an acoustical sound field from a room and the reproduction of it by means of loudspeakers. For the reproduction of the signals, the simplest method is to use a transference matrix with the signals. The problem of the matrices is the sizes that they have, because they usually present dimensions too difficult to transmit or/and store. A way to solve the problem is using bit-rate reduction. Based on orthophony signals recorded in the studio of the institute of KW (Kommunikationswissenschaft) of the Technical University in Berlin and their corresponding matrices, experiments were accomplished for the reduction using MATLAB since it facilitates especially the use of matrices. The behavior of the different methods with different signal types (for example, speech, music, and noise) was observed and analyzed. The results are presented in this work. [This work was supported by Professor M. Krause, Institute of KW. Tech. Univ. of Berlin, Germany.]