METHOD FOR COMPACTION AND DECOMPACTION OF SPEECH MESSAGES Russian patent published in 2005 - IPC

FIELD: electric communication, namely systems for data transmitting by means of digital communication lines.

SUBSTANCE: method comprises steps of preliminarily, at reception and transmission forming R matrices of allowed vectors, each matrix has dimension m2 x m1 of unit and zero elements; then from unidimensional analog speech signal forming initial matrix of N x N elements; converting received matrix to digital one; forming rectangular matrices with dimensions N x m and m x N being digital representation of initial matrix from elements of lines of permitted vectors; transmitting elements of those rectangular matrices through digital communication circuit; correcting errors at transmission side on base of testing matching of element groups of received rectangular matrices to line elements of preliminarily formed matrices of permitted vectors; then performing inverse operations for decompacting speech messages. Method is especially suitable for telephone calls by means of digital communication systems at rate 6 - 16 k bit/s.

EFFECT: possibility for correcting errors occurred in transmitted digital trains by action of unstable parameters of communication systems and realizing telephone calls by means of low-speed digital communication lines.

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