Apparatus and method for data compression.

DESCRIBES AN APPARATUS FOR THE COMPRESSION OF THE DIGITAL INPUT SIGNAL, AND SUPPLY A COMPRESSED DIGITAL OUTPUT SIGNAL, WHICH INCLUDES MEANS (11-15) FOR THE DERIVATION OF PLURAL SPECTRUM COEFFICIENTS, FROM THE DIGITAL INPUT OF THE SPECTRAL COEFFICIENTS IN BANDS, AND MEANS (16,18) OF ADATIVE BIT LOCATION FOR THE ADACTIVE LOCATION OF A NUMBER OF QUANTIZATION BITS DEPENDING ON THE SIGNAL ALONG THE BANDS FOR THE LOCATION OF EACH BAND ACCORDING TO A NUMBER OF DEPENDENT QUANTIZATION BITS FOR THE QUANTIZATION PROCESS OF EACH SPECTRAL COEFFICIENT IN THE BAND, THE NUMBER OF SIGNAL DEPENDENT QUANTIZATION BITS LOCATED TO EACH BAND THAT ARE DETERMINED IN ACCORDANCE WITH THE MAGNITUDE OF BAND, HEAVY DEPENDENT ON THE FREQUENCY BAND.