Patent ID: 6198940
Filing Date: 2001-03-06
Classification: H03M

Abstract:
A mobile radiophone apparatus including an A/D converter for outputting an input analogue voice signal as quantized data and a highly efficient voice encoder for extracting features of the quantized data output at said A/D converter and converting the data to codes of a smaller data quantity by a fixed time unit to output the codes, whereinthe number of quantization bits in said A/D converter is established to be larger than the number of quantization bits possible to be input to said highly efficient voice encoder and a bit-number converter is provided for converting the number of bits of the quantized data output at said A/D converter to the number of quantization bits possible to be input to said highly efficient voice encoder corresponding to a maximum amplitude value within the fixed time unit to output the converted data to said highly efficient voice encoder and the conversion parameter for the quantized data in said bit-number converter is transmitted in addition to the codes output at said highly efficient voice encoder.