| 摘要 |
PROBLEM TO BE SOLVED: To restrain a noise, even when wrong data are generated in a digital voice communication device. SOLUTION: A data receiving part 102 divides a received data 110 into ADPCM frame data and outputs the ADPCM frame data, together with frame error information 114 regarding error of each ADPCM frame data, to a G.726 decoder 106. The G.726 decoder 106 conducts decoding, defined in the G.726 of the ITU-T recommendation to convert the ADPCM frame data 112 into PCM system of data and outputs the data to aμ-law error correction processing part 12. Theμ-law error correction processing part 12 outputs the input frame data to a G.711 decoder 108, as they are, when there is no error included in the frame data, and sets a substitution range, based on the maximum value and the minimum value of the normal frame data immediately in front of the frame data, when an error is included in the frame data, and substitutes the wrong frame data with data within the substitution range. COPYRIGHT: (C)2009,JPO&INPIT
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