Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1996-08-29
1998-09-22
MacDonald, Allen R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704230, 704219, 704500, 704501, G10L 914, G10L 916
Patent
active
058129820
ABSTRACT:
Digital data divided into blocks each having a predetermined number of samples is transformed into data on a frequency axis for each block to generate coefficient data for each frequency. Coefficient data of a predetermined number of blocks are stored in a buffer. From the buffer, coefficient data are inputted to a floating-point transforming circuit for each one block. The coefficient data are divided into a plurality of sub-bands, each sub-band including one or a plurality of coefficient data. The coefficient data are floating-point transformed for each sub-band and transformed into one sub-band common characteristic data which is common to the coefficient data included in each sub-band and mantissa data of the number equal to the number of coefficient data included in each sub-band. The sub-band common characteristic data and the mantissa data are stored in a memory. Sub-band common characteristic data of a predetermined number of blocks are read from the memory for each sub-band. One block-common characteristic data which is common to the read sub-band common characteristic data is generated. Coefficient data of a predetermined number of blocks are read from the memory for each sub-band. The read coefficient data is divided by an exponent expressed by the block-common characteristic data to generate new mantissa data.
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Collins Alphonso A.
MacDonald Allen R.
Nippon Steel Corporation
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