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Patent Searching and Data


Title:
DATA CONVERSION DEVICE, PROGRAM AND METHOD
Document Type and Number:
Japanese Patent JP2009198834
Kind Code:
A
Abstract:

To reduce a rounding error by quantization as much as possible, when a data obtained by quantizing an analog signal is converted to the data with more bit numbers.

In a data conversion device including a data conversion means for sequentially converting a first data in which the analog signal is quantized with a first bit number, to a second data of a second bit number, the first data and the second data can take a first maximum value and a second maximum value, respectively. The data conversion means is composed of a first conversion means for converting the first data to the second data by adding 0 to a lower side of the first data, when a value of the first data is not the first maximum value (step 21 and 23), and a second conversion means for converting the first data to the second data so that the data according to a first data prior to or after the first data may be larger than the data of the second bit by adding 0 to the lower side of the first data, when the value of the first data is the first maximum value (step 21, 24 to 26).


Inventors:
NAKAMURA MASAMI
Application Number:
JP2008040699A
Publication Date:
September 03, 2009
Filing Date:
February 21, 2008
Export Citation:
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Assignee:
KENWOOD CORP
International Classes:
G10L19/00; G11B20/10
Domestic Patent References:
JP2000059222A2000-02-25
JP2007221569A2007-08-30
JPH0865106A1996-03-08
JP2000059222A2000-02-25
JP2007221569A2007-08-30
Foreign References:
WO2007069369A12007-06-21
WO1999060704A11999-11-25
WO2007069369A12007-06-21
Attorney, Agent or Firm:
Takashi Yamazaki