发明名称 |
Method and system for decoding a digital signal using a variable frequency low-pass filter |
摘要 |
In a data compression system, a digital signal comprising a series of digital samples and a sampling datum indicating the sampling interval of the digital samples are written into a read-write memory (M2). The digital samples and the associated sampling datum are read out of the memory into first and second digital-to-analog converters (DAC1, DAC2), respectively. The output of the first digital-to-analog converter is applied to a variable frequency low-pass filter (5) to remove the components having frequencies higher than a presettable frequency limit value which is variable as a function of the output of the second digital-to-analog converter so that the cut-off frequency is lower than one-half the sampling frequency to eliminate quantum noise.
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申请公布号 |
US4673916(A) |
申请公布日期 |
1987.06.16 |
申请号 |
US19830475404 |
申请日期 |
1983.03.15 |
申请人 |
VICTOR COMPANY OF JAPAN, LIMITED |
发明人 |
KITAMURA, MASATSUGU;TANAKA, MITSUAKI;TAKEKURA, HIROYUKI |
分类号 |
H03M1/12;G10L19/00;G11B20/10;H03M1/00;H04B14/04;H04M1/65;(IPC1-7):H03K13/02 |
主分类号 |
H03M1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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