发明名称 |
Method and apparatus for signal compression and processing using logarithmic differential compression |
摘要 |
For most 'natural' signals like audio and video, the first derivative with respect to time (or spatially as in video) can have a significant amount of error and still be perceived as accurate due to the masking properties of the ears and eyes. A Logarithmic Differential Compression (LDC) data stream representation of the first derivative is formed with four or less bits of mantissa and can be treated as both a logarithmic numeric representation and a floating point numeric representation without correction. A digital signal processor 524 is described which performs multiplication of LDC data with a simple scalar adder 600 and addition of LDC data with a simple four or less bit floating point adder 610. A digital signal processor is optimized to process LDC data and low cost arrays of these digital signal processors are formed to provide high performance systems for transforms and filtering.
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申请公布号 |
US5933360(A) |
申请公布日期 |
1999.08.03 |
申请号 |
US19960715534 |
申请日期 |
1996.09.18 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
LARSON, KEITH E. |
分类号 |
G06F7/57;(IPC1-7):G06F7/38 |
主分类号 |
G06F7/57 |
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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