Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Patent
1996-06-11
1998-12-08
Hoff, Marc S.
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
341 50, H03M 700
Patent
active
058476660
ABSTRACT:
This invention provides a code generator for reduction of the power consumption of digital signal processors. A plurality of codes are prepared for an item of data. A code with the lowest polarity-inverting bit count for input data, is selected from among the prepared codes. The code generator of the present invention has a code generation section, a code selection section and a code output section. The code generation section inputs data from a data file and generates all codes allocated to the input data. The code selection section makes a comparison between each of the generated codes and a code that is transferred just before or after any one of the generated codes is transferred over a bus of the digital signal processor, in order to select from among the generated codes a code having the lowest polarity-inverting bit count. The code output section writes the selected code into a code file. In addition, the code output section temporarily holds the selected code and outputs it to the code selection section as a comparison target code used to select the next code.
REFERENCES:
patent: 5572736 (1996-11-01), Curran
patent: 5574921 (1996-11-01), Curran
Ueda Katsuhiko
Yasoshima Hiroyuki
Hoff Marc S.
Matsushita Electric - Industrial Co., Ltd.
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