Coded data generation or conversion – Digital code to digital code converters – To or from packed format
Reexamination Certificate
2005-01-18
2005-01-18
Tokar, Michael (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from packed format
C341S061000, C341S050000, C341S055000
Reexamination Certificate
active
06844834
ABSTRACT:
The present invention provides a processor including a bit-shift circuit for inputting pieces of data held sequentially in a main register and an auxiliary register, shifting the piece of data bit after bit in accordance with a pointer and a bit count and outputting the shifted data by execution of an unpacking instruction specifying the bit count; a mask circuit for masking data output by the bit-shift circuit in accordance with the pointer and the bit count in the execution of the unpacking instruction; and a pointer-updating circuit for updating the value of the pointer by the bit count in the execution of the unpacking instruction.
REFERENCES:
patent: 4853888 (1989-08-01), Lata et al.
patent: 6133859 (2000-10-01), Deygas et al.
patent: 6144321 (2000-11-01), Deygas et al.
patent: 6388583 (2002-05-01), Long et al.
patent: 6404359 (2002-06-01), Sakai
Iwasaki Hiroshi
Maruya Satoshi
Frommer William S.
Frommer & Lawrence & Haug LLP
Mai Lam T.
Sony Corporation
Tokar Michael
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