Coded data generation or conversion – Digital code to digital code converters
Reexamination Certificate
2006-10-24
2006-10-24
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
C341S051000, C704S212000, C704S500000, C704S501000, C704S503000, C704S504000
Reexamination Certificate
active
07126501
ABSTRACT:
Digital signal samples X in a floating-point format, each of which is composed of 1 bit of sign, 8 bits of exponent E and 23 bits of mantissa M, are converted through rounding by an integer formatting part12into digital signal samples Y in an integer format, the sequence of the digital signal samples Y is losslessly compression-coded by a compressing part13into a code sequence Ca, and the code sequence Ca is output. The digital signal samples Y are converted by a floating point formatting part15into digital signal samples X′ in the floating-point format, a difference signal ΔX indicating the difference between the digital signal sample X′ and the digital signal sample X is determined by a subtraction part16, the difference signal ΔX is losslessly coded, and the resulting code sequence Cb is output.
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Ikeda Kazunaga
Jin Akio
Moriya Takehiro
Yang Dai
Barnie Rexford
Nguyen Kai
Nippon Telegraph and Telephone Corporation
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