Patents Examined by Kai Nguyen
  • Patent number: 7126501
    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 part 12 into digital signal samples Y in an integer format, the sequence of the digital signal samples Y is losslessly compression-coded by a compressing part 13 into a code sequence Ca, and the code sequence Ca is output. The digital signal samples Y are converted by a floating point formatting part 15 into digital signal samples X? in the floating-point format, a difference signal ?X indicating the difference between the digital signal sample X? and the digital signal sample X is determined by a subtraction part 16, the difference signal ?X is losslessly coded, and the resulting code sequence Cb is output.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: October 24, 2006
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takehiro Moriya, Dai Yang, Akio Jin, Kazunaga Ikeda