The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2007
Filed:
Jun. 21, 2004
Takehiro Moriya, Nerima-ku, JP;
Dai Yang, San Diego, CA (US);
Takehiro Moriya, Nerima-ku, JP;
Dai Yang, San Diego, CA (US);
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
Signal samples X in a floating-point format, each of which is composed of 1 bit of sign S, 8 bits of exponent E and 23 bits of mantissa M, are converted through truncation by an integer formatting partinto signal samples Y in a 24-bit integer format, the integer-value signal samples Y are coded by a compressing partinto a code sequence Ca, and the code sequence Ca is output. According to the number of digits n following the most significant '1' in the integer-value signal sample Y, a difference producing partextracts the least significant (23−n) bits from the mantissa M of the input signal sample X to form a difference signal Z, and a compressing partperforms entropy coding of the difference signal Z to produce a code sequence Cb and outputs the code sequence Cb. Alternatively, the difference signal Z may be output as it is, rather than being compressed.