BLOCK FLOATING POINT COMPRESSION WITH EXPONENT TOKEN CODES,申请号US201213661430-传众专利搜索

BLOCK FLOATING POINT COMPRESSION WITH EXPONENT TOKEN CODES

申请公布号：US2013060827(A1)

申请号：US201213661430

申请日期：2012.10.26

申请公布日期：2013.03.07

申请人：

WEGENER ALBERT W.

发明人：WEGENER ALBERT W.

分类号：G06F7/00

主分类号：G06F7/00

摘要：A method and apparatus for compressing signal samples uses block floating point representations where the number of bits per mantissa is determined by the maximum magnitude sample in the group. The compressor defines groups of signal samples having a fixed number of samples per group. The maximum magnitude sample in the group determines an exponent value corresponding to the number of bits for representing the maximum sample value. The exponent values are encoded to form exponent tokens. Exponent differences between consecutive exponent values may be encoded individually or jointly. The samples in the group are mapped to corresponding mantissas, each mantissa having a number of bits based on the exponent value. Removing LSBs depending on the exponent value produces mantissas having fewer bits. Feedback control monitors the compressed bit rate and/or a quality metric. This abstract does not limit the scope of the invention as described in the claims.