What's New in 4.0

The Intel Signal Processing Library version 4.0 includes new DLLs and static libraries optimized for the Intel486^™ processor, the Pentium^® processor, the Pentium processor with MMX^™ technology, the Pentium Pro processor, and the Pentium II processor.

• New functions
  The DCT, Wavelet, Power Spectrum, Norm, and Normalize functions are new.
  These new functions are optimized to improve performance on all Intel Architecture processors, especially the Pentium Pro and Pentium II processors.

• Optimized for more processors
  Now optimized for the Pentium Pro and Pentium II processors.

• Improved accuracy of the integer filter API
  By using internally a 32-bit delay line and accepting floating point taps, the accuracy of the integer filter functions is significantly improved. This change affects the function prototypes of the IIR, FIR, and LMS filter functions. Please refer to the Intel Signal Processing Library Reference Manual for details.

  Release History
  Version 1.0 was the first public release of the Signal Processing Library. It was originally released to alpha sites in mid-March of 1995 and given general distribution on the IAL June 1995 CDROM. It consisted of a Pentium processor-optimized static library form of the functions.

  Version 2.0, released in September 1995, added processor-specific, dynamically linked libraries (DLLs). A DLL detects the processor type at the time the DLL is loaded and loads a processor-specific DLL that is optimized for either the Intel486 processor, the Pentium processor, or the Pentium Pro processor.

  Version 3.0, released in November 1996, added support for 16-bit integer data types, for the Pentium processor with MMX technology, and a custom DLL to minimize the memory footprint.