Q-Coder Function Index (Wavelet Library)

Wavelet Library

Functions

Q-Coder functions

#include <wv/pak_qcoder.h>

Q-Coder¹ is an adaptive binary arithmetic coder that uses a fixed-precision representation of the code string and a self-generating mechanism for adaptive symbol-probability estimation.

qEncode(): Encode a code string.
qDecode(): Decode a code string.
qCreateInputContext(): Define the input source.
qCreateOutputContext(): Define the output target.
qDestroyInputContext(): Free the memory used by an input context.
qDestroyOutputContext(): Free the memory used by an output context.

¹ Q-Coder is a patented algorithm developed by researchers at the IBM T. J. Watson Research Center in Yorktown Heights, New York, and the IBM Almaden Research Center in San Jose, California. For more information, see IBM J. Res. Develop. 32 (1988).

Last Updated: 19 August 1998