g723_stat.asm

利用G.723协议在DSP实现音频信号的压缩与解压缩实验

            .title "g723_stat.asm"
;//struct g723_state {
;//    long  yl;	/* Locked or steady state step size multiplier. */
;//    short yu;	/* Unlocked or non-steady state step size multiplier. */
;//    short dms;	/* Short term energy estimate. */
;//	short dml;	/* Long term energy estimate. */
;//	short ap;	/* Linear weighting coefficient of 'yl' and 'yu'. */
;//
;//	short a[2];	/* Coefficients of pole portion of prediction filter. */
;//	short b[6];	/* Coefficients of zero portion of prediction filter. */
;//	short pk[2];	/*
;//			 * Signs of previous two samples of a partially
;//			 * reconstructed signal.
;//			 */
;//	short dq[6];	/*
;//			 * Previous 6 samples of the quantized difference
;//			 * signal represented in an internal floating point
;//			 * format.
;//			 */
;//	short sr[2];	/*
;//			 * Previous 2 samples of the quantized difference
;//			 * signal represented in an internal floating point
;//			 * format.
;//			 */
;//	char td;	/* delayed tone detect, new in 1988 version */
;//}

yl         .set        0
yu         .set        yl+2
dms        .set       yu+1
dml        .set       dms+1 
ap         .set       dml+1
a          .set       ap+1
b          .set       a+2
pk         .set       b+6
dq         .set       pk+2
sr         .set       dq+6  
td         .set       sr+2