diff options
Diffstat (limited to 'libavcodec/qcelpdata.h')
| -rw-r--r-- | libavcodec/qcelpdata.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/qcelpdata.h b/libavcodec/qcelpdata.h index 0ab0be1c9f..1c9fad002d 100644 --- a/libavcodec/qcelpdata.h +++ b/libavcodec/qcelpdata.h @@ -550,4 +550,13 @@ static const double qcelp_rnd_fir_coefs[11] = { */ #define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32 +/** + * initial coefficient to perform bandwidth expansion on LPC + * + * @note: 0.9883 looks like an approximation of 253/256. + * + * TIA/EIA/IS-733 2.4.3.3.6 6 + */ +#define QCELP_BANDWITH_EXPANSION_COEFF 0.9883 + #endif /* AVCODEC_QCELPDATA_H */ |