diff options
Diffstat (limited to 'libAACenc/include/aacenc_lib.h')
| -rw-r--r-- | libAACenc/include/aacenc_lib.h | 95 |
1 files changed, 2 insertions, 93 deletions
diff --git a/libAACenc/include/aacenc_lib.h b/libAACenc/include/aacenc_lib.h index 4635119..862dcb5 100644 --- a/libAACenc/include/aacenc_lib.h +++ b/libAACenc/include/aacenc_lib.h @@ -424,102 +424,11 @@ For HE-AAC and HE-AAC v2 the lowest possible audio input sampling frequency is 1 AAC-LC core encoder operates in dual rate mode at its lowest possible sampling frequency, which is 8 kHz. HE-AAC v2 requires stereo input audio data. -The following table lists the supported bitrates for AAC-LC, HE-AAC and HE-AAC v2 encoding depending -on input sampling frequency ("Hz") and number of input channels ("chan"). The minimum and maximum -allowed bitrate ("BR Min", "BR Max") is given in bits per second. -In case the desired combination of bitrate and sampling frequency is not available ("NA") for HE-AAC or -HE-AAC v2 then the encoder will automatically switch to AAC-LC and give a command line warning. Please note that in HE-AAC or HE-AAC v2 mode the encoder supports much higher bitrates than are appropriate for HE-AAC or HE-AAC v2. For example, at a bitrate of more than 64 kbit/s for a stereo audio signal at 44.1 kHz it usually makes sense to use AAC-LC, which will produce better audio quality at that bitrate than HE-AAC or HE-AAC v2. - -\verbatim - Config AAC-LC HE-AAC (SBR) HE-AACv2 (SBR+PS) - - Hz chan BR Min BR Max BR Min BR Max BR Min BR Max - -8000 1 758 48000 NA NA NA NA -11025 1 1045 66150 NA NA NA NA -12000 1 1137 72000 NA NA NA NA -16000 1 1516 96000 8000 48000 NA NA -22050 1 2089 132300 8000 64000 NA NA -24000 1 2274 144000 8000 64000 NA NA -32000 1 3032 192000 8000 64000 NA NA -44100 1 4178 264576 8000 64000 NA NA -48000 1 4547 288000 12000 64000 NA NA -64000 1 6063 384000 24000 160000 NA NA -88200 1 8355 529200 24000 160000 NA NA -96000 1 9094 576000 24000 160000 NA NA ------------------------------------------------------------------------------------ -8000 2 1071 96000 NA NA NA NA -11025 2 1476 132300 NA NA NA NA -12000 2 1606 144000 NA NA NA NA -16000 2 2141 192000 16000 96000 8000 48000 -22050 2 2951 264600 16000 128000 8000 64000 -24000 2 3211 288000 16000 128000 8000 64000 -32000 2 4282 384000 16000 128000 8000 64000 -44100 2 5900 529152 16000 128000 8000 64000 -48000 2 6422 576000 16000 128000 12000 64000 -64000 2 8563 768000 32000 256000 24000 160000 -88200 2 11801 1058400 32000 256000 24000 160000 -96000 2 12844 1152000 32000 256000 24000 160000 ------------------------------------------------------------------------------------ -8000 3 1383 144000 NA NA NA NA -11025 3 1906 198450 NA NA NA NA -12000 3 2075 216000 NA NA NA NA -16000 3 2766 288000 26667 120000 NA NA -22050 3 3812 396900 26667 160000 NA NA -24000 3 4149 432000 26667 160000 NA NA -32000 3 5532 576000 26667 160000 NA NA -44100 3 7623 793728 26667 160000 NA NA -48000 3 8297 864000 29996 160000 NA NA -64000 3 11063 1152000 59996 400000 NA NA -88200 3 15246 1587600 59996 400000 NA NA -96000 3 16594 1728000 59996 400000 NA NA ------------------------------------------------------------------------------------ -8000 4 1696 192000 NA NA NA NA -11025 4 2337 264600 NA NA NA NA -12000 4 2543 288000 NA NA NA NA -16000 4 3391 384000 40000 160000 NA NA -22050 4 4673 529200 40000 213330 NA NA -24000 4 5086 576000 40000 213330 NA NA -32000 4 6782 768000 40000 213330 NA NA -44100 4 9345 1058304 40000 213330 NA NA -48000 4 10172 1152000 40000 213330 NA NA -64000 4 13563 1536000 80000 533330 NA NA -88200 4 18691 2116800 80000 533330 NA NA -96000 4 20344 2304000 80000 533330 NA NA ------------------------------------------------------------------------------------ -8000 5 2008 240000 NA NA NA NA -11025 5 2768 330750 NA NA NA NA -12000 5 3012 360000 NA NA NA NA -16000 5 4016 480000 43244 184612 NA NA -22050 5 5535 661500 43244 246152 NA NA -24000 5 6024 720000 43244 246152 NA NA -32000 5 8032 960000 43244 246152 NA NA -44100 5 11068 1322880 43244 246152 NA NA -48000 5 12047 1440000 46140 246152 NA NA -64000 5 16063 1920000 92296 615384 NA NA -88200 5 22137 2646000 92296 615384 NA NA -96000 5 24094 2880000 92296 615384 NA NA ------------------------------------------------------------------------------------ -8000 5.1 2321 240000 NA NA NA NA -11025 5.1 3198 330750 NA NA NA NA -12000 5.1 3481 360000 NA NA NA NA -16000 5.1 4641 480000 45715 199990 NA NA -22050 5.1 6396 661500 45715 266658 NA NA -24000 5.1 6961 720000 45715 266658 NA NA -32000 5.1 9282 960000 45715 266658 NA NA -44100 5.1 12790 1322880 45715 266658 NA NA -48000 5.1 13922 1440000 49982 266658 NA NA -64000 5.1 18563 1920000 99982 666658 NA NA -88200 5.1 25582 2646000 99982 666658 NA NA -96000 5.1 27844 2880000 99982 666658 NA NA - -\endverbatim \n - \section reommendedConfig Recommended Sampling Rate and Bitrate Combinations The following table provides an overview of recommended encoder configuration parameters @@ -956,8 +865,8 @@ typedef enum AACENC_GRANULE_LENGTH = 0x0105, /*!< Core encoder (AAC) audio frame length in samples: - 1024: Default configuration. - - 512: Optional length in LD/ELD configuration. - - 480: Default LD/ELD configuration. */ + - 512: Default LD/ELD configuration. + - 480: Optional length in LD/ELD configuration. */ AACENC_CHANNELMODE = 0x0106, /*!< Set explicit channel mode. Channel mode must match with number of input channels. - 1-6: MPEG channel modes supported, see ::CHANNEL_MODE in FDK_audio.h. */ |