Its objective is highquality mono, stereo, and multichannel coding at medium and high bitrates, so the lower-rate USAC coding tools (ACELP, TCX, Enhanced SBRand MPEG Surround with Unified Stereo coding) won't be integrated.看起来目前只支持中高码率, 还不支持低码率(VBR mode 1(lowest) result...
Extended High-Efficiency AAC (xHE-AAC) is an MPEG profile of USAC (Unified speech and audio coding) defined in ISO/IEC 23003-3. xHE-AAC contains all of the tools of the High Efficiency AAC v2 Profile and as such capable of decoding all AAC family profile streams. MPEG USAC standard em...
xHE-AAC结合了两项MPEG技术:High Efficiency AAC v2和USAC (Unified Speech and Audio Coding)。该项技术旨在支持混合语音和各种音频内容的传输,其中包括移动设备上的音乐、无线电广播以及在线流媒体服务。xHE-AAC能够在低比特率下带来卓越的音频质量,并能够提供适用于移动设备的聆听体验。此外,它能够通过无缝带宽扩展...
震撼的xHE-AAC..64kbps之xHE-AAC非专业录音师听不出与CD音质之区别,16kbps的xHE-AAC音质与64kbps之HE-AAC音质相当,据说,最牛x的是其中的USAC技术
ff_aac_usac_reset_state(ac, &ac->oc[1]); }/** @@ -993,13 +996,14 @@ static int decode_eld_specific_config(AACDecContext *ac, AVCodecContext *avctx, */ static int decode_audio_specific_config_gb(AACDecContext *ac, AVCodecContext *avctx,...