AAC-LD
E818769
AAC-LD is a low-delay variant of the Advanced Audio Coding format designed for high-quality, real-time audio communication such as video conferencing and interactive broadcasting.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Advanced Audio Coding profile
ⓘ
audio codec ⓘ low-delay audio coding format ⓘ |
| abbreviationOf | Advanced Audio Coding Low Delay NERFINISHED ⓘ |
| audioBandwidth | up to 20 kHz depending on configuration ⓘ |
| basedOn | AAC NERFINISHED ⓘ |
| belongsToCategory |
MPEG audio codecs
NERFINISHED
ⓘ
real-time communication codecs ⓘ |
| bitrateRange | typically from low to medium bitrates suitable for communication links ⓘ |
| comparedTo | AAC-LC NERFINISHED ⓘ |
| compressionDomain | time-frequency domain ⓘ |
| compressionType | perceptual transform coding ⓘ |
| designGoal |
enable natural interactive conversations
ⓘ
maintain high subjective audio quality ⓘ minimize end-to-end latency ⓘ |
| differenceFrom | AAC-LC has higher coding delay ⓘ |
| feature |
backward compatibility with AAC tools
ⓘ
high audio quality at low delay ⓘ lossy compression ⓘ low algorithmic delay ⓘ perceptual audio coding ⓘ support for full-band audio ⓘ |
| fullName | Advanced Audio Coding Low Delay NERFINISHED ⓘ |
| optimizedFor | two-way interactive communication ⓘ |
| partOfFamily | MPEG-4 AAC NERFINISHED ⓘ |
| relatedTo |
AAC-ELD
NERFINISHED
ⓘ
AAC-LC NERFINISHED ⓘ HE-AAC ⓘ |
| standardizedBy | ISO/IEC NERFINISHED ⓘ |
| standardNumber | ISO/IEC 14496-3 NERFINISHED ⓘ |
| supports |
mono audio
ⓘ
multichannel audio ⓘ stereo audio ⓘ |
| supportsSamplingRates | up to 48 kHz GENERATED ⓘ |
| targetUse |
VoIP
ⓘ
interactive broadcasting ⓘ real-time audio communication ⓘ telepresence systems ⓘ video conferencing ⓘ |
| typicalDelay | around 20 ms to 40 ms algorithmic delay ⓘ |
| usedIn |
IP-based audio links
ⓘ
broadcast contribution links ⓘ professional conferencing systems ⓘ |
| uses |
modified discrete cosine transform
ⓘ
prediction tools adapted for low delay ⓘ psychoacoustic model ⓘ temporal noise shaping ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.