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Adaptive Multi-Rate Wideband audio (ITU-T G.722.2) RFC 4867 dynamic (or profile) AMR-WB+ audio 1, 2 or omit 72000 13.3–40 Extended Adaptive Multi Rate – WideBand audio RFC 4352 dynamic (or profile) vorbis audio (various) (various) Vorbis audio RFC 5215 dynamic (or profile) opus audio 1, 2 48000 [note 3] 2.5–60 20 Opus audio RFC 7587
The DVD format uses the 48 kHz sampling rate, and its doublings. In digital audio, 48,000 Hz (also represented as 48 kHz or DVD Quality) is a common sampling rate. It has become the standard for professional audio and video. 48 kHz is evenly divisible by 24, a common frame rate for media, such as film, unlike 44.1 kHz. [i]
48,000 Sony PlayStation 2 and early PlayStation 3 consoles ADPCM, Dual-core sound unit, Supports Dolby Digital (AC-3), DTS; emulated on PS3 for backwards compatible PS1/PS2 games [141] [142] Yamaha: Yamaha Y8950 (a.k.a. MSX-AUDIO) 1984 1 8 ~50,000 MSX-Audio cartridges for MSX: ADPCM, Speech synthesis chip [66] [63] Yamaha YM2608 (a.k.a. OPNA ...
The Adaptive Multi-Rate (AMR, AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR is a multi-rate narrowband speech codec that encodes narrowband (200–3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality [ 3 ] speech starting at 7.4 kbit/s.
Audio on Compact Disc has a sampling rate of 44.1 kHz; to transfer it to a digital medium that uses 48 kHz, method 1 above can be used with L = 160, M = 147 (since 48000/44100 = 160/147). [5] For the reverse conversion, the values of L and M are swapped. Per above, in both cases, the low-pass filter should be set to 22.05 kHz.
High-resolution audio (high-definition audio or HD audio) is a term for audio files with greater than 44.1 kHz sample rate or higher than 16-bit audio bit depth. It commonly refers to 96 or 192 kHz sample rates. However, 44.1 kHz/24-bit, 48 kHz/24-bit and 88.2 kHz/24-bit recordings also exist that are labeled HD audio.
Advanced Audio Coding is designed to be the successor of the MPEG-1 Audio Layer 3, known as MP3 format, which was specified by ISO/IEC in 11172-3 (MPEG-1 Audio) and 13818-3 (MPEG-2 Audio). Improvements include: more sample rates (from 8 to 96 kHz) than MP3 (16 to 48 kHz);
Some digital audio was provided for domestic use in two incompatible EIAJ formats, corresponding to 525/59.94 (44,056 Hz sampling) and 625/50 (44.1 kHz sampling). The Digital Audio Tape (DAT) format was released in 1987 with 48 kHz sampling. This sample rate has become the standard rate for professional audio. [2]