MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was...
45 KB (2,747 words) - 16:43, 5 October 2024
published in 1999. The MPEG-4 Part 3 consists of a variety of audio coding technologies – from lossy speech coding (HVXC, CELP), general audio coding...
38 KB (2,979 words) - 07:56, 11 September 2024
Algebraic code-excited linear prediction (redirect from Algebraic CELP)
EFR, AMR-WB (G.722.2), VMR-WB, EVRC, EVRC-B, SMV, TETRA, PCS 1900, MPEG-4 CELP and ITU-T G-series standards G.729, G.729.1 (first coding stage) and...
4 KB (450 words) - 20:01, 18 June 2023
Code-excited linear prediction (redirect from CELP)
used in MPEG-4 Audio speech coding. CELP is commonly used as a generic term for a class of algorithms and not for a particular codec. The CELP algorithm...
7 KB (920 words) - 21:26, 25 April 2024
MP4 file format (redirect from MPEG-4 Layer 14)
MPEG-4 Part 14, or MP4, is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data...
21 KB (1,903 words) - 18:54, 20 October 2024
MP3 (redirect from MPEG Layer III)
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany...
108 KB (11,590 words) - 15:23, 27 October 2024
Advanced Audio Coding (redirect from MPEG-4 AAC)
includes most of the MPEG-4 Audio Object Types), Scalable (AAC LC, AAC LTP, CELP, HVXC, TwinVQ, Wavetable Synthesis, TTSI), Speech (CELP, HVXC, TTSI) and...
65 KB (7,202 words) - 18:15, 12 November 2024
Harmonic Vector Excitation Coding (category MPEG-4)
algorithm specified in MPEG-4 Part 3 (MPEG-4 Audio) standard for very low bit rate speech coding. HVXC supports bit rates of 2 and 4 kbit/s in the fixed...
6 KB (721 words) - 22:04, 25 April 2024
List of codecs (section Generation 3/4)
by Skype) CELT (developed by Xiph.Org Foundation) libcelt MPEG-4 Audio MPEG-4 CELP MPEG-4 HVXC Skyphone MPLP Inmarsat INMARSAT-M IMBE Inmarsat Mini-M...
49 KB (5,237 words) - 08:29, 4 November 2024
oversampling. MPEG-4 CELP which is a parametric coder suited for voice only (vocoder) but that is robust to errors and needs a small bit rate. MPEG-4 HVXC which...
25 KB (2,998 words) - 11:25, 4 November 2024
RFC 3640, RTP Payload Format for Transport of MPEG-4 Elementary Streams RFC 6416, RTP Payload Format for MPEG-4 Audio/Visual Streams RFC 2250, RTP Payload...
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prediction (CELP) Algebraic code-excited linear prediction (ACELP) Relaxed code-excited linear prediction (RCELP) Low-delay CELP (LD-CELP) Adaptive Multi-Rate...
26 KB (3,270 words) - 10:20, 2 November 2024
"MPEG-2 Patent List" (PDF). MPEG LA. Archived (PDF) from the original on 2019-05-29. Retrieved 7 July 2019. "MPEG-4 Visual - Patent List" (PDF). MPEG LA...
68 KB (7,525 words) - 11:05, 1 November 2024
compression format, introduced in 1993. Code-excited linear prediction (CELP) was developed by Schroeder and Atal in 1985. LPC is the basis for voice-over-IP...
15 KB (1,678 words) - 16:52, 17 September 2024
prediction (CELP) Algebraic code-excited linear prediction (ACELP) Relaxed code-excited linear prediction (RCELP) Low-delay CELP (LD-CELP) Adaptive Multi-Rate...
20 KB (1,822 words) - 08:55, 12 November 2024
g. those defined in MPEG standards, as the low decoding complexity of vector quantization has become less relevant. AMR-WB+ CELP CELT (now part of Opus)...
13 KB (1,649 words) - 10:50, 3 February 2024
LPC-based code-excited linear prediction (CELP) coding, which is used for example in the GSM standard. In CELP, the modeling is divided in two stages, a...
16 KB (1,760 words) - 21:16, 30 October 2024
14_4: IS-54 VSELP (RealAudio 1) 28_8: G.728 LD-CELP (RealAudio 2) dnet: Dolby AC3 (RealAudio 3) sipr: Sipro Lab Telecom ACELP-NET (RealAudio 4/5) cook:...
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including digital images (such as JPEG and HEIF), digital video (such as MPEG and H.26x), digital audio (such as Dolby Digital, MP3 and AAC), digital television...
101 KB (11,989 words) - 07:39, 17 October 2024
Retrieved 2012-12-11 MPEG 2 AAC was limited to a 96 kHz sampling rate, however, with MPEG 4 AAC, a later version part of the MPEG 4 specification, the maximum...
69 KB (1,415 words) - 16:24, 2 October 2024
the most widely used speech coding method. Code-excited linear prediction (CELP), a type of LPC algorithm, was developed by Manfred R. Schroeder and Bishnu...
84 KB (9,926 words) - 02:15, 31 October 2024
some are discontinued). DRM's system uses the MPEG-4 based standard aacPlus to code the music and CELP or HVXC for speech programs. At present these are...
31 KB (3,914 words) - 19:59, 30 August 2024
Opus (audio format) (section 1.4)
modified discrete cosine transform (MDCT) that most music codecs use, using CELP techniques in the frequency domain for better prediction, while SILK uses...
73 KB (6,849 words) - 21:53, 16 September 2024
available for WAV files including LPCM, ADPCM, Microsoft GSM 06.10, CELP, SBC, Truespeech and MPEG Layer-3. These are the default ACM codecs that come with Windows...
24 KB (2,511 words) - 22:34, 11 November 2024
ear, followed in the early 1980s with the code-excited linear prediction (CELP) algorithm. Discrete cosine transform (DCT) coding, a lossy compression method...
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72 kbit/s ? 4.5–5 kHz (hybrid mode), 9–10 kHz, 18-20 kHz 510-1610 kHz (Europe), 510–1710 kHz (USA and Canada), SW, LW MPEG-4 HE-AAC/CELP/HVXC Yes, via...
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64 kbit/s basic data rate. including audio codecs such as G.711 (PCM) and G.728 (CELP), and discrete cosine transform (DCT) video codecs such as H.261 and H.263...
50 KB (6,322 words) - 06:59, 4 October 2024