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Compact encoding of digital data
video use lossy video coding formats. Lossy compression is extensively used in video. In lossy audio compression, methods of psychoacoustics are used to remove
Data_compression
Topics referred to by the same term
Audio compression may refer to: Audio compression (data), a type of lossy or lossless compression in which the amount of data in a recorded waveform is
Audio_compression
Digitally coded format for audio signals
An audio coding format, or audio compression format, is an encoded format of digital audio, such as in digital television, digital radio and in audio and
Audio_coding_format
Audio signal processing operation
Dynamic range compression (DRC) or simply compression, is an audio signal processing operation that reduces the volume of loud sounds or amplifies quiet
Dynamic_range_compression
Computer format for digital audio
metadata) is called the audio coding format and can be uncompressed or compressed to reduce the file size, often using lossy compression. The data can be a
Audio_file_format
Data compression approach allowing perfect reconstruction of the original data
data compression technologies (e.g. lossless mid/side joint stereo preprocessing by MP3 encoders and other lossy audio encoders). Lossless compression is
Lossless_compression
Digital audio format
MPEG-1 Audio or MPEG-2 Audio encoded data. Concerning audio compression, which is its most apparent element to end-users, MP3 uses lossy compression to reduce
MP3
Type of data compression
data (audio, video, and images), especially in applications such as streaming media and internet telephony. By contrast, lossless compression is typically
Lossy_compression
Lossless predictive audio compression (LPAC) is an improved lossless audio compression algorithm developed by Tilman Liebchen, Marcus Purat and Peter Noll
Lossless predictive audio compression
Lossless_predictive_audio_compression
List of computer file compression formats
of compression formats and related codecs. Linear pulse-code modulation (LPCM, generally only described as PCM) is the format for uncompressed audio in
List_of_codecs
Lossy audio compression format
Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. It was developed by Dolby, AT&T, Fraunhofer and Sony, originally
Advanced_Audio_Coding
Open-source lossless audio codec
Monkey's Audio is an algorithm and file format for lossless audio data compression. Lossless data compression does not discard data during the process
Monkey's_Audio
File format family
of AIFF known as AIFF-C or AIFC, with various defined compression codecs. In addition to audio data, AIFF can include loop point data and the musical
Audio_Interchange_File_Format
Distortion of media caused by lossy data compression
In computing, a compression artifact (or artefact) is a noticeable distortion of digital media (including images, audio and video) caused by the application
Compression_artifact
Lossy audio compression format
MP2 (formally MPEG-1 Audio Layer II or MPEG-2 Audio Layer II, sometimes incorrectly called Musicam) is a lossy audio compression format. It is standardised
MPEG-1_Audio_Layer_II
Obsolete Microsoft Windows audio APIs
7 and Windows Server 2008 only. Audio Compression Manager (ACM) is a Windows multimedia framework that manages audio codecs (compressor/decompressors)
Windows legacy audio components
Windows_legacy_audio_components
Technology that records, stores, and reproduces sound
is then sent through an audio power amplifier and ultimately to a loudspeaker. Digital audio systems may include compression, storage, processing, and
Digital_audio
Audio codec
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio as part of the MPEG-4 standards.
High-Efficiency Advanced Audio Coding
High-Efficiency_Advanced_Audio_Coding
Lossless digital audio coding format
FLAC (/flæk/; Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, developed by the Xiph.Org Foundation, and
FLAC
Audio compression technologies
family of audio compression technologies developed by Dolby Laboratories. Called Dolby Stereo Digital until 1995, it uses lossy compression (except for
Dolby_Digital
Lossless Transform Audio Compression (LTAC) is a compression algorithm developed by Tilman Liebchen, Marcus Purat and Peter Noll at Institute for Telecommunications
Lossless Transform Audio Compression
Lossless_Transform_Audio_Compression
Topics referred to by the same term
Compression (geology) Bandwidth compression, reducing effort in data transmission Data compression, reducing the data required for information Audio compression
Compression
Electronic manipulation of audio signals
waves—longitudinal waves which travel through air, consisting of compressions and rarefactions. As audio signals may be represented in either digital or analog
Audio_signal_processing
Application of gain to a recording to achieve a target level
Audio normalization is the application of a constant amount of gain to an audio recording to bring the amplitude to a target level (the norm). Because
Audio_normalization
(typically 44.1 kHz). Lossless compression will have a variable bit rate. Free and open-source software portal Comparison of audio player software Comparison
Comparison of audio coding formats
Comparison_of_audio_coding_formats
Audio compression standard
Unified Speech and Audio Coding (USAC) is an audio compression format and codec for both music and speech or any mix of speech and audio using very low bit
Unified Speech and Audio Coding
Unified_Speech_and_Audio_Coding
Type of loudspeaker
the Audio Engineering Society. preprint 1384. Dodd, M.; Oclee-Brown, J. (October 2007). "A New Methodology for the Acoustic Design of Compression Driver
Compression_driver
Audio compression format optimized for speech coding
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
Adaptive Multi-Rate audio codec
Adaptive_Multi-Rate_audio_codec
Audio formats
form of the PASC (Precision Adaptive Subband Coding) audio compression codec. PASC and MPEG-1 Audio Layer I were essentially identical, except: The bit
MPEG-1_Audio_Layer_I
Digital audio compression artifact
In audio signal processing, pre-echo, is a digital audio compression artifact where in the reconstructed signal (following an encoding/decoding cycle)
Pre-echo
Audio compressor
The Empirical Labs EL8 Distressor Compressor/Limiter is an audio compression unit designed by Dave Derr and first sold in 1995. The name is a portmanteau
Empirical_Labs_Distressor
File format family
framework. WMV consists of three distinct codecs: the original video compression technology, known as WMV, originally designed for Internet streaming
Windows_Media_Video
context of audio transmission, there are some advantages to being unable to perceive a sound. In audio encoding, for example, better compression can be achieved
Masking_threshold
Device or program that encodes/decodes audio data in some bitstream format
stored audio file. Most software codecs are implemented as libraries which interface to one or more multimedia players. Most modern audio compression algorithms
Audio_codec
French computer programmer (born 1972)
"ts_zip: Text Compression using Large Language Models". bellard.org. Retrieved 2025-12-01. By (2024-04-24). "TSAC: Very Low Bitrate Audio Compression". bellard
Fabrice_Bellard
applications (just audio). Speex – speech codec Vorbis – a lossy audio compression format. WavPack – "Hybrid" (lossless/lossy) audio codec AV1 Dirac –
List_of_open_file_formats
Lossless audio coding format
MPEG-4 Audio Lossless Coding, also known as MPEG-4 ALS, is an extension to the MPEG-4 Part 3 audio standard to allow lossless audio compression. The extension
Audio_Lossless_Coding
Measurement of the power of a data compression algorithm
as Bluetooth audio streaming, as visual or audio compression artifacts from loss of important information are introduced. A compression ratio of at least
Data_compression_ratio
Assessment of the audio output from an electronic device
greatly reduced using audio compression. In audio compression, audio samples are processed using an audio codec. In a lossless codec audio samples are processed
Sound_quality
File format for storing digital video data
which container format and which video and audio compression formats are allowed. The coded video and audio inside a video file container (i.e. not headers
Video_file_format
Digital video file format
Smacker format specifies a container format, a video compression format, and an audio compression format. Since its release in 1994, Smacker has been used
Smacker_video
Open container format by Xiph.Org Foundation
the music-oriented Vorbis format or its successor Opus. Lossless audio compression formats include FLAC, and OggPCM. Until 2007, the .ogg filename extension
Ogg
Open-source lossy audio codec
Musepack or MPC is an open source lossy audio codec, specifically optimized for transparent compression of stereo audio at bitrates of 160–180 (manual set
Musepack
Audio compression technique
(transform-domain weighted interleave vector quantization) is an audio compression technique developed by Nippon Telegraph and Telephone Corporation
TwinVQ
Set of standards for multimedia file and streaming formats
include a media transport protocol standard, a video compression standard, an audio compression standard, a digital file format container standard, three
MPEG-H
Open-source lossless audio codec
lossless audio compression format and application implementing the format. It is unique in the way that it supports hybrid audio compression alongside
WavPack
Audio data compression technology
compresses audio data without loss of audio fidelity (the regular WMA format is lossy). WMA Voice, targeted at voice content, applies compression using a
Windows_Media_Audio
Computer technology
Silence compression is an audio processing technique used to effectively encode silent intervals, reducing the amount of storage or bandwidth needed to
Silence_compression
Format for digital video content
and audio (Vorbis) compression format is inside the Matroska container, even though Matroska is capable of containing VP9 video, and Opus audio support
Video_coding_format
libdash is a computer software library which provides an object-oriented interface to the Dynamic Adaptive Streaming over HTTP (DASH) standard. It is also
Libdash
Audiophile audio processing technology
for delivering high-quality digital audio. The system includes audio signal processing, lossy audio compression and authentication. MQA requires licensing
Master_Quality_Authenticated
Multimedia container format
encrypted/protected audio and video, G.719 audio compression specification, AC3 and E-AC-3 audio compression, DTS audio compression, Dirac video compression, VC-1 video
ISO_base_media_file_format
Swedish audio and medical engineer, inventor, and entrepreneur. He is noted for his pioneering work in the development of the audio compression technology
Lars_Liljeryd
Audio compression codec designed for human speech
see their project as complementary to the Vorbis general-purpose audio compression project. Since 2012, the developers of Speex have considered it to
Speex
Topics referred to by the same term
of TCP and UDP port numbers#Registered_ports Perceptual Audio Coder, a lossy audio compression algorithm Pin Array Cartridge, an integrated circuit packaging
PAC
Scientific study of sound perception
Many audio compression codecs such as MP3 and Opus use a psychoacoustic model to increase compression ratios. The success of conventional audio systems
Psychoacoustics
Lossy audio compression algorithm
Perceptual Audio Coder (PAC) is a lossy audio compression algorithm. It is used by Sirius Satellite Radio for their digital audio radio service. The original
Perceptual_Audio_Coder
Suite of digital video and audio formats
as well as stereo audio, still images, and graphics to be presented on a DOS-based desktop computer using a special compression chipset. The scope of
Digital_Video_Interactive
Nonprofit multimedia format organization
Vorbis – a lossy audio compression format and codec Theora – a lossy video coding format and codec FLAC – a lossless audio compression format and software
Xiph.Org_Foundation
Audio technology company
American technology corporation specializing in audio noise reduction, audio encoding/compression, spatial audio, and high-dynamic-range television (HDR) imaging
Dolby
Read-only optical disc for high-fidelity audio storage
Transfer compression was standardized as an amendment to the MPEG-4 Audio standard, ISO/IEC 14496-3:2001/Amd 6:2005 (Lossless coding of oversampled audio), in
Super_Audio_CD
File format standard for storing audio on PCs
On Microsoft Windows, the WAV format supports compressed audio using the Audio Compression Manager (ACM). Any ACM codec can be used to compress a WAV
WAV
Component of an audio mixer
condenser microphones and some form of audio equalization. Some designs also offer other facilities including audio compression, de-essing, noise-gating and limiting
Channel_strip
Type of sound
of that sound. Transients are more difficult to encode with many audio compression algorithms, causing pre-echo. Look up transient in Wiktionary, the
Transient_(acoustics)
Perceptually indistinguishable data compression
In data compression and psychoacoustics, transparency is the result of lossy data compression advanced enough that the compressed result is perceptually
Transparency (data compression)
Transparency_(data_compression)
Digital representation of sampled analog signals
detailed in the G.726 standard. Audio coding formats and audio codecs have been developed to achieve further compression. Some of these techniques have
Pulse-code_modulation
Audio codec
MPEG-1 Audio Layer III HD (more commonly known by its abbreviation mp3HD) was an audio compression codec developed by Technicolor, formerly known as Thomson
Mp3HD
Signal representation used in automatic speech recognition
sound, for example, in audio compression that might potentially reduce the transmission bandwidth and the storage requirements of audio signals. MFCCs are
Mel-frequency_cepstrum
Portable device capable of storing and playing digital media
degrading audio quality. Lossless formats include Apple Lossless and FLAC. Lossy compression formats: Most audio formats use lossy compression, to further
Portable_media_player
Platform for users to upload, share, or live stream videos on the Internet
(MDCT) is also the basis for the MP3 audio compression format introduced in 1994, and later the Advanced Audio Coding (AAC) format in 1999. The first
Online_video_platform
Audio codec
Coding) with SBR (spectral band replication) is a proprietary lossy audio compression codec developed by iBiquity for use with HD Radio. It replaced the
High-Definition_Coding
Double-blind audio quality testing method
digital audio data compression methods; sample A is typically an uncompressed sample, and sample B is a compressed version of A. Audible compression artifacts
ABX_test
for patent infringement when Microsoft introduced the DoubleSpace data compression scheme into MS-DOS. Stac was awarded $120 million by a jury in 1994 and
List_of_software_patents
Family of proprietary audio codecs owned by Qualcomm
audio processing technology) is a family of proprietary audio codec compression algorithms owned by Qualcomm, with a heavy emphasis on wireless audio
AptX
Evolution of auditory media
using a variety of audio formats, some of which store additional information. Timeline of video formats Format war Audio data compression "The Electrical
Timeline_of_audio_formats
Dynamic range compression technique
called it "side-chain" compression, most likely due to a misquoting of a citation of the article in Roey Izhaki's book, Mixing Audio: Concepts, Practices
Parallel_compression
Company which developed digital audio compression technologies
a developer of digital audio compression technologies. The company's MP2 and MP3 technologies were used in professional audio and broadcast automation
QDesign
and audio compression codecs developed by Nero AG of Germany and Ateme of France. The audio codecs are integrated into the Nero Digital Audio+ audio encoding
Nero_Digital
Removal of imperfections from recorded sound
and flutter, background noise, mains hum, and lossy audio compression) from sound recordings. Audio restoration can be performed directly on the recording
Audio_restoration
Alliance of working groups for multimedia coding
ISO and IEC that sets standards for media coding, including compression coding of audio, video, graphics, and genomic data; and transmission and file
Moving_Picture_Experts_Group
Audio codec
EC-3), is a digital audio compression scheme developed by Dolby Labs for the transport and storage of multi-channel digital audio. It is a successor to
Dolby_Digital_Plus
Audio codec and compression format
SILK is an audio compression format and audio codec developed by Skype Limited, now a Microsoft subsidiary. It was developed for use in Skype, as a replacement
SILK
Digital radio broadcasting standard
factor, and computer processing power is cheap; modern CPU-intensive audio compression techniques enable more efficient use of available bandwidth, at the
Digital_Radio_Mondiale
Topics referred to by the same term
lossless audio compression codec DTS-HD Master Audio, lossless audio compression codec High Definition Compatible Digital, discontinued digital audio optical
High_definition
Audio codec and compression format
royalty-free lossy audio compression format and a free software codec with especially low algorithmic delay for use in low-latency audio communication. The
CELT
Video encoding standard
is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to about 1.5 Mbit/s
MPEG-1
Audio compression technology for AES3
Dolby E is a lossy audio compression and decoding technology developed by Dolby Laboratories that allows 6 to 8 channels of audio to be compressed into
Dolby_E
Royalty-free lossy audio encoding format
Foundation. The project produces an audio coding format and software reference encoder/decoder (codec) for lossy audio compression, libvorbis. Vorbis is most commonly
Vorbis
Audio compression technology
Dolby AC-4 is an audio compression technology developed by Dolby Laboratories. Dolby AC-4 bitstreams can contain audio channels and/or audio objects. Dolby
Dolby_AC-4
Early name for the Ogg project
company to create a royalty-free lossless audio compression codec. The Ogg project began with a simple audio compression package as part of a larger project
Ogg_Squish
Lossy audio coding format
PlayStation®4". Sony Interactive Entertainment Inc. Retrieved 2017-12-11. "Audio compression comparison analysis of videos recorded in Tiktok: Android vs. iPhone"
Opus_(audio_format)
Sound system developed by Dolby
sound to movie-goers. It is the most recent addition to a family of audio compression technologies developed by Dolby known as Dolby Digital. It adds two
Dolby_Surround_7.1
lossy data compression that exploits the limitations of human sensory system in order to reduce data size. It is widely applied in audio, image and video
Perceptual_coding
Video encoding standard
pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods, which permit
MPEG-2
Technique used in signal processing and data compression
used in most modern audio compression formats, such as Dolby Digital (AC-3), MP3 (which uses a hybrid DCT-FFT algorithm), Advanced Audio Coding (AAC), and
Discrete_cosine_transform
Lossless audio compression codec
OptimFROG is a proprietary, lossless audio codec developed by Florin Ghido. OptimFROG is optimized for high compression (small file sizes) at the expense
OptimFROG
Mathematical technique used in data compression and analysis
Wavelet compression is a form of data compression well suited for image compression (sometimes also video compression and audio compression). Notable
Wavelet_transform
Lossless digital audio coding format
codecs). The data compression software for encoding into ALAC files, Apple Lossless Encoder, was introduced into the Mac OS X Core Audio framework on April
Apple_Lossless_Audio_Codec
Condensed digital summary generated from an audio signal
frequency bands, and bandwidth. Most audio compression techniques will make radical changes to the binary encoding of an audio file, without radically affecting
Acoustic_fingerprint
MPEG-1 Audio Layer 3 (MP3) audio encoder
LAME is a software encoder that converts digital audio into the MP3 audio coding format. LAME is a free software project that was first released in 1998
LAME
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AUDIO COMPRESSION
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AUDIO COMPRESSION
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