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  2. Audio codec - Wikipedia

    en.wikipedia.org/wiki/Audio_codec

    Most modern audio compression algorithms are based on modified discrete cosine transform (MDCT) coding and linear predictive coding (LPC). In hardware, audio codec refers to a single device that encodes analog audio as digital signals and decodes digital back into analog.

  3. Audio coding format - Wikipedia

    en.wikipedia.org/wiki/Audio_coding_format

    A specific software or hardware implementation capable of audio compression and decompression to/from a specific audio coding format is called an audio codec; an example of an audio codec is LAME, which is one of several different codecs which implements encoding and decoding audio in the MP3 audio coding format in software.

  4. Sub-band coding - Wikipedia

    en.wikipedia.org/wiki/Sub-band_coding

    A classic method is nonlinear PCM, such as the μ-law algorithm. Small signals are digitized with finer granularity than are large ones; the effect is to add noise that is proportional to the signal strength. Sun's Au file format for sound is a popular example of mu-law encoding. Using 8-bit mu-law encoding would cut the per-channel bitrate of ...

  5. MP3 - Wikipedia

    en.wikipedia.org/wiki/MP3

    As the MP3 standard allows quite a bit of freedom with encoding algorithms, different encoders do feature quite different quality, even with identical bit rates. As an example, in a public listening test featuring two early MP3 encoders set at about 128 kbit/s , [ 75 ] one scored 3.66 on a 1–5 scale, while the other scored only 2.22.

  6. List of audio programming languages - Wikipedia

    en.wikipedia.org/wiki/List_of_audio_programming...

    This is a list of notable programming languages optimized for sound production, algorithmic composition, and sound synthesis.. ABC notation, a language for notating music using the ASCII character set

  7. Speech coding - Wikipedia

    en.wikipedia.org/wiki/Speech_coding

    Speech coding is an application of data compression to digital audio signals containing speech.Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.

  8. High-Efficiency Advanced Audio Coding - Wikipedia

    en.wikipedia.org/wiki/High-Efficiency_Advanced...

    XLD, a macOS audio encoding program, offers encoding from any of its supported formats to HE-AAC. Nokia PC Suite may encode audiofiles to eAAC+ format before transmitting them to mobile phone. HE-AAC v1 and v2 encoders are provided by the Fraunhofer FDK AAC library in Android 4.1 and later versions.

  9. Comparison of audio coding formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_audio_coding...

    For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint. First public release date is first of either specification publishing or source releasing, or in the case of closed-specification, closed-source codecs ...