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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 was finalized in December 2005 and published as ISO/IEC 14496-3:2005/Amd 2:2006 in 2006. The latest description of MPEG-4 ALS was published as subpart 11 of the MPEG-4 Audio standard (ISO/IEC 14496-3:2019) (5th edition) in December 2019.

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  • Audio Lossless Coding (en)
  • MPEG-4 ALS (cs)
  • MPEG-4 Audio Lossless Coding (de)
  • MPEG-4 ALS (ja)
  • MPEG-4 ALS (zh)
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  • MPEG-4 ALS (Audio Lossless Coding, ALS) je rozšíření standardu komprese zvuku MPEG-4 Part 3, který je určen k bezeztrátové kompresi. Byl dokončen roku 2005. Někdy je přirovnáván k FLAC pro podobné výsledky. Podporuje multikanálové přehrávání nebo libovolnou samplovaní frekvenci. Rozšířenost tohoto formátu je naprosto minimální. (cs)
  • MPEG-4 Audio Lossless Coding, auch bekannt unter MPEG-4 ALS, ist eine Erweiterung zum MPEG-4-Audio-Standard, um verlustfreie Kompression zu ermöglichen. Die Entwicklung dieser Erweiterung wurde im Dezember 2005 abgeschlossen. (de)
  • MPEG-4 ALS (MPEG-4 Audio Lossless Coding) はMPEG-4オーディオ (MPEG-4 Part 3) の一部として規格化されたロスレス圧縮方式で、スタジオ編集などでも使える高音質のマルチチャネルオーディオ信号を扱うことができる。 MPEG-4 ALSは、インターネットでの音楽配信、携帯ミュージックプレーヤ、音楽アーカイブシステムやスタジオ編集などさまざまな用途への応用が考えられており、FFmpegなどさまざまなソフトウェアでサポートされている。 (ja)
  • 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 was finalized in December 2005 and published as ISO/IEC 14496-3:2005/Amd 2:2006 in 2006. The latest description of MPEG-4 ALS was published as subpart 11 of the MPEG-4 Audio standard (ISO/IEC 14496-3:2019) (5th edition) in December 2019. (en)
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  • Audio Lossless Coding (en)
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  • MPEG-4 ALS (Audio Lossless Coding, ALS) je rozšíření standardu komprese zvuku MPEG-4 Part 3, který je určen k bezeztrátové kompresi. Byl dokončen roku 2005. Někdy je přirovnáván k FLAC pro podobné výsledky. Podporuje multikanálové přehrávání nebo libovolnou samplovaní frekvenci. Rozšířenost tohoto formátu je naprosto minimální. (cs)
  • 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 was finalized in December 2005 and published as ISO/IEC 14496-3:2005/Amd 2:2006 in 2006. The latest description of MPEG-4 ALS was published as subpart 11 of the MPEG-4 Audio standard (ISO/IEC 14496-3:2019) (5th edition) in December 2019. MPEG-4 ALS combines a short-term predictor and a long term predictor. The short-term predictor is similar to FLAC in its operation - it is a quantized LPC predictor with a losslessly coded residual using Golomb Rice Coding or (BGMC). The long term predictor is modeled by 5 long-term weighted residues, each with its own lag (delay). The lag can be hundreds of samples. This predictor improves the compression for sounds with rich harmonics (containing multiples of a single fundamental frequency, locked in phase) present in many musical instruments and human voice. (en)
  • MPEG-4 Audio Lossless Coding, auch bekannt unter MPEG-4 ALS, ist eine Erweiterung zum MPEG-4-Audio-Standard, um verlustfreie Kompression zu ermöglichen. Die Entwicklung dieser Erweiterung wurde im Dezember 2005 abgeschlossen. (de)
  • MPEG-4 ALS (MPEG-4 Audio Lossless Coding) はMPEG-4オーディオ (MPEG-4 Part 3) の一部として規格化されたロスレス圧縮方式で、スタジオ編集などでも使える高音質のマルチチャネルオーディオ信号を扱うことができる。 MPEG-4 ALSは、インターネットでの音楽配信、携帯ミュージックプレーヤ、音楽アーカイブシステムやスタジオ編集などさまざまな用途への応用が考えられており、FFmpegなどさまざまなソフトウェアでサポートされている。 (ja)
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