Lossless audio formats

Lossless audio formats

• There are different types of formats for audio compression, this time we will talk a little about those with compression and no loss

 

There are different types of formats (García Gago, 2014) for audio compression, this time we will talk a little about those with compression and no loss, the main ones are Flac, Atrac, Ape and Aiff, these should not be confused with uncompressed audio where the main ones are Wav and Cda.

The codec are necessary for each of the formats, the most common are DTS, RealAudio Lossless, MPEG-4, APE, WMA Lossless and Flac.

The oldest formats use the structure of the resource exchange files (as an example the AIFF structure), instead the current formats use the structure of the compression algorithms (like zip example), now an example of structure (Borg, n.d.):

#define CommonID 'COMM'
typedef struct {
  ID             chunkID;
  long           chunkSize;

  short          numChannels;
  unsigned long  numSampleFrames;
  short          sampleSize;
  extended       sampleRate;
} CommonChunk;

Metadata

They can be administrative, technical, descriptive, structural.

As an example the ID3 Tags (Wikipedia, 2014).

XML

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Edit_Mensaje SYSTEM "Edit_Mensaje.dtd">

<Edit_Mesage>
      <Message>
           <Sender>
                <Name> Name of the sender </ Name>
                <Mail> Sender's Mail </ Mail>
           </ Sender>
           <Recipient>
                <Name> Recipient's name </ Name>
                <Mail> Recipient's email </ Mail>
           </ Recipient>
<Text>
                <Subject>
                     This is my document with a very simple structure
                     it does not contain attributes or entities ...
                </ Subject>
                <Parrafo>
                     This is my document with a very simple structure
                     it does not contain attributes or entities ...
                </ Pararafo>
           </ Text>
      </ Message>
</ Edit_Message>

References:

Borg. (s.f.). Audio Interchange File Format. Recuperado de http://www.borg.com/~jglatt/tech/aiff.htm

García Gago, S. (2014). "¿Cuáles son los formatos de audio digital?". En Radios Libres. Recuperado de https://radioslibres.net/32-cuales-son-los-formatos-de-audio-digital/

Wikipedia. (2014). Extensible Markup Language. Recuperado de https://es.wikipedia.org/wiki/Extensible_Markup_Language

How to cite this article:

Nocetti, F.A. (2014). "Lossless audio formats". In NabbuBlog. Retrieved from http://nabbublog.blogspot.com/2014/11/lossless-audio-formats.html