Sonnox Fraunhofer Pro-Codec Manual de usuario descargar pdf (Pagina 6)

2 TERMINOLOGY

2 Terminology

Bitrate

This is the number of bits transmitted or processed per unit of time, expressed here

in kilobits per second (kbps).

CBR

Constant Bit Rate –- bit rate remains the same for the duration of the audio signal.

VBR

Variable Bit Rate –- bit rate changes over time, based on the complexity of the signal.

In this case, the VBR value expressed is an average over the length of the ﬁle.

Encoder

In this context, an encoder converts an uncompressed LPCM audio stream into a

smaller, compressed format through the use of lossy compression. For HD-AAC, the

encoding process is lossless to the target bit depth.

Decoder

In this context, a decoder converts a compressed audio stream back into an

uncompressed LPCM audio stream.

Metadata

This is categorical information about a ﬁle, such as the song Title, Artist and Album.

Tag A tag is one speciﬁc piece of metadata, such as the song Title.

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Sonnox Fraunhofer Pro-Codec Manual de usuario Pagina 6