Subband coding is an efficient technique to compress audio and video signals. Signal spectrum is divided into subbands that are separately quantized and coded. In nonuniform filter banks, the subbands have different width. The use of nonuniform filter banks is attractive in some applications, such as audio coding, where the spectrum decomposition can be designed to match as close as possible the partition in critical bands of the human auditory system. This can simplify the subband quantization procedure, even if, as a drawback, the design and implementation of nonuniform filter banks is more troublesome than that of uniform ones. In this study, we describe a method to design nonuniform filter banks and the implementation of a real-time audio coder based on the TMS320C6201 DSP.
Design and implementation of a nonuniform subband audio coder / F. Argenti; A. Mannuccini; E. Del Re. - STAMPA. - (2000), pp. 1-5. (Intervento presentato al convegno Third European DSP Education & Research Conference tenutosi a Paris nel 20-21 September 2000).
Design and implementation of a nonuniform subband audio coder
ARGENTI, FABRIZIO;DEL RE, ENRICO
2000
Abstract
Subband coding is an efficient technique to compress audio and video signals. Signal spectrum is divided into subbands that are separately quantized and coded. In nonuniform filter banks, the subbands have different width. The use of nonuniform filter banks is attractive in some applications, such as audio coding, where the spectrum decomposition can be designed to match as close as possible the partition in critical bands of the human auditory system. This can simplify the subband quantization procedure, even if, as a drawback, the design and implementation of nonuniform filter banks is more troublesome than that of uniform ones. In this study, we describe a method to design nonuniform filter banks and the implementation of a real-time audio coder based on the TMS320C6201 DSP.File | Dimensione | Formato | |
---|---|---|---|
Design and implementation of a nonuniform subband audio coder.pdf
accesso aperto
Tipologia:
Pdf editoriale (Version of record)
Licenza:
Tutti i diritti riservati
Dimensione
351.16 kB
Formato
Adobe PDF
|
351.16 kB | Adobe PDF |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.