Wide-Band Audio Coding based on Frequency Domain Linear Prediction

We revisit an original concept of speech coding in which the signal is separated into the carrier modulated by the signal envelope. A recently developed technique, called frequency-domain linear prediction (FDLP), is applied for the efficient estimation of the envelope. The processing in the temporal domain allows for a straightforward emulation of the forward temporal masking. This, combined with an efficient nonuniform sub-band decomposition and application of noise shaping in spectral domain instead of temporal domain (a technique to suppress artifacts in tonal audio signals), yields a codec that does not rely on the linear speech production model but rather uses well-accepted concept of frequency-selective auditory perception. As such, the codec is not only specific for coding speech but also well suited for coding other important acoustic signals such as music and mixed content. The quality of the proposed codec at 66 kbps is evaluated using objective and subjective quality assessments. The evaluation indicates competitive performance with the MPEG codecs operating at similar bit rates.


Editor(s):
Raj, Bhiksha
Published in:
EURASIP Journal on Audio Speech and Music Processing, 2010, 856280
Year:
2010
Keywords:
Note:
Special Issue: Scalable Audio-Content Analysis
Laboratories:




 Record created 2010-02-11, last modified 2018-03-17

n/a:
Download fulltextPDF
External links:
Download fulltextURL
Download fulltextRelated documents
Download fulltextURL
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)