Sorry, you need to enable JavaScript to visit this website.

Pre-Echo Noise Reduction in Frequency-Domain Audio Codecs (Poster)

Error message

  • The specified file temporary://file2lUMkP could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://fileVP9AJd could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://fileaZHBpU could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://file12m41n could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://filerCrbMj could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://file5da49a could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://fileiU7e5P could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://filewk6d2C could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
Citation Author(s):
Jimmy Lapierre, Roch Lefebvre
Submitted by:
Jimmy Lapierre
Last updated:
1 March 2017 - 7:11pm
Document Type:
Poster
Document Year:
2017
Event:
Presenters:
Jimmy Lapierre
Paper Code:
2630
Categories:
Keywords:
 

One of the most common yet detrimental compression artifacts in frequency-domain audio codecs is known as pre-echo, which is perceived as a brief noise preceding transient signals, and is discernable even without direct comparison to the original signal. Because of its substantial negative impact on audio quality, many techniques have been proposed to alleviate it, but not without effect on coding efficiency. This paper presents a novel method to reduce pre-echo noise using only information already available at the decoder, such as scale-factors, that allow an estimation of the quantization noise levels in each frequency band. Doing so allows the proposed method to reduce pre-echo noise based on a precise modeling of the quantization noise spread before the transient signal. This has shown to improve both the subjective and objective quality of the MPEG AAC codec, and requires no modifications to the existent standard-compliant encoders.

up
0 users have voted: