By Topic

Subband audio coding using a perceptually hybrid vector-scalar quantization

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Yu Rongshan ; Nanyang Technol. Inst., Singapore

This paper presents a novel perceptually hybrid vector-scalar quantization scheme for high quality subband audio coding at low bit rates. A QMF filter bank is used to decompose, in the frequency domain, the input audio signal into constant width subbands. Each subband is then quantized using either a multi-stage vector quantizer or a scalar quantizer. In order to obtain a high quality audio, a dynamic bit-allocation algorithm is used to select the best quantizer for each subband based on the outputs of a psychoacoustic model and the total quantization bits available. The performance of the proposed coder is assessed from segmental signal-to-noise ratios (SEGSNR) and informal listening tests, which show that the proposed audio coder with the perceptually hybrid vector-scalar quantization scheme is superior in both objective and subjective performances compared with a subband audio coder with full scalar quantization

Published in:

Multimedia and Expo, 2000. ICME 2000. 2000 IEEE International Conference on  (Volume:2 )

Date of Conference: