A Low Complexity Spatial Parameter Codec Algorithm in MDCT Domain

Author

Sheng, Cao ; Yuxing, Peng ; Yutian, Liu

Author_Institution

Nat. Eng. Res. Center for Multimedia Software, Wuhan Univ., Wuhan, China

fYear

2011

fDate

27-29 June 2011

Firstpage

2881

Lastpage

2884

Abstract

With stereo audio steping into people´s daily lives, spatial parametric technology comes to its broad prospects for development. Spatial parameteric technology is a method for stereo compression. MDCT is excluded in the current scheme for spatial cues representation,due to its lacking of phase information and energy conservation. In this paper, Construction of new spatial parameter codec framework in MDCT domain, and Optimization of calculating for the new module, to reduce computational complexity of the system. A Low Complexity Spatial Parameter Codec Algorithm in MDCT Domain was proposed to improve it. The MDCT-MDST conversion, in matrix form, is approximating to a banded sparse matrix. To compare with the EaacPlus system, this method avoids separate transforming for cues representation and saves significant computation, realizing low-complexity and high-efficiency spatial parameter codec, reducing 26.1% of operation complexity.

Keywords

codecs; computational complexity; data compression; discrete cosine transforms; matrix algebra; optimisation; EaacPlus system; MDCT-MDST conversion; banded sparse matrix; computational complexity; energy conservation; phase information; spatial cues representation; spatial parameter codec algorithm; stereo compression; Complesity; Compression; MDCT; Spatialparameters; Stereo;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Service System (CSSS), 2011 International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-9762-1

Type

conf

DOI

10.1109/CSSS.2011.5974414

Filename

5974414