Title :
Perceptual Enhancement for Fully Scalable Audio
Author :
Li, Te ; Rahardja, Susanto ; Koh, Soo Ngee
Author_Institution :
Inst. for Infocomm Res., Singapore
Abstract :
MPEG-4 scalable lossless (SLS) coding is the latest released ISO international standard for scalable audio coding. Besides its function as an extension of MPEG-4 advanced audio coding (AAC) perceptual audio coder, SLS has a "non-core mode" that is able to offer full scalability. The perceptual audio coder is absent in this mode and scalability is achieved through pure bit-plane coding. In this paper, a perceptually enhanced bit-plane coding method, namely Quad-level bit-plane coding (QBPC) is proposed to enhance the perceptual quality of fully scalable audio at intermediate bitrates. With QBPC structure, the perceptual quality of fully scalable audio coded by SLS is significantly improved in a wide range of intermediate bitrates. Meanwhile this is achieved with trivial added overhead and complexity.
Keywords :
ISO standards; audio coding; AAC; ISO international standard; MPEG-4 scalable lossless coding; advanced audio coding; fully scalable audio; intermediate bitrates; noncore mode; perceptual enhancement; quad-level bit-plane coding; Audio coding; Bit rate; Frequency conversion; ISO standards; Image coding; Laser sintering; MPEG 4 Standard; Scalability; Tellurium; Transcoding;
Conference_Titel :
Multimedia Signal Processing, 2007. MMSP 2007. IEEE 9th Workshop on
Conference_Location :
Crete
Print_ISBN :
978-1-4244-1274-7
DOI :
10.1109/MMSP.2007.4412811
