A fine granular scalable perceptually lossy and lossless audio coder
نویسندگان
چکیده
This paper presents Advanced Audio Zip (AAZ), an audio codec that provides the fine granular bit-rate scalability from lossy to lossless coding. Perceptually embedded coding principle is employed in AAZ to provide lossy reconstruction with optimal perceptual quality at intermediate bit-rates. AAZ also provides the backward compatibility where the lossless bit-stream embeds a compliant MPEG-4 AAC bit-stream.
منابع مشابه
A Scalable to Lossless Audio Compression Scheme
This paper outlines a scalable to lossless coder, that is the coder presented is a scalable coder that scales from lossy quality to lossless quality. Lossless compression is achieved by concatenating a lossy, scalable transform coder with a scalable scheme for the compression of the synthesis error signal. The lossless compression results obtained are comparable with the state of the art in los...
متن کاملA Scalable Watermarking Scheme for the Scalable Audio
—In this paper, we describe a scalable (i.e., lossless-to-lossy) watermarking scheme which overcomes the problem of non-invertible distortion introduced by the watermark signal. The scheme is based on a standardized scalable audio coder [9] – as a result, the embedded watermark inherits the scalability of the audio coder. We elaborate how the scalability can be used to realize the recovery of t...
متن کاملA progressive to lossless embedded audio coder (PLEAC) with reversible modulated lapped transform
A progressive to lossless embedded audio coder (PLEAC) has been proposed. PLEAC is based purely on reversible transform, which is designed to mimic the non-reversible transform in a normal psychoacoustic audio coder as much as possible. Coupled with a high performance embedded entropy codec, this empowers PLEAC with both lossless capability and tine granular scalability. The PLEAC encoder gener...
متن کاملMPEG-4 Scalable to Lossless Audio Coding
As the latest extension of MPEG-4 Audio coding, MPEG-4 Lossless Audio Coding includes a scalable audio coding solution (SLS) that integrates the functionalities of lossless audio coding, perceptual audio coding, and fine granular scalable audio coding into a single coder framework while providing backward compatibility to MPEG Advanced Audio Coding (AAC) at the bit-stream level. Despite its abu...
متن کاملScalable to lossless audio compression based on perceptual set partitioning in hierarchical trees (PSPIHT)
This paper proposes a technique for scalable and also provides for lossless compression. It reduces smooth objective scalability, in terms of SegSNR, from lossy to lossless compression. The proposal is built around the perceptual SPIHT algorithm, which is a modification of the SPIHT algorithm and is introduced in this paper. Both objective and subjective results are reported and demonstrate tha...
متن کامل