Patent
Multi-channel audio encoding and decoding
Naveen Thumpudi,Wei-ge Chen +1 more
- 04 Sep 2003
144
TL;DR: In this article, the authors describe architectures and techniques that improve the efficiency of multi-channel audio coding and decoding, which can be used in combination or independently, and describe various techniques and tools.
read more
Abstract: An audio encoder and decoder use architectures and techniques that improve the efficiency of multi-channel audio coding and decoding. The described strategies include various techniques and tools, which can be used in combination or independently. For example, an audio encoder performs a pre-processing multi-channel transform on multi-channel audio data, varying the transform so as to control quality. The encoder groups multiple windows from different channels into one or more tiles and outputs tile configuration information, which allows the encoder to isolate transients that appear in a particular channel with small windows, but use large windows in other channels. Using a variety of techniques, the encoder performs flexible multi-channel transforms that effectively take advantage of inter-channel correlation. An audio decoder performs corresponding processing and decoding. In addition, the decoder performs a post-processing multi-channel transform for any of multiple different purposes.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Patent
Encoding device, decoding device, and method thereof
Tomofumi Yamanashi,Masahiro Oshikiri +1 more
- 29 Feb 2008
TL;DR: The speech encoding apparatus (220) as mentioned in this paper has a first layer encoding section (2201), a first-layer decoding section (2202), a delay section(2203), a subtracting section (104), a frequency domain transforming section (101), a second-layer encoding section(105) and a multiplexing section(106).
186
Patent
Audio encoding and decoding
Dirk Jeroen Breebaart,Erik Gosuinus Petrus Schuijers,Arnoldus Werner Johannes Oomen +2 more
- 07 Jul 2006
TL;DR: In this paper, a hierarchical decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoding structure.
155
Patent
Parametric joint-coding of audio sources
TL;DR: In this article, the authors proposed a joint coding scheme that considers the statistical properties of the source signals, the properties of mixing techniques, and spatial hearing to determine the perceptually important spatial cues of the final mixed audio channels.
121
Patent
Bitstream syntax for multi-process audio decoding
Kazuhito Koishida,Sanjeev Mehrotra,Chao He,Wei-ge Chen +3 more
- 29 Jun 2007
TL;DR: In this article, an audio decoder provides a combination of decoding components including components implementing base band decoding, spectral peak decoding, frequency extension decoding and channel extension decoding techniques, and a bitstream syntax scheme to permit the various decoding components to extract the appropriate parameters for their respective decoding technique.
116
Patent
Efficient coding of digital media spectral data using wide-sense perceptual similarity
Sanjeev Mehrotra,Wei-ge Chen +1 more
- 29 Jul 2004
TL;DR: In this paper, the omitted spectral coefficients are divided into a number of sub-bands and the subbands are encoded as two parameters: a scale factor and a shape parameter, which represent the energy in the band and shape of the band, respectively.
98
References
Discrete Cosine Transform
TL;DR: In this article, a discrete cosine transform (DCT) is defined and an algorithm to compute it using the fast Fourier transform is developed, which can be used in the area of digital processing for the purposes of pattern recognition and Wiener filtering.
5.1K
Patent
System and method for managing copyrighted electronic media
John S. Erickson
- 17 Feb 2004
TL;DR: In this article, the authors present a system for the management of copyright-preserving electronic media in a secure electronic format and registered on associated registration server, which serves to provide on-line licensing and copyright management for that media.
1K
Transform coding of audio signals using perceptual noise criteria
TL;DR: A 4-b/sample transform coder is designed using a psychoacoustically derived noise-making threshold that is based on the short-term spectrum of the signal, and tested in a formal subjective test involving a wide selection of monophonic audio inputs.
•Journal Article
ISO/IEC MPEG-2 Advanced Audio Coding
Marina Bosi,Karlheinz Brandenburg,Schuyler Quackenbush,Louis Dunn Fielder,Kenzo Akagiri,Hendrik Fuchs,Martin Dietz +6 more
TL;DR: The ISO/IEC MPEG-2 advanced audio coding (AAC) system was designed to provide MPEG2 with the best audio quality without any restrictions due to compatibility requirements.
617
Analysis/Synthesis filter bank design based on time domain aliasing cancellation
John Princen,A. Bradley +1 more
TL;DR: A single-sideband analysis/synthesis system is proposed which provides perfect reconstruction of a signal from a set of critically sampled analysis signals and allows overlap between adjacent time windows, implying that time domain aliasing is introduced in the analysis; however, thisAliasing is cancelled in the synthesis process, and the system can provide perfect reconstruction.
586