Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Per Hedelin"'
Autor:
Jens Popp, Hannes Muesch, Kristofer Kjörling, Jeroen Koppens, Janusz Klejsa, Michael Schug, Sripal S. Mehta, Toni Hirvonen, Jonas Samuelsson, Heidi-Maria Lehtonen, Mark Stuart Vinton, Per Ekstrand, Martin Wolters, Leif Sehlstrom, Lars Villemoes, Harald Mundt, Kurt Krauss, Jeffrey Riedmiller, Karsten Linzmeier, Scott G. Norcross, Prinyar Boon, Alexander Gröschel, Tim Carroll, Barbara Resch, Arijit Biswas, Heiko Purnhagen, Per Hedelin, Holger Hörich, Jonas Röden, Nicolas R. Tsingos
Publikováno v:
IEEE Transactions on Broadcasting. 63:179-201
AC-4 is a state-of-the-art audio codec standardized in ETSI (TS 103 190 and TS 103 190-2) and included in the DVB toolbox (TS 101 154 V2.2.1 and DVB BlueBook A157) and, at the time of writing, is a candidate standard for ATSC 3.0 as per A/342 part 2.
Publikováno v:
INTERSPEECH
Publikováno v:
WASPAA
We show how model based prediction can be employed in the construction of a speech codec which operates entirely in the frequency domain of a Modified Discrete Cosine Transform (MDCT). The codec tools described in this paper are part of the Dolby AC-
Publikováno v:
IEEE Transactions on Image Processing. 17:145-154
In this paper, Gaussian mixture modeling is applied toerror concealment for block-based packet video. A Gaussian mixture model for video data is obtained offline and is thereafter utilized online in order to restore lost blocks from spatial and tempo
Autor:
T.Z. Shabestary, Per Hedelin
Publikováno v:
IEEE Transactions on Speech and Audio Processing. 13:811-820
We present a fixed rate encoding scheme for the line spectrum pair (LSP) representation of an LPC-filter, based on Gaussian mixture (GM) modeling. For each mixture component, we construct a codebook by a union of product quantizers. Each local codebo
Autor:
Per Hedelin, F. Norden
Publikováno v:
Nordén, F & Hedelin, P 2005, ' Companded quantization of speech MDCT coefficients ', IEEE transactions on speech and audio processing, vol. 13, no. 2, pp. 163-173 .
Here, we propose speech-coding procedures achieving high subjective quality, avoiding speech-specific processing and interframe exploitation. Thus, the scheme is tractable for packet-based voice communication, and has the capability of coding generic
Autor:
J. Samuelsson, Per Hedelin
Publikováno v:
IEEE Transactions on Speech and Audio Processing. 9:492-503
A theoretical analysis of recursive speech spectrum coding, where predictive and finite state schemes are special cases, is presented. We evaluate the spectral distortion (SD) theoretically and design coders that minimize the SD. The analysis rests o
Autor:
Per Hedelin, Jan Skoglund
Publikováno v:
IEEE Transactions on Speech and Audio Processing. 8:385-401
We model the underlying probability density function of vectors in a database as a Gaussian mixture (GM) model. The model is employed for high rate vector quantization analysis and for design of vector quantizers. It is shown that the high rate formu
Autor:
Per Hedelin, Mikael Skoglund
Publikováno v:
IEEE Transactions on Information Theory. 45:515-532
We present an estimator-based, or soft, vector quantizer decoder for communication over a noisy channel. The decoder is optimal according to the mean-square error criterion, and Hadamard-based in the sense that a Hadamard transform representation of
Publikováno v:
WASPAA
In systems for High Frequency Reconstruction (HFR) employing harmonic transposition, there is a risk of introducing artifacts due to conflicting design goals for stationary, transient, and periodic signals. We describe a filter bank implementation of