Patent
Voice encoding device, voice decoding device, and methods therefor
Toshiyuki Matsushita Elc.Ind.Co. Ltd Morii
- 01 Sep 2005
12
TL;DR: In this paper, an encoding device capable of realizing a scalable CODEC of a high performance was proposed, where an LPC analyzing unit (551) analyzes an input voice (301) efficiently with a synthesized LPC parameter obtained from a core decoder (305), to acquire an encoded LPC coefficient.
read more
Abstract: An encoding device capable of realizing a scalable CODEC of a high performance. In this encoding device, an LPC analyzing unit (551) analyzes an input voice (301) efficiently with a synthesized LPC parameter obtained from a core decoder (305), to acquire an encoded LPC coefficient. An adaptive code note (552) is stored with its sound source codes, as acquired from the core decoder (305). The adaptive code note (552) and a stochastic code note (553) send sound source samples to a gain adjusting unit (554). This gain adjusting unit (554) multiplies the individual sound source samples by an amplification based on the gain parameters acquired from the core decoder (305), and then adds the products to acquire sound source vectors. These vectors are sent to an LPC synthesizing unit (555). This LPC synthesizing unit (555) filters the sound source vectors acquired at the gain adjusting unit (554), with the LPC parameter, to acquire a synthetic signal.
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
Apparatus and method for encoding or decoding an audio signal with intelligent gap filling in the spectral domain
Sascha Disch,Frederik Nagel,Geiger Ralf,Balaji Thoshkahna,Konstantin Schmidt,Bayer Stefan,Christian Neukam,Bernd Edler,Christian Helmrich +8 more
- 15 Jul 2014
TL;DR: In this article, a spectral domain audio decoder was proposed for decoding an encoded audio signal, consisting of a spectral decoder for generating a first decoded representation of a first set of first spectral portions and a spectrum time converter for converting the first decoding representation and the reconstructed second spectral portion into a time representation.
16
Patent
Audio encoder, audio decoder and related methods using two-channel processing within an intelligent gap filling framework
Sascha Disch,Frederik Nagel,Geiger Ralf,Balaji Thoshkahna,Konstantin Schmidt,Bayer Stefan,Christian Neukam,Bernd Edler,Christian Helmrich +8 more
- 15 Jul 2014
TL;DR: In this article, an apparatus for generating a decoded two-channel signal, consisting of an audio processor (802), a parametric decoder (804), and a frequency regenerator (806) for regenerating a second spectral portion depending on a first spectral portion of the first set of first spectral portions.
13
Patent
Apparatus and method for encoding and decoding an encoded audio signal using temporal noise/patch shaping
Sascha Disch,Frederik Nagel,Geiger Ralf,Balaji Thoshkahna,Konstantin Schmidt,Bayer Stefan,Christian Neukam,Bernd Edler,Christian Helmrich +8 more
- 15 Jul 2014
TL;DR: In this article, an apparatus for decoding an encoded audio signal, consisting of a spectral domain audio decoder (602) for generating a first decoded representation of a first set of first spectral portions being spectral prediction residual values; a frequency regenerator (604) for reconstructing a reconstructed second spectral portion using a first spectral portion of the first set.
10
Patent
Encoder apparatus, decoder apparatus and methods of these
Tomofumi Yamanashi,Toshiyuki Morii,Hiroyuki Ehara +2 more
- 11 Nov 2010
TL;DR: In this paper, a band expanding technique for encoding, based on the spectral data of a lower frequency portion, is applied to a lower layer in a hierarchical encoding/decoding system, and an efficient encoding can be performed in an upper layer as well, thereby improving the decoded-signal quality.
10
Patent
Apparatus and method for decoding an encoded audio signal using a cross-over filter around a transition frequency
Sascha Disch,Geiger Ralf,Christian Helmrich,Frederik Nagel,Christian Neukam,Konstantin Schmidt,Michael Fischer +6 more
- 15 Jul 2014
TL;DR: In this paper, a core decoder (1400) is used for decoding an encoded audio signal comprising an encoded core signal, and a cross-over filter (1406) for spectrally crossover filtering the decoded core signal and a first frequency tile having frequencies extending from a gap filling frequency (309) to an upper border frequency.
7
References
Patent
Method for scalable encoding of media streams, a scalable encoder and a terminal
Teemu Parkkinen,Pasi Ojala +1 more
- 13 Jul 2001
TL;DR: In this article, a scalable encoder for encoding a media signal is described, which consists of first encoding means ( 210 ) for producing a first data stream, which is a core data stream relating to the media signal, having a first bit-rate; second encoding mean ( 230 ) for generating a second data stream and a multiplexer ( 110 ) for combining at least the first and second data streams into a third data stream.
157
Patent
Scalable audio encoding/decoding method and apparatus
Park Sung-Hee,Yeon-Bae Kim +1 more
- 12 Jun 1998
TL;DR: In this paper, a scalable audio encoding/decoding method and apparatus are provided, which includes the steps of time/frequency mapping input audio signals and quantizing the spectral data with the same scale factor for each predetermined scalefactor band, and packing the quantized data into bit streams.
107
Patent
Scalable coding method for high quality audio
Louis Dunn Fielder,Stephen Decker Vernon +1 more
- 04 Aug 2000
TL;DR: In this paper, a scalable data structure for audio transmission includes core and augmentation layers, the former for carrying a first coding of an audio signal that places post decode noise beneath a desired noise spectrum, the latter for carrying offset data regarding the desired noises spectrum and data about coding of the audio signal.
96
Overview of MPEG-4 audio and its applications in mobile communications
TL;DR: The paper discusses the technical provisions which make MPEG-4 audio very well suited for applications in the domain of mobile communications, including bitrate and bandwidth scalability.
80
Patent
Scalable decoding apparatus and scalable encoding apparatus
Hiroyuki Ehara,Masahiro Oshikiri,Koji Yoshida +2 more
- 02 Nov 2005
TL;DR: In this article, a scalable decoding apparatus capable of providing decoded audio signals of high quality having less degradation of a high frequency spectrum even when decoding audio signals by generating the high-frequency spectrum by use of a low frequency spectrum.
71
Related Papers (5)
Mineo Tsushima,Takeshi Norimatsu,Kosuke Nishio,Naoya Tanaka +3 more
- 07 Nov 2002
Masahiro Oshikiri,Hiroyuki Ehara,Koji Yoshida +2 more
- 02 Nov 2005
Naveen Thumpudi,Wei-ge Chen,Chao He +2 more
- 15 Jul 2005