Patent
Digital audio signal coding using a CELP coder and a transform coder
Gilad Cohen,Yossef Cohen,Doron Hoffman,Hagai Krupnik,Aharon Satt +4 more
- 04 Mar 1998
148
TL;DR: In this paper, a method for adaptively switching between transform audio coder and CELP coder, which makes use of the superior performance of cELP coders for speech signal coding, while enjoying the benefits of transform coder for other audio signals.
read more
Abstract: Apparatus is described for digitally encoding an input audio signal for storage or transmission. A distinguishing parameter is measure from the input signal. It is determined from the measured distinguishing parameter whether the input signal contains an audio signal of a first type or a second type. First and second coders are provided for digitally encoding the input signal using first and second coding methods respectively and a switching arrangement directs, at any particular time, the generation of an output signal by encoding the input signal using either the first or second coders according to whether the input signal contains an audio signal of the first type or the second type at that time. A method for adaptively switching between transform audio coder and CELP coder, is presented. In a preferred embodiment, the method makes use of the superior performance of CELP coders for speech signal coding, while enjoying the benefits of transform coder for other audio signals. The combined coder is designed to handle both speech and music and achieve an improved quality.
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
Speech processing system
TL;DR: In this article, a system for allowing a user to add word models to a speech recognition system is described. But this system requires the user to input a number of renditions of a new word and generate from these a sequence of phonemes representative of the new word.
166
Patent
Method and an apparatus for processing an audio signal
Hyen O Oh,Yang Won Jung +1 more
- 29 Jul 2009
TL;DR: In this article, an apparatus for processing an audio signal and method thereof is described, which includes receiving, by an audio processing apparatus, a signal including a first data of a first block encoded with rectangular coding scheme and a second data of the second block encoded in non-rectangular coding scheme.
136
Patent
A method and an apparatus for processing an audio signal
Hyen O Oh,Yang Won Jung +1 more
- 31 Dec 2008
TL;DR: In this article, an apparatus for processing an audio signal and method thereof is described, which includes a signal receiving unit a plurality of preset informations and preset attribute information; a display unit displaying preset metadatas, a preset mode input unit being inputted a select signal selecting one preset metadata; a presetmode select unit selecting the preset metadata and a preset information based on the select signal.
134
Patent
Multi-resolution switched audio encoding/decoding scheme
Max Neuendorf,Stefan Bayer,Jeremie Lecomte,Guillaume Fuchs,Julien Robilliard,Nikolaus Rettelbach,Frederik Nagel,Ralf Geiger,Markus Multrus,Bernhard Grill,Philippe Gournay,Redwan Salami +11 more
- 06 Dec 2012
TL;DR: In this paper, a signal analyzer for analyzing the audio signal is provided, which determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded message from a second encoding branch.
128
Method for coding speech and music signals
TL;DR: In this article, a transform coding method for music signals was proposed, which is suitable for use in a hybrid codec, whereby a common linear predictive (LP) synthesis filter was employed for both speech and music signals.
126
References
Speech coding system and method using voicing probability determination
TL;DR: A modular system and method is provided for encoding and decoding of speech signals using voicing probability determination and the use of the system in the generation of a variety of voice effects.
151
Method and apparatus for efficient multiband celp wideband speech and music coding and decoding
Anil Wamanrao Ubale,Allen Gersho +1 more
TL;DR: In this article, a method of digitally compressing speech and music by use of multiple band fixed excitations stored in codebooks was proposed, along with a coupling method for interconnecting the excitation codebooks and adaptive codebooks, and for generating the composite excitation signal.
90
Patent
Multirate digital voice communication processor
George S. Kang,Lawrence J. Fransen,Evans L. Kline +2 more
- 28 Jan 1980
TL;DR: In this paper, a multirateigital processor generates a data frame of 216 bits representing sync and voice encoded at both rates, with the 2.4 Kb/s embedded as a subset within the frame.
61
Patent
Method and device for coding a voice signal
Claude Galand,Khamphuc Daulasim +1 more
- 18 Nov 1983
TL;DR: In this article, the residual signal is split over several sub-bands and the contents of each sub-band is dually coded by using a process including a simultaneous direct BCPCM and differential APC coding with dynamic assignment of the quantizing bits according to the relative subband contents, which simultaneous coding is followed by a dynamic choice of the subband coded output providing the lowest coding error.
51
Patent
Transform domain quantization technique for adaptive predictive coding
Bangalore R. R. U. Bhaskar
- 25 Oct 1990
TL;DR: In this article, a residual signal quantization technique used in the adaptive predictive coding of speech signals is based in the frequency domain and the number of bits used to quantize each frequency coefficient is determined by an estimate of the power of the input signal at that frequency, and the quantization noise power spectrum is shaped, and can be selectively shaped so as to form a desired reconstruction noise power distribution.
47