Patent
Information signal encoding
Jens Hirschfeld,Gerald Schuller,Manfred Lutzky,Ulrich Krämer,Stefan Wabnik +4 more
- 28 Feb 2007
27
TL;DR: In this paper, a very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the pre-trained signal.
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Abstract: A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.
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Citations
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Yang Gao
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TL;DR: In this paper, a method for decoding a decoded audio signal that has a transmitted pitch lag is disclosed, which includes estimating pitch correlations of possible short pitch lags that are smaller than a minimum pitch limitation and have an approximated multiple relationship with the transmitted pitch delay, and selecting a short pitch lag as a corrected pitch lag if a corresponding pitch correlation is large enough.
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TL;DR: In this article, a hierarchical coding method for hierarchical coding of a digital audio signal comprising of a core coding and an enhancement coding is presented. But the coding method can also include a shaping of the coding noise for the core bitrate coding.
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Yang Gao
- 04 Sep 2009
TL;DR: In this article, a method of receiving an audio signal includes measuring a periodicity of the audio signal to determine a checked periodicity, and at least one best available subband is determined.
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TL;DR: In this article, a method of compressing digital image data is provided that includes selecting an entropy code for encoding a line of pixels and selectively encoding the pixel residual using one of the entropy codes or run mode encoding.
33
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Patent
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TL;DR: In this article, the authors propose an apparatus for scalable encoding a spectrum of a signal including audio and/or video information, with the spectrum comprising binary spectral values, including a means for generating a first sub-scaling layer and a second sub-scale layer in addition to forming the encoded signal.
101
Patent
Sub-band voice codec with multi-stage codebooks and redundant coding
Tian Wang,Kazuhito Koishida,Hosam A. Khalil,Xiaoqin Sun,Wei-ge Chen +4 more
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TL;DR: In this article, techniques and tools related to coding and decoding of audio information are described, as well as tools and techniques related to decoding audio information, such as redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame.
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Patent
Speech decoding using mix ratio table
Seishi Sasaki
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TL;DR: In this paper, an encoder applies the non-uniform quantization to the period of the aperiodic pitch in accordance with its frequency of occurrence, and the result of the nonlinear quantization is transmitted together with the quantization results of the unvoiced state and the periodic pitch as one code.
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