Method and arrangement for phoneme signal duplicating, decoding and synthesizing
A voice decoding and voice technology, which is applied in the fields of duplicating voice signals, decoding voice, synthesizing voice and devices, can solve problems such as complex structure and increased cost, and achieve the effect of speed control, speed control and high quality.
Inactive Publication Date: 2006-07-12
SONY CORP
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Problems solved by technology
However, with the usual speech decoding method, the decoded speech must use pitch control to change the pitch, making the structure complicated and increasing the cost
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[0037] Referring to the accompanying drawings, the speech signal duplication method and apparatus according to the preferred embodiment of the present invention will be described below. The present embodiment relates to a speech signal duplication device 1 for duplicating a speech signal according to coding parameters. These coding parameters are to segment an input speech signal on the time axis according to a predetermined number of frames as a coding unit, and divide the split input speech signal into coded, as shown in Figure 1.
[0038] The speech signal duplication device 1 includes an encoding unit 2 for encoding a speech signal entered at an input terminal 101 according to a frame as a unit, which outputs, for example, linear predictive coding (LPC) parameters, line spectral pair (LSP) parameters, pitch, voiced sound (V ) / unvoiced sound (UV) or spectral amplitude Am and other encoded parameters, and includes a period modification unit 3 that compresses the output perio...
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A method for reproducing speech signals at a controlled speed whereby an encoding unit discriminates whether an input speech signal is voiced or unvoiced. Based on the results of discrimination, the encoding unit performs sinusoidal synthesis and encoding for a signal portion found to be voiced, while performing vector quantization by closed-loop search for an optimum vector for a portion found to be unvoiced using an analysis-by-synthesis method, in order to find encoded parameters. The decoding unit compands the time axis of the encoded parameters obtained every pre-set frames at a period modification unit for modifying the output period of the parameters for creating modified encoded parameters associated with different time points corresponding to the pre-set frames. A speech synthesis unit synthesizes the voiced speech portion and the unvoiced speech portion. An encoded bit stream or encoded data is outputted by an encoded data outputting unit. A waveform synthesis unit synthesizes the speech waveform.
Description
technical field [0001] The present invention relates to a method and a device for duplicating a speech signal at a controlled speed, a method and a device for decoding a speech signal and a method and a device for synthesizing a speech signal, wherein pitch conversion can be realized by a simplified structure. The invention also relates to portable radio terminal equipment for transmitting and receiving pitch-converted speech signals. Background technique [0002] Various encoding methods are known hitherto for encoding audio signals (including speech and acoustic signals) which compress the signal using the statistical properties of these signals in the time domain and in the frequency domain and the psychoacoustic characteristics of the human ear. These coding methods can be roughly classified into time-domain coding, frequency-domain coding, and analysis / synthesis coding. [0003] Examples of efficient coding of speech signals include sinusoidal analysis coding such as h...
Claims
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Login to View More IPC IPC(8): G10L13/02G10L21/04G10L19/00G10L19/04G10L13/00G10L19/038G10L19/093G10L19/16G10L19/20G10L25/93H03M7/30
CPCG10L13/033G10L19/087G10L21/01G10L2019/0012G10L19/04G10L13/02
Inventor 饭岛和幸西口正之松本淳大森士郎
Owner SONY CORP