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Acoustic signal encoding method and apparatus, acoustic signal decoding method and apparatus, and recording medium

A technology of encoding method and decoding method, which is applied in the directions of digital recording/reproduction, code conversion, speech analysis, etc., and can solve problems such as multi-bit and lower encoding efficiency

Inactive Publication Date: 2003-12-31
SONY CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

As a result, more bits are required, thus reducing coding efficiency

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  • Acoustic signal encoding method and apparatus, acoustic signal decoding method and apparatus, and recording medium
  • Acoustic signal encoding method and apparatus, acoustic signal decoding method and apparatus, and recording medium
  • Acoustic signal encoding method and apparatus, acoustic signal decoding method and apparatus, and recording medium

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Embodiment Construction

[0050] Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0051] figure 2 Shows the schematic structure of an embodiment of the acoustic signal coding device of the present invention, wherein an acoustic signal coding device 100 is shown, which includes a sound noise inspection unit 110, a sound component coding unit 120, a residual component coding unit 130 , a code string generating unit 140 and a time domain signal holding unit 150 .

[0052] The sound noise checking unit 110 checks whether the input acoustic time-domain signal S is a sound signal or a noise signal, so as to output a sound / noise checking code T / N according to the checking result to enable and disable downstream processing.

[0053] The sound component coding unit 120 extracts the sound component from the input signal, so that the sound component signal is encoded, and it includes a sound component extraction unit 1...

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Abstract

In an acoustic signal encoding apparatus ( 100 ), a tonal noise verification unit ( 110 ) verifies whether the input acoustic time-domain signals are tonal or noisy. If the input acoustic time-domain signals are tonal, tonal component signals are extracted by a tonal component extraction unit ( 121 ), and tonal component parameters are normalized and quantized in a normalization / quantization unit ( 122 ). The residual time-domain signals, obtained on extracting the tonal component signals from the acoustic time-domain signals, are transformed by an orthogonal transforming unit ( 131 ) into the spectral information, which spectral information is normalized and quantized by a normalization / quantization unit ( 132 ). A code string generating unit ( 140 ) generates a code string from the quantized tonal component parameters and the quantized residual component spectral information.

Description

technical field [0001] The present invention relates to a method and a device for encoding an acoustic signal, and a method and a device for decoding an acoustic signal, wherein the acoustic signal is encoded and transmitted or recorded on a recording medium, or the encoded acoustic signal is The decoding side is received or reproduced and decoded. The present invention also relates to an acoustic signal encoding program, an acoustic signal decoding program, and a recording medium recorded with code strings encoded by the acoustic signal encoding device. Background technique [0002] Many techniques exist for efficiently encoding digital audio signals or speech signals. Examples of these techniques include sub-band coding (SBC), which for example splits a time-domain audio signal into multiple frequency bands, and as a non-blocking band-splitting system, which does not block the time-domain signal, i.e. from Coding a signal from one frequency band to another; as a grouped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/02G11B20/10H03M7/30
CPCG10L19/032G10L25/93G10L19/087G10L19/20G10L19/02G11B20/10
Inventor 迁实铃木志朗东山惠佑
Owner SONY CORP
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