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Method and apparatus for audio signal classification

A technology for audio signal and signal recognition, applied in speech analysis, speech recognition, instruments, etc., can solve problems such as not suitable for communication equipment

Inactive Publication Date: 2012-06-13
NOKIA TECHNOLOGLES OY
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  • Abstract
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  • Claims
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Problems solved by technology

However, such a processing-intensive approach is not suitable for communication devices, especially portable devices where processing power comes at the expense of power consumption and cost

Method used

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  • Method and apparatus for audio signal classification
  • Method and apparatus for audio signal classification
  • Method and apparatus for audio signal classification

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Embodiment Construction

[0062] Suitable means and possible mechanisms for providing identification or classification of received downlink audio signals as containing speech or music are described in more detail below. In this regard, first refer to figure 1 , which shows a schematic block diagram of an exemplary apparatus or electronic device 10 that identifies maximum and minimum Root Mean Square (RMS) values ​​over several frames from a low-pass filtered signal. In such devices, in order to improve the robustness in terms of noise, a background noise estimator is implemented for detecting situations where the noise makes recognition impossible. A device thus described may have three main advantages. First, the device can be targeted to prioritize voice to produce low false positive music detections. Second, the device can be operated to take noise levels into account. Third, due to the relative simplicity and low complexity of the scheme and the means required to implement it, the means can be i...

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Abstract

An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform determining a signal identification value for an audio signal, determining at least one noise level value for the audio signal, comparing the signal identification value against a signal identification threshold and each of the at least one noise level value against an associated noise level threshold, and identifying the audio signal dependent on the comparison.

Description

technical field [0001] The invention relates to a device for classifying audio signals. The invention further relates to, but is not limited to, an arrangement for a mobile device. Background technique [0002] In many applications, there is a strong interest in identifying and classifying audio signals. One such classification is automatic recognition when an audio signal is a speech audio signal, a music audio signal, or silence. Although the human ear can easily differentiate between speech and music audio signals, for example by listening to a short segment for a few seconds, automatic identification or differentiation has been found to be a technically difficult problem. [0003] Such identification of whether an audio signal is music or speech is particularly beneficial in wireless communication system devices. Audio signal processing within a device in a wireless communication system may implement different encoding and decoding algorithms on a signal depending on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L11/02G10L25/78
CPCG10L25/78H04R29/00G10L15/20G10H2240/251G10H2210/046
Inventor J·V·T·劳哈拉
Owner NOKIA TECHNOLOGLES OY
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