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Broadband and narrow-band voice clarity improving device

A clarity and voice technology, applied in voice analysis, telephone communication, instruments, etc., can solve problems such as poor sound quality

Inactive Publication Date: 2015-12-30
VINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the sound quality in mobile phones is inferior to the sound quality in the music field using voice waveform coding technology. In particular, since the sampling frequency of 44.1Khz is used in the music field, it has higher sound quality than voice calls in mobile phones.

Method used

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  • Broadband and narrow-band voice clarity improving device
  • Broadband and narrow-band voice clarity improving device

Examples

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Embodiment Construction

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so as to help those skilled in the art to easily implement the present invention. However, the present invention can be implemented in various forms without being limited to the embodiments described here. In order to describe the present invention more clearly, the contents irrelevant to the description are omitted in the drawings, and the same reference numerals are attached to the same or similar structures throughout the specification.

[0022] Throughout the specification, when it is said that a certain part is "connected" to another part, it includes not only the case of "direct connection", but also the case of "indirect connection" between these parts through other elements. In the specification, when it is stated that a certain part "includes" a certain constituent element, unless there is a statement to the contrary, it means that other co...

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Abstract

The invention relates to a broadband and narrow-band voice clarity improving device in a mobile communication field. A cut-off frequency of a wave filter is automatically set according to the sampling frequency of an input signal. Voice frame level detection is performed on an input signal through an input enveloping line detecting part and the detected level is supplied to a cut-off frequency prediction part. Voice frame level detection is performed on an output signal and the detected level is supplied to the cut-off frequency prediction part. The cut-off frequency prediction part acquires a difference between the level of an N-th voice frame which is received from the input enveloping line detecting part and the level of an (N-1)th voice frame that is received from the output enveloping line detecting part, and furthermore utilizes the difference for calculating the cut-off frequency of a consonant component of the input signal. An oblique wave filter performs filtering on the input signal according to the cut-off frequency which is calculated by the cut-off frequency prediction part, and performs selective amplifying on the component which is predicated as the consonant component of the input signal.

Description

technical field [0001] The invention relates to a method and a device for improving the clarity of wideband and narrowband voice signals in the field of mobile communication. More specifically, when a voice call is made through a mobile communication system, the signal transmitted in the network is not affected by broadband or narrowband, and the parameter corresponding to the sampling frequency received in the terminal is automatically set, and passed through the vocoder The post-processing process of the signal improves the clarity of wideband and narrowband speech signals. Background technique [0002] In mobile phones, a vocoder (vocoder) is used to store or transmit voice signals or process them for other purposes. In mobile phones, the vocoder is to reduce the bit rate of the voice signal to be transmitted to improve frequency efficiency, and to sample the digital voice signal converted by A / D (AnalogtoDigital) to convert it into low bit rate data (that is, to compres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/725G10L21/0208H04M1/72454
CPCG10L19/26G10L21/0364G10L25/15
Inventor 朴晟镇
Owner VINE
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