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Registered APPARATUS AND METHOD OF ENHANCING QUALITY OF SPEECH CODEC

양자화 잡음 억제로 인한 음성 코덱의 품질 향상
이미지 확대
Inventors
Lee Mi Suk, Do Young Kim, Lee Byung Sun
Application No.
13613792 (2012.09.13)
Publication No.
20130066627 (2013.03.14)
Registration No.
9142222 (2015.09.22)
Country
UNITED STATES
Project Code
07MT2600, Development of Multi-codec and its Control Technology Providing Variable Bandwidth Scalability, Do Young Kim
Abstract
An apparatus and method of improving the quality of a speech codec are provided. In the method, a first energy of a signal decoded by a low-band codec is calculated, and a second energy of a signal decoded by a low-band enhancement mode is calculated. Then, when the first energy is less than a first threshold value or less than a product of the second energy and a second threshold value, a size of the decoded signal is scaled. Accordingly, generation of a quantization error with respect to a silence segment is reduced.
KSP Keywords
Quantization error, Threshold Value, enhancement-mode, low-band, speech codec
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패밀리 특허 목록
Status Patent Country KIPRIS
Registered 음성코덱의 품질향상장치 및 그 방법 KOREA
Registered 음성코덱의 품질향상장치 및 그 방법 KOREA KIPRIS
Registered APPARATUS AND METHOD OF ENHANCING QUALITY OF SPEECH CODEC UNITED STATES
Registered APPARATUS AND METHOD OF ENHANCING QUALITY OF SPEECH CODEC UNITED STATES
Registered Quality enhancement of speech codec by suppressing the quantization errors JAPAN
Registered Quality enhancement of speech codec by suppressing the quantization errors JAPAN
Registered APPARATUS AND METHOD OF ENHANCING QUALITY OF SPEECH CODEC JAPAN
Registered APPARATUS AND METHOD OF ENHANCING QUALITY OF SPEECH CODEC CHINA