Forecasting method for high-frequency band signal, encoding device and decoding device

A prediction method and high-band technology, applied in the field of communication, can solve the problems of poor high-band signal quality and degraded audio signal hearing quality, etc.

Active Publication Date: 2014-08-06
HUAWEI TECH CO LTD
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Problems solved by technology

[0008] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: the quality of the predicted

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  • Forecasting method for high-frequency band signal, encoding device and decoding device
  • Forecasting method for high-frequency band signal, encoding device and decoding device
  • Forecasting method for high-frequency band signal, encoding device and decoding device

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[0086] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0087]In the field of digital signal processing, audio codecs and video codecs are widely used in various electronic devices, such as: mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators , Cameras, Audio / Video Players, Camcorders, Video Recorders, Surveillance Equipment, etc. ...

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Abstract

A prediction method and a coding/decoding device for a high frequency band signal. The method comprises: acquiring a signal type of an audio signal and a low frequency band signal (100); the audio signal comprises the low frequency band signal and a high frequency band signal; acquiring a frequency domain envelope of the high frequency band signal on the basis of the signal type (101); predicting an excitation signal of the high frequency band signal on the basis of the low frequency band signal (102); and, restoring the high frequency band signal on the basis of the frequency domain envelope of the high frequency band signal and of the excitation signal of the high frequency band signal. The method and device allow for effective reduction in errors found between the high frequency band signal acquired by prediction and an actual high frequency band signal, and increases the accuracy of the predicted high frequency band signal.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a method for predicting a high frequency band signal and an encoding / decoding device. Background technique [0002] In the field of digital communication, the transmission of voice, image, audio, and video has a very wide range of application requirements, such as mobile phone calls, audio and video conferences, radio and television, and multimedia entertainment. In order to reduce the resources occupied in the process of audio and video signal storage or transmission, audio and video compression coding technology emerges as the times require. In the development of audio and video compression coding technology, many different technical branches have emerged. Among them, the technology of transforming the signal from the time domain to the frequency domain and then encoding it, also known as the transform domain coding technology, has good c...

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Application Information

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IPC IPC(8): G10L19/04G10L19/032
CPCG10L21/02G10L19/04G10L19/20G10L21/038G10L19/08G10L19/16
Inventor 刘泽新苗磊齐峰岩
Owner HUAWEI TECH CO LTD
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