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.
CN103971693AActive Publication Date: 2014-08-06HUAWEI TECH CO LTD
9 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2014-08-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More