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Method and device for handling lost frames

A technology of lost frames and number of lost frames, applied in the field of processing lost frames, which can solve the problems of discontinuous transition, noise of voice signals, etc.

Active Publication Date: 2016-12-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the frequency band extension technology is used, if the voice signal loses frames, the existing lost frame recovery method may cause discontinuous transition between the recovered lost frame and the preceding and following frames, resulting in noise in the voice signal

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  • Method and device for handling lost frames
  • Method and device for handling lost frames

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Embodiment Construction

[0101] 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.

[0102] In order to code a speech signal with a wider bandwidth when the code rate remains unchanged or does not change much, the frequency band extension technology is mainly used at present. The principle of frequency band extension technology is: the sending end divides the signal into two parts, high frequency band and low frequency band. info...

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Abstract

Embodiments of the present invention provide a method and device for processing lost frames. A method for processing lost frames includes: determining the initial high frequency band signal of the currently lost frame; determining the gain of the currently lost frame; determining the currently lost frame Gain adjustment information, the gain adjustment information includes at least one of the following: frame type, low frequency band signal spectrum tilt of the frame, low frequency band signal energy of the frame, number of consecutive lost frames, wherein the number of consecutive lost frames is up to the The number of frames lost continuously up to the current lost frame; adjust the gain of the current lost frame according to the gain adjustment information to obtain the adjusted gain of the currently lost frame; adjust the initial high frequency band according to the adjusted gain The signal is adjusted to obtain the high frequency band signal of the current lost frame. The method and device for processing lost frames provided by the embodiments of the present invention are used to improve the performance of audio signal lost frame recovery.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a method and device for processing lost frames. Background technique [0002] With the development of communication technology, users have higher and higher requirements on the quality of voice calls. The main method to improve the quality of voice calls is to increase the bandwidth of voice signals. If the traditional coding method is used to encode to increase the bandwidth of the voice signal, the code rate will be greatly increased, but increasing the code rate requires a larger network bandwidth to transmit the voice signal. Due to the limitation of the network bandwidth, simply increasing the code rate to increase the voice signal The signal bandwidth method is difficult to use in practical applications. [0003] In order to encode a speech signal with a wider bandwidth when the code rate remains unchanged or does not change much, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/005G10L21/02
CPCG10L19/005G10L21/02G10L19/24G10L19/0204G10L25/93G10L19/02G10L19/083G10L21/038G10L21/0388G10L2025/932
Inventor 王宾刘泽新苗磊
Owner HUAWEI TECH CO LTD
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