A method for hiding audio error based on sine model

Abstract

The invention provides a method for using a sine model to conceal an audio mistake, which belongs to the network and communication field. The operation procedures include: 1. the rebuilding of the whole system is classified into four parallel instances according to the mistakes of a previous frame and a current frame: A. the previous frame and the current frame are both correct and return after being correctly decoded; B. the previous frame is correct and the current frame is wrong, then a time domain model is analyzed and synthesized, and a rebuilding frame is made by overlapping the odd symmetrical section of a synthesized frame and the residual even symmetrical section; C. the previous frame is wrong and the current frame is correct, then a rebuilding frame is made by overlapping the even symmetrical section of the synthesized frame obtained from the model analysis and the residual odd symmetrical section; D. both the previous frame and the current frame are wrong, then the current frame is treated in a simple way; 2. output the obtained decoding result or the wrongly concealed time domain rebuilding. The method is suitable for treatment under various frame loss rates, and the continuous frame loss probability is relatively small for the medium or low frame loss rates, while the medium or high frame loss rates are treated by using a simple frame loss strategy, which can not cause greater audio distortion.

Description

technical field [0001] The invention belongs to the field of networks and communications, in particular to a method for audio error concealment processing using a sinusoidal model. Background technique [0002] With the rapid development of wired and wireless networks, users have more and more needs for audio services through the Internet, including video conferencing, online music on demand, and IP telephony. However, although there is channel codec to realize error correction and error detection, it still cannot guarantee the quality of service (QoS) provided by Internet audio communication. In network communication, especially wireless network communication, due to multipath fading, noise interference and network Congestion and other reasons often cause digital audio compression data packet loss or compression data errors. Since the compressed audio data is very sensitive to burst errors, especially the error or loss of the frame header information of the compressed data...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that with the rapid development of network and communication, the traditional error correction mode occupies a large amount of bandwidth and causes a large delay that cannot meet the high real-time requirements. In view of these deficiencies, to achieve high-quality video and audio communication, a new processing method must be proposed innovatively. The purpose of this invention is a method for audio error concealment processing using a sinusoidal model. The characteristics of the added codec system, first analyze the established model, then extract the parameters of the analysis model for proper processing, and finally obtain an audio reconstruction frame, extract the appropriate part of the reconstruction frame and add the residual part, you can get reconstructed sequence

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