Audio signal processing method, system and audio signal transmitting/receiving device

Abstract

The invention discloses an audio signal processing method and system, and a transceiver device of audio signals. At the transmitting end of audio signals, the residue signals and mask threshold signals obtained by the processing of audio signals are respectively coded to residue signals multiple description and multiple description; and every residue signal description and one path of multiplex mask threshold signal description are combined to form a multiplex description that contains the residue signals and mask threshold signals. At the receiving end of the audio signals, the residue signal description and the mask threshold signal description contained in every one of the descriptions received are decommuted, all residue signal descriptions created after decommutation are decoded to one path of residue signals, and then all mask threshold signals created after decommutation are decoded to one path of mask threshold signals. The invention can effectively enhance audio quality in the process of communication and enhance user satisfaction degree.

Description

technical field [0001] The present invention relates to the communication field, in particular to an audio signal processing method, system, and audio signal transceiving device. Background technique [0002] With the rapid development of communication technology, the channel bandwidth and transmission rate have been greatly improved, and the processing capabilities of network equipment and communication terminals have also been continuously enhanced; at the same time, various audio coding algorithms have been considerably improved in coding quality and coding efficiency. This makes real-time high-quality audio services rapidly merged into various modern communication systems. However, in actual operation, due to reasons such as network congestion, channel interference and noise, communication networks based on packet switching inevitably face the problems of packet loss and long delay, which leads The quality of audio signals transmitted by mobile communication systems wil...

AI Technical Summary

Problems solved by technology

[0007]1. Only when receiving the base layer multi-description coded bit stream from the source, the receiver can perform normal decoding; once the base layer multi-description coded bit stream If packet loss occurs in the stream, the receiving end will not be able to perform the decoding process normally;

[0008]2. When the receiving end only receives the enhancement layer multi-description coded bit stream, it can only recover part of the enhancement layer information from the information source, and cannot reconstruct the information from the information source. main information of

[0009]3. In order to enable the receiving end to normally receive the multi-descriptive coded bit stream of the basic layer, and to prevent bit errors or packet loss, the basic Multiple layers describe the coded bit stream for forward error correction or packet loss retransmission processing; this will significantly reduce communication efficiency and increase communication delay;

[0010]4. Since the source is layered according to priority, each layered coded bit stream generated will also have different priority, and the low priority The correct decoding of the layered coded bit stream must be based on the correct decoding of the high priority layered coded bit stream; when there is a problem in the decoding process of the high priority layered coded bit stream, the correct decoding of the low priority layered coded bit stream Decoding is out of the question

[0014]1. The second audio signal processing method mainly adopts time-domain prediction and time-domain coding methods, the frequency resolution is low, and the auditory irrelevance cannot be removed well and the correlation between the frequency components of the audio signal;

[0015]2. The signal processed by the psychoacoustic model is only transmitted to the receiving end as side information, not as a part of the description code; so once the psychoacoustic If the parameters in the model are lost, the receiving end will not be able to correctly decode the received audio signal, so the anti-packet loss performance is poor

[0016] To sum up, since the second audio signal processing method only uses the psychoacoustic model with poor anti-packet loss performance as the basis of audio signal processing, it improves communication The reliability of the audio quality in the process is low, and the problem of audio quality degradation in the communication process caused by packet loss and delay cannot be effectively reduced; moreover, the audio quality degradation will significantly reduce user satisfaction

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