Method for embedding and acquiring sound source orientation information and audio coding decoding method and system

Abstract

The invention discloses a method for embedding sound source orientation information into code stream, an audio frequency data compression coding method, an audio frequency data decoding method, an audio frequency data compression coding decoding method and an audio frequency data compression coding decoding system. The invention can add sound source orientation information after being coded into the heading syntax structure of audio frequency mono channel data code stream, thus realizing that sound source orientation information is embedded into code stream, so that the sound source orientation information is transmitted along with code stream. Thus, when the technical scheme of the invention is applied to monitoring scene, no multi-channel audio frequency data code stream is required to be transmitted or stored between monitoring front end and monitoring rear end, the problem that accurate sound source orientation information is difficult to acquire at the monitoring rear end as multi-channel audio frequency data code stream is output at the monitoring front end is avoided, and transmission bandwidth or storage space can be ensured to be appropriate in transmission or storage of multi-channel audio frequency data code stream.

Description

technical field [0001] The present invention relates to audio data encoding and decoding technology, in particular to a method for embedding sound source orientation information in a code stream, a method for obtaining sound source orientation information from a code stream, and also relates to an audio compression encoding and decoding method and An audio compression codec system. Background technique [0002] In some existing monitoring scenarios, the microphone array is usually used to collect audio multi-channel data at the front end of the monitoring, and then the microphone array algorithm is used to denoise and locate the audio multi-channel data to obtain the audio mono data and sound source orientation information. [0003] After that, based on the existing audio compression coding standard, the audio mono data can be compressed and coded, and a code stream can be generated and transmitted to the monitoring backend, and then played after being decoded by the monito...

AI Technical Summary

Problems solved by technology

[0006] However, since the phase relationship of each channel in the multi-channel audio data will be destroyed in the compression encoding process of the monitoring front-end, the monitoring back-end cannot obtain accurate sound source localization information, and the multi-channel audio after compression encoding The transmission or storage of data between the monitoring front-end and the monitoring back-end will also occupy a large amount of transmission bandwidth or storage space

[0007] It can be seen that the existing technology cannot realize the transmission of sound source directional information along with the code stream, so the code stream of multi-channel audio data has to be transmitted or stored, and it is difficult to obtain accurate sound source directional information based on the code stream of multi-channel audio data. And take up a lot of transmission bandwidth or storage space

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