Signal classifying method, classifying device and coding system

Abstract

The embodiment of the invention discloses a signal classifying method, a classifying device and a coding system. The signal classifying method comprises the steps of: obtaining an inputted high-frequency band input signal; confirming the signal type of the high-frequency band input signal according to the time domain characteristic parameter and / or the frequency domain characteristic parameter of the obtained high-frequency band input signal; and confirming the coding mode of the signal type. The classifying device comprises a receiving unit and a processing unit, wherein the receiving unit is used for obtaining the inputted high-frequency band input signal, and the processing unit is used for confirming the signal type of the high-frequency band input signal according to the time domain characteristic parameter and / or the frequency domain characteristic parameter of the obtained high-frequency band input signal and confirming the coding mode of the signal type. The embodiment further provides a coding system. The technical scheme of the invention can well subdivide and process the high-frequency band input signal to be better for coding and decoding the signal.

Description

technical field [0001] The invention relates to the field of voice and audio technology, in particular to a signal classification processing method, classification processing device and encoding system. Background technique [0002] In audio and speech processing technology, bandwidth extension technology has emerged, that is, to expand the frequency range of sound signals (such as audio signals or speech signals), mainly to expand those frequency bands that contain useful information or have a greater impact on auditory effects. In recent years, the rapid development of bandwidth expansion technology has enabled the commercial application of this technology in several fields, including enhancing the auditory effect of small woofers and enhancing the high frequency of audio and voice. [0003] Bandwidth extension technology generally uses a core encoder to encode the low-frequency band of the input signal with high precision at the encoding end, and for the high-frequency ba...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the calculation and quantization modes of the frequency-domain envelope and time-domain envelope of the high-band input signal are certain, so it is necessary to pre-set the encoder to a mode suitable for a certain type of input signal , such as a mode suitable for voice-type signals, which is beneficial to the encoding of voice-type signals, but the encoding effect for audio-type signals is poor

In addition, the types applicable in the prior art are only macroscopic type classifications, for example, more specific subdivision types in speech signals are not distinguished, such as transient types or harmonic types, etc. are not considered, thus resulting in It is impossible to perform better encoding according to the more subdivided type of the input signal, so as to obtain better encoding effect

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