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Sound wave information decoding method and device

A decoding method and a technology of a decoding device, which are applied in the field of sound wave signal decoding, and can solve problems such as low computing speed and long time consumption

Pending Publication Date: 2020-10-23
BEIJING SOUNDBUS TECH CO LTD
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Problems solved by technology

[0006] When using an interpreted language (such as Python / JavaScript / Perl / Shell, etc.) to perform sound wave decoding on the audio quantized and compressed data stream, because the program is running, it must first be translated into intermediate code, and then the interpreter will interpret the intermediate code Run, translate once every time it is executed, the operation speed is low, and it takes a long time

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  • Sound wave information decoding method and device
  • Sound wave information decoding method and device

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Embodiment Construction

[0027] See figure 1 , Is a schematic flowchart of an acoustic signal decoding method in an embodiment of the present invention, and the method includes:

[0028] Step S10: Perform real-time decompression processing on the audio quantized compressed data stream to be decoded to generate one or more continuous quantized data blocks Z x . Among them, x is the serial number of the data block, and x=1, 2, 3,.... The original audio signal is quantized and compressed to generate the audio quantized compressed data stream. The original audio signal is superimposed with one or more sound wave signals in advance, and each sound wave signal is composed of m unit signals spliced ​​in consecutive m time sequences. Each unit signal is composed of n bit signals superimposed on the same time sequence, and m and n are preset natural numbers.

[0029] The original audio signal is quantized and compressed through different encoding algorithms to obtain the corresponding audio quantized compressed da...

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Abstract

The invention discloses a sound wave information decoding method and device, and the method comprises the steps: carrying out the real-time decompression of a to-be-decoded audio quantized compresseddata stream, so as to generate one or more continuous quantized data blocks Zx, respectively selecting n quantized numerical values with the same frequency or the most approximate frequency corresponding to the n bit signal frequencies from each quantized data block Zx, and forming quantized data by the obtained n*x quantized numerical values, carrying out quantized reduction on each piece of quantized data to obtain corresponding energy data, carrying out inverse discrete cosine transform processing on each piece of energy data to obtain amplitude data, and carrying out sound wave signal decoding on the amplitude data to obtain corresponding sound wave data. By utilizing the method and the device, the operation speed of performing acoustic decoding on the audio quantized compressed data stream by the interpretive language can be remarkably improved.

Description

Technical field [0001] The present invention relates to the technical field of communication coding, in particular to a method and device for decoding acoustic wave signals. Background technique [0002] Audio quantization compression is an audio compression technology that uses audio quantization processing. Quantization refers to the process of approximating the continuous value of the signal (or a large number of possible discrete values) to a finite number of (or fewer) discrete values, that is, converting the sampled analog signal into a digital signal by rounding The process of signal; audio compression is the application of appropriate digital signal processing technology to the original digital audio signal stream (PCM encoding) to reduce (compress) its code rate without losing useful information or introducing negligible loss. Also known as compression coding, where the audio signal may introduce a lot of noise and certain distortion after passing through a codec system...

Claims

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Application Information

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IPC IPC(8): G10L19/02G10L19/032H03M7/40
CPCG10L19/02G10L19/032H03M7/40
Inventor 唐鸿
Owner BEIJING SOUNDBUS TECH CO LTD
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