Single-bit audio compressing, transmitting and reconstructing method assisted by superposition feature information
A feature information and audio compression technology, applied in voice analysis, instruments, etc., can solve the problems of increasing transmission costs and occupying spectrum resources
Active Publication Date: 2019-05-28
XIHUA UNIV
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Problems solved by technology
[0005] In order to solve the problems existing in the prior art, the present invention provides a single-bit audio compression transmission and reconstruction method assisted by superimposed feature information, which solves the problem of the support set information of the audio signal in the transmission process of the traditional single-bit compressed audio signal. Transmission will occupy a certain amount of spectrum resources, increase the cost of transmission, and effectively improve the reconstruction accuracy of audio signals
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[0067] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0068] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0069] Such as figure 1 As shown, the single-bit audio compression transmission and reconstruction method assisted by superimposing feature information, the method includes the following steps:
[0070] Step S1: Perform feature processing on the sparse audio signal to obtain feature information;
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The invention discloses a single-bit audio compressing, transmitting and reconstructing method assisted by superposition feature information. The single-bit audio compressing, transmitting and reconstructing method assisted by the superposition feature information comprises the following steps: S1, performing feature processing on a sparse audio signal to obtain feature information; S2, performingspectrum spreading processing on the feature information to obtain a spectrum-spread feature vector; S3, performing single-bit compression processing on the sparse audio signal to obtain a 1-bit compressed signal; S4, performing weighted superposition processing on the spectrum-spread feature vector and the 1-bit compressed signal to obtain a transmitting signal; S5, transmitting the transmittingsignal, and receiving the transmitting signal at a receiving end, wherein the received signal is a noisy signal; S6, restoring the noisy signal to obtain restored feature information and restored 1-bit compression information; S7, by a restored feature information assisted reconstruction algorithm, reconstructing the sparse audio signal. By the single-bit audio compressing, transmitting and reconstructing method assisted by the superposition feature information, the reconstructing precision of the single-bit audio signal is effectively improved under the condition that a spectrum resource ofa transmission system is not increased.
Description
technical field [0001] The invention relates to the field of audio compression transmission and reconstruction, in particular to a single-bit audio compression transmission and reconstruction method assisted by superimposed feature information. Background technique [0002] Compressed sensing (Compressed sensing, CS) technology has been widely used in the field of audio signal processing, and has made substantial progress. However, in practice, it is necessary to quantize the compressed signal before encoding it. In order to alleviate the pressure on the hardware of the AD converter, improve data storage efficiency and data transmission rate, single-bit compressed sensing is further applied to audio signal processing. [0003] However, existing single-bit compressed sensing reconstruction algorithms such as fixed point continuous FPC (Fixed Point Continuation, FPC) algorithm, symbol matching pursuit (Matching Sign Pursuit, MSP) algorithm, restricted step convergence (Restri...
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Inventor 卿朝进万东琴阳庆瑶蔡斌郭奕张岷涛
Owner XIHUA UNIV