Audio conversion method and equipment
A technology of audio conversion and equipment, applied in the field of audio processing, which can solve the problems of changing the length of the original voice and difficulty in real-time transmission, and achieve the effect of small amount of calculation and real-time voice change
Inactive Publication Date: 2007-10-17
SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
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Another problem is that it will change the length of the original voice, making it difficult to transmit in real time during a call
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[0038] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.
[0039] As shown in Figure 1, an audio conversion device includes:
[0040] Data segment selection unit 10, which selects the first data segment and the second data segment from the audio segment;
[0041] a superposition unit 20, which superimposes the first data segment and the second data segment;
[0042] The sampling unit 30 samples the superimposed data;
[0043] The low-pass filter 40 performs low-pass filtering on the sampled data.
[0044] Wherein, the data segment selection unit 10 includes:
[0045] The data extraction unit 11 selects the first comparison data segment and the second comparison data segment from the audio segment;
[0046] A correlation calculation unit 12, which calculates the cross-correlation coefficient between the first comparison data segment and the s...
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The invention discloses an audio conversion method comprising following steps: a step one of selecting a first data segment and a second data segment from an audio segment; a step two of superposing the first data segment and the second data segment; a step three of sampling the superposed audio data; a step four of low pass filtering the sampled data. Also disclosed is an audio conversion device including: a data segment selection unit which selects the first data segment and the second data segment from the audio segment; a superposing unit which superposes the first data segment and the second data segment; a sampling unit which samples the superposed audio data; a low pass filter which performs low pass filtering on the sampled data. The operation quantity of the invention is very small, a high performance computing chip or a special DSP are not required, the invention only requires a 10 MIPS computing ability without changing an original vioce length, is suitable for real-time call and capable of realizing real-time voice conversion on a mobile terminal with a finite computing ability and internal memory.
Description
technical field [0001] The present invention relates to an audio processing method and equipment, in particular to a method and equipment for converting the fundamental frequency of audio Background technique [0002] Modifying the fundamental frequency can change the characteristics of the voice, so that the listener cannot recognize the identity of the speaker and achieve the effect of voice change. At present, the methods for changing the fundamental frequency include Fourier transform frequency domain migration method, SOLA (synchronized Overlap and Add) algorithm, hybrid harmonic random algorithm, etc. However, these methods have a large amount of calculation, and real-time implementation requires a high-performance computer or a dedicated DSP, which increases the cost of the terminal equipment. Another problem is that it will change the length of the original voice, causing difficulties in real-time transmission during a call. Contents of the invention [0003] The...
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IPC IPC(8): G10L21/00G10L21/0208
Inventor 王卫华
Owner SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD