Voice spectrum analyzing system based on field programmable gate array (FPGA)

• Main Authors: TAO ZHONGXING, SUN HONGYING, LUO BAOLONG, YANG HONGWU, WANG QUANZHOU, PEI HUIXIN, YUAN LEMIN, PEI DONG
• Format: Patent
• Language: Chinese; English
• Published: 27.07.2011
• Subjects: ACOUSTICS; MUSICAL INSTRUMENTS; PHYSICS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

The utility model relates to a voice spectrum analyzing system based on a field programmable gate array (FPGA), which comprises an audio-frequency analog-to-digital converter (ADC) chip, an FPGA chip and a visual-frequency digital-to-analog converter (DAC) chip which are sequentially connected, wherein the FPGA chip and the visual-frequency DAC chip are respectively connected with a video graphics array (VGA) display; the FPGA chip comprises a VGA controller, a voice signal collection control module, a data register, a short-time Fourier transformation module, an amplitude-spectrum nonlinear mapping module, a display register and a red, green and blue (RGB) palette module, wherein the voice signal collection control module, the data register, the short-time Fourier transformation module, the amplitude-spectrum nonlinear mapping module, the display register and the RGB palette module are sequentially connected; the VGA controller and the RGB palette module are respectively connected with the visual-frequency D