A kind of digital audiobeam loudspeaker is designed and implemented based on the 16-bit DSP chip TMS320VC5509A. The loud speaker system is composed of TMS320VC5509A, A/D converter, D/A converter, ultrasonic power amplifier and ultrasonic sensor array, etc. Approximate square root method is used to reduce the nonlinear distortion, and double side modulation with dynamic carrier algorithm is adopted to modulate the amplitude. All algorithms are implemented on a single chip TMS320VC5509A. The usage of double sampling and ping-pong structure can reduce the computation, thus providing more time for the realization of complex algorithms. The design has the advantages of excellent performance, low cost, high efficiency and easy maintenance and upgrade.
|Translated title of the contribution
|Digital directional loudspeaker based on TMS320VC5509A
|Number of pages
|Shuju Caiji Yu Chuli/Journal of Data Acquisition and Processing
|Published - 1 Nov 2012