ambe2000 control system and control method

Abstract

The invention discloses an AMBE2000 control system, comprising an analog / digital converter, an AMBE2000 encoder, an FPGA, an AMBE2000 decoder, and a digital / analog converter; Multiplexing, receiving configuration signals during configuration, and receiving normal decoded data (channel code stream) after configuration, thus greatly simplifying the timing control of AMBE2000; at the same time, the invention also discloses a control method of AMBE2000, which controls the configuration clock and The data is processed to determine whether the configuration is completed, so as to switch the chip pins. This method is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of speech compression algorithms, in particular to an AMBE2000 control system and a control method. Background technique [0002] In the mid-1980s, Lincoln Laboratory of the United States proposed a multi-band excitation (MBE) speech coding scheme. This algorithm breaks through the limitation of binary excitation, divides the speech spectrum into several sub-bands according to the fundamental harmonic frequency, and judges whether the signal of each sub-band is voiced or unvoiced (V / U judgment), so as to decide which excitation source to use A composite signal for the subbands is generated, and the composite signals for the individual subbands are summed to generate a full-band composite speech signal. Using this method, it is possible to synthesize speech of much better quality than conventional vocoders at low rates. [0003] DVSI developed the Advanced Multi-Band Excited (AMBE) algorithm based on the or...

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Problems solved by technology

[0004] However, using the AMBE2000 chip to implement the AMBE algorithm has the disadvantage of complex timing control, which limits its promotion to a certain extent.

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