Sound mixing method and sound mixing circuit

Sound mixing method and sound mixing circuit

  • CN 106,412,767 B
  • Filed: 11/29/2016
  • Issued: 03/31/2020
  • Est. Priority Date: 11/29/2016
  • Status: Active Grant
First Claim
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1. A mixing circuit, characterized in that, the mixing circuit at least includes an application processor unit, a pulse code modulation digital-to-analog converter, a target digital-to-analog converter and a hardware mixing processing unit, the application processor unit is connected with the pulse code modulation digital-to-analog converter, the application processor unit is connected with the target digital-to-analog converter, the target digital-to-analog converter is connected with the hardware mixing processing unit, the pulse code modulation digital-to-analog converter is connected with the hardware mixing processing unit, wherein:

  • the application processor unit is used for receiving target data and pulse code modulation data, wherein the target data is data which encapsulates direct bit stream digital data and can be transmitted by using the direct bit stream digital data and the pulse code modulation data together in the same transmission channel, the target data comprises DOP data, and the DOP data has header information;

    the application processing unit distinguishes DOP data and pulse code modulation data through the header information, the data with the header information is DOP data, and the data without the header information is pulse code modulation data;

    after identifying the DOP data, the application processing unit transmits the DOP data to the target digital-to-analog converter;

    after the application processing unit identifies the pulse code modulation data, the pulse code modulation data are transmitted to the pulse code modulation digital-to-analog converter;

    the target digital-to-analog converter is used for de-encapsulating the target data to obtain the direct bit stream digital data and converting the direct bit stream digital data into a first analog signal;

    the pulse code modulation digital-to-analog converter is used for converting the pulse code modulation data into a second analog signal;

    the hardware sound mixing processing unit is used for mixing the first analog signal and the second analog signal;

    the sound mixing circuit further comprises a first output impedance unit and a second output impedance unit;

    the first output impedance unit is used for determining the mixing proportion of the first analog signal as a first proportion;

    the second output impedance unit is used for determining the mixing proportion of the second analog signal to be a second proportion;

    the hardware sound mixing processing unit is specifically configured to mix a first analog signal with a sound mixing ratio of the first ratio and a second analog signal with a sound mixing ratio of the second ratio.

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