External extended device and audio playback method

  • US 10,839,782 B2
  • Filed: 06/29/2017
  • Issued: 11/17/2020
  • Est. Priority Date: 07/07/2016
  • Status: Active Grant
First Claim
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1. An external device, configured to receive power supplied by a television device and a signal transmitted by the television device, the external device comprising:

  • a USB 3.0 plug for connecting the external device to the television device, wherein a first set of pins of the USB 3.0 plug constitute an Inter-IC Sound (I2S) subinterface configured to transmit an I2S signal;

    a sound-mixing processing chip electrically connected with the USB 3.0 plug and configured to;

    acquire an accompaniment audio signal transmitted by the television device via the I2S subinterface;

    perform sound-mixing processing on a user voice signal gathered by a microphone device and the accompaniment audio signal to produce a sound-mixed signal; and

    transmit the sound-mixed signal to a power amplifier circuit of the television device via the I2S subinterface;

    wherein the sound-mixed signal is directly transmitted to the power amplifier circuit of the television device without passing through an application processor (AP) of the television device; and

    wherein a second set of pins of the USB3.0 plug constitute a USB2.0 subinterface.

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