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Audio decoding device an audio output circuit thereof

An audio output and audio decoding technology, applied in the field of audio decoding, can solve the problems of high distortion and large audio noise.

Active Publication Date: 2017-06-13
IAG GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an audio decoding device and its audio output circuit, aiming to solve the technical problems of high noise and high distortion of the audio output by the decoder that cannot be solved in the prior art

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  • Audio decoding device an audio output circuit thereof
  • Audio decoding device an audio output circuit thereof
  • Audio decoding device an audio output circuit thereof

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 The module structure of the audio output circuit of the above-mentioned audio decoding device is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0029] The audio output circuit 1 includes: a low-pass filter module 10, an impedance transformation module 20, a buffer module 30 and an audio signal amplification module 40, the output of the low-pass filter module 10 is connected to the input of the impedance transformation module 20, and the output of the impedance transformation mo...

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Abstract

The invention belongs to the technical field of audio decoding, and particularly relates to an audio decoding device and an audio output circuit thereof. The audio output circuit comprises a low-pass filter module, an impedance conversion module, a buffer module and an audio signal output module, wherein the low-pass filter module outputs a filtered audio signal to the impedance conversion module; the impedance conversion module buffers the filtered audio signal and converts impedance; the converted audio signal is output to the buffer module; and the buffer module carries out buffer processing on the converted audio signal and outputs the buffered audio signal to an audio signal amplifying module, thereby outputting a low-noise and low-distortion audio signal.

Description

technical field [0001] The invention belongs to the technical field of audio decoding, and in particular relates to an audio decoding device and an audio output circuit thereof. Background technique [0002] A decoder is a digital-to-analog converter, also known as DAC (Digital to analog converter); it is a device that converts digital signals into analog signals in the form of current or voltage; like the CD player, DVD player, Portable players, TVs, mobile phones and other devices all have decoders, because only through the digital / analog conversion function of the decoder can we see video images and hear sound from these devices. The decoder is to convert the digital signal that cannot be seen and heard into an analog signal that can be recognized by humans; in audio equipment, the decoder also plays a vital role, in the process of converting from digital signal to analog signal Among them, the quality of the decoder directly determines the quality of the output analog s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2420/03
Inventor 张太武
Owner IAG GROUP LIMITED
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