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All-digital multi-channel playback system without sound card and playback method

An all-digital, playback system technology, applied in transducer circuits, sensors, signal processing, etc., can solve the problems of in-depth development of a networked audio system, inability to increase arbitrarily, and increase in power amplifier costs, achieving strong practicability and reducing cost, the effect of improving sound quality

Active Publication Date: 2018-06-19
黄朝一
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires the purchase of additional hardware, the cost of the power amplifier increases, and its accuracy is fixed by the hardware and cannot be improved at will; in addition, it can only support one class D power amplifier. Since it does not support the network, there are complicated connections and no networking when multiple sets are used. The basis for in-depth development of sound systems

Method used

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  • All-digital multi-channel playback system without sound card and playback method
  • All-digital multi-channel playback system without sound card and playback method
  • All-digital multi-channel playback system without sound card and playback method

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0029] The inventio...

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Abstract

The invention discloses a full-digital multichannel playing system and method without a sound card. The playing system comprises a computer control terminal and a PWM signal receiving terminal. The computer control terminal converts files in various audio formats into high-fidelity PWM files in a lossless manner; and the PWM signal receiving terminal is provided with N (which is a positive integer) ports that can work at the same time to output high levels or low levels. The computer control terminal directly transmits lossless PWM audio signals to the PWM signal receiving terminal via a network, and audio high-fidelity lossless restoration can be completed without using dedicated hardware to convert a traditional audio format into a PWM signal; and a plurality of power amplifiers can be driven at the same time by the cheap PWM signal receiving terminal to work at the same time.

Description

technical field [0001] The invention relates to the technical field of audio playback, in particular to a multi-channel playback system and playback method based on a full-digital soundless card. Background technique [0002] At present, the mainstream audio playback mode is to use sound card hardware D / A conversion to decode audio data files to output analog audio signals, mainly using Class AB or Class A power amplifiers. also like figure 1 The traditional Class D power amplifier shown converts the analog audio signal into a PWM signal through a comparator for power amplification and filtering. The above method is to amplify the power of the audio analog signal, and the presence of nonlinear distortion and intermodulation distortion will lead to sound deterioration. . To solve the problem of sound distortion, such as figure 2 As shown, Texas Instruments uses pure hardware circuits to realize D / D high-precision conversion, uses digital interpolation filters to filter, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 黄朝一
Owner 黄朝一
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