TWI383383B - Audio processing system - Google Patents

Description

Audio processing system

The present invention relates to the field of electronic technologies, and in particular, to an audio processing system.

At present, digital electronic products such as portable DVDs generally have audio output and audio playback functions. In addition, some electronic products also have the function of playing an externally input audio signal, that is, using the speaker of the electronic product to play an externally input audio signal.

The electronic product having the function of playing external input audio signal includes an audio processing module, a control module, a storage module, an audio amplification module, an audio input and output module, and a sound reproducing device. When the music needs to be played, the control module is operated to cause the control module to generate a control signal; the audio processing module returns a control signal to decode the audio file stored in the storage module, and outputs the decoded audio signal of the audio file. The audio amplification module amplifies the audio signal output by the audio processing module, and outputs a driving signal suitable for driving the sound reproducing device, so that the sound reproducing device plays back the sound or music carried by the audio signal. The audio input and output module is connected to the audio processing module and the audio amplification module, and is configured to output an audio signal output by the audio processing module.

When an external audio signal is required to be played back by the sound reproduction device of the electronic product, the external audio signal is received by the audio input and output module of the electronic product, and the external audio signal is transmitted to the audio amplification module for amplification processing. A drive signal for driving the sound reproducing device is obtained.

However, since the audio input and output module is also connected to the audio processing module, an external audio signal received by the audio input/output module will partially flow into the audio processing module, thereby losing the audio flowing into the audio processing module. The signal causes the attenuation of the external audio signal and affects the effect of the external audio played by the electronic product.

In view of this, it is necessary to provide an audio processing system that reduces the attenuation of external input audio.

An audio processing system includes a control unit, a first processing unit, a storage unit, a conversion unit, a playback unit, an input and output unit, a switch unit, and a node, and the control unit is configured to generate a trigger signal according to a user operation, and the storage unit is configured to store An audio file, the first processing unit is configured to: return a trigger signal to decode the stored audio file, and output a first audio signal, where the converting unit is configured to convert the first audio signal into a driving signal, where the playing unit uses Receiving the driving signal and playing the sound carried by the driving signal, the control unit generates a switching signal while generating the trigger signal, and the switching unit is configured to connect the first processing unit to the node in response to the switching signal, and Transmitting the first audio signal to a conversion unit and an input/output unit connected to the node, the switch unit is further configured to disconnect the connection between the first processing unit and the node when the switch signal is not received, the input and output The unit is further configured to receive an external audio signal, and the external audio signal is transmitted to the node through the node Conversion unit, the conversion unit is further configured to externally input the audio signal into a driving signal.

The audio processing system as described above responds to the switching signal by the switching unit Connecting the first processing unit and the node to transmit the first audio signal to the conversion unit and the input and output unit, and disconnecting the connection between the first processing unit and the node when the switch unit does not receive the switch signal, so as to make the input The external audio signal received by the output unit is not transmitted to the first processing unit and the switching unit, effectively preventing the external audio signal from being attenuated.

As shown in FIG. 1, the audio processing system 100 of a preferred embodiment includes a control unit 101, a first processing unit 103, a storage unit 105, a switch unit 107, a conversion unit 109, a playback unit 111, an input and output unit 113, and a second Processing unit 115 and node 120.

The control unit 101 generates a trigger signal and a switch signal based on the user's operation, and transmits the trigger signal and the switch signal to the first processing unit 103 and the switch unit 107 respectively; the control unit 101 also stops generating the trigger signal and the switch signal based on the user's operation.

The storage unit 105 is for storing an audio file. The audio file can be an MP3 audio file, a WMA audio file, or other folder that includes audio files. The storage unit 105 can also be a hard disk.

The first processing unit 103 is configured to receive and respond to the trigger signal to decode the audio file stored in the storage unit 105, and output the first audio signal to the switch unit 107. In this embodiment, the first processing unit 103 includes a decoding module, a digital-to-analog conversion module, and an amplification module. The decoding module is configured to decode and output the audio file stored in the storage unit 105 to output a digital audio signal; the digital-to-analog conversion module is configured to convert the digital audio signal The analog analog audio signal is output; the amplification module is configured to amplify the analog audio signal and output the first audio signal.

The switch unit 107 is configured to return the switch signal to the first processing unit 103 and the node 120 to output the first audio signal to the conversion unit 109 and the input and output unit 113 through the node 120. The switch unit 107 also disconnects the connection between the first processing unit 103 and the node 120 when the switch signal is not received.

The second processing unit 115 is configured to receive the first audio signal, and process the first audio signal, such as filtering the noise in the first audio signal, and simultaneously input the processed first audio signal by the input and output unit 113. Output to the outside. The second processing unit 115 can be a filter circuit.

The input and output unit 113 is also configured to receive an externally input audio signal. The input and output unit 113 can be a 3.5 mm headphone jack. The second processing unit 115 is further configured to receive an audio signal from the input/output unit 113, and process the external audio signal to reduce noise in the audio signal and obtain a second audio signal. The second audio signal is transmitted to the conversion unit 109 by the node 120.

The converting unit 109 is configured to perform amplification conversion on the first audio signal and the second audio signal from the first processing unit 103 and the second processing unit 113 respectively to obtain a driving signal capable of driving the playing unit 111. The conversion unit 109 is a signal amplifying device in this embodiment.

The playing unit 111 is a speaker for receiving the driving signal to play the audio carried by the driving signal.

When it is required to play external audio with the playing unit 111, the control unit 101 The receiving user stops generating the trigger signal and the switching signal, and the switch unit 107 does not receive the switching signal and disconnects the connection between the first processing unit 103 and the node 120, so that the output by the second processing unit 115 is The two audio signals are not shunted to the second processing unit 103 and the switch unit 107 when transmitted to the conversion unit 109 by the node 120, thereby effectively preventing the second audio signal from being attenuated and improving the sound quality.

Audio processing system ‧‧100

Control unit ‧‧‧101

First processing unit ‧‧‧103

Storage unit ‧‧‧105

Switching unit ‧‧107

Conversion unit ‧‧‧109

Play unit ‧‧‧111

Input and output unit ‧‧‧113

Second processing unit ‧‧‧115

Node ‧‧‧120

1 is a functional block diagram of an audio processing system in accordance with a preferred embodiment.

Audio processing system ‧‧100

Control unit ‧‧‧101

First processing unit ‧‧‧103

Storage unit ‧‧‧105

Switching unit ‧‧107

Conversion unit ‧‧‧109

Play unit ‧‧‧111

Input and output unit ‧‧‧113

Second processing unit ‧‧‧115

Node ‧‧‧120

Claims (7)

An audio processing system includes a control unit, a first processing unit, a storage unit, a converting unit, a playing unit, and an input and output unit, wherein the control unit is configured to generate a trigger signal according to a user operation, where the storage unit is configured to store an audio file, The first processing unit is configured to: decode the stored audio file by the trigger signal, and output the first audio signal, the converting unit is configured to convert the first audio signal into a driving signal, and the playing unit is configured to receive the driving The signal and the sound played by the driving signal are improved. The audio processing system further includes a switch unit and a node. The control unit generates a switching signal while generating the trigger signal, and the switch unit is configured to respond to the switching signal. Connecting the first processing unit to the node, and transmitting the first audio signal to the conversion unit and the input and output unit connected to the node, the switch unit is further configured to disconnect the first process when the switch signal is not received a connection between a unit and a node, the input and output unit is also for receiving an external audio signal The external audio signal is transmitted by the node to the conversion unit, the conversion unit is further configured to convert the externally input audio signal as the drive signal. The audio processing system of claim 1, wherein the audio processing system further comprises a second processing unit connected between the node and the input and output unit for processing the first audio signal. It is transmitted to the input and output unit, and the external audio signal received by the input and output unit is processed and transmitted to the node, and transmitted to the conversion unit by the node. The audio processing system of claim 2, wherein the second processing unit is a filter circuit. The audio processing system of claim 1, wherein the conversion unit is a signal amplifying device. The audio processing system of claim 1, wherein the first processing unit includes a decoding module for decoding and outputting an audio file stored in the storage unit to output a digital audio signal, for performing the digital audio signal. The digital-to-analog conversion module that converts the analog analog audio signal and the operational amplification module for amplifying the analog audio signal and outputting the first audio signal. The audio processing system of claim 1, wherein the input/output unit is a headphone jack. The audio processing system of claim 1, wherein the audio processing system is an optical disk drive having an external input audio signal.