KR100517018B1 - Apparatus for playing audio signal having audio mixing function and its method - Google Patents

Abstract

The present invention relates to an audio signal reproducing apparatus and method for reproducing digital sound source data, and more particularly to audio mixing technology.

In an audio signal reproducing apparatus for reproducing digital sound source data, the present invention provides an audio input for receiving first audio data from an audio data storage and decoding the same, and storing the first audio data in a corresponding region of an audio output buffer unit. Processing unit; An audio output processor for reading mixed audio data of a corresponding region of the audio output buffer unit and outputting the mixed audio data to a digital / analog converter; And detecting that the first audio data is stored in a corresponding region of the audio output buffer unit, and before the audio output processor processes the first audio data, the stored first audio data is read and the audio data is read. A digital mixing unit which calculates the second audio data received from the storage unit with the first audio data, mixes the two audio data, and stores the mixed audio data in an area of the same location where the first audio data is stored. It characterized by comprising;

Description

Audio signal reproducing apparatus having audio mixing function and method thereof {APPARATUS FOR PLAYING AUDIO SIGNAL HAVING AUDIO MIXING FUNCTION AND ITS METHOD}

The present invention relates to an audio signal reproducing apparatus and method for reproducing digital sound source data, and more particularly to audio mixing technology.

The technology of playing digital sound source data and presenting it to users is applied to many products such as home theater systems, karaoke systems, and MP3 players.

Referring to the operation of the audio signal reproducing apparatus that can be applied in this technical field as follows.

In other words, the audio reproducing apparatus decodes digital sound source data such as MPEG data or Dolby Digital sound data, converts them into PCM data, converts them to analog signals, amplifies them, and outputs them through a speaker.

At this time, due to the characteristics of the real-time processing of audio data, the audio reproducing apparatus is provided with an audio output buffer unit, and is divided into an audio input processing operation and an audio output processing operation.

That is, the audio input processing unit processes the audio data and then stores the audio data in the audio output buffer unit. The audio output processing unit reads the stored audio data and outputs it to the digital / analog converter. .

More specifically, the audio input processing unit decodes raw digital sound source data and stores it in a corresponding region of the audio output buffer unit using, for example, a write pointer. In addition, the audio output processor periodically reads audio data stored according to a frequency using a read pointer and outputs the audio data to a digital / analog converter.

Here, the write pointer indicates a position where the audio data transferred from the audio input processor is to be stored in the audio output buffer unit, and the read pointer indicates a position of the audio data to be read by the audio output processor.

The digital / analog converter then converts the (decoded) audio data into an analog signal, after which the analog audio signal is amplified by amplifying means and reproduced through a speaker or the like.

At least some of the above-described configuration of the audio signal reproducing apparatus may be highly integrated and implemented as a single chip. In addition, the audio signal reproducing apparatus may be implemented based on logic rather than expensive DSP to reduce the price of the product.

Such sound reproducing chips are sometimes referred to in the art as system-on-chip (SoC). An example of a system-on-chip is the CS7808 chip.

In the case of the CS7808 chip, in addition to the above-described audio input processing unit and audio output processing unit, the control unit is highly integrated and implemented as a single chip. Here, the controller controls the chip as a whole according to the program data programmed by the product designer, and performs an interface with the outside of the chip, for example. That is, the interface or the user interface between external devices (audio data storage, digital / analog converter, audio output buffer) is performed.

On the other hand, in order to enhance the competitiveness of the product, it is possible to add an audio mixing function to such an audio signal reproduction device. The audio mixing function is independent of the sound source data (hereinafter referred to as "first audio data") originally intended to be reproduced, for example, audio data provided by the audio signal reproducing apparatus itself (hereinafter referred to as "second audio data"). By mixing, the function that can be told to the user.

This audio mixing function can create various additional services according to the intention of the product designer. For example, the karaoke system can be applied as an effect sound output as a single signal to the original song. In addition, it can be designed so that a specific sound according to the user's key input (Start, Stop, Rewind, Foward, Search, channel change, etc.) can be heard (as a single signal mixed with the original audio signal).

However, according to the conventional technology, the audio mixing function is implemented by analog mixing. In particular, in the audio signal reproducing apparatus of the logic environment other than the audio signal reproducing apparatus of the DSP environment, since the first audio data is decoded in the pre-implemented logic, the analog mixing scheme will be adopted according to a conventional technique.

The problem of the analog mixing method is as follows.

That is, a circuit for analog-mixing the first audio data which has been processed such as decoding and converted to analog and the second audio data stored in a predetermined audio data storage unit and selected by the control unit and converted into analog is required. This requires additional hardware costs. In addition, the configuration of an additional port for the second audio data and a digital-to-analog converter is required.

The present invention has been made in such a situation, in an audio signal reproduction apparatus for reproducing sound source data, a method of mixing audio data digitally in existing hardware without adding separate analog hardware for audio mixing. Its purpose is to present it.

Furthermore, the present invention, in the audio signal reproduction apparatus implemented on a logic basis rather than expensive DSP-based, it is possible to mix the audio data digitally in the existing hardware without adding a separate analog hardware for audio mixing There is another purpose to presenting a solution.

According to an aspect of the present invention, an audio signal reproducing apparatus for reproducing digital sound source data includes receiving first audio data from an audio data storage unit and decoding the first audio data, and outputting the first audio data to a corresponding region of an audio output buffer unit. An audio input processing unit which stores data; An audio output processor for reading mixed audio data of a corresponding region of the audio output buffer unit and outputting the mixed audio data to a digital / analog converter; And detecting that the first audio data is stored in a corresponding region of the audio output buffer unit, and before the audio output processor processes the first audio data, the stored first audio data is read and the audio data is read. A digital mixing unit which calculates the second audio data received from the storage unit with the first audio data, mixes the two audio data, and stores the mixed audio data in an area of the same location where the first audio data is stored. It characterized by comprising;

Accordingly, the audio mixing function can be added to the audio signal reproducing apparatus, but the audio data can be digitally mixed with the minimum change of the existing hardware without additional addition of the analog audio mixing unit. In addition, according to the configuration of the present invention, the second audio before the first audio data is output processing even in the environment where the audio data is input / output processing by a fixed logic rather than expensive DSP based free audio mixing You can digitally mix data.

Furthermore, according to an auxiliary aspect of the present invention, the digital mixing unit may set an interrupt for the movement of the write pointer of the audio output buffer unit to monitor the input of the first decoded audio data.

Accordingly, in the environment in which audio data is input / output processed by fixed logic, which is not expensive DSP-based audio mixing, the first audio data can be digitally mixed with the second audio data before being processed. A concrete implementation plan can be prepared.

Furthermore, according to an auxiliary aspect of the present invention, the audio input processing unit, the audio output processing unit and the digital mixing unit is implemented as a single sound source reproduction chip.

Furthermore, according to an auxiliary aspect of the present invention, the audio input processing unit, the audio output processing unit, the digital mixing unit and the audio output buffer unit is implemented as a single sound source playback chip;

Accordingly, the digital audio mixing operation according to the present invention can be implemented in a conventional audio reproduction chip.

Furthermore, according to an auxiliary aspect of the present invention, the digital mixing unit is implemented in a control unit that can control the operation of the chip according to the program data of the product designer;

Accordingly, a controller capable of controlling the operation of the chip in accordance with the program designer's program data can act as the digital mixing unit, and digital audio mixing to the audio signal reproducing apparatus by software development without changing existing hardware. You can add functionality.

Furthermore, according to an auxiliary aspect of the present invention, the second audio data is provided for every frequency that the first audio data may have.

Accordingly, the first audio data to be reproduced by the user has various frequency bands. When the audio signal reproducing apparatus prepares second audio data for each frequency band, the first audio data of a certain frequency band is reproduced. Audio mixing is also possible.

Furthermore, according to an additional aspect of the present invention, when the first audio data is not stored in the corresponding region of the audio output buffer unit, the digital mixing unit receives the second audio data received from the audio data storage unit. Storing in a corresponding region of the audio output buffer unit.

As a result, even when the reproduction of the first audio data is finished, the second audio data can be reproduced even when the effect sound or the like is to be reproduced.

According to another aspect of the present invention, the present invention provides an audio mixing method of an audio signal reproducing apparatus including at least an audio input processing unit, an audio output processing unit, and an audio output buffer unit, wherein the first audio data is input from the audio data storage unit. Sensing input to the processing unit, decoded, and stored in a corresponding region of the audio output buffer unit; Before the first audio data stored in the audio output buffer unit is output processed by the audio output processor, the first audio data stored in the audio output buffer unit is read and second audio data received from the audio data storage unit is received. Operating with the audio data to mix the two audio data; And storing the mixed audio data in the same location area of the audio output buffer unit in which the first audio data is stored.

Accordingly, the audio mixing function can be added to the audio signal reproducing apparatus, but the audio data can be digitally mixed with the minimum change of the existing hardware without additional addition of the analog audio mixing unit. In addition, according to the configuration of the present invention, the second audio before the first audio data is output processing even in the environment where the audio data is input / output processing by a fixed logic rather than expensive DSP based free audio mixing You can digitally mix data.

Furthermore, according to an auxiliary aspect of the present invention, the detecting step may include setting an interrupt for the movement of the write pointer of the audio output buffer unit to monitor the first decoding audio data being input.

Accordingly, in the environment in which audio data is input / output processed by fixed logic, which is not expensive DSP-based audio mixing, the first audio data can be digitally mixed with the second audio data before being processed. A concrete implementation plan can be prepared.

Furthermore, according to an auxiliary aspect of the present invention, each of the above steps is operated by a digital mixing unit, wherein the audio input processing unit, the audio output processing unit and the digital mixing unit are implemented by a single sound source reproduction chip. It is done.

Furthermore, according to an auxiliary aspect of the present invention, each of the above steps is operated by a digital mixing unit, and the audio input processing unit, audio output processing unit, audio output buffer unit and digital mixing unit are implemented as a single sound source reproduction chip. It is characterized by.

Accordingly, the digital audio mixing operation according to the present invention can be implemented in a conventional audio reproduction chip.

Furthermore, according to an auxiliary aspect of the present invention, each of the steps are operated by the digital mixing unit, the digital mixing unit, a control unit for controlling the operation of the sound source playback chip in accordance with the program data of the product designer It is characterized in that;

Accordingly, a controller capable of controlling the operation of the chip in accordance with the program data of the product designer can act as the digital mixing unit, and the digital audio mixing function of the audio signal reproducing apparatus by software development without changing the existing hardware. You can add

Furthermore, according to an auxiliary aspect of the present invention, the second audio data is provided for every frequency that the first audio data may have.

Accordingly, the first audio data to be reproduced by the user has various frequency bands. When the audio signal reproducing apparatus prepares second audio data for each frequency band, the first audio data of a certain frequency band is reproduced. Audio mixing is also possible.

Furthermore, according to an additional aspect of the present invention, when the first audio data is not stored in the corresponding region of the audio output buffer unit, the second audio data received from the audio data storage unit may correspond to the audio output buffer unit. Storing in the area; characterized by further performing.

As a result, even when the reproduction of the first audio data is finished, the second audio data can be reproduced even when the effect sound or the like is to be reproduced.

The foregoing and further aspects of the present invention will become more apparent through the following embodiments. Hereinafter, the present invention will be described in detail with reference to the preferred embodiments described with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is an example illustrating a configuration of an audio signal reproducing apparatus having an audio mixing function according to the present invention.

As shown in FIG. 1, the present invention provides an audio signal reproducing apparatus for reproducing digital sound source data, and receives first audio data from the audio data storage unit 101, decodes the first audio data, and outputs an audio output buffer unit. An audio input processor (105) for storing the first audio data in a corresponding area of (111); An audio output processing unit 109 for reading the mixed audio data of the corresponding region of the audio output buffer unit 111 and outputting the mixed audio data to the digital / analog conversion unit 103; And detecting that the first audio data is stored in a corresponding area of the audio output buffer unit 111, and before the audio output processor 109 processes the first audio data, the stored first audio data. Read the data, calculate the second audio data received from the audio data storage unit 101 with the first audio data, mix the two audio data, and store the mixed audio data with the first audio data. And a digital mixing unit 107 for storing in the corresponding area of the audio output buffer unit 111 at the same position.

The audio data storage unit 101 stores various types of first audio data. The audio data may be MPEG data, AC3 (Dolby Digital sound) data, RAW PCM data, or the like. In addition, the audio data storage unit 101 stores second audio data according to an exemplary embodiment of the present invention. Preferably, the second audio data may be sound effect data, and may be in PCM format. The audio data storage unit 101 stores and provides the first audio data and the second audio data. The audio data storage unit 101 may be physically separated and mounted on a product.

The operations of the audio input processing unit 105, the audio output processing unit 109 and the audio output buffer unit 111 are widely used in the field of ordinary audio signal reproduction technology, as pointed out in the problems of the prior art. For example, the audio input processor 105 receives and decodes the unprocessed first audio data from the audio data storage 101 and uses the write pointer to correspond to the corresponding audio output buffer 111. Can be stored in the area. In addition, the audio output processor 109 may periodically read the corresponding audio data stored according to a frequency by using a read pointer and output the same to the digital / analog converter 103. have. In this case, according to a characteristic aspect of the present invention, the audio output processor 109 reads data in which the first audio data and the second audio data are digitally mixed, and outputs the data to the digital / analog converter 103.

The digital / analog converter 103 converts the mixed audio data into an analog signal and outputs the same to the speaker, for example. The analog signal is amplified and then output through the speaker.

The digital mixing unit 107 detects that the first audio data is stored in the corresponding area of the audio output buffer unit 111. According to a preferred embodiment of the present invention, the digital mixing unit 107 may set an interrupt for the movement of the write pointer of the audio output buffer unit 111 to monitor that the first decoded audio data is input. When a specific event occurs, a technique of reading out data stored in a specific region of a buffer by executing an interrupt routine is well known, and thus a detailed description thereof will be omitted.

In addition, the digital mixing unit 107 reads the stored first audio data, and reads the second audio data from the audio data storage unit 101. The digital mixing unit 107 calculates and mixes the two audio data values and digitally mixes the resultant values, that is, the mixed audio data of the audio output buffer unit 111 at the same position where the first audio data is stored. Save to the area.

The digital mixing unit 107 performs the read operation, the mixing operation and the storage operation before the audio output processing unit 109 outputs the first audio data according to a normal operation. This is because the characteristics of the audio data processed in real time should not have any influence on the existing audio output processing unit. The digital mixing unit 107 should have a processing speed sufficiently higher than that of the audio input processing unit 105 and the audio output processing unit 109.

According to the above-described configuration of the present invention, the audio mixing function can be added to the audio signal reproducing apparatus, but the audio data can be digitally mixed with the minimum change of the existing hardware without additionally adding the analog audio mixing unit. It becomes the number. In addition, according to the configuration of the present invention, the second audio before the first audio data is output processing even in the environment where the audio data is input / output processing by a fixed logic rather than expensive DSP based free audio mixing You can digitally mix data.

According to a preferred embodiment of the present invention, the audio input processing unit 105, the audio output processing unit 109 and the digital mixing unit 107 is implemented as a single sound source playback chip 110;

In addition, according to a preferred embodiment of the present invention, the audio input processing unit 105, the audio output processing unit 109, the digital mixing unit 107 and the audio output buffer unit 111 is a single sound source playback chip (Fig. 1 It is characterized in that implemented in;

As described above, in the technical field of an audio signal reproducing apparatus for reproducing digital sound source data, it is common to use a system-on-chip, and the digital mixing unit 107, which is a characteristic configuration of the present invention, is used in such a sound reproducing chip. Can be implemented.

As a result, the digital audio mixing operation according to the present invention can be implemented in a conventional sound source reproduction chip.

In addition, the normal sound source playback chip is provided with a control unit for controlling the operation of the sound source playback chip in accordance with the program data of the product designer. Therefore, when the digital mixing unit 107, which is a characteristic configuration of the present invention, is implemented as a control unit provided in the existing sound source reproducing chip, the control unit capable of controlling the operation of the chip in accordance with program data of a product designer may include the digital unit. It can act as a mixing unit, and it is possible to add a digital audio mixing function to an audio signal reproducing apparatus by software development without changing existing hardware.

Meanwhile, the first audio data to be reproduced by the user has various frequency bands (eg, 32 KHz, 44 KHz, 48 KHz). Since two audio data must have the same frequency band for audio mixing, according to a characteristic configuration of the present invention, the second audio data should be prepared for each frequency band.

Accordingly, even when any first audio data is reproduced, the second audio data of the corresponding frequency band can be mixed.

On the other hand, for example, when the song is finished, the first audio data is not stored in the audio output buffer 111. Even in this case, it may be necessary to reproduce second audio data such as an effect sound. For this purpose, the digital mixing unit 107 does not attempt to mix the second audio data received from the audio data storage unit 101. It is stored in the corresponding area of the audio output buffer unit 111 as it is. Then, the audio output processor 109 reads the second audio data stored in the corresponding area by using a read pointer or the like and outputs the second audio data to the digital / analog converter 103.

2 is a flowchart illustrating an audio mixing method of an audio signal reproducing apparatus according to the present invention. Hereinafter, a description will be given with reference to FIG. 1. In the description of FIG. 2, unnecessary portions overlapping with those of FIG. 1 will be omitted.

As shown in FIG. 2, the present invention provides an audio mixing method of an audio signal reproducing apparatus including at least an audio input processing unit 105, an audio output processing unit 109, and an audio output buffer unit 111. Detecting (201, 203) that the first audio data is input from the audio data storage unit (101) to the audio input processing unit (105), decoded, and stored in a corresponding area of the audio output buffer unit (111); Before the first audio data stored in the audio output buffer unit 111 is output processed by the audio output processing unit 109, the stored first audio data is read and input from the audio data storage unit 101. Mixing (205) two audio data by calculating received second audio data with the first audio data; And storing the mixed audio data in the same location area of the audio output buffer unit 111 in which the first audio data is stored (207).

The above configuration is described in terms of the digital mixing unit 107.

The audio input processor 105 receives and decodes the unprocessed first audio data from the audio data storage unit 101 (201), and uses a write pointer to correspond to an area of the audio output buffer unit 111. The digital mixing unit 107 detects that the first audio data is stored in the corresponding region of the audio output buffer unit 111 (not shown in FIG. 2).

According to a preferred embodiment of the present invention, the digital mixing unit 107 may set an interrupt for the movement of the write pointer of the audio output buffer unit 111 to monitor that the first decoded audio data is input.

The digital mixing unit 107 reads the stored first audio data, and reads the second audio data from the audio data storage unit 101. The digital mixing unit 107 calculates and digitally mixes the two audio data values (205), and converts the resultant audio data into the audio output buffer unit at the same position where the first audio data is stored. 111 is stored in the corresponding area (111).

The digital mixing unit 107 performs the read operation, the mixing operation and the storage operation before the audio output processing unit 109 outputs the first audio data according to a normal operation. This is because the characteristics of the audio data processed in real time should not have any influence on the existing audio output processing unit. The digital mixing unit 107 should have a processing speed sufficiently higher than that of the audio input processing unit 105 and the audio output processing unit 109.

The audio output processor 109 reads the mixed audio data stored in the corresponding region of the audio output buffer 111 and outputs the mixed audio data to the digital / analog converter 103 (209).

According to the above-described configuration of the present invention, the audio mixing function can be added to the audio signal reproducing apparatus, but the audio data can be digitally mixed with the minimum change of the existing hardware without additionally adding the analog audio mixing unit. It becomes the number. In addition, according to the configuration of the present invention, the second audio before the first audio data is output processing even in the environment where the audio data is input / output processing by a fixed logic rather than expensive DSP based free audio mixing You can digitally mix data.

According to a preferred embodiment of the present invention, the steps 205 and 207 are operated by the digital mixing unit 107, and the audio input processing unit 105, the audio output processing unit 109 and the digital mixing unit 107, It is implemented by a single sound source playback chip 110;

According to a preferred embodiment of the present invention, the steps 205 and 207 are operated by the digital mixing unit 107, and the audio input processing unit 105, the audio output processing unit 109, the digital mixing unit 107 and The audio output buffer unit 111 is implemented as a single sound source playback chip 110;

As described above, in the technical field of an audio signal reproducing apparatus for reproducing digital sound source data, it is common to use a system-on-chip, and the digital mixing unit 107, which is a characteristic configuration of the present invention, is used in such a sound reproducing chip. Can be implemented.

As a result, the digital audio mixing operation according to the present invention can be implemented in a conventional sound source reproduction chip.

Further, according to a preferred embodiment of the present invention, the steps 205 and 207 are operated by the digital mixing unit 107, the digital mixing unit 107, the sound source reproduction chip according to the program data of the product designer It is implemented in a control unit that can control the operation of the;

As described above, the normal sound source reproducing chip is provided with a control unit for controlling the operation of the sound source reproducing chip according to the program data of the product designer. Therefore, when the steps 205 and 207, which are characteristic features of the present invention, are implemented by the control unit provided in the existing sound source reproducing chip, the control unit capable of controlling the operation of the chip according to the program data of the product designer is the digital. It can act as a mixing unit, and it is possible to add a digital audio mixing function to an audio signal reproducing apparatus by software development without changing existing hardware.

Meanwhile, the first audio data to be reproduced by the user has various frequency bands (eg, 32 KHz, 44 KHz, 48 KHz). Since two audio data must have the same frequency band for audio mixing, according to a characteristic configuration of the present invention, the second audio data should be prepared for each frequency band.

Accordingly, even when any first audio data is reproduced, the second audio data of the corresponding frequency band can be mixed.

According to a preferred embodiment of the present invention, when the first audio data is not stored in the corresponding region of the audio output buffer unit 111, the second audio data received from the audio data storage unit 101 is provided. Storing in the corresponding area of the audio output buffer unit 111 (not shown in FIG. 2).

For example, when the song is finished, the first audio data is not stored in the audio output buffer 111. Even in this case, it may be necessary to reproduce second audio data such as an effect sound. For this purpose, the digital mixing unit 107 does not attempt to mix the second audio data received from the audio data storage unit 101. It is stored in the corresponding area of the audio output buffer unit 111 as it is. Then, the audio output processor 109 reads the second audio data stored in the corresponding area by using a read pointer or the like and outputs the second audio data to the digital / analog converter 103.

As described above, according to the preferred embodiment of the present invention, the audio data is added to the audio signal reproducing apparatus, but the digital audio data is minimized by changing the existing hardware without additionally adding the analog audio mixing unit. You can mix. In addition, even in an environment in which audio data is input / output processed by fixed logic that is not expensive DSP-based audio mixing, the first audio data may be digitally mixed with the second audio data before the first audio data is processed.

In addition, in the environment in which audio data is input / output processed by fixed logic that is not expensive DSP based free audio mixing, it is possible to digitally mix with the second audio data before outputting the first audio data. An implementation plan can be prepared.

In addition, it is possible to implement the digital audio mixing operation according to the present invention in a conventional audio reproduction chip.

In addition, a controller that can control the operation of the chip in accordance with the program data of the product designer, can act as the digital mixing unit, digital audio mixing function to the audio signal reproducing apparatus by software development without changing the existing hardware You can add

In addition, the first audio data to be reproduced by the user has various frequency bands. The audio signal reproducing apparatus prepares the second audio data for each frequency band so that the first audio data of any frequency band is reproduced. Audio mixing is now possible.

Further, even when the reproduction of the first audio data is finished, the effect sound or the like should be reproduced, the second audio data can be reproduced.

Although the present invention has been described with reference to the accompanying drawings, it should not be construed as being limited thereto, but should be construed to cover many modifications that are obvious from this.

1 is an example showing the configuration of an audio signal reproducing apparatus having an audio mixing function according to the present invention.

2 is a flowchart illustrating an audio mixing method of an audio signal reproducing apparatus according to the present invention.

Claims (14)

An audio signal reproducing apparatus for reproducing digital sound source data, An audio input processor configured to receive first audio data from an audio data storage unit, decode the first audio data, and store the first audio data in a corresponding region of an audio output buffer unit; An audio output processor for reading mixed audio data of a corresponding region of the audio output buffer unit and outputting the mixed audio data to a digital / analog converter; And Detect that the first audio data is stored in a corresponding region of the audio output buffer unit, and before the audio output processor processes the first audio data, read the stored first audio data, and store the audio data. The second audio data received from the unit is calculated with the first audio data, and the two audio data are mixed, and the mixed audio data is stored in a corresponding region of the audio output buffer unit at the same position where the first audio data is stored. A digital mixing unit for storing; Audio signal reproduction apparatus having an audio mixing function, characterized in that it comprises a. The method according to claim 1, The digital mixing unit, Setting an interrupt to monitor the first decoded audio data input; Audio signal reproduction apparatus having an audio mixing function, characterized in that. The method according to claim 1, The audio input processing unit, the audio output processing unit and the digital mixing unit, Implemented with a single sound reproducing chip; Audio signal reproduction apparatus having an audio mixing function, characterized in that. The method according to claim 1, The audio input processing unit, the audio output processing unit, the digital mixing unit and the audio output buffer unit, Implemented with a single sound reproducing chip; Audio signal reproduction apparatus having an audio mixing function, characterized in that. The method according to claim 3 or 4, The digital mixing unit, A controller configured to control an operation of the sound source reproducing chip according to program data of a product designer; Audio signal reproduction apparatus having an audio mixing function, characterized in that. The method according to claim 1, The second audio data is, Providing for every frequency that the first audio data may have; Audio signal reproduction apparatus having an audio mixing function, characterized in that. The method according to claim 1, The digital mixing unit, When the first audio data is not stored in the corresponding area of the audio output buffer unit, Storing second audio data received from the audio data storage unit in a corresponding area of the audio output buffer unit; Audio signal reproduction apparatus having an audio mixing function, characterized in that. In the audio mixing method of the audio signal reproduction apparatus comprising at least an audio input processing unit, an audio output processing unit, an audio output buffer unit, Detecting that the first audio data is input from the audio data storage unit to the audio input processing unit, decoded, and stored in a corresponding region of the audio output buffer unit; Before the first audio data stored in the audio output buffer unit is output processed by the audio output processor, the first audio data stored in the audio output buffer unit is read and second audio data received from the audio data storage unit is received. Operating with the audio data to mix the two audio data; And Storing the mixed audio data in the same location area of the audio output buffer unit in which the first audio data was stored; The audio mixing method of the audio signal reproducing apparatus, characterized in that comprises a. The method according to claim 8, The sensing step, Setting an interrupt to monitor the first decoded audio data input; An audio mixing method of an audio signal reproducing apparatus, characterized in that. The method according to claim 8, Each of the above steps, It is operated by the digital mixing unit, The audio input processing unit, audio output processing unit and the digital mixing unit, Implemented with a single sound reproducing chip; An audio mixing method of an audio signal reproducing apparatus, characterized in that. The method according to claim 8, Each of the above steps, It is operated by the digital mixing unit, The audio input processor, an audio output processor, an audio output buffer unit, and a digital mixing unit, Implemented with a single sound reproducing chip; An audio mixing method of an audio signal reproducing apparatus, characterized in that. The method according to claim 10 or 11, Each of the above steps, Operated by the digital mixing unit, The digital mixing unit, A controller configured to control an operation of the sound source reproducing chip according to program data of a product designer; An audio mixing method of an audio signal reproducing apparatus, characterized in that. The method according to claim 8, The second audio data is, Providing for every frequency that the first audio data may have; An audio mixing method of an audio signal reproducing apparatus, characterized in that. The method according to claim 8, When the first audio data is not stored in the corresponding area of the audio output buffer unit, Storing second audio data received from the audio data storage unit in a corresponding area of the audio output buffer unit; The audio mixing method of the audio signal reproducing apparatus further comprising.