KR101883244B1 - Apparatus and method for playing high definition audio for portable device based on ANDROID operating system - Google Patents

Abstract

A high-quality audio playback apparatus and method for a portable electronic device based on an Android operating system are provided. The high-quality audio reproducing apparatus of the portable electronic apparatus based on the Android operating system according to the embodiment of the present invention is a main processor of the portable electronic apparatus. The apparatus is driven by the Android operating system and controls the functions of the portable electronic apparatus. A first processor to reproduce data; And a second processor for reproducing a high-quality sound source having a higher sampling rate and bit depth than the media format supported by the Android operating system. Here, the first processor restricts a part of the functions of the portable electronic device supported through the Android operating system when reproducing a high-quality sound source, and the second processor limits the output time error of the digital signal of the high- And the second processor adjusts the output signal of the first processor to a constant frequency with respect to the sampling rate of the high-quality sound source, and outputs the output signal in real time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-quality audio reproducing apparatus and a method thereof for a portable electronic apparatus based on an Android operating system,

The present invention relates to a high-quality audio reproducing apparatus and method for a portable electronic apparatus based on an Android operating system, and more particularly to a high-quality audio reproducing apparatus and a method for a portable electronic apparatus based on an Android operating system capable of reproducing high-quality audio not supported by an Android operating system without noise .

Currently, portable electronic devices such as smartphones are based on Google's Android operating system (OS) or Apple's iOS. Here, in the case of the Android OS, referring to the media format and codec that can be reproduced on the Android platform, which is directly known by Google, the current Android 7.0 (Naugat) version has a bit depth of up to 24 bits and a sampling rate Rate) sound source.

For this reason, FLAC (Free Lossless Audio Codec), which is a lossless compression format that is spreading recently, supports sampling rates up to 192kHz, but down sampling to 44.1kHz is inevitable in the Android platform.

This is not to reproduce the lossless sound source itself, and noise is inevitably generated during downsampling.

In addition, the DSD (Direct Stream Digital) method, which is a new method that is 64 times as much as the PCM (Pulse Code Modulation) method of the conventional CD, can not reproduce itself.

As described above, portable electronic devices such as a smart phone employing a conventional Android OS can not reproduce a high-quality sound source at the original sound level, so that the user is required to separately provide an expensive reproducing device for reproducing a high- There is an inconvenience to pay.

KR 2016-0105231 A

According to an aspect of the present invention, there is provided a high-quality audio reproducing apparatus and method for a portable electronic device based on an Android operating system capable of reproducing high-quality audio not supported by an Android operating system without noise do.

According to an aspect of the present invention, there is provided a main processor of a portable electronic device, which is driven by an Android operating system and controls a function of the portable electronic device and reproduces a sound source in a format supported by the Android operating system, 1 processor; And a second processor for reproducing a high-quality sound source having a higher sampling rate and bit depth than the media format supported by the Android operating system. Here, the first processor may restrict a part of the functions of the portable electronic device supported through the Android operating system when the high-quality sound source is reproduced, and may be configured to limit the output time error of the digital signal of the high- And the second processor adjusts the output signal of the first processor to a constant frequency with respect to the sampling rate of the high-quality sound source, and outputs the output signal in real time.

In one embodiment, the first processor stores environment information on a program or service not related to audio reproduction when the high-quality sound source is reproduced, terminates the program or the service, When the reproduction is terminated, the removed program or service can be restored according to the stored environment information.

In one embodiment, the high-quality audio reproducing apparatus of the portable operating system based on the Android operating system may further include a digital-analog converting unit converting a digital signal of the sound source output from the first processor and the second processor into an analog signal .

In one embodiment, the first processor can process only the function of the second processor to operate with the user when reproducing the high-quality sound source.

In one embodiment, the second processor may be operated by an operating system different from the Android operating system.

According to another aspect of the present invention, there is provided an Android operating system-based portable electronic device having the above-described high-quality audio reproducing apparatus.

According to another aspect of the present invention, there is provided a method for reproducing a high-quality sound source having a higher sampling rate and bit depth than a sound source of a first processor driven by an Android operating system and a sound source of a format supported by the Android operating system, There is provided a high-quality audio reproducing method for a portable electronic device based on an Android operating system having a two-processor. The high-quality audio reproducing method of the portable electronic device based on the Android operating system includes: executing the high-quality player by the first processor; Limiting a portion of the functionality of the portable electronic device wherein the first processor is supported through the Android operating system; And reproducing the high-quality sound source by the second processor. Wherein the reproducing step determines the output time point of the digital signal corresponding to the limited function so that the first processor reduces an output time error of the digital signal of the high sound quality sound source, Is constantly adjusted in a cycle with respect to the sampling rate of the high-quality sound source and output in real time.

In one embodiment, the limiting step may store environment information for a program or service not related to audio playback and terminate the program or service.

In one embodiment, the high-quality audio playback method of the portable electronic device based on the Android operating system may further include restoring the terminated program or service according to the stored environment information when the playback is completed.

In one embodiment, the regenerating step may process only the function with which the first processor interacts with the user.

The high-quality audio reproducing apparatus and method of the portable operating system based on the Android operating system according to an embodiment of the present invention restricts some functions of the portable electronic device when reproducing high-quality sound sources not supported by the Android operating system, By constantly adjusting the sampling rate in a cycle, the portable electronic apparatus based on the Android operating system can reproduce high-quality audio at the original sound level, thereby increasing the utility of the user.

Further, the present invention provides a high-quality audio reproducing apparatus in a portable electronic device based on an Android operating system, thereby eliminating the need for a user to separately provide an expensive reproducing apparatus to reproduce high-quality original sound, So that the economic utility can be increased.

1 is a block diagram showing a schematic configuration of a high-quality audio reproducing apparatus of a portable electronic device based on an Android operating system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a software layer structure of the high-quality audio reproducing apparatus of FIG. 1. FIG.
3A and 3B are timing charts for explaining the operation of the high-quality audio reproducing apparatus of FIG.
4 is a flowchart of a high-quality audio reproducing method in a portable electronic device based on an Android operating system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Hereinafter, a high-quality audio reproducing apparatus of a portable electronic device based on an Android operating system according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a block diagram showing a schematic configuration of a high-quality audio reproducing apparatus of a portable electronic device based on an Android operating system according to an embodiment of the present invention

1, a high-quality audio reproducing apparatus 100 of a portable electronic device based on an Android operating system according to an embodiment of the present invention includes an input unit 110, a communication unit 115, a control unit 120, a storage unit 130, A display unit 140, and a speaker 150.

Here, the portable operating system based on the Android operating system is an electronic device driven by the Android operating system, and may be a smart phone, a cellular phone, a smart watch, a DMB, a tablet PC, a portable computer, and the like.

The input unit 110 may be inputted with a user's selection such as execution and selection of a high-quality player. For example, the input unit 110 may be a touch panel capable of outputting not only a user input using a remote controller, a joystick, a keyboard, a mouse, etc., but also an image.

The communication unit 115 can communicate with other portable electronic devices or communication servers based on the Android operating system through an external communication network. The communication unit 115 may perform not only wireless communication with the public communication network but also communication with a media server using a short-range wireless communication method such as WiFi, ZigBee, and BT, and a network.

The control unit 120 controls other components, and includes a first processor 122 and a second processor 124.

The first processor 122 is a main processor of a portable electronic device based on an Android operating system and is operated based on an Android operating system and can perform or control various functions supported by the Android operating system. The first processor 122 can reproduce sound sources of various formats supported by the Android operating system.

When the first processor 122 reproduces a high-quality sound source having a higher sampling rate and bit depth than the media format supported by the Android operating system, the first processor 122 can share a portion of processing (decoding) of the high-quality sound source.

Here, unlike a real-time operating system, a general-purpose operating system such as an Android operating system has a problem that when the number of services running in the memory increases and the number of services increases, it becomes difficult to guarantee operation at a precise time.

In other words, when a high-quality sound source such as a digital lossless sound source is processed in a non-real-time operating system such as the Android operating system, the timing of processing and outputting the unit audio information can not be constantly guaranteed. In the case of playing a high sound quality sound source, The quality of the actual sound heard by the user deteriorates.

To this end, the present invention can minimize the load of other programs or services in which the first processor 122 resides in memory. For example, the first processor 122 may restrict its use so that it can not run other applications unrelated to Hi-Fi (High Fidelity) audio output. That is, the first processor 122 processes only the function of interacting with the user and the function of controlling the second processor 124 when processing the digital lossless sound source, and the second processor 124 processes the high- can do.

Here, the function of interacting with the user is to process a user's input such as a screen touch during high-quality reproduction, and the function for controlling the second processor 124 is a function for the first processor 122 to output And to request the processing of the high-quality sound source while providing the digital signal of the determined high-quality sound source to the second processor 124.

At this time, the first processor 122 stores the current environment information, and may terminate the programs or services not related to the high-quality audio output to remove the memory.

As described above, since the first processor 122 resides only a minimum program or service in the memory, it is possible to secure a maximum memory for high-quality audio reproduction by the first processor 122 and the second processor 124 The occupancy rate of the first processor 122 can be minimized.

At this time, the first processor 122 determines the output timing of the digital signal of the high-quality sound source in response to the limited function, so that the output time error of the digital signal of the high-quality sound source can be reduced.

On the other hand, when the reproduction of the high-quality audio is completed, the first processor 122 reloads the pre-stored environment information and executes the corresponding program or service to restore the environment information.

The second processor 124 is operated on the basis of an operating system different from the Android operating system for reproducing a high sound quality sound source not supported by the Android operating system and can reproduce a high sound quality sound source according to the high sound quality reproducing instruction of the first processor 122. Here, the operating system different from the Android operating system may be a real-time operating system.

The second processor 124 uses the user interface provided by the Android operating system that is familiar to the user. However, the second processor 124 can reproduce a high-quality sound source in a format that is not supported by the Android operating system through a completely different path according to an instruction of high- have.

That is, when the high-quality sound source is converted into the analog audio, the second processor 124 controls the first processor 122 to convert the digital signal of the high- (Decoding) of the digital lossless sound source file so that the error at the time of processing (decoding) and outputting is converged to 0, and the software processing the information can be driven on a real-time operating system have.

At this time, the second processor 124 adjusts the output signal of the first processor 122 to a predetermined cycle with respect to the sampling rate of the high-frequency sound source so as to perform audio processing at a level close to the real-time operating system in a non-real-time operating system such as the Android operating system, Can be output. As a result, the high-quality sound source can be output with substantially the same quality as the original sound without an error at the output time point.

As such, the second processor 124 is able to play a high quality sound with a sound quality similar to that of a real-time operating system by ensuring compatibility required when a general Android program is executed and responsiveness of an operating system required for processing a high sound quality sound source.

In other words, the second processor 124 uses the occupancy rate and the memory capacity of the first processor 122, which are secured due to the restriction of some functions of the Android operating system when processing the digital lossless sound source, Playback can be performed. In particular, since the second processor 124 not only restricts the execution of a program or service not related to audio reproduction by the first processor 122, but also uses an independent operating system different from the Android operating system of the first processor 122 , High-quality reproduction can be performed with the same quality as the original sound without being disturbed by the execution of another program.

As described above, in the high-quality reproduction apparatus 100 according to the embodiment of the present invention, the first processor 122 and the second processor 124 share the roles of each other when reproducing a high-quality sound source such as a digital lossless sound source, The error of the output time is converged to zero, and it becomes possible to reproduce a stable sound source.

In addition, the high-quality reproduction apparatus 100 according to the embodiment of the present invention generally differs from a system in which all apps share an operating system environment in an Android operating system and controls the execution of apps through a launcher, You can use the launcher type to change the mode itself to an environment that can be executed correctly, and you can use the environment for high-definition audio playback as if you are using the system alternately with the existing Android system.

As a result, the high-quality reproduction apparatus 100 according to the embodiment of the present invention includes various sound source formats fundamentally supported by the Android operating system in the high-quality reproduction mode, so that high-quality sound sources such as FLAC and DSD are also bit- Stable play is possible under the same conditions as the original sound.

The storage unit 130 may store a program executed by the control unit 120 and a high-quality sound source.

The display unit 140 may display an audio player executed by the control unit 120. [ For example, the display unit 140 may be a touch panel capable of inputting as well as outputting an image.

The speaker 150 can output the output value of the audio player executed by the control unit 120 with an actual sound.

Hereinafter, the operation of the high-quality reproduction apparatus 100 will be described with reference to Figs. 2 and 3. Fig. FIG. 2 is a diagram illustrating a software layer structure of the high-quality audio reproducing apparatus of FIG. 1, and FIGS. 3a and 3b are timing diagrams for explaining the operation of the high-quality audio reproducing apparatus of FIG.

The software layer structure 200 of the high-quality audio reproducing apparatus 100 may include a multimedia play application 210, a high-quality audio module 220, a general audio module 230 and a digital-analog converter 240.

Here, the multimedia player application 210, the general audio module 230 and the digital-analog converter 240 are performed or controlled by the first processor 122, and the high-quality audio module 220 is connected to the first processor 122 ) And the second processor 124. [0050] FIG.

The multimedia player application 210 may be an application that is executed upon playback of multimedia on a portable electronic device based on an Android operating system. The multimedia player application 210 can selectively instruct the sound source processing and output of the high-quality audio module 220 or the general audio module 230 according to the output direction selected by the user.

For example, the multimedia player application 210 may instruct the general audio module 230 to output a high-quality sound source according to a user's selection, or may instruct the high-quality audio module 220 to output a sound source having a general sound quality.

The multimedia player application 210 may be implemented as a launcher of a different type in a first mode for playing a sound source of normal sound quality by the Android operating system and a second mode for playing a high sound quality sound source.

At this time, the multimedia player application 210 transmits the signal to the application framework 232 supported by the Android operating system in the first mode, bypasses the signal transmission path in the second mode, and transmits the signal to the first high- Lt; / RTI >

Meanwhile, the digital signal D1 of a high sound quality sound source as shown in FIG. 3A may be interfered with by an executing program and service according to the Android operating system. That is, since the sampling rate of the high-quality sound source is higher than the sampling rate of the sound source format supported by the Android operating system, the processing time (T) is short, so that the processing time of another program or service Can be influenced by.

At this time, as shown in FIG. 3B, the output time of the digital signal D1 of the high-quality sound source may be delayed by a predetermined time? T1 according to processing of another program or service. Therefore, an error of the digital signal D1 of the high-sound-quality sound source and the digital signal D2 actually reproduced may be generated by a predetermined amplitude? A1 during the time corresponding to the error? T1 at the output time.

This amplitude error (? A1) acts as a noise during the reproduction of a high-quality sound source and adversely affects the reproduction of the original sound. That is, in FIG. 3A, an error is generated in the amplitude of the portion indicated by oblique lines according to the error? T1 at the output time point, thereby restricting reproduction of the original sound.

Here, the error? T1 at the output time may be different for each period (T) according to processing of another program or service occurring in the corresponding period. For example, in FIG. 3B, although the error of the output time point? T1 is shown only for nT to (n + 1) T sections, it can be seen that the error of the output time point is different for each period T.

In order to preclude such interference with other programs or services, the multimedia player application 210 may include a function limiter 212 that limits some of the functionality of the portable electronic device during high-quality playback. The function limiter 212 may terminate other programs or services not related to playback of the high-quality sound source and delete the programs or services from the memory.

The high-quality audio module 220 may include a first high-quality audio processing module 222 and a second high-quality audio processing module 224 in accordance with the role allocation by the first processor 122 and the second processor 124 .

The first high-quality audio processing module 222 is implemented by the first processor 122 and can process (decode) sound sources in formats not supported by the Android operating system. Here, since the first high-quality audio processing module 222 does not use the application framework 232, it can normally process (decode) sound sources in formats not supported by the Android operating system.

3C, the first high-quality audio processing module 222 outputs a digital signal D3 of a high-quality sound source in response to a function limited by the function restriction unit 212, It is possible to reduce the output time error of the output signal D3.

That is, since the occupancy rate of the first processor 122 can be sufficiently secured by terminating the other program or service not related to the reproduction of the high-quality sound source in the function limitation unit 212, the probability of occurrence of another program or service And in this state, the first high-quality audio processing module 222 can determine the output time point of the digital signal D3, thereby reducing the output time point error? T2 and accordingly the amplitude error? A2.

In FIG. 3C, for the sake of convenience, the error of the output time point (t2) is shown only for the nT to (n + 1) T periods, but the error of the output time point may be different for each period (T). That is, the output-time error? T2 may be different for each period (T) according to the processing of another program or service occurring in the corresponding period.

Here, the generated other program or service is not limited by the function restriction unit 212, and is a function for interacting with the user. For example, in the high-quality reproduction, the processing function for the input of the user, .

That is, as compared with the case where the high-quality reproduction apparatus 100 receives interference with another program or service as shown in FIG. 3B, the error? T2 at the output time is reduced and accordingly the amplitude By reducing the error, it is possible to reproduce sound quality closer to the original sound.

The second high-quality audio processing module 224 is implemented by the second processor 124 and can process and reproduce a high-quality sound source at a precise time. At this time, the second high-quality audio processing module 224 can perform playback while maintaining the format of the sound source without converting the sound source in a certain form.

At this time, the second high-quality audio processing module 224 adjusts the output signal of the first high-quality audio processing module 222 to a constant period T with respect to the sampling rate of the high-quality sound source, and outputs the adjusted signal in real time. That is, the second high-quality audio processing module 224 may adjust the output time point so as to minimize the error of the output time depending on the influence of the program or service being performed by the first processor 122.

The second high-quality audio processing module 224 is implemented by the second processor 124 and is controlled by an operating system different from the Android operating system, and in particular, is controlled by a real-time operating system, By improving the timing reliability, it is possible to output the digital signal D4 which is the same as the digital signal D1 of a high sound quality sound source and reproduce it with the same sound quality as a high sound quality sound source.

Thus, the second high-quality audio processing module 224 outputs a delay-free signal like an expensive RTOS (Real-Time OS) sound device, so that the high-quality audio module 220 is not fundamentally supported by the Android OS It is possible to perform audio reproduction of a PCM or PDM sound source having a bit depth of bits and a sampling rate of up to 384 kHz.

Such a high-quality audio module 220 is a DSD-type sound source which is 64 times as much as a CD-type, and is similar to a general DSD player, and can be converted into a native DSD to DSD 256 without converting it into a PCM method performed when the sound source is reproduced by the Android operating system. Can play.

That is, the portable electronic device based on the Android operating system having the high-quality reproduction apparatus 100 can reproduce a high-quality sound source without using the general audio module 230 including the audio framework 232 of the Android operating system, A sound can be output through the speaker.

As a result, the portable operating system based on the Android operating system having the high-quality reproduction apparatus 100 can support audio reproduction of a high-quality sound source which is not currently supported, including a media format fundamentally supported by the Android operating system.

In this way, the high-quality reproduction apparatus 100 independently implements the high-quality-quality dedicated mode by the high-quality audio module 220. Therefore, when it is necessary to reproduce a digital audio file of a new type including more information than the existing processing capacity, By upgrading only the multimedia player application 210 executed by the second processor 124 or the first processor 122, it is possible to improve the performance of high-quality reproduction of the portable electronic device based on the Android operating system.

Meanwhile, the second high-quality audio processing module 224 may reproduce a sound source in a format supported by the Android operating system. In this case, the multimedia player application 210 requests playback of the sound quality to the general audio module 230, and the second high-quality audio processing module 224 adjusts the digital signal processed by the general audio module 230 in a predetermined period It can be executed in real time.

Accordingly, the second high-quality audio processing module 224 can improve the sound quality close to the original sound without being affected by other programs or services executed in the Android operating system even when reproducing a general sound quality sound source.

The general audio module 230 may include an application framework 232, a general audio processing module 234, and an audio HAL (Hardware Abstract Layer) 236. The general audio module 230 is capable of processing a sound source having a bit depth of up to 24 bits and a sampling rate of 48 kHz, which are elements supported by the Android operating system.

The digital-analog converter 240 may convert an audio signal processed by the high-quality audio module 220 or the general audio module 230 into an analog signal to be output to the speaker 150 or an external output device, 1 conversion unit 242 and a second conversion unit 244. [

The first conversion unit 242 converts the PDM digital signal not supported by the existing Android operating system into an analog signal and the second conversion unit 244 converts the PCM digital signal supported by the existing Android operating system into the analog Signal.

That is, the digital-to-analog converter 240 selectively converts the digital audio signal output from the first conversion unit 242 (or the digital audio signal) according to the format of the reproduced sound source, regardless of whether the digital-analog conversion unit 240 is reproduced by the high- And the second conversion unit 244 to convert the digital signal into an analog signal.

For example, during playback by the high-quality audio module 220, signal conversion is performed through the first conversion unit 242, and signal conversion is performed through the second conversion unit 244 during reproduction by the general audio module 230. [ When the general sound source is processed using the first high-quality audio processing module 222, signal conversion can be performed through the second conversion unit 244 because the PCM method is maintained.

Here, the high-quality reproduction apparatus 100 may further include a connection interface for outputting an audio signal to an external output apparatus.

With such a configuration, the high-quality reproduction apparatus 100 can reproduce the high-quality audio at the original sound level even in the portable electronic device based on the Android operating system, so that the utility of the user can be increased. Therefore, in order to reproduce the high- It is possible to eliminate the inconvenience of having a separate reproducing apparatus and to reduce the cost of the additional purchase, thereby increasing the economic utility.

Hereinafter, a high-quality audio reproducing method for a portable electronic device based on the Android operating system of the present invention will be described with reference to FIG. 4 is a flowchart of a high-quality audio reproducing method for a portable electronic device based on an Android operating system according to an embodiment of the present invention.

A high-quality audio reproducing method 400 for a portable electronic device based on an Android operating system includes a step S410 of executing a high-quality player, a step S420 of limiting a function of the Android operating system and storing a previous state S420, To S450), and restoring the Android operating system function (S460 and S470).

More specifically, as shown in FIG. 4, first, the first processor 122 may execute a high-quality player according to a user's selection (step S410). At this time, the player to be executed is the multimedia player application 210, and can be performed by the Android operating system.

Next, the first processor 122 may limit some of the functions that are supported through the Android operating system to minimize the impact by other programs or services during high quality playback (step S420).

At this time, the first processor 122 may store environment information for a program or service not related to audio reproduction, and may terminate the corresponding program or service and remove the environment information from the memory. Accordingly, the first processor 122 can reside in the memory only a minimum number of services.

As described above, since the first processor 122 resides only the minimum service in the memory, it is possible to secure a maximum memory for high-quality audio reproduction by the first processor 122 and the second processor 124, The occupancy rate of the processor 122 can be minimized.

Next, the first processor 122 and the second processor 124 may play a high-quality sound source having a higher sampling rate and bit depth than the media format supported by the Android operating system (step S430). That is, the first processor 122 and the second processor 124 can reproduce high-quality sound sources in formats such as FLAC and DSD that are not supported by the Android operating system.

Here, the first processor 122 determines the output time point of the digital signal of the high-quality sound source in response to the limited function, thereby reducing the output time error of the digital signal of the high-quality sound source.

At this time, the first processor 122 may process only the minimal service residing in the memory, e.g., a function acting on the user. Here, the function that operates with the user may be a function for processing a user's input during high-quality reproduction such as screen touch.

Also, the second processor 124 may adjust the output signal of the first processor 122 to a predetermined period with respect to the sampling rate of the high-quality sound source, and output the adjusted signal in real time. As a result, the high-quality sound source can be output with substantially the same quality as the original sound without an error at the output time point.

Next, it is determined whether there is a function input of the Android operating system (step S440). If there is a function input of the Android operating system, for example, if the screen touch is performed by the user, the input function can be performed ).

If it is determined in step S440 that there is no input of the function of the Android operating system, the process returns to step S430 to continuously play the high-quality sound source.

Next, it is determined whether or not the high-quality player is terminated (step S460). If the high-quality player is not terminated, the process returns to step S430 to continuously play back the high-quality sound source.

As a result of the determination in step S460, if the high-quality player is terminated, that is, if the high-quality player is terminated according to the user's selection, the high-quality player is terminated and the limited function of the Android operating system can be restored (step S470).

That is, in step S420, when the function of the Android operating system is restricted, the program or service removed from the memory may be restored according to the stored environment information.

In this way, the high-quality audio can be reproduced at the original sound level even in the portable electronic device based on the Android operating system, so that the utility of the user can be increased. Therefore, in order to reproduce the original sound of high sound quality, It is possible to reduce the cost of additional purchase and increase the economic utility.

The above methods can be implemented by the first processor and the second processor of the high-quality playback apparatus 100 of the portable electronic device based on the Android operating system as shown in FIG. 1, and in particular, a software program Where such programs may be stored on a computer readable recording medium or transmitted by a computer data signal coupled with a carrier wave in a transmission medium or a communication network.

At this time, the computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. For example, ROM, RAM, CD-ROM, DVD-ROM, DVD- , A floppy disk, a hard disk, an optical data storage device, or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: high-quality reproduction apparatus 110: input section
115: communication unit 120:
122: first processor 124: second processor
130: storage unit 140: display unit
150: Speaker
210: Multimedia player application
212: Function Limit 220: High Quality Audio Module
222: first high-quality audio processing module 224: first high-quality audio processing module
230: General audio module 232: Application framework
234: general audio processing module 236: audio HAL
240: digital-analog conversion unit 242: first conversion unit
244:

Claims (10)

A main processor of a portable electronic device, comprising: a first processor driven by an Android operating system and controlling functions of the portable electronic device and reproducing a sound source in a format supported by the Android operating system; And
And a second processor for reproducing a high-quality sound source having a higher sampling rate and bit depth than the media format supported by the Android operating system,
Wherein the first processor limits a part of the functions of the portable electronic device supported through the Android operating system when the high sound quality sound source is reproduced and corresponds to the limited function to reduce an output time error of the digital signal of the high sound quality sound source Determines the output time point of the digital signal,
Wherein the second processor adjusts the output signal of the first processor to a constant frequency with respect to a sampling rate of the high-frequency sound source and outputs the same in real time. The method according to claim 1,
Wherein the first processor stores environment information for a program or service not related to audio reproduction when the high-quality sound source is reproduced, terminates the program or the service, and when the reproduction of the high- And restores the terminated program or service according to the stored environment information. The method according to claim 1,
Further comprising a digital-to-analog converter converting a digital signal of a sound source output from the first processor and the second processor into an analog signal. The method according to claim 1,
Wherein the first processor processes only the function of the second processor when the high-quality sound source is reproduced by the second processor. The method according to claim 1,
And the second processor is driven by an operating system different from the Android operating system. A portable electronic device based on an Android operating system having the high-quality audio reproducing apparatus according to any one of claims 1 to 5. A first processor driven by the Android operating system and a high-quality sound source having a higher sampling rate and bit depth than that of the sound source in the format supported by the Android operating system, and a second processor driven by an operating system different from the Android operating system A high-quality audio reproducing method for a portable electronic device,
Executing the high quality player by the first processor;
Limiting a portion of the functionality of the portable electronic device wherein the first processor is supported through the Android operating system; And
The second processor reproducing the high-quality sound source,
Wherein the reproducing step determines the output time point of the digital signal in response to the limited function so that the first processor reduces an output time error of the digital signal of the high sound quality sound source,
And the second processor adjusts the digital signal to a constant frequency in a cycle with respect to a sampling rate of the high-frequency sound source, and outputs the digital signal in real time. 8. The method of claim 7,
Wherein the limiting step stores environment information for a program or service not related to audio playback and terminates the program or service. 9. The method of claim 8,
And restoring the terminated program or service according to the stored environment information when the reproducing step is terminated. ≪ RTI ID = 0.0 > [10] < / RTI > 9. The method of claim 8,
Wherein the step of playing back only processes the function of the first processor with a user.

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