KR20080082085A - Audio apparatus and apparatus of digital audio data processing and method of the same - Google Patents

Abstract

An audio apparatus and an apparatus and a method for processing a digital audio file thereof are provided to complement loss of reproduction time by slowly reproducing at least one next frame. A method for processing a digital audio file comprises the steps of selecting reproduction of an audio file, slowly reproducing at least one frame following an error frame of the audio file, and displaying the degree of reproducing corresponding to the reproduction speed of the audio file according to the reproduction of the audio file. An apparatus for processing a digital audio file includes a user selection part(102) for selecting the reproduction of the audio file, and a controller which controls the slow reproduction of at least one next frame if an error frame is detected from the audio file when the audio file is reproduced according to the selection of the user selection part.

Description

Audio Apparatus and Apparatus of Digital Audio Data Processing And Method of the same}

1 is a control block diagram of a digital audio file processing apparatus according to an embodiment of the present invention;

2 is a control block diagram of a digital audio file processing apparatus according to another embodiment of the present invention;

3 is a state diagram of reproduction of a digital audio file according to an embodiment of the present invention;

4 is a state diagram of reproduction of a digital audio file according to another embodiment of the present invention;

5 is a control flowchart of a digital audio file processing method according to a first embodiment of the present invention;

6 is a control flowchart of a digital audio file processing method according to a second embodiment of the present invention;

7 is a control flowchart of a digital audio file processing method according to a third embodiment of the present invention;

8 is a control block diagram of an audio device according to another embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

16: counter 18: decoder

20: decoding control unit 24: playback speed control unit

200: main controller 202: user selection unit

204: display unit 206: audio file storage unit

50, 150, 250: codec unit 120, 220: decoder unit

10, 110, 210: Digital audio file processing device

12, 112, 212: file buffer

14, 114, 214: frame error detection unit

22, 122, 222: data buffer

The present invention relates to an audio device, a digital audio file processing device and a processing method thereof.

Typically, digital audio files are processed with frames as the minimum unit during playback. Such a digital audio file may cause an error in a frame due to data loss or corruption, and may cause an unexpected result such as noise in the case of an error frame, or when the digital audio file is reproduced. Thus, when an error frame is detected during file reproduction, the frame in which the error occurs is skipped and the next normal frame is processed.

However, if the error frame is not played, the playback time of the error frame is lost, so that the playback is performed at a higher speed than the original audio file, and the overall playback time is also reduced. Accordingly, there is a problem that an audio file including an error frame is different from the original when listening.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object thereof is to provide an audio device, a digital audio file processing device, and a processing method thereof, which enable the audio file to reproduce audio close to the original even when an error frame is included in the audio file. There is this.

According to an aspect of the present invention, there is provided a digital audio file processing apparatus comprising: a user selection unit for selecting a reproduction of an audio file; When the audio file is reproduced according to the selection through the user selection unit, when an error frame is found in the audio file, at least one next frame is controlled to be played slowly.

In addition, the above object, according to another field of the invention, the step of selecting the playback of the audio file; It can also be achieved by a digital audio file processing method comprising the step of slowly playing back at least one or more next frames for an error frame of the audio file.

In addition, an audio apparatus according to the present invention for achieving the above object includes a user selection unit for user selection; A storage unit for storing audio files; A frame error detector for detecting whether an error occurs in the frame when the audio file is played; A decoder which decodes the audio file in frame units into audio data and reproduces the audio file at a predetermined speed; When audio reproduction is selected through the user selection unit, the audio file stored in the storage unit is provided to the decoder unit, and when the error frame is found through the frame error detection unit, a playback time lost due to the error frame is calculated. The main controller may be configured to control the decoder so that at least one or more next frames are reproduced slowly so that the lost reproduction time is compensated for.

Hereinafter, an audio device, a digital audio file processing device, and a processing method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a control block diagram of a digital audio file processing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the digital audio file processing apparatus 10 processes an audio file according to a user's audio reproduction selection through the user selector 2 and converts the audio file into PCM (Pulse Code Modulation) data. The audio data is decoded and output to the codec unit 50. Here, the codec unit 50 converts the digital audio data into an analog audio signal and transmits the same to an user through an audio output device such as a speaker (not shown) or earphone (not shown).

The digital audio file processing apparatus 10 may include a file buffer 12 in which an audio file input for reproduction is stored, and a frame error detector 14 detecting whether an error of a frame of the audio file stored in the file buffer 12 occurs. A counter 16 for counting the number of error frames, a decoder 18 for decoding the audio file stored in the file buffer 12 on a frame basis, a data buffer 22 for storing the decoded audio data, Compensating the playback compensation time according to the number of error frames counted by the playback speed control unit 24 and the counter 16 to adjust the playback speed of the audio data so that the playback speed of the decoded normal frame is subsequently adjusted. And a decoding control unit 20 for controlling the playback speed control unit 24.

The audio file stored in the file buffer 12 is a digital audio file having a format such as MP3 (MPEG Audio Layer 3), WMA (Windows Media Audio), OGG (Ogg Vorbis), and the like. The body may include two frames and a tail indicating the end of the file. The header of an audio file includes the file type, version, sample rate, samples per channel, packed information, required bits, and free format. (free format) and the like may be included to provide control information to the decoding control unit 20. The frame constituting the body is a minimum unit for file reproduction, and the audio file stored in the file buffer 12 is provided to the decoder 18 in units of frames.

The frame error detector 14 detects whether data corruption or loss occurs in a frame of the audio file. Frame data may be corrupted for various reasons such as broken frames, data overflows, bad packets, and the like. Accordingly, the frame error detection unit 14 sequentially checks each frame of the audio file stored in the file buffer 12 according to the playback order to determine whether there is an error, and provides the error detection result to the decoding control unit 20. .

The counter 16 counts the number of error frames under the control of the decoding control unit 20.

The decoder 18 converts the audio file stored in the file buffer 12 in units of frames to generate audio data. Here, the audio data may be generated in the form of Pulse Code Modulation (PCM) data widely used in decoding techniques such as voice and music. In addition, the decoder 18 may be provided with one or more decoders such as an MP3 decoder, a WMA decoder, or an OGG decoder according to the format of the audio file.

The data buffer 22 stores the audio data converted by the decoder 18.

The playback speed control unit 24 may control the normal frame to be slowly played back by extending the time scale of the audio data. Accordingly, the playback speed control unit 24 adjusts the playback speed of the audio data stored in the data buffer 22 under the control of the decoding control unit 20, and then provides the audio data to the codec unit 50 to send it to the user. Allow the speed of the audio signal to be adjusted. On the other hand, the function of the playback speed control unit 24 can be designed to control the playback speed by the decoder 18 itself, depending on the design method of the decoder 18.

The decoding control unit 20 counts the number of error frames detected by the frame error detection unit 14 through the counter 16, and sequentially checks the next frames to search for the normal frame. When the normal frame is found, the decoding control unit 20 checks the number of counted error frames to calculate a reproduction compensation time, and the decoder 18 can reproduce the normal frame decoded and output for a time extended by the compensation time. The playback speed control section 24 is controlled. Here, the frame error detection unit 14 and the counter 16 functions may be mounted in the decoding control unit 20 in the form of software.

On the other hand, when the decoding control unit 20 detects a frame error by setting the playback speed of the normal frame according to the frame error detection, that is, the slow playback speed in advance, it is configured to delay the playback speed of the normal frame after the error frame. It is possible. Frame, which is a unit of playback of audio files, is set as a unit of time that is hard to be detected by the user. Therefore, it is recommended to set a slow playback speed in advance in consideration of a frame error that may occur and to apply it when an error frame occurs. It is possible. In such a configuration, the configuration of the counter 16 can be omitted, so that the system configuration can be simplified.

That is, the decoding control unit 20 compensates for the playback time missed by the error frame by delaying the playback speed of the normal frame so that the playback time of the entire audio file can match the playback time of the original audio file.

According to this configuration, when an error frame occurs, the digital audio file processing apparatus 10 of the present invention reflects the playback time that is missed when the next normal frame is reproduced, so that even if an error frame is included in the audio file, Ensure playback quality close to the file.

As described above, the digital audio file processing apparatus 10 of FIG. 1 according to an exemplary embodiment of the present invention has a conventional decoder configuration including a file buffer 12, a decoder 18, a data buffer 22, and the like. In the unchanged state, the decoding control unit 20 for calculating the compensation time according to the number of error frames and the playback speed control unit 24 and the frame error detection unit 14 for adjusting the playback speed can be controlled. This configuration compensates for the omission of playback time due to error frames.

Such configurations may be implemented in a combination of hardware and software, or may be implemented only in software.

2 is a control block diagram of a digital audio file processing apparatus according to another embodiment of the present invention, which illustrates a case where a decoder performs a frame decoding function, a compensation time calculation function, and a playback time control function.

As shown in FIG. 2, the digital audio file processing apparatus 110 decodes an audio file into audio data such as PCM (Pulse Code Modulation) data according to a user's audio reproduction selection through the user selector 102. Output to the codec unit 150 through the buffer (122). Here, the codec unit 150 converts the digital audio data into an analog audio signal and transmits the same to an user through an audio output device such as a speaker (not shown) or earphone (not shown).

The digital audio file processing apparatus 110 may include a file buffer 112 in which an audio file input for reproduction is stored, and a frame error detection unit 114 for detecting an error of a frame of an audio file stored in the file buffer 112. And a decoder unit 120 that decodes and outputs an audio file stored in the file buffer 112 so as to compensate for the lost playback time by calculating a playback time lost due to an error frame detected by the frame error detector 114. ).

The audio file input to the file buffer 112 is a digital audio file having a format such as MP3 (MPEG Audio Layer 3), WMA (Windows Media Audio), OGG (Ogg Vorbis), and the like. The body may include a body including a plurality of frames and a tail representing the end of the file. The header of an audio file includes the file type, version, sample rate, samples per channel, packed information, required bits, and free format. (free format) and the like may be included to provide control information to the decoder 120. The frame constituting the body is a minimum unit for file reproduction, and the audio file stored in the file buffer 112 is provided to the decoder unit 120 in units of frames.

The frame error detector 114 detects whether data corruption or loss occurs in a frame of the audio file. Frame data may be corrupted for various reasons such as broken frames, data overflows, bad packets, and the like. Accordingly, the frame error detection unit 114 sequentially checks each frame of the audio file stored in the file buffer 112 according to the playback order thereof to determine whether there is an error, and provides the error detection result to the decoder unit 120. do.

The decoder 120 may decode the audio file stored in the file buffer 112 in units of frames to generate audio data in the form of PCM (Pulse Code Modulation) data and control the playback speed of the audio data. The decoder 120 may include one or more decoders such as an MP3 decoder, a WMA decoder, or an OGG decoder according to the format of the audio file.

The decoder 120 checks the number of error frames detected by the frame error detector 114 and calculates a reproduction compensation time according to the amount of error frames. Accordingly, if a normal frame is found after the error frame, the decoder 120 sets a slow playback speed so that the normal frame can be reproduced for an extended period of time by the compensation time, and then the codec unit 150 through the data buffer 122. Output audio data. That is, the decoder 120 compensates for the playback time missed by the error frame by delaying the playback speed of the normal frame so that the playback time of the entire audio file can match the playback time of the original audio file.

As described above, in another embodiment of the present invention, the decoder 120 performs a decoding function and a playback speed compensation function of the audio file. Such a configuration can be configured by adding and setting respective functions to a conventional decoder, and can be implemented by hardware and software, or a combination of hardware and software according to a designer's design method.

3 and 4 are diagrams illustrating playback states of digital audio files according to the present invention. FIG. 3 is a diagram illustrating a case of calculating and compensating a playback time compensation process according to an error frame in units of frames, and FIG. 4 in units of time. The case of calculation and compensation is illustrated.

3 is a diagram illustrating a reproduction state of a digital audio file according to an exemplary embodiment of the present invention, in which a frame set of (a) is an original audio file which is input and stored in the file buffer 12 and a frame set of (b) is digital audio The configuration of the reproduced audio data processed through the file processing apparatus 10 is shown.

The original audio file (a) stored in the file buffer 12 is composed of N frames starting with F1, where frame 2 is an error frame. When the frame set (a) having such a configuration is stored in the file buffer 12, the decoding controller 20 recognizes the error frame F2 through the frame error detector 14.

Accordingly, when the error frame F2 is detected after the first frame F1 is played back at the normal playback speed, the decoding controller 20 reproduces the next normal frame F3, F4, F5 lost due to the error frame F2. Set slow to compensate for time, and play at slow playback speeds of F3 ', F4', and F5 '.

Here, the embodiment of FIG. 3 sets the playback speeds of the three frames F3, F4, and F5 to slow playback to compensate for the playback speed lost by one error frame F2, but this is merely a mere embodiment. However, the number of normal frames that are the target of slow playback can be arbitrarily set according to the quality and system efficiency of the audio signal to be played back during system design. For example, when one error frame is detected, it is possible to compensate by slowly replaying the speed of one normal frame detected at the next half speed at a half speed or slow playback of a number of normal frames proportional to the number of error frames. It is thereby possible to compensate for the lost playback speed. In addition, when an error frame is detected, it is possible to set a slower playback speed of all subsequent frames.

As such, when an error frame is detected, loss time due to an error frame may be compensated for by setting a playback speed of a predetermined number of normal frames input thereafter to slow playback. As described above, when the playback speed is compensated based on the number of frames, it may be usefully used for a file having a constant bit rate (CBR) format in which the encoding bandwidth is kept constant.

4 is a diagram illustrating a playback state of a digital audio file according to another embodiment of the present invention, which illustrates a case of calculating and compensating a play time compensation process based on an error frame in units of time.

The frame set of (a) is an original audio file which is input to and stored in the file buffer 12, and the frame set of (b) shows the configuration of the reproduced audio data processed by the digital audio file processing apparatus 10. .

The original audio file (a) stored in the file buffer 12 is composed of N frames starting with F1, where frame 2 is an error frame. When the frame set (a) having such a configuration is stored in the file buffer 12, the decoding controller 20 recognizes the error frame F2 through the frame error detector 14.

Thus, if the error control frame F2 is detected after the first frame F1 is played back at the normal playback speed, the decoding control unit 20 sets the next normal frame F3 slower than the normal playback speed and plays back at F3 '. do. Here, the playback speed of F3 'is a preset fixed value, but a slow playback speed that is slower than the original audio data (a) but difficult for a listener to recognize may be set.

The decoding control unit 20 checks whether the play time compensation is completed during the slow play, and maintains the slow play state when the play time compensation is not completed. Therefore, the next normal frame F4 is set to a slow play speed so that the F4 ' Is played. If it is determined that the playback time compensation is completed during the playback of F4 ', the decoding control unit 20 immediately changes the playback speed to the normal playback speed, so that the remaining part of the F4 frame of the original audio data (a) is the normal playback speed. Playback is performed at F4, and subsequent F5 is also played at normal playback speed.

As described above, according to another embodiment of the present invention, if an error frame is detected, the normal frame is set at a predetermined slow playback speed and played back, and it is determined that the compensation for the time lost during playback at the slow playback speed is completed. If so, you can switch back to normal playback speed. As such, when controlling the time unit rather than the frame unit, the present invention can be usefully applied to processing a digital file having a variable bit rate (VBR) format in which bandwidth changes.

5 is a control flowchart of a digital audio file processing method according to a first embodiment of the present invention, and shows a schematic control process of the present invention.

When playback of the audio file is started (S10), the decoding controller 20 verifies the frames of the audio file stored in the file buffer 12 in the playback order through the frame error detector 14 to determine whether an error frame exists. Check (S12).

If no error frame is found, the playback speed is set to the normal playback speed (S18), and the playback target frames are played back at one-way playback speed (S20).

On the other hand, if an error frame is found, the decoding control unit 20 does not reproduce the error frame, but calculates a playback time lost due to the error frame (S14).

The decoding control unit 20 sets the playback time of the remaining normal frame to a slow playback speed so as to compensate for the lost playback time (S16), and plays back the normal frames according to the set speed (S22).

The decoding control unit 20 determines whether the error correction is completed by the compensation of the lost reproduction time (S24), and when it is confirmed that the correction is completed, the decoding control unit 20 converts the reproduction speed back to the normal reproduction speed (S26).

The decoding control unit 20 checks whether the frame to be played back remains (S28), and terminates the audio playback when the frame to be played back remains (S30).

If the audio frame to be played remains, the process returns to step S12 again to check whether the frame is in error and repeats the error correction process accordingly.

As described above, the present invention compensates for the playback time lost due to an error frame by setting a playback speed of a subsequent normal frame to a slow playback speed when an error frame is found.

6 is a control flowchart of a method for processing a digital audio file according to a second embodiment of the present invention, in which a predetermined number of normal frames are counted according to a time lost due to an error frame by counting the number of error frames through a counter. This is an example of setting a slow playing time to compensate.

When playback of the audio file is started (S40), the decoding controller 20 verifies the frames of the audio file to be reproduced in the file buffer 12 in the playback order through the frame error detector 14 to determine whether an error frame exists. Check whether or not (S42).

Here, the error frame is not reproduced, and after counting the number of detected error frames (S44), the process returns to step S42 to check whether there is a frame to be played back and whether the corresponding frame is in error.

As a result of sequentially checking the frames of the audio file, if a normal frame without an error is detected, the decoding controller 20 checks whether the number of error frames counted up to now is 0 (S46).

If the number of error frames is zero, the decoding control unit 20 sets the audio data converted through the decoder 18 to be reproduced at a normal reproduction speed (S52).

On the other hand, if there is an error frame, the decoding control unit 20 calculates a reproduction compensation time according to the number of error frames (S48). Since the error frame is not reproduced, the reproduction time is missed by the number of error frames. Accordingly, the decoding controller 20 may calculate the reproduction time to be compensated through the number of error frames.

The decoding control unit 20 sets the reproduction speed of the normal frame to be slow through the reproduction speed control unit 24 so that the normal frame is extended and reproduced by the calculated compensation time (S50). In general, the playback time of an individual frame is reproduced in units of several ms to several tens of ms, so that the user may not recognize this when the number of error frames is not too large.

When the setting of the playback speed is completed, playback of the normal frame is started (S54), and it is determined whether playback of the current frame is completed (S56).

As a result of the determination, when the reproduction of the current frame is not completed, the decoding control unit 20 determines whether the current state is in error frame correction or whether the frame that was being corrected and is currently the last frame for correction (S58).

If the frame currently being reproduced is the last frame for correction, the decoding control unit 20 initializes the number of error frames of the counter 16 to 0, and switches the frame reproduction speed to the normal reproduction speed (S60). That is, when the frame for the last correction is being played back, the number of error frames is initialized and the normal playback speed is switched so that the next normal frame can be played back at the normal speed.

On the other hand, if playback of the current frame is completed, it is determined whether a playback target frame remains (S62). If it is determined that there is no playback target frame, playback of the audio file is terminated (S64). When it is determined that the frame to be played remains, the process returns to step S42 again, and the algorithm for counting and compensating for the number of error frames is repeated.

7 is a control flowchart of a method for processing a digital audio file according to a third embodiment of the present invention, in which the number of error frames is counted through a counter and the playback speed of a normal frame is set to a preset slow playback speed when an error frame is found. By setting, the slow reproduction is maintained until the loss time is compensated for.

When playback of the audio file is started (S70), the decoding controller 20 verifies the frames of the audio file to be reproduced in the file buffer 12 in the playback order through the frame error detector 14 to determine whether an error frame exists. Check whether or not (S72).

Here, the error frame is not played, and after counting the number of detected error frames (S74), the process returns to step S72 to check whether there is a frame to be played back and whether or not the corresponding frame is in error.

As a result of sequentially checking the frames of the audio file, if a normal frame without an error is detected, the decoding controller 20 checks whether the number of error frames counted up to now is zero (S76).

If the number of error frames is zero, the decoding control unit 20 sets the audio data converted through the decoder 18 to be reproduced at the normal reproduction speed (S82).

On the other hand, if there is an error frame, the decoding control unit 20 calculates a reproduction compensation time according to the number of error frames (S78). Since the error frame is not reproduced, the reproduction time is missed by the number of error frames. Accordingly, the decoding controller 20 may calculate the reproduction time to be compensated through the number of error frames.

The decoding control unit 20 sets the reproduction speed of the normal frame to be reproduced at a predetermined slow reproduction speed (S80). Here, although the slow playback speed is slower than the normal playback speed, the listener may be preset to a value that is difficult to recognize.

When the setting of the play speed is completed, playback of the normal frame is started (S84), and it is checked whether or not error correction is completed (S86).

Accordingly, when it is determined that error correction is completed, the decoding control unit 20 initializes the number of error frames of the counter 16 to 0, and switches the frame reproduction speed to the normal reproduction speed (S88). That is, in the present embodiment, when the playback time lost by the frames that are played slowly is compensated, the decoding control unit 20 immediately returns the frame playback speed to the normal playback speed.

After that, it is checked whether the playback of the current frame is completed (S90). When the playback of the current frame is completed, it is determined whether a playback target frame remains (S92). The playback ends (S94).

If it is determined that the frame to be played remains, the process returns to step S72 again, and the algorithm for counting and compensating for the number of error frames is repeated.

8 is a control block diagram of an audio device according to the present invention, where the audio device may include any medium capable of playing digital audio files such as a car audio, an MP3 player, a PMP, a PDA, a mobile phone, and the like.

As shown in FIG. 8, the audio device of the present invention includes a user selection unit 202 and a display unit 204, an audio file storage unit 206 in which digital audio files are stored, and correction for error frames. A digital audio file processing apparatus 210 and a codec unit 250 for converting digital audio data processed by the digital audio file processing apparatus 210 into an analog audio signal and outputting the analog audio signal to a speaker SPK, and controlling them. It includes a main control unit 200.

The user selector 202 includes a button, a keypad, a touch panel, and the like for selecting a function of the audio device, and outputs a selection signal selected by the user to the main controller 200.

The display unit 204 may display a state of the audio device, an operation mode, information of an audio file being played, and the like under the control of the main controller 200. Accordingly, in the case of the display unit 204 in which the elapsed time of the audio file is displayed, if the audio file is played slowly due to an error frame, the elapsed time may also be displayed in the display unit 204 under the control of the main controller 200. In the slow playback speed section, the time may be displayed to go slowly. In addition, even when the reproduction level of the audio file is displayed, the main control unit 200 may control to display the reproduction state in the slow reproduction speed section.

The audio file storage unit 206 stores a digital audio file to be played back and may be configured using a nonvolatile memory such as a flash memory.

The digital audio file processing apparatus 210 decodes the digital audio file stored in the audio file storage unit 206 into audio data such as PCM (Pulse Code Modulation) data under the control of the main control unit 200. Will output

The digital audio file processing apparatus 210 may include a file buffer 212 in which an audio file input for playback is stored, and a frame error detector 214 for detecting an error of a frame of an audio file stored in the file buffer 212. And a decoder 220 for decoding the audio file stored in the file buffer 212 at a predetermined playback speed, and a data buffer 222 for storing the decoded audio data.

When the audio reproduction is selected through the user selector 202, the main controller 200 provides the digital audio file stored in the audio file storage 206 to the decoder 220 through the file buffer 212, and the frame. If an error frame is found through the error detector 214, a playback time lost due to the error frame is calculated. The main controller 200 may compensate for the loss of the playback time due to the error frame by controlling the decoder 220 to reproduce at least one or more next frames slowly so that the lost playback time is compensated.

With this arrangement, when an error frame occurs, the audio device of the present invention reflects the playback time that is missed when the next normal frame is reproduced, so that even if an error frame is included in the audio file, the playback quality close to the original file is achieved. I can guarantee it.

Even if there are many error frames, the audio device of the present invention can sufficiently compensate for the playback time missed upon playback of the next normal frame. Therefore, the user may feel close to the original file even when there are many error frames in the audio file.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

As described above, the audio device, the digital audio file processing apparatus, and the processing method of the present invention control the playback speed by reflecting the playback time missed when an error frame occurs during the next normal frame playback. .

Accordingly, even when an error frame is included in the audio file, audio close to the original can be reproduced.

Claims (21)

Selecting playback of the audio file; Slowly playing at least one or more next frames with respect to an error frame of the audio file. The method of claim 1, And displaying a reproduction degree corresponding to a reproduction speed of the audio file according to the reproduction of the audio file. The method of claim 1, Counting the number of error frames; Sequentially checking next frames of the error frame to search for a normal frame; And calculating a playback time lost based on the counted number of error frames when the normal frame is found. The method of claim 3, wherein And initializing the number of counted error frames when the lost playback time is compensated for. The method of claim 1, The slow playing of the at least one or more next frames may include setting and setting a play speed of the normal frames searched after the error frame to a preset slow play speed. Checking whether the lost playback time is compensated while playing the normal frames at the slow playback speed; And if it is determined that the lost playback time is compensated, setting the playback speed of the normal frame to a normal playback speed. The method of claim 1, Slowly playing the one or more next frames, And slowly playing back a normal number of frames proportional to the number of error frames. The method of claim 1, Slowly playing the at least one next frame may include: And reproducing the lost playback time by reproducing all normal frames searched after the error frame at a slow playback speed proportional to the number of error frames. The method of claim 7, wherein Calculating a playback time lost due to the another error frame when another error frame is found while playing the normal frame at the slow playback speed; And reproducing the lost playback time by reproducing all normal frames retrieved after the another error frame at a slower playback rate proportional to the number of further error frames. Way. A user selector for selecting playback of an audio file; And a controller for controlling at least one next frame to be played slowly when an error frame is found in the audio file when playing the audio file according to the selection through the user selection unit. The method of claim 9, And a frame error detector for detecting an error of the frame and outputting a detection result to the controller when playing an audio file configured in units of frames. The method of claim 9, Further comprising a display unit for displaying the elapsed time according to the playback of the audio file, And the control unit controls the playback time displayed on the display unit to slowly elapse so that the slow playback time is reflected due to the error frame. The method of claim 9, A decoder which decodes the frame into playable audio data; And the control unit controls the frame to be reproduced through the decoder. The method of claim 9, A counter unit for counting the number of error frames; And the controller calculates a lost playback time based on the counted number of error frames. The method of claim 13, The control unit, And the counter unit initializes the number of the error frames when the lost reproduction time is compensated for. The method of claim 9, The control unit, The playback speed of the normal frames searched after the error frame is set to a predetermined slow playback speed, and when it is determined that the lost playback time is compensated during the playback at the slow playback speed, the playback speed of the normal frame Digital audio file processing apparatus characterized in that for playing at a normal playback speed. The method of claim 9, The control unit, And controlling the number of normal frames to be slowly played back in proportion to the number of error frames so that the lost playback time is compensated for. The method of claim 9, The control unit, And control all normal frames searched after the error frame to be reproduced at a slow playback speed proportional to the number of error frames so that the lost playback time is compensated for. The method of claim 17, The control unit, If another error frame is found while playing the normal frame at the slow playback rate, a playback time lost due to the another error frame is calculated, and all normal frames retrieved after the another error frame are returned to the another frame. A digital audio file processing apparatus characterized by controlling to be played at a slow playback speed proportional to the number of error frames. A user selector for selecting a user; A storage unit for storing audio files; A frame error detector for detecting whether an error occurs in the frame when the audio file is played; A decoder which decodes the audio file in frame units into audio data and reproduces the audio file at a predetermined speed; When audio playback is selected through the user selection unit, the audio file stored in the storage unit is provided to the decoder unit, and when the error frame is found through the frame error detection unit, a playback time lost due to the error frame is displayed. And a main control unit for calculating and controlling the decoder unit so that at least one or more next frames are reproduced slowly so that the lost reproduction time is compensated for. The method of claim 19, Further comprising a counter for counting the number of error frames detected through the frame error detection unit, The main controller calculates a lost playback time based on the counted number of error frames. The method of claim 19, The main fisherman, And control the number of normal frames to be played slowly in proportion to the number of error frames so that the lost playback time is compensated for.

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