KR20070068097A - Multimedia data playback device for having random play function of music based record of selection - Google Patents

Abstract

A multimedia data player having a random play function based on a selection history is provided to reflect preference according to the selection history of a user and enhance a play probability of multimedia data with high preference. A storing unit(120) stores a plurality of multimedia data and preference information mapped to the multimedia data. An input unit(110) receives a selection command or a skip command for the multimedia data. A preference calculating unit(130) updates the preference information mapped to the multimedia data according to the selection command or the skip command. A control unit(170) generates a play random number within a range of a set value including the preference information, and reads the mapped multimedia data corresponding to the play random number from the storing unit(120). A decoding unit(140) decodes the read multimedia data by using designated algorithm. A sound output unit(150) outputs the decoded multimedia data.

Description

Multimedia data playback device for having random play function of music based record of selection}

1 is a block diagram showing an apparatus for reproducing multimedia data according to an exemplary embodiment of the present invention.

FIG. 2 is an illustration of assigning identical preference information individually to any audio files according to one preferred embodiment of the present invention. FIG.

3 is an exemplary diagram in which the same preference information is assigned for each song within a random value according to another exemplary embodiment of the present invention.

4 is a diagram illustrating a preference increase and decrease according to an increase in a preference of a j-th audio file according to an embodiment of the present invention.

5 is an exemplary view of increasing and decreasing the preferences of the j-th song when using a random value according to another embodiment of the present invention.

Figure 6 is a flow chart showing a basic arbitrary selection method according to an embodiment of the present invention.

7 is a flow chart showing an arbitrary selection method according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: input unit

120: storage unit

130: preference calculation unit

140: decryption unit

150: sound output unit

160: display unit

170: control unit

The present invention relates to a multimedia data reproducing apparatus, and more particularly, to a multimedia data reproducing apparatus having an arbitrary selection function based on a user's selection history.

Today, the advances in memory-related semiconductor technology are evolving differently, as if to prove Moore's law. With this development, the storage capacity of portable storage devices (e.g. flash memory) has also increased significantly, enabling data storage up to several gigabytes. Accordingly, various products are being released that can store and reproduce a plurality of multimedia data as well as devices for reproducing audio data such as MP3. Most of the devices for reproducing such multimedia data have a built-in random play function, but they are reproduced while ignoring the history of the user's selection, thereby reducing the utility of the user.

Accordingly, an object of the present invention for solving the above problems is a multimedia data playback apparatus having a random selection function based on the selection history that can increase the reproduction probability of multimedia data with high preference by reflecting the preference according to the user's selection history. To provide.

Other objects of the present invention will be easily understood through the description of the following examples.

In order to achieve the above object, according to an aspect of the present invention, there is provided a multimedia data playback apparatus that can store the preference information of the multimedia data according to the user's selection history and apply the preference information at the time of random playback.

According to a preferred embodiment of the present invention, there is provided a multimedia data reproducing apparatus having a random play function, comprising: a storage unit storing a plurality of multimedia data and preference information mapped to the multimedia data; An input unit configured to receive a selection command or a skip command for the multimedia data; A preference calculator configured to update the preference information mapped to the multimedia data according to the selection command or the skip command; A controller configured to generate a play random number within a range of a set value including the preference information and to read the multimedia data mapped to the play random number from the storage; A decoder which decodes the read multimedia data using a predetermined algorithm; And a sound output unit configured to output the decoded multimedia data.

The input unit may include one or more function buttons of play, pause, stop, mute, prev, and next.

The preference information may be any numeric information mapped to the multimedia data or an arbitrary number of ranges.

The preference calculator may increase the preference information for the multimedia data when the selection command is input, and decrease the preference information for the multimedia data when the skip command is input.

The preference calculator may update the preference information by using a probability value set to increase or decrease the preference information according to the selection command or the skip command.

If there is no preference information mapped to the reproduction random number, the controller may regenerate the reproduction random number.

According to another aspect of the present invention, there is provided a method in which a multimedia data reproducing apparatus can select preference information for the multimedia data according to an arbitrary multimedia data selection command from a user and select the multimedia data by applying the preference information. .

According to a preferred embodiment of the present invention, an arbitrary playback method of a multimedia data reproducing apparatus, the method comprising: generating a random number of playing within a range of a set value including preference information mapped to a plurality of multimedia data stored in a storage unit; Generating a reproduction random number within a total sum of the preference information; Reading the multimedia data mapped to the reproduction random number from the storage unit; Decoding the read multimedia data according to a set algorithm; And outputting the decoded multimedia data.

Receiving a selection command or a skip command of the multimedia data from a user; And increasing the preference information when the selection command is input, and decreasing the preference information when the skip command is input.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The multimedia data reproducing apparatus 100 according to the present invention described below corresponds to an audio data selection command from a user (for example, a preset command associated with a corresponding function button when a preset function button is pressed). By generating preference information of the user for the audio data, the audio data may be selected and provided to the user according to the corresponding preference information.

In the following description, the same or corresponding elements will be described with the same reference numerals regardless of the reference numerals in the description with reference to the accompanying drawings.

1 is a block diagram of an apparatus for reproducing multimedia data according to an exemplary embodiment of the present invention, and FIG. 2 is a same preference value individually (for each song) for arbitrary songs according to an exemplary embodiment of the present invention. 3 is an exemplary diagram in which the same preference value is assigned to each song within a random value (arbitrary information) according to another exemplary embodiment of the present invention, and FIG. 4 is j according to an exemplary embodiment of the present invention. FIG. 5 is a diagram illustrating a preference increase and decrease according to an increase in the preference of the first song, and FIG. 5 is a diagram illustrating a preference increase and decrease according to an increase in the preference of the j-th song when using a random value according to another embodiment of the present invention.

As shown in FIG. 1, the multimedia data reproducing apparatus 100 according to the present invention includes an input unit 110, a storage unit 120, a preference calculator 130, a decoder 140, and an audio output unit 150. , A display unit 160 and a controller 170.

The multimedia data reproducing apparatus 100 according to the present invention is an MP3 player capable of playing arbitrary audio files (for example, MP3, AAC (Advanced Audio Coding), etc.), CDP (Compact Disk Player), PMP (Personal Multimedia Player). In addition, the same may be applied to a device capable of playing an audio file (for example, a computer, a laptop, etc.).

In this specification, the multimedia data reproducing apparatus 100 focuses on reproducing an audio file. However, the multimedia data may be arbitrarily reproduced. In addition, hereinafter, the random reproducing function will be collectively described as a random reproducing function.

The input unit 110 may receive a function selection command (eg, play, pause, stop, etc.) for controlling an operation of the multimedia data reproducing apparatus 100 from a user. Means. For example, input 110 may include one or more function buttons (or function keys, for example, play, pause, stop, mute, prev, next ( next), etc.) or in the form of a touch screen. In addition, the input unit 110 may receive a list selection command of an audio file to be played back from the user through the multimedia data reproducing apparatus 100 and transmit the received command to the controller 170.

 The storage unit 120 may include an operating program of the multimedia data reproducing apparatus 100, one or more audio files (eg, MP3, AAC, etc.), a predetermined algorithm, an application installation file for playing the audio file, and an audio file playlist. The preference information mapped corresponding to the audio file and the overall preference information including the preference information of each audio file are stored.

In the present specification, the audio file is described in that the audio file is randomly accessed by the user and is stored in the storage unit 120 that can record, change, or delete data. It may be.

When the selection command of an arbitrary audio file is input by the control of the controller 170, the preference calculator 130 updates the preference information of the corresponding audio data by a predetermined algorithm and transmits the same to the controller 170. For example, if a user selects an audio file selection command, the preference calculator 130 may increase the preference information of the corresponding audio file under the control of the controller 170. If a skip command of an audio file is input from the user, the preference calculator 130 may reduce the preference information of the corresponding audio file under the control of the controller 170.

In the present specification, an "audio file selection command" is a function button (e.g., prev) set corresponding to a play inputted from a user to play an audio file, and to listen to the audio file again. In the case of pressing, it will be defined as a predetermined command transmitted to the control unit 170 through the input unit 110. In the present specification, the audio file selection command is described as limited to pressing a function button corresponding to play and listen again (for example, prev). However, the audio file selection command is preset according to the interval repetition according to an implementation method. When a function button is set to play or repeatedly listen to an audio file, such as when a function button is pressed, it may be a predetermined command transmitted to the control unit 170 through the input unit 110.

In addition, the "skip command" is used when the user presses a function button (for example, Next) provided in the input unit 110 to play another audio file while the audio file is being played. It will be defined as a predetermined command that is transmitted to the control unit 170 through the (110). In the present specification, the skip command and the next song selection command are defined as the same command and used interchangeably. That is, the skip command may stop the playback of the audio file being played and press the preset function button to play another audio file or press the preset function button to skip an arbitrary audio file through the input unit 110. It may be a predetermined command transmitted to the controller 170.

In addition, the preference calculator 130 may calculate and transmit the overall preference value corresponding to the preference information mapped to the respective audio files under the control of the controller 170 according to an implementation method, and transmit the calculated preference value to the controller 170. .

In addition, according to an implementation method, the preference calculator 130 may include a preference storage unit (not shown) that stores preference information for each audio file. However, in the present specification, it will be described focusing on what is stored in the storage unit 120.

First, a method of updating preference information according to a user's selection history after initially assigning the same preference information for each audio file will be briefly described. As shown in FIG. 2, when n audio files exist in the storage unit 120, the same preference information may be assigned to each audio file as an initial value. Referring to FIG. 2, preference information is assigned to "10" for n audio files. In this state, it is assumed that the user presses a random play function button preset in the multimedia data reproducing apparatus 100 to select and play an audio file (that is, for example, Let's call it 1 audio file).

In this case, when a skip command is input from the input unit 110 while the first audio file is being played, the controller 170 skips the first audio file, generates a preference information reduction command, and transmits the command to the preference calculator 130. The preference calculator 130 receiving the command to reduce the preference information for the first audio file from the controller 170 decreases the preference information for the first audio file and controls the storage unit 120 under the control of the controller 170. The preference information for the first audio file may be stored.

If the first audio file is pressed and the function button for re-listening the first audio file is reproduced, the input unit 110 may generate an audio file selection command and transmit it to the controller 170. The controller 170 receiving the audio file selection command may increase the preference information by recognizing that the user wants to hear the first audio file again.

In FIG. 4, as shown in FIG. 2, the user selects the j-th song while the same preference information is assigned to the n audio files, thereby increasing the preference of the j-th song by '1'. As described above, after assigning the same preference value as the initial value for each audio file, the preference information of the audio file that is selected and played back by the user is increased, and the preference of the audio file skipped by the user is increased. Information can be updated by reducing it. As a result, the audio files selected by the user may increase the preference information, and as a result, may increase the probability of being reproduced during random playback.

In addition, the preference calculator 130 may calculate an arbitrary probability value so that the preference increase and / or decrease according to the selection of an arbitrary audio file occurs slowly and apply it when the preference value is increased and / or decreased. For example, the input unit 110 may correspond to a predetermined menu (for example, a menu implemented through a user interface (UI)) or a function button corresponding to a user's preference quick application, slow application, and non-application. The preference application information may be generated and transferred to the preference calculator 130 through the controller 170. Accordingly, the preference calculator 130 applies weights to increase and / or decrease the preference information corresponding to any song by using the preference application information input from the input unit 110 under the control of the controller 170. can do.

For example, if the user presses a preset function button corresponding to the quick application of preferences, the input unit 110 generates preference application information corresponding to the fast application of preferences to the preference calculator 130 through the control unit 170. I can deliver it. If the fast application of preferences is to increase the preference information each time an audio file selection command is input, for example, the preference calculator 130 may increase the preference information for the corresponding audio file whenever the audio file selection command is input. have.

However, if a preset function button is pressed corresponding to the slow application of preference, the input unit 110 may generate preference application information corresponding to the slow application of preference and transmit it to the preference calculator 130 through the control unit 170. . For example, the preference calculator 130 assumes that frequency information determined according to the preference application is, for example, "10". Then, the preference calculator 130 may control the audio file (that is, for example, only when the audio file selection command is input in multiples of 10 with respect to the audio file from the input unit 110 under the control of the controller 170). The preference information for the 10th, 20th audio file selection command or the 10th, 20th skip command, etc. may be updated.

As another example, the preference calculator 130 may update the preference information for the audio file corresponding to the audio file selection command according to an arbitrary probability value generated by the random number.

As described above, the occurrence frequency probability value corresponding to the increase and / or decrease of the preference information of any audio file may be calculated and used to increase and / or decrease the preference information. The preference information may be set to increase and / or decrease according to the number of inputs.

In another embodiment, the update corresponding to the increase and / or decrease of the preference information of an arbitrary song may be set differently (that is, by applying different algorithms) to update.

The decoder 140 is a means for decoding audio data input from the controller 170 by using a predetermined algorithm.

The sound output unit 150 is a means for reproducing and outputting an audio file under the control of the controller 170. For example, the sound output unit 150 may be a speaker. Of course, the sound output unit 150 may include an audio output terminal (not shown), and when an earphone or the like is coupled to the corresponding audio output terminal, the audio output unit 150 may reproduce and output an audio file through the corresponding earphone.

The display unit 160 may be a liquid crystal display (LCD) as a means for outputting data by any one or a combination of two or more of letters, numbers, and image data.

The controller 170 is a component of the multimedia data reproducing apparatus 100 according to the present invention (for example, the input unit 110, the storage unit 120, the preference calculator 130, the decoder 140). , The sound output unit 150, the display unit 160, and the like.

In the present specification, the "playback random number" is defined as any random number generated by the controller 170 within a preset range of values corresponding to the preference information for each audio file.

For example, the playback random number may be generated within a range of the total preference value by calculating the total preference value by adding preference information for each audio file, or may be generated within a range of a preset maximum value.

In addition, the control unit 170 calculates a total preference value by adding the preference information of the respective audio files from the preference calculator 130 to generate a reproduction random number within the range of the overall preference value and map the corresponding random number. Control to read and output audio files.

6 is a flowchart illustrating a basic random selection method according to an embodiment of the present invention. Hereinafter, the same preference information is assigned to the plurality of audio files stored in the storage unit 120 as initial values, and then a user selects an arbitrary audio file through the input unit 110 (ie, selects an audio file). Command) increases the affinity information for the audio file, and if a skip command (for example, a command set corresponding to the Next button) of an audio file is input, decreases the affinity information of the corresponding audio file. The process of doing so will be explained.

Also, the multimedia data reproducing apparatus 100 randomly reproduces the audio files stored in the corresponding folder (list) by receiving a command for selecting a folder (list) in which a plurality of audio files are stored through the input unit 110 from the user. We will focus on performing the function.

 In operation 610, the controller 170 selects an audio file stored in a playback folder (list), reads the audio file from the storage 120, and decodes the audio file through the decoder 140 to output an audio output unit ( Output through 150). For example, audio files that have never been played are initially assigned the same preference value, so that if randomly selecting any audio file at random playback, all of them can be selected with the same probability.

Accordingly, the controller 170 selects one audio file from among a plurality of audio files stored in a folder (list) by an algorithm such as random value random number or random number audio file selection by random number, and then decodes the decoder 140. After decoding through the audio output unit 150 may be output. In this case, since the audio file is not selected by the user, the preference information mapped to the audio file may not be updated.

In operation 615, when the input unit 110 receives any one of an audio file selection command, a skip command, and an end command corresponding to a song played from the user, the input unit 110 transmits the input to the control unit 170. Determine the type of command entered through

If the command input from the input unit 110 is an audio file selection command, in step 620, the control unit 170 generates a preference increase command and increases it to the preference calculator 130 to increase the preference information of the audio file being played. . Here, the preference increasing command may include information about the audio file (eg, name of the audio file, index information of the audio file, etc.) to increase the preference information. The preference calculator 130 receiving the preference increase command input from the controller 170 increases the preference information for the corresponding audio file by using a predetermined algorithm and stores the same in the storage 120 under the control of the controller 170. do. The flow then advances to step 610.

As shown in Fig. 2, assume that the same preference value is assigned to all audio files stored in a folder (list), respectively. And, suppose that the audio file selection command is set to update (increase) preference information for all audio files. Then, the preference calculator 130 increases the preference information for the corresponding audio file and stores the increased preference information in the storage 120 through the controller 170. For example, if a selection command of the j-th audio file is input, the preference information of the j-th audio file may be increased and stored in the storage 120 after being increased as shown in FIG. 4.

If the command input from the input unit 110 is a skip command, in step 625, the controller 170 generates a preference decrease command and transmits it to the preference calculator 130 to reduce the preference information of the audio file being played. The preference calculator 130, which receives the command to reduce the preference from the controller 170, reduces the preference information mapped to the audio file being played using the determined algorithm, and controls the storage unit 120 under the control of the controller 170. Reduction also stores preference information. The process then proceeds to step 610.

However, if the command input from the input unit 110 is a termination command, the controller 170 ends the performance of the multimedia data reproducing apparatus 100.

Of course, if a command corresponding to a pause, mute, etc. other than this is input, the controller 170 controls the multimedia data reproducing apparatus 100 to perform an operation corresponding to the corresponding function, and then executes the corresponding function. If a command to release is inputted, it may be controlled to perform an operation previously performed as it is.

As described above, after allocating the same preference information to all songs, the audio file selection command increases the preference information for any song input, and the song to which the skip command is input decreases the preference information according to the user's selection history. The preference information may be updated.

자연수가 표현할 수 있는 최대 값인

의 범위를 N개의 영역으로 할당하여 각각의 곡에 각각의 영역을 할당하여 각각의 오디오 데이터의 선호도 정보를 갱신하도록 할 수도 있다. 본 명세서에서는

의 범위를 N개의 영역으로 할당하여 배정하는 것을 중점으로 설명하고 있으나 그 외에

등의 다른 범위로 할당할 수도 있다.In another embodiment, assume that N pieces of music are stored, as shown in FIG. Here, assume that N is a natural number of 10,000 or less. At this time,

Is the maximum value that a natural number can represent

The range of may be allocated to N regions so that each region is assigned to each song to update the preference information of each audio data. In this specification

The explanation focuses on allocating and assigning the range of N to N areas.

It can also be assigned to other ranges.

FIG. 3 illustrates that the audio file preference information is mapped to each of a number of regions, respectively, corresponding to N audio files. The same number of sizes may be allocated and allocated as shown in FIG. 3. In the example of FIG. 3, the increased preference information of the j-th audio file is illustrated in FIG. 5.

7 is a flowchart illustrating an arbitrary selection method according to a preferred embodiment of the present invention. Hereinafter, it will be described on the assumption that preference information according to a user's selection is reflected on audio files stored in the multimedia data reproducing apparatus 100. In addition, it is assumed that preference information for each audio file is stored in the storage 120 using, for example, an array and a buffer.

In operation 710, the preference calculator 130 may add preference information for each audio file stored in the storage unit 120 under the control of the controller 170 to add up a total preference value (hereinafter, referred to as “total preference value”). This will be referred to as output) and transferred to the control unit 170.

In step 720 to step 730, the controller 170 generates a random number of reproduction within the range of the overall preference value input from the preference calculator 130.

If the region of the preference information for each audio file is each divided within a range of a predetermined maximum value according to an implementation method, step 710 may be omitted. In this case, the controller 170 may generate a reproduction random number within a range of a predetermined maximum value in steps 720 to 730.

For example, as illustrated in FIG. 4, the preference information is set to "10" for each audio file, and ten audio files are stored for convenience of understanding and description, and the fifth audio file may be stored. Assume that only preference information is "11". In this case, the preference calculator 130 may calculate the overall preference value by using the preference information stored in the storage 120 corresponding to the audio files under the control of the controller 170. For example, the preference calculator 130 may calculate “101” as the overall preference value and transmit the calculated value to the controller 170.

The controller 170 receiving the overall preference value from the preference calculator 130 generates a random number to play within the range of the overall preference value in order to select an arbitrary audio file to be played. For example, suppose the generated random number is "51". The controller 170 selects an audio file to be played using the generated random number. Hereinafter, a first audio file stored in the storage unit 120 may be a first audio file, a second audio file may be a second audio file,... The n th audio file is referred to as an n th audio file.

In addition, the preference information stored in correspondence with the first audio file may include first preference information, the preference information stored in correspondence with the second audio file may include second preference information,. For example, preference information stored corresponding to the n-th audio file may be referred to as n-th preference information.

In addition, a value obtained by subtracting the first preference information from the reproduction random number generated by the controller 170 based on the total preference value is called a first selection music random number, and a value obtained by subtracting the second preference information from the first selection music random number,. The value obtained by subtracting the nth preference information from the n−1th music selection random number is referred to as an nth music selection random number.

For example, since the playback random number is "51", the controller 170 reads out the first preference information stored corresponding to the first audio file and compares it with the playback random number. If the reproduction random number is included in the range of the first preference information, the controller 170 reads the first audio file mapped corresponding to the first preference information and transmits the first audio file to the decoder 140.

However, if the reproduction random number is not included in the range of the first preference information (that is, a value exceeding the first preference information), the controller 170 calculates the first selection music random number by subtracting the first preference information from the reproduction random number. do. The controller reads the second preference information stored corresponding to the second audio file to determine whether the first selection random number is within the range of the second preference information.

That is, if the playback random number is "51" and the first preference information stored corresponding to the first audio file is "10", since the playback random number is larger than the first preference information, the controller 170 may determine the first preference in the playback random number. By subtracting the information, 41 can be calculated as the first random music random number. The controller 170 reads out the second preference information and compares the second preference information with the first selection music random number to determine whether the second preference information is included in the second preference information.

Repeated in this manner, the fourth random music random number is 11. At this time, the controller 170 reads the fifth preference information and compares it with the fourth random music random number to determine whether it is included in the fifth preference information. Since the fourth random music random number is included in the range of the fifth preference information, the controller 170 reads the fifth audio file mapped to the fifth preference information and transmits the fifth audio file to the decoder 140.

In operation 740, the decoder 140 decodes the audio file read and input from the controller 170 using a predetermined algorithm and outputs the audio file through the sound output unit 150 under the control of the controller 170. In the present specification, a method of updating and comparing a playback random number by subtracting preference information from a reproduction random number is used. However, according to an implementation method, an audio file corresponding to the reproduction random number may be read and output by accumulating the preference information and comparing the reproduction random number.

이라고 가정하자. 그러면, 각각의 오디오 파일들은 도 3에 예시된 바와 같은 선호도 정보가 배 정될 수 있다. In another embodiment, suppose that the range areas of preference information for each audio file are equally assigned within the range of a predetermined maximum value for each audio file (ie, as illustrated in FIG. 3). Suppose we have the same number of ranges equally). In this case, the storage unit 120 may store a predetermined number of ranges (ie, preference information) mapped to each audio file. Here, the preference information mapped corresponding to each audio file may be a certain number of range information. For example, the range of preference information for audio files

Assume that Then, each audio file may be assigned preference information as illustrated in FIG. 3.

) 내에서 재생 난수를 생성할 수 있다. 제어부(170)는 재생 난수가 포함되는 선호도 정보에 상응하여 매핑된 오디오 파일이 있는지 여부를 판단한다. 즉, 도 3 및 도 5와 같이 전체 선호도 값의 범위를 n개의 오디오 파일로 나누어 각각의 오디오 파일에 각각 동일한 범위의 영역으로 선호도 정보의 범위를 배정할 수 있다. 예를 들어, 도 3 및 도 5의 예시에서 오디오 파일이 10개라고 가정하자. 또한, 저장부(120)에 저장된 첫번째 오디오 파일을 제1 오디오 파일, 두번째 오디오 파일을 제2 오디오 파일,…, n번째 오디오 파일을 제n 오디오 파일이라 칭하기로 한다. 또한, 제1 오디오 파일에 상응하여 저장된 선호도 정보를 제1 선호도 정보, 제2 오디오 파일에 상응하여 저장된 선호도 정보를 제2 선호도 정보,…, 제n 오디오 파일에 상응하여 저장된 선호도 정보를 제n 선호도 정보라 칭하기로 한다.In this state, the control unit 170 is in a range of a predetermined maximum value (for example, 3

You can generate a replay random number within). The controller 170 determines whether there is an audio file mapped corresponding to the preference information including the play random number. That is, as shown in FIGS. 3 and 5, the range of the overall preference value may be divided into n audio files, and the range of the preference information may be allocated to each audio file in the same range. For example, assume that there are 10 audio files in the example of FIGS. 3 and 5. In addition, the first audio file stored in the storage unit 120 may include a first audio file, a second audio file, a second audio file,... The n th audio file is referred to as an n th audio file. In addition, the preference information stored in correspondence with the first audio file may include first preference information, the preference information stored in correspondence with the second audio file may include second preference information,. For example, preference information stored corresponding to the n-th audio file may be referred to as n-th preference information.

이므로, 제1 선호도 정보의 범위는 0 ~ 3276이되며, 제2 선호도 정보의 범위는 6553 ~ 9829가 되고, 제10 선호도 정보의 범위는 62258~65535가 되는 것을 알 수 있다. 이때 제어부(170)가 전체 선호도 값의 범위(예를 들어,

)에서 임의의 재생 난수를 생성하여 재생 난수가 임의의 선호도 정보의 범위에 포함되면, 제어부(170)는 해당 선호도 정보에 상응하여 매핑된 오디오 파일을 독출하여 복호화부(140)를 통해 복호화하여 음향 출력부(150)를 통해 출력한다. In this state, the range of total affinity values

Therefore, it can be seen that the range of the first preference information is 0 to 3276, the range of the second preference information is 6553 to 9829, and the range of the tenth preference information is 62258 to 65535. In this case, the controller 170 may determine a range of overall preference values (for example,

When the random number is generated and the random number is included in the range of the preference information, the controller 170 reads the mapped audio file corresponding to the corresponding preference information, decodes it through the decoder 140, and then sounds. Output through the output unit 150.

However, if the play random number is not included in the range of any preference information, the controller 170 generates a play random number again because there is no audio file to be mapped.

In the present specification, the multimedia data reproducing apparatus has been described focusing on reproducing audio data, but the same may be applied to multimedia contents.

As described above, an object of the present invention is to provide a multimedia data reproducing apparatus having a random selection function based on a selection history capable of increasing the reproduction probability of audio data having high preference by reflecting a preference according to a user's selection history. This has the effect of increasing the user's satisfaction.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (8)

In the multimedia data playback device having a random playback function, A storage unit which stores a plurality of multimedia data and preference information mapped to the multimedia data; An input unit configured to receive a selection command or a skip command for the multimedia data; A preference calculator configured to update the preference information mapped to the multimedia data according to the selection command or the skip command; A controller configured to generate a play random number within a range of a set value including the preference information and to read the multimedia data mapped to the play random number from the storage; A decoder which decodes the read multimedia data using a predetermined algorithm; And And a sound output unit configured to output the decoded multimedia data. According to claim 1, And the input unit includes one or more function buttons of play, pause, stop, mute, prev, and next. According to claim 1, And the preference information is arbitrary numeric information mapped to the multimedia data or an arbitrary number of ranges. The method of claim 1, And the preference calculator increases the preference information for the multimedia data when the selection command is input and decreases the preference information for the multimedia data when the skip command is input. The method of claim 4, wherein And the preference calculator is configured to update the preference information by using a probability value set to increase or decrease the preference information according to the selection command or the skip command. The method of claim 1, The controller is configured to regenerate the playback random number if there is no preference information mapped corresponding to the playback random number. In the arbitrary playback method of the multimedia data playback apparatus, Generating a reproduction random number within a range of a set value including preference information mapped to a plurality of multimedia data stored in a storage unit; Reading the multimedia data mapped to the reproduction random number from the storage unit; Decoding the read multimedia data according to a set algorithm; And Outputting the decoded multimedia data. The method of claim 7, wherein Receiving a selection command or a skip command of the multimedia data from a user; And And increasing the preference information when the selection command is input, and decreasing the preference information when the skip command is input.

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