# Patent

## Title
Playlist sharing methods and apparatus

## Abstract

A player device uses playlists having names of contents. Users can update the playlists via network. The player device includes a storage device for storing digital data of the contents, a reception/reception circuit for downloading playlists, a display for displaying the titles of contents included in the playlists, a pointing device for specifying displayed titles, a circuit for retrieving digital data from the storage device in the event that digital data of a content specified by the pointing device is stored within the storage device, and an output circuit for outputting the retrieved digital data.

## Background
CROSS REFERENCES TO RELATED APPLICATIONS
The present invention claims the benefit of 35 U.S.C. §120 as a continuation of U.S. Ser. No. 13/303,588, filed Nov. 23, 2011 and entitled “PLAYLIST SHARING METHODS AND APPARATUS,” which is a continuation of U.S. Ser. No. 11/385,084, filed Mar. 21, 2006 and entitled “INTERACTIVE PLAYLIST MEDIA DEVICE,” now U.S. Pat. No. 8,107,327, which claims the priority benefit of Japanese patent application number 2005-085349, filed in the Japanese Patent Office on Mar. 24, 2005, all of which applications are hereby incorporated by reference to the maximum extent allowable by law.


BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a player device for tune data and the like.
2. Description of the Related Art
Tune player equipment having large-capacity storage devices, such as hard disk devices or non-volatile memory, are becoming mainstream. Such player equipment is capable of holding thousands or tens of thousands of tunes.
For example, a hard disk device with 100 GB capacity is capable of saving 3400 tunes or more if we say that the duration of each tune is three minutes. Further, MP3 encoding of the digital audio data compresses the data size down to 1/10 to 1/12 of the original data size, meaning that 40,000 tunes or more can be stored.
Accordingly, such tune player devices allows the user to always have tunes close at hand and even carried around, which can be listened to at will.
However, having so many tunes available in a single player device may cause difficulty for the user to find tunes matching his/her mood or preferences at that particular time.
One method that has been conceived to address this issue is sharing what is known as a playlist. A playlist is a list of tune titles which a user has selected according to his/her own preferences. For example, a user might collect the titles of tunes he/she likes to listen to during beachside drives, and make a list of these to create a “beachside drive” playlist.
Enabling this playlist to be exchanged and viewed among friends and the like can provide individuals with ideas on tunes to select. Accordingly, this method facilitates selection of tunes.
Another method is to form a community of individuals having like preferences and to exchange information. According to this method, members of this community can enjoy the benefits of the broad range of preferences expressed by other members.
Such methods are described in, for example, Japanese Unexamined Patent Application Publication No. 2004-13653 and Japanese Unexamined Patent Application Publication No. 2004 46575.
SUMMARY OF THE INVENTION
However, such playlist sharing methods merely enable playlists to be exchanged and browsed, meaning that one person is simply subjectively expressing his/her preferences and interests to others, without taking into consideration the preferences and situation of the individual to which the playlist has been introduced. This can lead to the following problems, for example.

    
    
        Tunes introduced in the playlist often do not meet the preferences of the recipient.
        The recipient cannot listen to the tunes unless recorded in the recipients own player equipment.
        Any opinions regarding the contents of the playlist are made through other communication means such as e-mail, telephone calls, etc, so opinions cannot be readily exchanged. Further, such information cannot be shared among a great number of users.
        The recipient cannot tell how widely the playlist received from another person is supported.
    
    


Moreover, the method of forming a community has the problem in that the exchanged information may not directly lead to a tune which an individual wants to listen to.
The present invention has been made in light of the above issues, and provides for facilitating selection of tunes matching the preferences of users, providing situations wherein users can exchange information regarding recommended tunes, and even enjoying communication one with another.
According a player device according to one embodiment of the present invention uses playlists having names of contents such that users can update the playlists via a network, and includes a storage device for storing digital data of the contents, a reception/reception circuit for downloading the playlists, a display for displaying the titles of contents included in the playlists, a pointing device for specifying one of the displayed titles, a circuit for retrieving digital data from the storage device in the event that digital data of a content specified by the pointing device is stored within the storage device, and an output circuit for outputting the retrieved digital data.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a frontal view illustrating the external view of an embodiment of the present invention;
FIG. 2 is a systematic drawing illustrating the embodiment;
FIG. 3 illustrates an arrangement of display content according to the embodiment; and
FIG. 4 is a diagram for describing the items displayed in the embodiment.



DESCRIPTION OF THE PREFERRED EMBODIMENTS
(1) Example of Overview of Player Device
FIG. 1 illustrates an example of the external view a player device 10 in one embodiment of the present invention. In this example, the player device 10 has been configured as a portable device.
It should be noted that in this Specification, the terms “tunes” and “music” cover a broad range of audio-expressed information including and beyond the general understanding of tunes and music, such as recital of poetry, literature, etc., performance of comedians and comic story-tellers, speeches, news, sport event coverage, and so forth.
The player device 10 has an overall rectangular flat form, and has on the lower portion thereof operating keys 12, mode keys 13, and typing keys 14. A display 11 is of a color LCD (liquid crystal display) panel for example, for color display of various types of text (including numbers and symbols; hereafter the phrase “text” should be interpreted according to this definition) by combining dots. As described later, at the time of selecting tunes, this display 11 displays playlists or the like, and at the time of playback of tunes, displays information relating to the tune.
Also, the operating keys 12 serve as a pointing device, and include cursor keys 12A for enabling moving of a cursor 11D vertically and horizontally on the display 11 whenever the cursor 11D is displayed thereupon, and an enter key 12B for selecting or instructing executing of an item indicated by the position of the cursor. Further, the mode keys 13 are for controlling playing, stopping, etc, of music. Further, typing keys 14 are for inputting text such as comments and the like.
Further provided to the upper portion of the player device 10 is an extensible antenna 15 and a headphone jack 16. The antenna 15 is for realizing wireless access to data on an external server, with a headphone 17 connectable to the jack 16.
Other arrangements encompassed by the present invention include using a pressable jog dial replacing the configuration of at least part of the keys 12A and the key 12B, and using a built-in antenna for the antenna 15.
(2) Example of Circuit Configuration of Player Device and Example of Operation
FIG. 2 illustrates an example of the circuit configuration of the player device 10. In this example, the player device 10 has built in a large-capacity storage device, so as to enable listening of the tunes stored therein, and also has functions of communication with an external server, so that tunes not stored in the built-in large-capacity storage device can be listened to as well.
In this example, the player device 10 has a general bus architecture, and also has a control circuit 20 configured of a microcomputer. More specifically, a CPU 21 is connected to a bus 29, and connected to this bus 29 are: a ROM 22, in which various types of programs are written; a RAM 23, serving as a work area; and a non-volatile memory 24, configured of, for example a flash memory.
Also, a hard disk device 26 is provided in this example as the large-capacity storage device for storing tune data, which is connected to the bus 29 via a hard disk controller 25. The tune data is saved in the hard disk device 26 in the from of audio data, and with the present embodiment, the tunes have been encoded and compressed with the MP3 format, for example. The hard disk controller 25 writes the digital audio data to the hard disk device 26 according to commands from the CPU 21.
Further provided is a transmission/reception circuit 28, connected to an interface circuit 27 via the bus 29. The transmission/reception circuit 28 wirelessly connects the player device 10 to an external server (or an access point thereof), to realize downloading of digital audio data of tunes, receiving streamed audio data of tunes, downloading of playlists, accessing electronic bulletins, and so forth. The antenna 15 is connected to the transmission/reception circuit 28. Note that the digital audio data of tunes provided on the server has been encoded and compressed by the MP3 format, for example.
Further, the display 11 is connected to the bus 29 via a display controller, and also the keys 12 through 14 are connected to the bus 29 via an interface circuit 32. The display controller 31 is for converting display data supplied from the CPU 21 into display signals and supplying the display signals to the display 11, whereby the display 11 can display text corresponding to the display data supplied from the CPU 21.
Also, a decoder circuit 33 is connected to the bus 29, and the decoder circuit 33 is connected to the jack 16 via an output circuit 34. The decoder circuit 33 is for receiving supply of MP3 format digital audio data, decoding the digital audio data into linear digital audio data, and supplying to the output circuit 34. Also, the output circuit 34 has a D/A converter and an output amplifier, so that digital audio data supplied to this output circuit 34 is subjected to D/A conversion into analog data and output to the jack 16.
With such a configuration, in the event of specifying playback of a tune stored in the hard disk device 26 as described later in (4), a specified tune is read out from the hard disk drive 26 by the hard disk controller 25. The digital audio data which has been read out is supplied from the hard disk controller 25 to the decoder circuit 33 via the CPU 21 and is decoded into the original linear audio data.
The decoded digital audio data is subjected to D/A conversion into analog audio signals at the output circuit 34, and is supplied to the headphones 17 through the jack 16. Accordingly, the tunes stored on the hard disk device 26 can be listened to with the headphones 17.
Also, in the event of instructing listening to a tune provided on an external server (including listening to samples) as described in (4), the digital audio data of the tune is read out from the server, and is wirelessly streamed.
The transmitted signals are received by the antenna 15 and supplied to the transmission/reception circuit 28, with the digital audio data of the specified tune being output from the transmission/reception circuit 28 and supplied to the decoder circuit 33 via the interface circuit 25 and CPU 21, so as to be decoded into the original linear digital audio data.
Accordingly, the decoded digital audio data is subjected to D/A conversion into analog audio signals at the output circuit 34 and is supplied to the headphones 17 through the jack 16, and accordingly can be listened to with the headphones 17.
Also, in the event that the user is permitted to download a tune provided on the server, the digital audio data of the tune is downloaded and saved in the hard disk device 26. Accordingly, the tune can thereafter be reproduced from the hard disk device 26 and be listened to.
(3) Display Example of Display 11
FIG. 3 illustrates an example of a display screen in the display 11 at the time of selecting a tune. The details of how the user operates this display screen will be described later in detail. The display screen shown in FIG. 3 is divided into a sub-screen 11A on the left half of the display 11, a sub-screen 11B on the upper half of the right side, and a sub-screen 11C on the lower half of the right side.
Accessing the server with the player device 10 downloads predetermined data from the server, and a “scene tree” is displayed on the sub-screen 11A. The idea behind this is that there are various situations states, and objects, in the conditions which dictate what sort of tune the user is going to want to listen to, and this is what is referred to as “scene”. The scene tree is a visualized hierarchical arrangement of playlists provided in the server, displayed on the display 11 of the player device 10 in accordance with the data transmitted from the server. Accordingly, in the scene tree, the farther the hierarchical levels branch from the root, the more narrowly the hierarchical levels are classified. The playlists are shown at the lowest level.
FIG. 3 illustrates a state wherein a server A has been accessed and playlists provided at this server A is displayed in a scene tree format. The scenes are classified in a tree-like manner, and the playlists at the lowest level are displayed according to the name (including pen names, handles, etc.) of the compiler of the playlist. FIG. 3 illustrates a case of selecting, from the root toward the lowest layer, in the order of server A→drive recommendations→summer vacation drive→recommendations by dj.
This selection is made by executing an operation for pressing the cursor keys 12A (or turning the jog dial in the case of an arrangement using a jog dial) to move the cursor 11D through each hierarchical level and pressing the enter key 12B at a desired scene in that hierarchical level. Also, the playlists displayed at the lowest level are displayed in order of ranking. That is to say, as described later, the contents of the playlists are evaluated by a great number of other users, ranked in the server based on the results thereof, and displayed at the lowest level in order of ranking.
Upon placing the cursor 11D on the intended playlist and pressing the enter key 12B, the playlist where the cursor is situated is downloaded, and the contents of the “current playlist” are displayed on the sub-screen 11B. The playlist displayed as the “current playlist” is created by a certain user becoming the initiating compiler. Also, the initiating compiler has compiled the playlist using the player device 10 or a personal computer and uploaded it to the server.
Further, the titles (and performers) of the tunes contained in the playlist downloaded from the server are displayed as a list on the sub-screen 11B, as the contents of the playlist. At the time of displaying the playlist on the player device 10 of a user, the player device 10 distinguishes between tunes which are stored in the player device 10 and tunes which are not, and differentiates in the way the tunes are displayed in the list.
The situation shown in FIG. 3 is that wherein the playlist “recommendations by dj” originally compiled by “dj” has been selected, and the titles (and performers) of the tunes contained in this playlist are displayed. Buttons 11E and 11F labeled “listen to sample” and “purchase” are displayed to the left of the tune “Summertime Memories”. These buttons are displayed due to corresponding tune data not being stored in the player device 10, meaning that the tune data corresponding to the two first tunes is stored in the player device 10, since these buttons 11E and 11F are not displayed.
The sub-screen 11B further displays a rating space 11G. This rating space 11G indicates evaluations made by general users regarding the playlist in the from of symbols and numbers.
Also, when the current playlist is downloaded from the server and displayed in the sub-screen 11B, the sub-screen 11C displays “comments on current playlist”. These commands are downloaded from the server at the same time as the data in the sub-screen 11B and displayed in the sub-screen 11B, to convey commends on the tunes in the playlist selected in the sub-screen 11A.
More specifically, the commands are an arrangement of information posted on an electronic bulletin, meaning that a dedicated bulletin is run for this playlist. General users can post comments and ideas regarding the tunes and performers included in the playlists disclosed to the bulletin. The postings are added to those already posted. The commends posted are downloaded to the player device 10 and displayed in the sub-screen 11C as comments.
The sub-screen 11C shown in FIG. 3 displays a state wherein the playlist “recommendations by dj” has been selected from the scene tree and comments regarding the tunes and performers in the playlist have been displayed. Each of the comments are those that have been posted on the bulletin.
The sub-screen 11C further has displayed therein a “rate playlist” button 11J and “submit comment” button 11K. The “rate playlist” button 11J is for general users to operate when rating, and the results of the rating are reflected in the rating space 11G. Also, the submit comment button 11K us for general users to operate when adding a comment. Operating this button 11K enables writing comments to be posted on the bulletin.
(4) Example of Operations on the Display Screen
(4-1) Playing Tunes
The user moves the cursor 11D to one of the tunes displayed in the sub-screen 11B regarding which the buttons 11E and 11F are not displayed, and presses the enter key 12B. The tune data with that title is stored in the hard disk drive 26 in this case, so reading the digital audio data out from the hard disk device 26 and playing of the tune is executed as described above, and accordingly can be listened to though the headphones 17.
A tune thus selected from the hard disk drive can be played in the same was as with normal playback, with pausing a fast-forward operations using the mode keys 13 being enabled. Also, at this time, the tunes of the current playlist displayed on the sub-screen 11B that are stored in the hard disk device 26 can be selected or skipped using the mode keys 13.
Further, let us say that the user moves the cursor 11D to one of the tunes displayed in the sub-screen 11B regarding which the buttons 11E and 11F are displayed, the tune “Summertime Memories” in this case, and presses the enter key 12B. The tune of this title is not stored in the player device 10, so a request is transmitted to the server for distribution of digital audio data of the tune, and consequently, digital data corresponding to the tune “Summertime Memories” is streamed from the server, and the user can listen to the tune through the headphones. In this case, listening to a sample means an arrangement wherein the user is permitted to listen to a part of the tune, such as the first 30 seconds, or highlights of the tune, for example. Accordingly, the user can determine whether or not to purchase the tune.
In the event that user decides to purchase the tune, the user moves the cursor 11D to the purchase button 11F and presses the enter key 12B. Digital data of the tune with that title is downloaded from the server and stored on the hard disk device 26. User verification and payment procedures and the like necessary for purchasing the tune may be generally-implemented methods.
Accordingly, the next time the user selects the same playlist so as to be displayed in the state shown in FIG. 3, the listen to sample bulletin 11E and purchase button 11F are no longer displayed. Further, thereafter, selecting playback of the tune “Summertime Memories” plays the tune back from the hard disk device 26.
(4-2) Operations Regarding the Content of the Playlist
Upon the user operating the rate playlist button 11J from the sub-screen 11C in the state shown in FIG. 3, the results thereof are uploaded to the server and the rating of the playlist is updated in the server. The server calculates and discloses the points. Accordingly, the updated results of the server are returned to the player device 10, and the display of the rating space 11G is updated.
Also, pressing the submit comment button 11K brings up an unshown comment input space on the display 11 so that the user can input text using the typing keys 14. Also, the player device 10 is connected to a server running the electronic bulletin. The user inputs comments regarding a tune or performer in the playlist displayed before the comment input space was displayed, and finally operates a “send” button (post button), whereby the input comment is transmitted to the server and added to the playlist.
Once the playlist to which the comment has been added is returned to the player device 10, and display screen reverts to that shown in FIG. 3, but with the comment newly made being displayed in the updated sub-screen 11C.
Such an arrangement enables users to easily exchange live information with each other by adding comments. Also, the player device 10 and the server remain in a communicating state, meaning that the displayed playlist is always updated to the newest content.
(5) Example of Playlist
FIG. 4 illustrates an example of the contents of a playlist. The playlist is in XML (extensible Markup Language) format in actual practice, but is shown in a text table format here in FIG. 4 to facilitate description.
In FIG. 4, “URL” refers to the URL here the playlist is stored, and “Title” is the name given to this playlist, which is displayed at the lowest level in the scene tree in sub-screen 11A and is also the title used in sub-screens 11B and 11C. “Rating” and “rating points” are data shown in the rating space 11G in the sub-screen 11B, and “number of tunes” is to total number of tunes included in this playlist, which is equal to the number of tunes displayed in the sub-screen 11B.
Further, “tune i title” and “tune i artist” (i=1 through 3 in the case in FIG. 3) show the titles and performs of the tunes in the playlist, these being displayed in the sub-screen 11B in the from of a list. Also, “comment j” (j=1 through 3 in the case in FIG. 3) are comments displayed in the sub-screen 11C. When someone writes a comment to the playlist via the bulletin, the comments are added as Comment 4, Comment 5, Comment 6, and so on.
(6) Advantages of the Embodiment
With the player device 10 configured as described above, multiple situations for listening to tunes are provided in light of music listening styles of users, and playlists can be exchanged for each situation, so the probability that a user will be recommended a tune closer matching his/her preferences is increased.
Also, in the event that the player device 10 of the user does not have a recommended tune stored therein, the user can listen to a sample of the tune or purchase the tune. Comments regarding the playlist are disclosed, serving as further information for the user to select playlists. Also, comments regarding the playlist can be exchanged by way of electronic bulletin, thereby forming a community where live information is constantly circulated among individuals in a more human manner, so users are constantly in a situation where fresh tune recommendations are available.
Further, the playlists are ranked by participants, so there is a greater change of a user being recommended a tune which is closer to own preferences, as the rating is clearly indicated in points. Moreover, newest playlist information can be easily obtained.
Also, providing the playlists with themes facilitates exchange of tune information closer to the atmosphere of that theme. Further, points rating the playlist are automatically calculated by operating the player device 10 and the information thereof is automatically uploaded to the server, thereby automatically forming a popularity ranking of the playlist on the server. Moreover, users can learn new ways of enjoying and listening to music due to the above features.
(7) Modifications
In the event that the player device 10 of the user can access multiple servers A, B, C, and so forth, an arrangement may be made wherein the servers A, B, C, and so forth are displayed in the tree root, and upon the user selecting a target server, the playlists provided on that server are displayed as a scene tree.
The playlist data format may be text or binary, as long as the data is in an extensible format such as XML. Also, the above embodiment has been described with the locations where playlists are stored being indicated by URLs, but identifiers other than URLs may be used, as long as the storage destination can be uniquely defined on the network.
Also, the above embodiment has been described with the user explicitly rating the playlist displayed in the sub-screen 11B by operating the rate playlist button 11J, but arrangements may be made wherein the rating is lowered within the player device 10 whenever the user skips a tune, or raised when the user repeats a tune. Also, an arrangement wherein the rating points are automatically calculated in the player device 10 and uploaded to the server enables only popular tunes to be ranked high.
It should be further noted that while the above-described content is audio content such as tunes, the present invention can be applied in the same way to cases wherein the content is visual content, such as moving images, still images, and so forth.
It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.

## Claims

1. A server for sharing a playlist, the server comprising:
a communication unit configured to:
receive first information about a playlist uploaded from a first player device;
receive a request from a second player device to download the first information about the playlist from the server to the second player device;
send the first information about the playlist to the second player device in response to the request; and
receive second information about the playlist from the second player device; and

a controller configured to associate the second information with the uploaded first information about the playlist, wherein the first information about the playlist includes titles of contents in the playlist, and wherein the second information comprises an evaluation and/or a comment.

2. The server of claim 1, wherein the communication unit is further configured to: receive a request from the second player device to play content corresponding to a title in the playlist.

3. The server of claim 2, wherein content corresponding to the title is sent to the second player device in response to receiving the request to play the content.

4. The server of claim 3, wherein the content is sent to the second player device by streaming the content to the second player device.

5. The server of claim 1, wherein the communication unit is further configured to receive the second information from the first player device in addition to the second player device.

6. The server of claim 1, wherein the communication unit is further configured to:
send, to the second player device, third information of a number of contents included in the playlist.

7. The server of claim 1, wherein the controller is further configured to:
calculate a total evaluation of the playlist or number of comments on the playlist.

8. The server of claim 4, wherein the content is a sample of the content, wherein the sample is a portion of content associated with the corresponding title.

9. The server of claim 1, wherein the communication unit is further configured to receive a request from the second player device to purchase full content associated with the content.

10. A method of sharing a playlist, the method comprising:
receiving first information about a playlist uploaded from a first player device;
receiving a request from a second player device to download the first information about the playlist from the server to the second player device;
sending the first information about the playlist to the second player device in response to the request;
receiving second information about the playlist from the second player device; and
associating the second information with the uploaded first information about the playlist,

wherein the first information about the playlist includes titles of contents in the playlist, and wherein the second information comprises an evaluation and/or a comment.

11. The method of claim 10, further comprising:
receiving a request from the second player device to play content corresponding to a title in the playlist.

12. The method of claim 11, wherein content corresponding to the title is sent to the second player device in response to receiving the request to play the content.

13. The method of claim 12, wherein the content is sent to the second player device by streaming the content to the second player device.

14. The method of claim 10, further comprising:
receiving the second information from the first player device in addition to the second player device.

15. The method of claim 10, further comprising:
sending, to the second player device, third information of a number of contents included in the playlist.

16. The method of claim 10, further comprising:
calculating a total evaluation of the playlist or number of comments on the playlist.

17. The method of claim 13, wherein the content is a sample of the content, wherein the sample is a portion of content associated with the corresponding title.

18. The method of claim 10, further comprising:
receiving a request from the second player device to purchase full content associated with the content.

19. A player device for sharing a playlist, the player device comprising:
a communication unit configured to:
send a request to a server to download first information about the playlist stored on the server, wherein the first information includes titles of contents in the playlist;
receive the first information about the playlist from the server in response to the request; and
send second information about the playlist to the server, wherein the second information comprises an evaluation and/or a comment.

20. The player device of claim 19, wherein the communication unit is further configured to: send a request to the server to play content corresponding to a title in the playlist.

21. The player device of claim 20, wherein content corresponding to the title is received by the player device in response to sending the request to play the content.

22. The player device of claim 21, wherein the content is received by the player device by streaming the content to the player device.

23. The player device of claim 19, wherein the communication unit is further configured to:
receive from the server, third information of a number of contents included in the playlist.

24. The player device of claim 21, wherein the content is a sample of the content, wherein the sample is a portion of content associated with the corresponding title.

25. The player device of claim 19, wherein the communication unit is further configured to send a request to the server to purchase full content associated with the content.

26. A storage device encoded with a plurality of instructions that, when executed by a controller of a player device, perform a method of sharing a playlist, the method comprising:
sending a request to a server to download first information about the playlist stored on the server, wherein the first information includes titles of contents in the playlist;
receiving the first information about the playlist from the server in response to the request; and
sending second information about the playlist to the server, wherein the second information comprises an evaluation and/or a comment.

27. The storage device of claim 26, wherein the method further comprises sending a request to the server to play content corresponding to a title in the playlist.

28. The storage device of claim 27, wherein content corresponding to the title is received by the player device in response to sending the request to play the content.

29. The storage device of claim 28, wherein the content is received by the player device by streaming the content to the player device.

30. The storage device of claim 26, wherein the method further comprises receiving from the server, third information of a number of contents included in the playlist.

31. The storage device of claim 28, wherein the content is a sample of the content, wherein the sample is a portion of content associated with the corresponding title.

32. The storage device of claim 26, wherein the method further comprises sending a request to the server to purchase full content associated with the content.

33. A method of sharing a playlist, the method comprising:
sending a request to a server to download first information about the playlist stored on the server, wherein the first information includes titles of contents in the playlist;
receiving the first information about the playlist from the server in response to the request; and
sending second information about the playlist to the server, wherein the second information comprises an evaluation and/or a comment.