JP2011233024A - List transfer device, list transfer program and list display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a list transfer device capable of performing renewal of a list displayed on a display device.SOLUTION: A list transfer device 3 renews a transmission list in accordance with an update instruction of a display list from a display device 2 and transmits to the display device 2. The list transfer device 3 creates change data showing whether or not metadata of the renewed transmission list is changed from metadata of the transmission list before renewal. If a new update instruction is received before transmission of the transmission list is completed, the list transfer device 3 suspends the transmission of the transmission list and transmits the change data to the display device 2. The list transfer device 3 transmits basic data including metadata designated by a cursor in the transmission list which is renewed in accordance with the new update instruction and the change data. The display device renews the display list in accordance with the change data and the basic data.

Description

  The present invention relates to a list transfer device, a list transfer program, and a list display device. More specifically, the present invention relates to a list transfer device, a list transfer program, a display device, and a list transfer device that transmit a list of metadata displayed by the display device. The present invention relates to a list display device provided.

  A network AV system using a home LAN is disclosed in Japanese Patent Laid-Open No. 2005-182762 (Patent Document 1). The network AV system disclosed in this document includes a server that stores a plurality of contents, and a playback device that acquires and plays back the contents from the server.

  Such a network AV system server stores a large number of contents. The playback device displays a list listing content titles on the display. The user selects desired content from the list displayed on the display, and instructs playback.

JP 2005-182762 A JP 2008-129954 A

  The number of titles that can be listed in the list displayed on the display of the playback device is limited. For example, when the server accumulates 2000 song data, and the number of titles that can be listed in the list displayed on the display of the playback device is 10, the user must find a desired title before finding the desired title. The list must be updated multiple times. For example, the user selects a “next page” button among the operation keys of the playback device. At this time, the playback apparatus updates the currently displayed list, and displays a list listing the titles of the next 10 songs on the display. When the “next page” button is further selected, a list listing the titles of the next 10 songs is displayed.

  As described above, when the list update is continuously requested, it may take time until the updated list is displayed. That is, when the user requests list update several times in succession, it may take time until the list is updated to the list requested by the user.

  An object of the present invention is to provide a list transfer device that can quickly update a list displayed on a display device.

Means for Solving the Problems and Effects of the Invention

  The list transfer device according to the present invention can be connected to a display device that displays a display list in which metadata of a plurality of content data is listed. The list transfer apparatus includes a transmission list update unit, a change data generation unit, a normal transmission unit, a pre-transmission unit, and a high-speed transmission unit. The transmission list update means includes a plurality of metadata and data related to the designated position in the display list, and updates the transmission list used by the display device to update the display list in response to a display list update instruction. The change data generation means generates change data indicating whether or not the metadata of the updated transmission list has been changed from the metadata of the transmission list before the update. The normal transmission unit transmits the updated transmission list to the display device. The prior transmission means stops transmission of the transmission list and transmits the changed data to the display device when a new update instruction is received before transmission of the transmission list is completed. The high-speed transmission means transmits the first basic data to the display device after the transmission of the change data is completed. The first basic data includes metadata corresponding to the specified position in the transmission list updated according to the new update instruction, and change data created according to the new update instruction, and is displayed by the display device. Used to update the list.

  The list transfer device according to the present invention updates the transmission list in response to the list update instruction, and transmits the updated transmission list to the display device. With the above operation, a display list corresponding to the list update instruction is displayed on the display device.

  Further, when a new list update instruction is received while the transmission list is being transmitted, the display list is updated by transmitting change data regarding the transmission list being transmitted, and then the first basic data is transmitted. Update the display list further. At this time, the data amount of the change data is smaller than that of the transmission list, and the data amount of the first basic data is also smaller than that of the transmission list. When the list update instruction is transmitted a plurality of times, the list transfer device reduces the amount of transmission data by transmitting the change data and the first basic data. As a result, the list is updated quickly. Furthermore, since a part of the updated metadata is displayed by the first basic data, the user can confirm that the display list has been updated.

Preferably, the prior transmission means further stops the transmission of the first basic data and transmits the changed data to the display device when a new update instruction is received before the transmission of the first basic data is completed.
In this case, the display list can be quickly updated even when an instruction to update the display list is selected a plurality of times in succession.

  Preferably, the advance transmission means further transmits second basic data including metadata designated by the cursor in the transmission list and the change data.

  In this case, the display list updated based on the second basic data is displayed on the display device until the first basic data is received by the display device.

  Preferably, the list transfer device further includes change data storage means. The change data storage means stores the change data transmitted by the prior change means. The transmission list update means updates the transmission list after the change data storage means stores the change data.

  In this case, the change data is generated accurately.

  Preferably, the display list update unit deletes the metadata in the display list and updates the metadata when the updated transmission list metadata is changed from the metadata of the transmission list before the update based on the change data. If the metadata of the transmitted transmission list is not changed from the metadata of the transmission list before the update, the display of the metadata in the display list is maintained.

  In this case, when an instruction to update the entire display list is received, the metadata in the display list is deleted, and the metadata in the first basic data is displayed in the display list. Therefore, the user can easily recognize that the display list has been updated.

  Preferably, the normal transmission unit transmits the transmission list updated in response to a new update instruction after the first basic data is transmitted by the high-speed transmission unit.

  In this case, the transmission list updated by the last list update instruction among the multiple list update instructions is reflected in the display list.

  A list display device according to the present invention includes the above-described list transfer device and a display device. The display device updates the display list according to the data transmitted from the list transfer device. The list transfer program according to the present invention is executed by a computer in the list transfer apparatus described above.

It is a functional block diagram which shows the structure of the list display apparatus by embodiment of this invention. It is a functional block diagram which shows the internal structure of the display apparatus, list transfer apparatus, and server which were shown in FIG. It is a schematic diagram which shows an example of the display list displayed on the display apparatus in FIG. It is a schematic diagram which shows another example of the display list different from FIG. FIG. 5 is a schematic diagram illustrating another example of a display list that is different from FIGS. 3 and 4. It is a figure which shows an example of the data structure of the newest list stored in the list transfer apparatus in FIG. It is a figure which shows an example of the data structure of the transmission list stored in the list transfer apparatus in FIG. It is a figure which shows another example of the data structure of the newest list different from FIG. It is a figure which shows another example of the data structure of the transmission list different from FIG. It is a figure which shows an example of the data structure of the basic data stored in the list transfer apparatus in FIG. It is a schematic diagram which shows another example of a display list different from FIGS. FIG. 10 is a schematic diagram illustrating another example of a transmission list that is different from FIGS. 7 and 9. It is a schematic diagram which shows another example of the display list different from FIGS. 3-5 and FIG. It is a schematic diagram which shows the other example of a display list different from FIGS. 3-5, FIG. 11, and FIG. FIG. 15 is a schematic diagram illustrating another example of a display list that is different from FIGS. 3 to 5, 11, 13, and 14. It is a flowchart which shows the detail of the list production | generation process of the list transfer apparatus in FIG. It is a flowchart which shows the detail of the list transmission process of the list transfer apparatus in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Overall Configuration of List Display Device 1]
FIG. 1 is a functional block diagram showing the overall configuration of the list display device 1. Referring to FIG. 1, the list display device 1 includes a display device 2 and a list transfer device 3. The display device 2 is, for example, a terminal. The terminal is, for example, a controller or a remote control device. The list transfer device 3 is, for example, an AV device. The AV device is, for example, a receiver, a CD player, a DVD player, a digital audio player, or the like. The display device 2 and the list transfer device 3 are connected by a cable 4. The cable 4 is, for example, an RS-232 cable.

  The list display device 1 is connected to the server 5 via the network 6. The network 6 is, for example, the Internet or a LAN (Local Area Network). The server 5 stores a plurality of content data. The content data is, for example, music data, video data, image data, audio data, and the like. In this example, content data is described as music data.

  The server 5 further accumulates metadata corresponding to each content data. The metadata includes, for example, information on the content title, content author, content playback time, and the like. In this example, the metadata is described as a song title. For example, the server 5 sorts and stores the song titles according to a predetermined rule (for example, alphabetical order or aiueo order).

  The server 5 transmits a plurality of metadata based on the request from the list display device 1. The list transfer device 3 in the list display device 1 receives a plurality of metadata and generates a list (transmission list) listing the metadata. Then, the list transfer device 3 transmits the transmission list to the display device 2. The display device 2 receives the transmission list and displays the display list on the display 105 (see FIG. 2). With the above operation, the user of the list display device 1 can browse the display list listing the song titles of the song data stored in the server 5.

  The user selects a desired song title from the display list and instructs playback. The display device 2 requests the list transfer device 3 to reproduce the selected song title. The list transfer device 3 requests and acquires the song data of the selected song title from the server 5. Then, the list transfer device 3 reproduces the acquired song data.

[Configuration of each device]
FIG. 2 is a functional block diagram illustrating the internal configuration of the display device 2, the list transfer device 3, and the server 5. Hereinafter, the internal configuration of the display device 2 will be described.

  Referring to FIG. 2, the display device 2 includes a central processing unit (CPU) 101, a memory 102, a hard disk drive (HDD) 103, a communication unit 104, a display 105, and an input unit 106. The HDD 103 stores a list display program. When the list display program is loaded into the memory 102 and executed by the CPU 101, the display device 2 executes an operation described later. The communication unit 104 transmits / receives data to / from another device (list transfer device 3). The input unit 106 is, for example, a remote control device in which a keyboard, a mouse, and a plurality of operation keys are arranged.

  Similar to the display device 2, the list transfer device 3 includes a CPU 101, a memory 102, an HDD 103, a communication unit 104, a display 105, and an input unit 106. The HDD 103 of the list transfer device 3 stores a list transfer program. When the list transfer program is loaded into the memory 102 and executed by the CPU 101, the list transfer apparatus 3 performs the operation described later. The communication unit 104 transmits and receives data to and from the display device 2 and the server 5.

  Similarly to the display device 2 and the list transfer device 3, the server 5 includes a CPU 101, a memory 102, an HDD 103, a communication unit 104, a display 105, and an input unit 106. The HDD 103 of the server 5 stores a plurality of song data and a plurality of song titles corresponding to the song data. The communication unit 104 transmits / receives data to / from the list transfer device 3.

  Note that the list transfer device 3 and the server 5 may not include the display 105 and the input unit 106.

[Outline of operation of list display device 1]
[Display list]
The display device 2 displays a display list listing the song titles of the song data stored in the server 5 on the display 105. FIG. 3 shows an example of a display screen of the display 105 on which the display list is displayed. Referring to FIG. 3, a display list is displayed on display 105 of display device 2. A plurality of song titles are listed in the display list. Specifically, ten music titles ITEM1 to ITEM10 are arranged from the top (top) to the bottom (bottom) of the display list. The display device 2 further displays a cursor 20. The cursor 20 designates a song title arranged at a position designated by the user or the like. In FIG. 3, the cursor 20 designates the song title ITEM5. In other words, the cursor 20 is placed on the song title ITEM5. In this example, it is assumed that the server 5 stores 2000 song data. Therefore, the server 5 stores the song titles ITEM1 to ITEM2000.

  In this example, the input unit 106 of the display device 2 further includes a plurality of operation keys. The plurality of operation keys include a “cursor UP” button, a “cursor DOWN” button, a “next page” button, and a “previous page” button. When the “cursor DOWN” button is selected once by a user operation, the display device 2 moves the cursor 20 down one line. Specifically, the display device 2 moves the cursor 20 placed on “ITEM5” in FIG. 3 onto “ITEM6” as shown in FIG. When the “cursor UP” button is selected once by a user operation, the display device 2 moves the cursor 20 up one line. Specifically, the display device 2 moves the cursor 20 arranged on “ITEM5” onto “ITEM4”.

  When the “next page” button or the “previous page” button is selected once by a user operation, the list display device 1 updates the display list displayed on the display device 2. Specifically, when the “next page” button is selected once while the display list shown in FIG. 3 is displayed on the display 105, the display list is updated as shown in FIG. That is, the list display device 1 identifies the song titles ITEM1 to ITEM10 of the display list that was displayed immediately before the “next page” button was selected. Next, ten song titles ITEM11 to ITEM20 arranged next to ITEM1 to ITEM10 are acquired in the HDD 103 of the server 5, and the display list is updated to a display list including ITEM11 to ITEM20. At this time, the position of the cursor 20 is the same position as in FIG. 3 (that is, the fifth line).

  When the “previous page button” is selected once when the display list of FIG. 3 is displayed, the display list displayed by the display device 2 is listed before ITEM1 to ITEM10 in the HDD 103 of the server 5. The display list is updated to include 10 music titles (ITEM 1991-ITEM 2000).

[Normal transmission of song list, advance transmission and high-speed transmission]
As described above, the input unit 106 of the display device 2 can select four list update instructions (cursor UP, cursor DOWN, next page, and previous page). The user selects a list update instruction via the input unit 106 of the display device 2. The display device 2 transmits the selected list update instruction to the list transfer device 3 in response to a user operation.

  The list transfer device 3 updates the display list according to the transmitted list update instruction. In order to update the display list, the list transfer device 3 executes the following three transmission processes.

[Normal transmission processing]
When receiving the list update instruction, the list transfer device 3 executes normal transmission processing. Hereinafter, the normal transmission process will be described in detail.

  The list transfer device 3 includes a latest buffer and a normal buffer in the memory 102. The latest buffer stores the latest list generated in response to a list update instruction from the display device 2. The latest list is a list of song titles to be displayed on the display device.

  FIG. 6 shows the data structure of the latest list. Referring to FIG. 6, the latest list includes line number data, cursor position data that is data related to a designated position in the display list, and ITEM data. The position data is data related to the position arranged in the display list, and in this example, is the row number (1 to 10). In this example, since the song titles included in the display list are 10 songs, the line numbers are 1 to 10. The line number is changed according to the number of song titles included in the display list. The ITEM data is a song title ITEMn (n is a natural number, 1 ≦ n ≦ 2000) displayed in each row of the song list. The cursor position data is data relating to the designated position among the positions where the metadata is arranged in the display list. In this example, the cursor position data is data relating to the line number where the cursor is arranged. When the cursor position data is “0”, it indicates that the cursor is not placed at the corresponding line number, and when the cursor position data is “1”, it indicates that the cursor is placed at the corresponding line number. . FIG. 6 shows that the cursor 20 is arranged on the fifth line of the display list.

  The normal buffer stores a transmission list to be transmitted to the display device 2 by normal transmission processing. The list transfer device 3 updates the transmission list based on the latest list. Specifically, the data in the update list is updated to the transmission list. FIG. 7 shows the data structure of the transmission list stored in the normal buffer. The transmission list includes line number data, cursor position data, and ITEM data.

  The transmission list further includes change data. The change data indicates whether or not the song title in the transmission list after the update has been changed from the song title in the transmission list before the update. The change data is recorded for each row number. When the change data is “1”, it indicates that the song title of the row number has been changed from the song title of the transmission list before the update. When the change data is “0”, it indicates that the song title of the line number has not been changed from the song title of the transmission list before the change.

  The operation of the list transfer device 3 in the normal transmission process is as follows. When receiving a list update instruction from the display device 2 displaying the display list of FIG. 3, the list transfer device 3 first creates the latest list according to the list update instruction. For example, if the list update instruction is “next page”, the list transfer device 3 requests and acquires the song titles ITEM11 to ITEM20 from the server 5. Furthermore, the list transfer device 3 acquires cursor position data included in the list update instruction. Then, the list transfer device 3 generates the latest list shown in FIG. 8 including the acquired song titles ITEM11 to ITEM20 and cursor position data.

  Next, the list transfer device 3 updates the transmission list based on the generated latest list. The transmission list before update is as shown in FIG. The list transfer device 3 updates the song titles ITEM1 to ITEM10 in the transmission list before the update to the song titles ITEM11 to ITEM20 in the latest list. Then, the cursor position data of the transmission list is also updated to the cursor position data of the latest list.

  Further, the list transfer device 3 generates change data indicating whether or not the song title of the transmission list after the update has been changed from the song title of the transmission list before the update. In this example, the change data for each row number is “1”.

  Through the above operation, the transmission list is updated to the data structure shown in FIG. The updated transmission list is normally stored in a buffer.

  The list transfer device 3 transmits the updated transmission list to the display device 2. At this time, the list transfer device 3 transmits the updated transmission list to the display device 2 via the cable 4 line by line. Data of each line number (position data, change data, cursor position data, and ITEM data) in the transmission list is referred to as “unit transmission data”.

  When the list transfer device 3 transmits all the unit transmission data, that is, when the transmission of the transmission list is completed, the display device 2 displays the display list shown in FIG.

[Pre-transmission processing and high-speed transmission processing]
It takes a certain amount of time (for example, about 1 second) until the display list is updated by the normal transmission process. As described above, the server 5 stores a large number of song data (2000 songs in this example). Therefore, the user may select a list update instruction several times in succession in order to find a desired song title. For example, when the display list of FIG. 3 is displayed and the user wants to select music data of ITEM 55, the “next page” button may be selected four times in succession. At this time, the list transfer device 3 receives a new list update instruction during the normal transmission process. That is, the list transfer apparatus 3 may receive a list update instruction before the transmission list transmission is completed.

  In such a case, if the transmission list corresponding to the new list update instruction is transmitted after the transmission of the transmission list is completed, it takes time to update the display list displayed on the display device 2. Therefore, in such a case, the list transfer device 3 stops transmission of the transmission list, transmits minimum data indicating an outline of the transmission list, and updates the display list quickly. Specifically, the list transfer device 3 executes a pre-transmission process and a high-speed transmission process.

[Pre-sending process]
The pre-transmission process is a process in which the list transfer device 3 transmits the minimum data in the transmission list when a list update instruction is received during transmission of the transmission list.

  The list transfer device 3 includes a storage buffer in addition to the latest buffer and the normal buffer described above. The basic data shown in FIG. 10 is stored in the storage buffer. The basic data includes change data relating to each position (line number), cursor position data, and line number song title ITEMn whose cursor position data is “1” among data in the normal list table.

  In short, the basic data does not include music title data other than the music title data at the cursor position as compared with the data in the transmission list. The capacity of the song title data is much larger than the change data and cursor position data. Therefore, the basic data has a very small data amount compared to the transmission list.

  For example, after the display list of FIG. 3 is displayed, when a list update instruction of “next page” is selected by a user operation, as shown in FIG. Assume that the update up to the third line has been completed. The transmission list at this time is as shown in FIG.

  Assume that a new list update instruction for “next page” is further selected when the display list is in the state shown in FIG. At this time, the list transfer apparatus 3 receives a list update instruction before completing the transmission of the transmission list shown in FIG.

  Therefore, the list transfer device 3 generates the basic data shown in FIG. 10 from the transmission list shown in FIG. 9 and stores it in the storage buffer. Then, the list transfer device 3 stops transmission of the transmission list and transmits basic data. At this time, the list transfer device 3 transmits basic data regarding a position other than the position where the transmission of the unit transmission data has already been completed in the display list. In this example, transmission of unit transmission data from the first to third rows is completed. Therefore, the list transfer device 3 transmits basic data on and after the fourth line, that is, basic data on the fourth to tenth lines. This is because the update of the metadata in the first to third rows has already been completed.

  Since the basic data has a small amount of data, the transmission time is short. Therefore, the display device 2 completes reception of basic data in a short time. Then, the display list is updated as shown in FIG. 13 based on the basic data in the fourth to tenth lines. That is, the song title shown in FIG. 5 is deleted based on the change data “1” in the basic data. Then, the song title ITEM15 corresponding to the cursor position in the basic data is recorded in the display list and displayed.

  As described above, in the pre-transmission process, instead of stopping transmission of the transmission list in which data has been transmitted halfway, basic data in the transmission list is transmitted to the display device 2 and the display list is updated. In short, instead of transmitting the entire transmission list being transmitted, the list transfer device 3 transmits basic data that is the minimum data of the transmission list, and shortens the update time of the display list. Thereby, although the display device 2 cannot reflect the entire transmission list in the display list, the display device 2 can delete unnecessary song titles from the display list, and can display the latest song title at the position of the cursor 20. Therefore, the user can recognize that the display list has been updated.

  Subsequently, the list transfer device 3 generates a newest list including the song lists ITEM21 to ITEM30 in response to a new list update instruction. After the basic data is stored in the storage buffer, the transmission list is updated based on the latest list. The updated transmission list is as shown in FIG. At this time, change data “1” indicating that the song title has been changed from the transmission list before update (FIG. 9) is registered in all the line numbers (see FIG. 12). Then, using the transmission list shown in FIG. 12, the list transfer device 3 executes high-speed transmission processing.

[High-speed transmission processing]
In the high-speed transmission process, the list transfer device 3 uses the basic data (line number data, change presence / absence data, cursor position data, and song title data when the cursor position data is “1” in the transmission list data shown in FIG. (ITEMn) is transmitted in units. Hereinafter, these data are referred to as “unit basic data”.

  The unit basic data has a smaller data amount than the unit transmission data. Therefore, the display list update completion time is shortened compared to the normal transmission process. The display list displayed on the display device 2 after the high-speed transmission processing is completed is, for example, as shown in FIG.

  In short, in the high-speed transmission process, the song titles ITEMn other than the song title ITEM25 at the portion where the cursor is arranged are not displayed. Thereby, the display list can be updated quickly, and the user can easily recognize that the display list has been updated with reference to the song title ITEMn at the position of the cursor 20.

  When a new list update instruction is not transmitted after the high-speed transmission process is completed, the list transfer apparatus 3 executes the normal transmission process using the transmission list shown in FIG. As a result, the display list of the display device 2 sequentially displays the song titles from the first line as shown in FIG.

  As described above, when the list transfer device 3 receives a new list update instruction during transmission of the transmission list, the list transfer device 3 displays the minimum data (basic data) in the transmission list being transmitted by the pre-update process. Transmit to device 2. Thereby, the display list of the display device 2 is updated. The list transfer device 3 further transmits basic data of a transmission list corresponding to a new list update instruction to the display device 2 by high-speed transmission processing.

  By the above operation, when the “next page” list update instruction is selected a plurality of times in succession, the pre-transmission process and the high-speed transmission process are repeatedly executed. The display device 2 sequentially updates the song title at the cursor position in the display list, and does not display the song title in the other rows of the display list. As described above, when the list update instruction is continuously executed a plurality of times, the list display device 1 displays and updates the minimum data on the display list. Thereby, the update time of a display list can be shortened. Furthermore, the user can easily determine that the display list has been updated by watching how the song title in the cursor 20 is updated. Furthermore, since the song titles that are no longer required by the list update instruction are deleted from the display list, it is difficult for the user to mistake the display list update.

  Details of the operation of the list transfer device 3 will be described below.

[Details of operation of list display device 1]
The list transfer device 3 executes the list generation process and the list transfer process in parallel. As described above, the list transfer program is stored in the HDD 103 of the list transfer device 3. The list transfer program includes a list generation module and a list transfer module. The list generation module executes list generation processing. Specifically, the list generation module generates a latest list, a transmission list, and basic data. The list transfer module executes list transfer processing. Specifically, the list transfer module transmits the transmission list and basic data to the display device 2. Each module operates in parallel.

[Normal transmission processing]
FIG. 16 is a flowchart showing details of the list generation processing. Referring to FIG. 16, when the list generation module executed by CPU 101 in list transfer device 3 receives a list update instruction from display device 2 (YES in S1), the list generation module updates the latest list according to the list update instruction. Generate (S2). For example, when the display device 2 displays the display list shown in FIG. 3 and the list update instruction received by the list transfer device 3 is “cursor DOWN”, the list generation module displays the latest list shown in FIG. Among them, the “cursor position” data is updated, and “1” is recorded only in the line number 6. Other data is not updated.

  On the other hand, when the list update instruction is “next page”, the list generation module requests and acquires the song titles ITEM11 to ITEM20 listed in the song list on the next page from the server 5. Then, the list generation module generates the latest list shown in FIG.

  Next, the list generation module determines whether the normal transmission process or the high-speed transmission process is currently being executed (S3). The list generation module confirms the transmission flag Sending stored in the memory 102. As will be described later, the transmission flag Sending is not “fin” while the normal transmission process or the high-speed transmission process is executed.

  As a result of confirming the transmission flag Sending, if the flag Sending = fin, that is, if the normal transmission process and the high-speed transmission process are not currently being executed (NO in S3), the list generation module transmits based on the latest list. The list is updated (S4). Then, the list generation module instructs a normal transmission process (S5). In the memory 102 of the list transfer device 3, a transmission flag Sending, a pre-transmission flag Presend, and a high-speed transmission flag Fastsend are recorded. In the transmission flag Sending, each line number 1 to 10 of the transmission list or basic data is registered, or “fin” indicating that the transmission processing is stopped is registered. On the other hand, “TRUE” or “FALSE” is registered in the pre-transmission flag Presend and the high-speed transmission flag Fastsend. When the flag Presend or Fastsend is “TRUE”, it indicates that the flag is set. When the flag Presend or Fastsend is “FALSE”, it indicates that the flag is not set.

  In step S5, the list generation module sets the flag Sending to “1” and sets the flags Presend and Fastsend to “FALSE”.

  FIG. 17 is a flowchart showing details of the list transmission process. The list transmission process is realized by a list transmission module executed by the CPU 101 of the list transfer apparatus 3.

  The list transmission module executes list transmission processing every predetermined period. Referring to FIG. 17, the list transmission module refers to each flag stored in memory 102 and identifies a transmission process to be executed (S21 to S23). In this example, the flag Sending = 1 (YES in S21), the flag Presend = FALSE (NO in S22), and the flag Fastsend = FALSE (NO in S23). Therefore, the list transmission module executes normal transmission processing (S100).

  In the normal transmission process, the list transmission module first transmits unit transmission data in the first row of the transmission list to the display device 2 (S101). The display device 2 receives the unit transmission data on the first line, and updates the first line of the display list based on the unit transmission data.

  Subsequently, the list transmission module determines whether or not the flag “Presend” has been changed to “TRUE” (S102). Here, it is assumed that the flag Presend remains “FALSE” (NO in s102). At this time, the process proceeds to step S103, and the list transmission module determines whether or not all unit transmission data in the transmission list has been transmitted (S103). Specifically, the list transmission module determines whether or not the flag Sending in the memory 102 has become “10”. Here, since Sending = 1 (NO in S103), the flag Sending is incremented to “2”, and the process returns to step S101.

  In short, the list transmission module transmits unit transmission data of each row number 1 to 10 in the transmission list unless the flag Presend becomes “TRUE”. The display device 2 updates the display list based on the unit transmission data (transmission list).

  When the transmission of the transmission list is completed (YES in S103), the list transmission module sets the flag Sending in the memory 102 to “fin” and ends the normal transmission process.

[Pre-sending process]
As described above, when the display device 2 displays the display list of FIG. 3, the “next page” list update instruction is selected. As a result, the transmission list shown in FIG. 9 is generated, and the normal transmission process is performed. Assume that it has been executed. Then, it is assumed that after the unit transmission data up to the third line is transmitted and the display list is updated as shown in FIG. 11, a new “next page” list update instruction is selected.

  At this time, referring to FIG. 16, the list generation module in list transfer device 3 receives a list update instruction (S1) and generates the latest list (S2). Then, the list generation module determines whether the normal transmission process or the high-speed transmission process is being executed (S3). At this time, normal processing is executed, and the flag Sending = 4. Therefore, the list generation module determines that the normal transmission process or the high-speed transmission process is being executed (YES in S3). At this time, the list generation module further determines whether or not pre-transmission processing is being executed (S6). Specifically, the list generation module refers to the flag “Presend” in the memory 102. Here, since the flag “Presend” is “FALSE” (NO in S6), the list generation module prepares for the pre-transmission process (S8 to S10).

  Specifically, the list generation module reads the basic data (FIG. 10) from the current transmission list (FIG. 9) and stores it in the storage buffer (S8). Subsequently, the list generation module updates the transmission list (S9). Specifically, the list generation module updates the transmission list to the update list data generated in step S2. And the change data which show that the music title of the transmission list after an update changed from the music title of the transmission list before an update is updated, and the transmission list shown in FIG. 12 is produced | generated. The updated transmission list is normally stored in a buffer.

  The list generation module instructs pre-transmission processing and high-speed transmission processing (S10). Specifically, the flags Presend and Fastsend stored in the memory 102 are set to “TRUE”. On the other hand, the flag Sending is not changed. That is, the flag Sending = 4 is maintained.

  Referring to FIG. 17, the list transmission module is executing a normal transmission process (S100). However, the list transmission module determines that the flag “Presend” has been changed to “TRUE” (YES in S102). Therefore, the list transmission module stops the normal transmission process and returns to step S21.

  The list transmission module refers to each flag stored in the memory 102 and determines that the flag Sending is not “fin” (YES in S21) and the flag Present is “TRUE” (YES in S22). Therefore, the list transmission module executes a pre-transmission process (S200).

In the pre-transmission process, the list transmission module transmits the basic data in the storage buffer to the display device 2 (S201). At this time, the list transmission module refers to the flag Sending = 4, and transmits basic data after the line number “4”, that is, unit basic data of the line numbers 4 to 10. In short, basic data relating to metadata arranged in other positions (fourth to tenth) than the positions where transmission has already been completed (first to third rows) is transmitted.
The transmission process in step S201 is not interrupted until the basic data transmission is completed. The display device 2 that has received the basic data updates the display list shown in FIG. Thereby, the user can easily recognize that the display list has been updated.

  After transmitting the basic data, the list transmission module sets the flag “Presend” to “FALSE” and sets the flag Sending = 1 (S202). Fastsend is not changed. That is, the flag Fastsend = TRUE.

[High-speed transmission processing]
Subsequently, returning to step S21, the list transmission module refers to each flag stored in the memory 102 and identifies a transmission process to be executed (S21 to S23). At this time, the list transmission module determines that the flag Sending is not “fin” (YES in S21), the flag Present is “FALSE” (NO in S22), and the flag Present is “TRUE” (S23). YES). Therefore, the list transmission module executes high-speed transmission processing (S300).

  In the high-speed transmission process, the list transmission module reads unit basic data in the first row of the transmission list (FIG. 12) updated in step S9 (see FIG. 16), and transmits it to the display device (S301). Subsequently, the list transmission module determines whether or not the flag “Presend” is “TRUE” (S302). That is, it is determined whether a new list update instruction has been received during the high-speed transmission process.

  If the flag Presend is “FALSE” (NO in S302), that is, if no new list update instruction has been received during the high-speed transmission process, has the list transmission module transmitted all unit transmission data in the transmission list? It is determined whether or not (S303). Specifically, the list transmission module determines whether or not the flag Sending in the memory 102 has become “10”. Here, since Sending = 1 (NO in S303), the flag Sending is incremented to “2”, and the process returns to step S301.

  In short, the list transmission module transmits the unit basic data of the respective line numbers 1 to 10 in the transmission list unless the flag “Presend” becomes “TRUE”. The display device 2 updates the display list based on the unit basic data (transmission list). The updated display list is as shown in FIG.

  When the transmission of the basic data in the transmission list (unit basic data of line numbers 1 to 10) is completed (YES in S303), the list transmission module sets the flag Fastsend in the memory 102 to “FALSE” and sets the flag Sending = 1. (S25). With the above operation, the high-speed transmission process ends. After executing Step S25, the process returns to Step S21.

  The list transmission module again refers to each flag stored in the memory 102 and identifies a transmission process to be executed (S21 to S23). At this time, the flag Sending = 1 (YES in S21), and the flags Presend and Fastsend are both “FALSE” (NO in S22, NO in S23). Therefore, the list transmission module executes normal transmission processing (S100). The display device 2 updates the display list as shown in FIG. 15 based on the unit transmission data transmitted by the normal transmission process.

  With the above operation, the list transfer device 3 executes the normal transmission process, the advance transmission process, and the high-speed transmission process in response to the list update instruction.

  When a new list update instruction is selected during execution of the high-speed transmission process (S300) in FIG. 17, the list generation module stores the basic data in the storage buffer (S8 in FIG. 16) and transmits After updating the list (S9 in FIG. 16), prior transmission processing and high-speed transmission processing are instructed (S10 in FIG. 16). Therefore, the list transmission module determines that the flag “Presend” has been changed to “TRUE” during the high-speed transmission process (YES in S302 in FIG. 17). In this case, the list transmission module interrupts the high-speed transmission process and returns to step S21. Then, it is determined that the flag Presend is “TRUE” (YES in S22), and a pre-transmission process is executed (S200).

  When a new list update instruction is selected during the pre-transmission process, the list transmission module continues the pre-transmission process (S200 in FIG. 17). On the other hand, the list generation module updates the transmission list (S7). As a result, the high-speed transmission process is executed based on the updated transmission list (S300).

  When the list transfer device 3 receives a list update instruction for “cursor DOWN” or “cursor UP”, when the advance transmission process and the high-speed transmission process are executed, the change data included in the basic data is set to “0”. Become. In this case, the song title in the display list is not deleted, and the display device 2 maintains the display of the song title. In short, in principle, the cursor 20 only moves in the advance transmission process and the high-speed transmission process according to the cursor DOWN and cursor UP list update instructions.

  As described above, when the list display apparatus 1 receives a new list update instruction in the middle of executing the normal transmission process (S100) or the high-speed transmission process (S300), the basic list of the transmission list being transmitted by the pre-transmission process is obtained. Data is transmitted, and basic data of the transmission list updated to the latest list is sequentially transmitted by high-speed transmission processing. Therefore, when the list update instruction is selected a plurality of times in succession, the display device 2 sequentially updates the display list based on the basic data. Therefore, when the list update instruction for “next page” is selected a plurality of times, the song title in which the cursor is placed is sequentially changed in the display list, and the other lines in the display list are blank. The user can easily recognize that the display list is sequentially changed by looking at the song title at the cursor position. Further, the display list update time corresponding to the list update instruction can be shortened. Further, since the normal transmission process is executed after the high-speed transmission process is completed, the song title is finally displayed on all the lines in the display list.

In the above-described embodiment, the basic data transmitted to the display device 2 by the pre-transmission process includes the change data for each line number and the song title at the cursor position. However, the basic data may not include the song title at the cursor position. In this case, the basic data includes change data. If the display list is updated with the change data, the user can easily determine whether or not the display list has been updated.
In the above-described embodiment, in the pre-transmission process, the list transfer device 3 refers to the flag Sending, and includes basic data including change data and metadata of positions other than the already transmitted positions in the display list. Send. However, the list transfer apparatus 3 may transmit all basic data (change data and metadata in the first to tenth lines in this example) in the advance transmission process.
In the above-described embodiment, the specified position in the display list is displayed with the cursor. However, the display method of the designated position is not limited to the cursor. The designated position may be displayed with an icon other than the cursor, or the metadata corresponding to the designated position may be rendered differently from the rendering of other metadata, such as bolding the metadata corresponding to the designated position.

  In the above-described embodiment, the display list includes ten song titles. However, the number of song titles may be k (k is a natural number) that is greater than or less than 10 in the display list. In this case, the flag Sending is 1 to k or fin.

  In the above-described embodiment, the metadata is the song title, but the metadata may be data other than the song title. For example, the metadata may be an artist name or a playback time.

  In the above-described embodiment, the content data is music data, but the content data may be content data other than music data. The content data may be, for example, video data, image data, or audio data.

  While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

1 List display device 2 Display device 3 List transfer device 4 Cable 5 Server 20 Cursor 105 Display

Claims (7)

A list transfer device connectable to a display device for displaying a display list in which metadata of a plurality of content data is enumerated,
In response to an instruction to update the display list, a list updating unit that includes a plurality of metadata and data related to a specified position in the display list, and updates a transmission list used by the display device to update the display list;
Change data generation means for generating change data indicating whether or not the metadata of the updated transmission list has been changed from the metadata of the transmission list before the update;
Normal transmission means for transmitting the updated transmission list to the display device;
When a new update instruction is received before the transmission of the transmission list is completed, transmission of the transmission list is stopped, and the transmission device transmits the change data to the display device;
After the transmission of the change data is completed, the metadata corresponding to the designated position in the transmission list updated according to the new update instruction, the change data created according to the new update instruction, And a high-speed transmission means for transmitting first basic data used by the display device for updating the display list. The list transfer device according to claim 1,
The advance transmission means further stops the transmission of the first basic data when receiving a new update instruction before the transmission of the first basic data is completed, and transmits the changed data to the display device. List transfer device to send. The list transfer device according to claim 1 or 2, wherein
The pre-transmission unit further includes metadata corresponding to the designated position in the transmission list and the change data, and transmits second basic data used by the display device for updating the display list. List transfer device. The list transfer device according to any one of claims 1 to 3,
The list transfer device further includes:
Change data storage means for storing the change data transmitted by the advance transmission means;
The transmission list updating unit updates the transmission list after the change data storage unit stores the change data. The list transfer device according to any one of claims 1 to 4,
The display list update unit deletes the metadata in the display list based on the change data when the metadata of the updated transmission list is changed from the metadata of the transmission list before the update. The list transfer device that maintains the display of the metadata in the display list when the metadata of the updated transmission list is not changed from the metadata of the transmission list before the update. The list transfer device according to any one of claims 1 to 5,
A display device connected to the list transfer device, displaying a display list in which metadata of the plurality of content data is enumerated, and updating the display list according to data transmitted from the list transfer device; List display device. A computer in a list transfer device connectable to a display device that displays a display list in which metadata of a plurality of content data is enumerated
In response to an instruction to update the display list, including a plurality of metadata and data related to a designated position in the display list, and updating the transmission list used by the display device to update the display list;
Generating change data indicating whether or not the updated metadata of the transmission list has been changed from the metadata of the transmission list before the update;
Transmitting the updated transmission list to the display device;
When receiving a new update instruction before transmission of the transmission list is completed, stopping transmission of the transmission list and transmitting the change data to the display device;
After the transmission of the change data is completed, the metadata corresponding to the designated position in the transmission list updated according to the new update instruction, the change data created according to the new update instruction, And a step of transmitting first basic data used by the display device for updating the display list.

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