JP2005114861A - Audio reproducing device, audio reproducing program, computer readable recording medium in which audio reproducing program is recorded and audio reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce past reproducing history of audio data in accordance with the moving path of an audio reproducing device. <P>SOLUTION: An audio reproducing device 100 is provided with a measuring section 18 which measures the location of the device 100, a storage section 14 which stores an area database 60 and a CPU10 which controls operations of the device 100. The area database 60 records the reproducing frequency of audio data being reproduced when the device 100 moves from one area to a next area. A reproducing frequency device 100 refers to the area database 60 and selects audio data which are reproduced with the highest frequency when the device 100 moves from the present area to other area in the past. The device 100 reproduces the selected audio data after it moves from the present area to the other area. Thus, the past reproducing history of the audio data adaptive to the moving path of the device 100 is reproduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus, a method, a program for reproducing sound, and a computer-readable recording medium on which the program is recorded.

An audio reproduction device that selects and reproduces audio data according to the user's situation is disclosed (see, for example, Patent Documents 1 to 6).
JP 2003-140664 A JP 2003-14468 A JP 2002-230315 A JP 2001-343979 A JP-A-8-63946 JP 2003-150176 A

  An object of the present invention is to provide an audio reproduction technique capable of reproducing a past reproduction history of audio data corresponding to a moving path of an audio reproduction device.

  One aspect of the present invention relates to an audio reproduction device for reproducing audio data. This audio reproduction device includes a position measuring device that measures the position of the audio reproduction device, and an area that records one or more data sets in association with each of the areas where the audio reproduction device has entered among a plurality of predetermined two-dimensional areas. A first storage device for storing the database and a control device for controlling the operation of the audio reproduction device are provided. Each data set is played back when the voice playback device moves from the one area to the next area, as well as the identification codes of the previous area and the next area located before and after the one area on the moving path of the voice playback device. It contains the identification code and playback frequency of the audio data. The control device arrives at the identified area from the step of identifying the area where the sound reproducing device is located according to the position measured by the position measuring device and the data set associated with the identified area. The step of selecting a data set including the identification code of the area where the sound reproducing device has just entered before as the identification code of the previous area and including the highest reproduction frequency, and the sound reproducing device according to the position measured by the position measuring device Detecting the movement between the areas, and acquiring and reproducing the audio data according to the identification code of the audio data included in the selected data set when the movement between the areas of the audio reproducing apparatus is detected. And execute steps.

  The audio reproduction device of the present invention selects audio data that has been reproduced with a high frequency when the audio reproduction device has moved from the current area to another area in the past, and the audio data after moving from the current area to another area. Play. Thereby, it is possible to reproduce the past reproduction history of the audio data according to the moving path of the audio reproducing apparatus with a certain probability. The movement path is identified by the identification codes of the previous area and the current area, and no audio data is selected from a data set having a previous area different from the current movement path. Therefore, the past reproduction history can be reproduced with a sufficiently high probability. Also, the audio data reproduced after the area change is selected without specifying the destination area. This reduces the processing load on the audio playback device. Further, since the audio data to be reproduced after the area change is selected in advance before the area change, the audio data to be reproduced can be switched quickly and smoothly after the area change.

  The audio reproduction device may further include an audio processing device that converts audio data acquired by the control device into an audio signal. In this case, the above-described step of acquiring and reproducing the audio data transfers the acquired audio data to the audio processing device. The sound signal converted from the sound data by the sound processing device causes the sound output device such as a speaker or a headphone to generate sound corresponding to the sound data. The audio output device may be built in the audio reproduction device or may be externally attached to the audio reproduction device.

  The control device includes an identification code of the destination area as an identification code of the next area from the data set associated with the source area when movement between the areas of the audio playback device is detected, And a step of searching for a data set including an identification code of audio data that has been reproduced when movement between areas is detected, and when the data set is found, the reproduction frequency in the detected data set is determined. When the data set is incremented by 1 and the data set is not found, a step of associating the data set with the movement source area and registering it in the area database may be further executed. Here, the registered data set includes the identification code of the destination area as the identification code of the next area, the identification code of the audio data that was reproduced when the movement between the areas was detected, and the reproduction frequency 1 is included.

  In this case, the area database is automatically updated without requiring user operation in accordance with the movement of the audio playback device between the areas. Therefore, it is possible to reproduce the past reproduction history of the audio data without increasing the work burden on the user.

  The data set included in the area database may further include the last reproduction date and time of the audio data that was being reproduced when the audio reproduction device moved from one area to the next area. The above step of selecting the data set with the highest playback frequency includes the last playback date and time closest to the current date and time among the multiple data sets when there are multiple data sets with the highest playback frequency. A data set may be selected.

  In this case, since the audio data matching the user's recent preferences is preferentially reproduced, the user's satisfaction is increased.

  The audio reproduction device may further include a second storage device that stores an audio database associated with each of the areas where the audio reproduction device has entered. One or more reproduction history data may be recorded in the audio database. Each reproduction history data may include an identification code and reproduction frequency of audio data reproduced in an area associated with the audio database. The control device sorts the reproduction history data in descending order of reproduction frequency in the audio database associated with the area where the audio reproduction device is currently located after the above steps of acquiring and reproducing the audio data, You may further perform the step which acquires and reproduce | regenerates the audio | voice data corresponding to the identification code contained in reproduction history data in order from the head of reproduction history data.

  In this case, even when the audio data selected according to the area database does not meet the user's preference, after the selected audio data, a song having a high reproduction frequency is preferentially given in the area where the audio reproduction device is currently located. Played. Therefore, audio data that matches the user's preference according to the area is reproduced with high probability, and user satisfaction is ensured.

  The audio reproduction device of the present invention may further include a third storage device. The areas may be congruent rectangles arranged alternately. In this case, one area is surrounded by the other six areas. The number of areas surrounding one area can be reduced as compared to the aligned rectangular areas. Accordingly, the number of data sets in the area database is reduced. Therefore, the size of the area database and the storage capacity of the first storage device can be suppressed. The third storage device may store two diagonal coordinates of each area in association with each area. Each coordinate may be composed of longitude and latitude. The above-mentioned step of specifying the area where the sound reproducing device is located may specify the area where the sound reproducing device is located according to the position measured by the position measuring device and the two coordinates of the diagonal of the area. In this case, since map data for each area is unnecessary, the storage capacity required for data defining the area can be reduced.

  Another aspect of the present invention relates to an audio reproduction program for controlling an audio reproduction device and reproducing audio data. An audio reproduction device includes a position measuring device that measures the position of the audio reproduction device, and an area database that records one or more data sets in association with each of the areas where the audio reproduction device has entered among a plurality of predetermined two-dimensional areas. And a first storage device for storing. Each data set is played back when the voice playback device moves from the one area to the next area, as well as the identification codes of the previous area and the next area located before and after the one area on the moving path of the voice playback device. It contains the identification code and playback frequency of the audio data. The sound reproduction program of the present invention is identified from the step of identifying the area where the sound reproduction device is located and the data set associated with the identified area according to the position measured by the position measuring device. The step of selecting a data set including the identification code of the area that the sound reproducing apparatus has entered immediately before reaching the area as the identification code of the previous area and including the highest reproduction frequency, and according to the position measured by the position measuring device Detecting the movement between the areas of the audio reproduction device, and detecting the movement between the areas of the audio reproduction device according to the identification code of the audio data included in the selected data set when the movement between the areas of the audio reproduction device is detected. And causing the audio playback device to execute the step of acquiring and playing back.

  According to the audio reproducing program of the present invention, the audio reproducing device selects audio data that has been reproduced with high frequency when the audio reproducing device has moved from the current area to another area in the past, and The audio data is played after moving to. Therefore, the audio reproduction device can reproduce the past reproduction history of the audio data according to the movement path of the audio reproduction device with a certain probability. The movement path is identified by the identification codes of the previous area and the current area, and no audio data is selected from a data set having a previous area different from the current movement path. Therefore, the past reproduction history can be reproduced with a sufficiently high probability. Also, the audio data reproduced after the area change is selected without specifying the destination area. This reduces the processing load on the audio playback device. For this reason, the audio reproduction program of the present invention can be easily applied to a portable audio reproduction apparatus. Further, since the audio data to be reproduced after the area change is selected in advance before the area change, the audio data to be reproduced can be switched quickly and smoothly after the area change.

  The music playback program of the present invention uses the identification code of the destination area to identify the next area from the data set associated with the source area when movement between the areas of the audio playback device is detected. Searching for a data set that contains the identification code of the audio data that was included as a code and that was being played when movement between areas was detected, and if the data set was found, in the discovered data set If the data set is incremented by 1 and the data set is not found, the audio reproducing apparatus may further execute a step of associating the data set with the movement source area and registering it in the area database. Here, the registered data set includes the identification code of the destination area as the identification code of the next area, the identification code of the audio data that was reproduced when the movement between the areas was detected, and the reproduction frequency 1 is included.

  In this case, the area history data is automatically updated without requiring a user operation in accordance with the movement of the audio playback device between the areas. Therefore, it is possible to reproduce the past reproduction history of the audio data without increasing the work burden on the user.

  The data set included in the area database may further include the last reproduction date and time of the audio data that was being reproduced when the audio reproduction device moved from one area to the next area. The above step of selecting the data set with the highest playback frequency includes the last playback date and time closest to the current date and time among the multiple data sets when there are multiple data sets with the highest playback frequency. A data set may be selected.

  In this case, since the audio data matching the user's recent preferences is preferentially reproduced, the user's satisfaction is increased.

  The audio reproduction device may further include a second storage device that stores an audio database associated with each of the areas where the audio reproduction device has entered. One or more reproduction history data may be recorded in the audio database. Each reproduction history data may include an identification code and reproduction frequency of audio data reproduced in an area associated with the audio database. The audio reproduction program according to the present invention includes a step of sorting reproduction history data in descending order of reproduction frequency in an audio database associated with an area where the audio reproduction device is currently located after the above steps of acquiring and reproducing audio data. The audio reproducing apparatus may further execute a step of acquiring and reproducing audio data corresponding to the identification code included in the reproduction history data in order from the top of the sorted reproduction history data.

  In this case, even when the audio data selected according to the area database does not meet the user's preference, after the selected audio data, a song having a high reproduction frequency is preferentially given in the area where the audio reproduction device is currently located. Played. Therefore, audio data that matches the user's preference according to the area is reproduced with high probability, and user satisfaction is ensured.

  The areas may be congruent rectangles arranged alternately. In this case, one area is surrounded by the other six areas. The number of areas surrounding one area can be reduced as compared to the aligned rectangular areas. Accordingly, the number of data sets in the area database is reduced. Therefore, the size of the area database and the storage capacity of the first storage device can be suppressed. The audio reproduction device may further include a third storage device that stores two diagonal coordinates of each area in association with each area. Each coordinate may be composed of longitude and latitude. The above-mentioned step of specifying the area where the sound reproducing device is located may specify the area where the sound reproducing device is located according to the position measured by the position measuring device and the two coordinates of the diagonal of the area. In this case, since map data for each area is unnecessary, the storage capacity required for data defining the area can be reduced.

  The audio reproduction program of the present invention may be recorded on a computer-readable recording medium. The audio reproducing device may further include a reading device for the recording medium, and may read the audio reproducing program from the recording medium and execute the above steps. In addition, an audio reproduction program read from a recording medium by a separate computer may be transferred to the audio reproduction device, and the audio reproduction device may read the program and execute the above steps.

  Still another aspect of the present invention relates to a method for reproducing audio data by controlling an audio reproducing device. This audio reproduction device includes a position measuring device that measures the position of the audio reproduction device, and an area that records one or more data sets in association with each of the areas where the audio reproduction device has entered among a plurality of predetermined two-dimensional areas. And a first storage device for storing a database. Each data set is played back when the voice playback device moves from the one area to the next area, as well as the identification codes of the previous area and the next area located before and after the one area on the moving path of the voice playback device. It contains the identification code and playback frequency of the audio data. According to the audio reproduction method of the present invention, an area in which the audio reproduction apparatus is located is identified according to the position measured by the position measuring device, and the data set associated with the identified area is identified. The step of selecting a data set including the identification code of the area that the sound reproducing apparatus has entered immediately before reaching the area as the identification code of the previous area and including the highest reproduction frequency, and according to the position measured by the position measuring device Detecting the movement between the areas of the audio reproduction device, and detecting the movement between the areas of the audio reproduction device according to the identification code of the audio data included in the selected data set when the movement between the areas of the audio reproduction device is detected. And causing the audio playback device to execute the step of acquiring and playing back.

  ADVANTAGE OF THE INVENTION According to this invention, the past reproduction | regeneration log | history of the audio | voice data according to the movement path | route of an audio | voice reproduction apparatus can be reproduced by a comparatively simple process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic diagram showing an audio playback device 100 of the present embodiment. The audio reproducing device 100 is a portable music player having a communication function. An audio output device 17 (headphones in FIG. 1) can be connected to the device 100. The apparatus 100 has an antenna 19 for receiving a GPS signal 42 from a GPS satellite 40. In addition, the device 100 includes an input device 22 such as buttons and dials used to operate the device 100, and a display device 24 for displaying various types of information such as identification information of the sound being played back.

  Hereinafter, the configuration of the audio reproduction device 100 will be described in more detail with reference to FIG. FIG. 2 is a block diagram illustrating a configuration of the music playback device 100.

  The audio reproduction device 100 is a single computer. The apparatus 100 includes a CPU (Central Processing Unit) 10, a RAM (Random Access Memory) 12, a storage unit 14, an audio processing unit 16, a measurement unit 18, a communication device 20, an input device 22, and A display device 24 is included. These components are connected to each other by a bus 30. Data and control signals are transmitted between these components over bus 30.

  The CPU 10 executes a sound reproduction program and thereby controls the operation of the sound reproduction device 100. The RAM 12 is a main storage device that is used by the CPU 10 to execute a sound reproduction program. The RAM 12 stores a sound reproduction program executed by the CPU 10 and data necessary for the execution. The RAM 12 is also used as a work area during program execution.

  The storage unit 14 includes an internal memory 14 a and a reading device 14 b for the external memory 15. The built-in memory 14 a is a storage device that is fixed inside the audio playback device 100. The built-in memory 14a is, for example, a nonvolatile memory such as an EPROM or a hard disk drive. The reading device 14 b is a device for reading data from the external memory 15 that is detachable from the sound reproducing device 100. The external memory 15 is, for example, a CD-ROM, a DVD-ROM, or various card type memories. The internal memory 14a and the external memory 15 store audio data to be reproduced by the device 100. In this embodiment, each audio data represents one music piece. Hereinafter, the audio data representing the music is referred to as “music data”. Furthermore, in the present embodiment, an audio playback program, a music database, and an area database, which will be described later, are stored in the built-in memory 14a.

  The audio processing unit 16 includes an electric circuit that performs processing for reproducing the song data stored in the storage unit 14. The audio processing unit 16 is connected to an audio output device 17 that emits sound corresponding to music data. The audio processing unit 16 generates an electrical audio signal corresponding to the music data and sends it to the audio output device 17. The audio output device 17 emits sound according to the audio signal. As shown in FIG. 1, the audio output device 17 may be headphones. In addition, the audio output device 17 may be a speaker built in the audio reproduction device 100.

  The measurement unit 18 includes a device for examining the status of the audio reproduction device 100. Specifically, the measurement unit 18 has a GPS receiver 18 a for measuring the position of the audio reproduction device 100. The GPS receiver 18 a receives a GPS signal 42 from the GPS satellite 40 through the antenna 19 and sends GPS positioning data to the CPU 10.

  The communication interface 20 is a device that controls communication between the audio reproduction device 100 and other devices on an external communication network. The communication interface 20 is connected to a communication network via a communication line as necessary. The apparatus 100 can receive information such as song data from the communication network via the communication interface 20. Information received from the communication network can be stored in the storage unit 14. The communication interface 20 may be, for example, a mobile phone unit or a PHS unit for connecting to a telephone line network. In addition, the communication interface 20 may be a wireless or wired LAN interface or a USB interface for connecting to a computer network.

  The input device 22 is a device operated by a user in order to input an operation command to the sound reproduction device 100. In addition to the buttons and dials described above, the input device 22 may be a keyboard or a voice recognition device that discriminates voices uttered by the user. The display device 24 displays various types of information such as the title of music being played and the playback time.

  As will be described later, the audio reproduction device 100 has two reproduction modes. One is a user selection mode for reproducing music data selected by the user, and the other is a path selection mode for selecting and reproducing music data according to the movement path of the apparatus 100. The user can specify one of these modes by operating the input device 22 after starting the music playback program.

  In this embodiment, the history of the reproduced music data is recorded in two databases, that is, an area database and a music database. These databases are stored in the built-in memory 14a. FIG. 3 shows the configuration of the built-in memory 14a. The built-in memory 14a includes a music playback program storage area 50, an area database storage area 51, a music database storage area 52, a song data storage area 53, and an area definition data storage area 54. Yes.

FIG. 4 is a schematic diagram showing the configuration of the area database 60. In the area database 60, various pieces of information related to the area where the audio reproduction device 100 has entered among a plurality of predefined areas are recorded. FIG. 5 shows a part of these areas. The X direction in FIG. 5 indicates longitude, and the Y direction indicates latitude. The longitude and latitude are in minutes. As shown in FIG. 5, the areas 80 are congruent quadrangular regions arranged alternately along the longitude direction and the latitude direction. Each area 80 is defined by area definition data. Each area definition data is stored in the storage area 54 of the built-in memory 14a in association with each area 80. Each area definition data is composed of two diagonal coordinates of the corresponding area. In the present embodiment, the area definition data is composed of the coordinates of the southwest end and the northeast end of the corresponding area. However, the area definition data may be composed of two coordinates on another diagonal, that is, the coordinates of the northwest end and the southeast end of the corresponding area. Each coordinate contains a set of longitude and latitude. For example, area definition data area 80 ₀ shown in FIG. 5, (8280,2169) - can be represented as (8281,2171). The former is the coordinates of the southwestern edge area 80 _0, the latter being the coordinates of the northeastern edge area 80 _0.

  As shown in FIG. 4, the area database 60 has four items: an area index (“A-idx” in FIG. 4), the above-described area definition data, an adjacent area list, and area passage information. Each line composed of these four items is area history data 62. The area index is an identification code assigned to each area 80. The area definition data is read into the area database 60 from the storage area 54 of the built-in memory 14a. In the adjacent area list, an index of an area adjacent to the target area identified by the area index is recorded. In the area passing information, the moving path of the audio playback device 100, the identification code of the music data played back along the path, the playback frequency, and the last playback date and time are recorded. The movement path includes an identification code of an area (“previous area”) where the audio reproduction device 100 was located before entering the target area, and an area (“next area”) to which the audio reproduction device 100 moves from the target area. And an identification code. The identification code of the song data is called “music index”. The music index in one area history data 62 indicates music data that was being reproduced when the audio reproducing device 100 moved from the target area to the next area. In FIG. 4, the previous area is Ap, the next area is An, the song index is M-idx, the reproduction frequency is N, and the last reproduction date is D. These data elements constitute one data set 64. As will be described later, each area history data 62 is recorded with one or more data sets 64.

  FIG. 6 is a schematic diagram showing the configuration of the music database 70. The music database 70 is created for each area 80 into which the audio playback device 100 has entered. As shown in FIG. 6, the area database 70 has four items: a song index (“M-idx” in FIG. 6), source information, reproduction frequency, and last reproduction date and time. Each line composed of these four items is reproduction history data 72. The song index is an identification code attached to each song data. The source information indicates the source of music data. The source may be one location in a hard disk drive or flash memory as the internal memory 14a, or one location in a CD-ROM or DVD-ROM as the external memory 15. Further, the location on the network to which the audio reproduction device 100 can be connected via the communication interface 20 may be the source. The reproduction frequency and the last reproduction date / time indicate the number of times that the song data identified by the song index is reproduced in the area associated with the music database 70 and the date / time when the song data was last reproduced.

  Hereinafter, the operation of the audio reproduction device 100 will be described in detail with reference to FIGS. 7 to 13. FIG. 7 to FIG. 13 are flowcharts showing the audio reproduction processing of this embodiment. This sound reproduction process is executed according to a sound reproduction program stored in the built-in memory 14a. The CPU 10 reads an audio reproduction program from the built-in memory 14a into the RAM 12 and executes it in accordance with a command input using the input device 22.

  In this audio reproduction process, an initialization process is first executed (step S702). In the initialization process, the CPU 10 determines in which predetermined area the audio reproduction device 100 is located according to the positioning data sent from the GPS receiver 18a. Thereafter, the audio reproduction device 100 waits for a user to specify a reproduction mode.

  Hereinafter, the initialization process will be described in detail with reference to FIG. FIG. 8 is a flowchart showing the initialization process. In the initialization process, the CPU 10 first measures the current position of the audio playback device 100 and identifies the area 80 where the device 100 is currently located, that is, the current area (step S802). A GPS receiver 18a is used to measure the current position of the device 100. The CPU 10 acquires positioning data from GPS satellites using the GPS receiver 18a. This positioning data includes a set of longitude and latitude indicating the position of the device 100.

  As described above, the built-in memory 14a stores coordinate data defining a plurality of areas 80, and the coordinate data is composed of the coordinates of the southwest end and the northeast end of one area. The CPU 10 refers to these coordinate data and identifies which area 80 includes the longitude and latitude of the GPS positioning data. In this way, the current area where the device 100 is located is specified.

  Next, the CPU 10 determines whether or not the specified current area is already registered in the area database 60 (step S804). The CPU 10 searches the area database 60 for the current area. If the current area is not found (No in step S804), CPU 10 registers the current area in area database 60 (step S806). Specifically, a unique identification code is assigned to the current area, and the identification code is recorded as an area index of the area database 60. Also, two diagonal coordinates of the current area are recorded as area definition data in the area database 60. At the time of area registration, the adjacent area list and area passing information are blank.

  When registration of the current area (step S806) is completed or the current area is found in the area database 60 (No in step S804), the CPU 10 sets the current area as a start area (step S808). Specifically, a code indicating the start area (“s” in FIG. 4) is recorded in the “Previous Area” item Ap in the area passing information of the area database 60. Since the current area is the starting point of the movement path of the audio playback device 100, there is no area before the current area in the movement path. This start area code is stored in the “Previous Area” item Ap to indicate this fact.

  When the setting of the start area is completed, the CPU 10 waits for designation of the reproduction mode (step S810). A message prompting the user to specify a playback mode is displayed on the display device 24. When the playback mode is designated by operating the input device 22 (Yes in step S810), the initialization process is completed.

Refer to FIG. 7 again. When the playback mode is specified and the initialization process is completed, the CPU 10 determines what the specified playback mode is (step S704). When the designated reproduction mode is the route selection mode, the CPU 10 refers to the area database 60 and the music database 70 and selects and reproduces music data according to the movement route of the audio reproduction device 100 (step S706). On the other hand, when the designated reproduction mode is the user selection mode, the CPU 10 reproduces the song data selected by the user (step S708).
Hereinafter, the music data reproduction process (step S706) in the route selection mode will be described in detail with reference to FIG. 9 and FIG. First, the CPU 10 measures the current position of the audio reproduction device 100 and specifies the area where the device 100 is located (step S902). This process is performed in the same manner as in step S802 described above.

  Next, the CPU 10 creates a list of song data to be played back (hereinafter referred to as “playback song list”) on the RAM 12 in accordance with the music database 70 associated with the identified current area (step S904). . FIG. 14 shows a reproduction song list 75 created by sorting the music database 70 shown in FIG. The CPU 10 reads the music database 70 associated with the current area from the built-in memory 14a into the RAM 12, and sorts each row of the music database 70, that is, the reproduction history data 72 in descending order of reproduction frequency. When there are a plurality of reproduction history data 72 having the same reproduction frequency, the CPU 10 sorts the reproduction history data 72 in the order of the latest reproduction date and time. The music database 70 thus sorted is stored in the RAM 12 as a reproduction music list 75 and used in the subsequent processing.

  The CPU 10 selects music data to be reproduced from the reproduction music list 75 (step S906), and determines whether or not the music data can be reproduced (step S908). In step S906, songs are selected in order from the beginning of the playback song list 75. The CPU 10 first selects the reproduction history data 72 at the head of the reproduction music list 75 and searches for music data from the location indicated by the source information in the reproduction history data 72. If reproducible song data is not found (No in step S908), the CPU 10 selects the second song data from the top of the playback song list and determines again whether or not the song data can be played back. In this way, the CPU 10 searches for reproducible music data in order from the top of the playback music list.

  When CPU 10 finds reproducible music data (Yes in step S908), CPU 10 plays back the music data (step S910). The CPU 10 acquires song data from the location indicated by the source information, and transfers the song data to the audio processing unit 16. The audio processing unit 16 converts the song data into an audio signal. The audio signal is sent to the audio output device 17 connected to the audio processing unit 16, and the audio output device 17 emits sound according to the audio signal. In this way, the song data is reproduced as actual sound.

  After starting the reproduction of the song data, the CPU 10 updates the music database 70 in the current area (step S912). In this step, the reproduction frequency is incremented by 1 in the reproduction history data 72 including the index of the music data being reproduced, and the last reproduction date and time is rewritten to the current date and time.

  Thereafter, as shown in FIG. 10, the CPU 10 refers to the area database 60 associated with the current area, predicts the area where the audio reproduction device 100 will enter next, according to the area passing information, A song to be played is reserved (step S1002). As will be described later, when moving from the current area to another area in the past and song data is played back in the destination area, the track data index, playback frequency, and final playback are displayed in the area passing information of the current area. The date and time are recorded together with the index of the area before and after the current area. In FIG. 4, only one data set 64 is included in the area passage information, but actually, a plurality of data sets 64 can be recorded according to the movement path of the apparatus 100 and the music data to be reproduced. In step S <b> 1002, the CPU 10 extracts the data set 64 including the index of the previous area from all the data sets 64 included in the area passing information of the current area, and further selects the highest reproduction frequency among the extracted data sets 64. Identify the data set 64 you have. When there are a plurality of data sets 64 having the highest reproduction frequency, the CPU 10 specifies the data set 64 having the last reproduction date and time closest to the present time. The CPU 10 selects the music data specified by the music index in the data set 64 thus specified as music data to be reproduced in the area through which the audio reproducing device 100 passes next, and stores the music index in the RAM 12. .

Below, step S1002 is further demonstrated based on a specific example. Figure 15 shows an example of the area passing information associated with the area 80 ₁ of the area database 60. This area passage information includes five data sets 64a to 64e. Audio playback apparatus 100 passes through the area 80 _0, it assumed to be located in the current, the area 80 _1. Therefore, the current area is Area 80 _1, before the area is an area 80 _0. In step S1002 CPU 10, the data sets 64a containing the index P0 before area 80 ₀ area passing information of the current area 80 _1, 64b, and 64c and to extract 64e, data sets 64a and 64e with even the highest regeneration frequency Identify. The CPU 10 compares the last reproduction dates and times of the data sets 64a and 64e, and selects the data set 64a having a newer last reproduction date and time. Thereafter, the CPU 10 stores the song index in the data set 64a in the RAM 12 as a reserved song identification code.

  After reserving the reproduction music data in the next area in this way, the CPU 10 confirms whether or not a reproduction program stop command has been received (step S1004). The stop command can be input through operation of the input device 22. Also, a stop command is given to the CPU 10 when the power of the audio playback device 100 is turned off. When confirming receipt of the stop command (Yes in step S1004), the CPU 10 ends the reproduction process of the database selected song (step S706). On the other hand, when the stop command has not been received (No in step S1004), the CPU 10 measures the current position of the device 100 and identifies the area where the device 100 is located (step S1006). This process is performed in the same manner as in step S802 described above.

  Next, the CPU 10 determines whether or not the area where the audio playback device 100 is located has been changed (step S1008). When the area specified in step S1006 is the same as the area specified in step S902, the area where the apparatus 100 is located is not changed (No in step S1008). In this case, the CPU 10 confirms whether or not the reproduction of the current song data has been completed (step S1014). If the reproduction of the song data has not ended (No in step S1014), the process returns to step S1004. When the reproduction of the music is completed (Yes in step S1014), the process returns to step S906 in FIG. 9 and the music data of the next rank is selected from the reproduction music list 75.

  On the other hand, if the area specified in step S1006 is different from the area specified in step S902, the area where the apparatus 100 is located is changed (Yes in step S1008). In this case, the CPU 10 updates the area database 60 (step S1010).

Hereinafter, the update process of the area database 60 will be described with reference to FIG. First, the CPU 10 determines whether or not the current area after the area change is already registered in the area database 60 (step S1102). If the current area is not registered in area database 60 (No in step S1102), CPU 10 registers the current area in area database 60 (step S1104). In this step, a new unique area index is assigned to the current area, and the diagonal coordinates of the current area are recorded as area definition data. For example, when the audio reproducing apparatus 100 has moved from the area 80 ₀ of FIG. 5 to the area 80 _1, the area 80 ₁ hits the current area, area 80 ₀ strikes before area. When the device 100 is to have passed the first time the area 80 ₀ and 80 _1, step S1104, for example, area database 60a shown in FIG. 16 is generated. Area history data 62a corresponding to the front area 80 ₀ In this area database 60a is registered in the initialization process described above (step S702). In step S1104, area history data 62b corresponding to the current area 80 ₁ is registered in the area database 60a. Specifically, the index P1 is assigned to the current area 80 _1, the coordinates of the diagonal of the current area 80 ₁ is recorded as the area definition data. The neighboring area list, index P0 before a move source area Area 80 ₀ is recorded. Also. Also "before area" item of the area passing information, the index P0 of before area 80 ₀ it is recorded. The other items of area passage information are blank.

When registration of the current area (step S1104) is completed or the current area is already registered in the area database 60 (No in step S1102), the CPU 10 updates the adjacent area list and area passage information of the previous area ( Step S1106). Specifically, the index of the current area is recorded in the “next area” item of the adjacent area list of the previous area and the area passing information. Further, the index of the currently reproduced music data is recorded in the area passage information, the reproduction frequency is incremented by 1, and the last reproduction date / time is rewritten to the current date / time. For example, when updating the area database 60a in FIG. 16, an index P1 of the current area 80 _1, respectively, in "Next Area" item of the adjacent area list and area passing information before area 80 ₀ as shown in FIG. 17 records Is done. Also, the index “M2”, the reproduction frequency “1”, and the last reproduction date “030818” of the music data being reproduced are recorded in the area passing information.

  Thereafter, the CPU 10 refers to the “previous area” and “next area” items included in the area passing information of the previous area, and whether or not the areas identified by the indexes recorded in these items are adjacent to each other. Is determined (step S1108). When the “previous area” and the “next area” in the area passing information of the previous area are adjacent to each other (Yes in step S1108), the CPU 10 reflects the fact in the area database 60 and the “previous area” and The adjacent area list of “next area” is updated (step S1110). That is, the index of “next area” is recorded in the adjacent area list of “previous area”, and the index of “previous area” is recorded in the adjacent area list of “next area”.

For example, the audio reproducing apparatus 100 is sequentially passed through the area ₈₀ 0-80 _3, a case is assumed to be located in the current area 80 _4. In this case, the area 80 ₄ hits the current area, the area 80 ₃ hits the front area. At the time of step S1108, for example, the area database 60b shown in FIG. 18 is obtained. In step S1108, "front area" and in the previous area passing information area 80 ₃ "Next Area" is referred to. As shown in FIG. 18, "front area" is an area 80 ₂ with index P2, "Next Area" is an area 80 ₄ with index P4. As shown in FIG. 5, these areas 80 ₂ and 80 ₄ are adjacent. Accordingly, in step S1110, as shown in FIG. 19, the area 80 ₄ is recorded in the adjacent area list area _802, area ₈₀₂ is recorded in the adjacent area list area 80 _4.

  When it is determined that the “previous area” and the “next area” are not adjacent (No in step S1108) or the update of the adjacent area list (step S1110) is completed, the update of the area database 60 (step S1010) ends. To do.

  Refer to FIG. 10 again. After updating the area database 60, the CPU 10 updates the reproduction music list 75 so that the music data reserved in step S1002 is reproduced next (step S1012). Specifically, the reproduction history data 72 including the index of the music data reserved in step S1002 is arranged at the head of the reproduction music list 75. The reproduction history data 72 is acquired from, for example, the music database 70 associated with the movement source area (“previous area”). However, only the song index and source information are actually used in the reproduction history data 72 in the reproduction song list 75, and the reproduction frequency and the last reproduction date / time are merely recorded for convenience. Therefore, for example, when the song data is reserved in step S1002, the song index and source information may be acquired from the appropriate music database 70, and the playback song list 75 may be updated using them. In this case, the reproduction frequency and the last reproduction date / time may be blank. The second and subsequent rows of the reproduction music list 75 are determined by the same sort processing as step S904 according to the music database 70 associated with the current area. That is, the CPU 10 sorts the reproduction history data 72 included in the music database in the current area in the order of reproduction frequency, and arranges it in the second and subsequent rows of the reproduction song list 75. When there are a plurality of reproduction history data 72 having the same reproduction frequency, the reproduction history data 72 is sorted in the order of the latest reproduction date and time. Note that the playback history data 72 corresponding to the song data reserved in step S1002 is not subject to this sort process. That is, the second and subsequent lines of the reproduction music list 75 are determined by sorting the reproduction history data 72 excluding the reproduction history data 72 of the reserved music data in the music database 70 in the current area.

  After the reproduction music list 75 is updated, the CPU 10 checks whether or not the reproduction of the current music data has been completed (step S1014). If the reproduction of the song data has not ended (No in step S1014), the process returns to step S1004. When the reproduction of the song data is completed (Yes in step S1014), the process returns to step S906, and the song to be reproduced is selected from the head of the reproduction song list. Therefore, if the song data reserved in step S1002 exists at the location indicated by the source information, the reserved song data is reproduced.

  Next, the reproduction process (step S708) of the song data selected by the user will be described in detail with reference to FIG. The CPU 10 creates a reproduction song list on the RAM 12 in accordance with the designation of song data through the operation of the input device 22 (step S1202). The CPU 10 acquires the source information of the song data in response to the designation of the song data. The acquired source information is arranged in the reproduction song list. The CPU 10 selects source information in order from the beginning of the reproduction music list (step S1204), and determines whether or not music data corresponding to the source information can be reproduced (step S1206). First, the CPU 10 searches for music data from the location indicated by the source information at the head of the reproduction music list. If reproducible song data is not found (No in step S1206), the CPU 10 selects the second source information in the reproduction song list and determines again whether or not the song data corresponding to the source information can be reproduced. . In this way, music data that can be reproduced in order from the beginning of the reproduction music list is searched.

  When CPU 10 finds reproducible music data (Yes in step S1206), CPU 10 plays back the music data (step S1208). Thereafter, the CPU 10 measures the current position of the audio reproduction device 100 and specifies the area where the device 100 is located (step S1210). This process is performed in the same manner as in step S802 described above. Subsequently, the CPU 10 updates the music database 70 in the current area specified in step S1210 (step S1212). In this step, the reproduction frequency is incremented by 1 in the reproduction history data 72 corresponding to the music data being reproduced, and the final reproduction date is rewritten to the current date. If there is no reproduction history data 72 corresponding to the music data being reproduced, the reproduction history data 72 is newly registered in the music database 70.

  Thereafter, the CPU 10 confirms whether or not a reproduction program stop command has been received (step S1214). When confirming receipt of the stop command (Yes in step S1214), the CPU 10 ends the reproduction process of the user-selected song (step S706). On the other hand, if a stop command has not been received (No in step S1214), CPU 10 measures the current position of device 100 and identifies the area where device 100 is located (step S). This process is performed in the same manner as in step S802 described above.

  Next, the CPU 10 determines whether or not the area where the audio playback device 100 is located has been changed (step S1218). If the area identified in step S1216 is the same as the area determined in step S1210 (No in step S1218), CPU 10 checks whether or not the reproduction of the song data has been completed (step S1220). If the reproduction of the song data has not ended (No in step S1220), the process returns to step S1214. When the reproduction of the song data is completed (Yes in step S1220), the process returns to step S1204, and the song data to be reproduced next is searched according to the source information of the next rank in the reproduction song list.

  On the other hand, when the area identified in step S1216 is different from the area identified in step S1210 (Yes in step S1218), CPU 10 updates area database 60 (step S1222). This update process is performed in the same manner as step S1010 (see FIG. 11) described above.

  Refer to FIG. 3 again. When the reproduction of the database selected song (step S706) or the reproduction of the user selected song (step S708) ends, the CPU 10 executes an end process (step S710). FIG. 13 is a flowchart showing end processing. In this process, the CPU 10 first stops the reproduction of the song data (step S1302). Next, the CPU 10 sets the current area where the audio reproduction device 100 is located as an end area (step S1304). Specifically, a code (“e” in FIG. 4) indicating the end area is recorded in the “next area” item An of the area passing information of the area history data 62 including the index of the current area in the area database 60. Since the current area is the end point of the movement route, there is no area after the current area in the movement route. This end area code is stored in the “Next Area” item An to indicate this fact. When the setting of the end area is completed, the termination process is terminated, and the voice reproduction program of the present embodiment is terminated accordingly.

  Below, the advantage of this embodiment is demonstrated. The audio playback device 100 selects music data that has been played back frequently when moving from the current area to another area in the past, and plays back the music data after moving from the current area to another area. Thereby, the past reproduction history of the music data according to the movement path of the apparatus 100 can be reproduced with a certain probability. The movement path is identified by the identification codes of the previous area and the current area, and music data is not selected from the data set 64 having a previous area different from the current movement path. Therefore, the past reproduction history can be reproduced with a sufficiently high probability. Also, the music data to be played after the area change is selected without specifying the destination area. Thereby, the processing burden of the apparatus 100 is reduced. This is important for realizing a good processing speed in the portable audio playback device 100. Furthermore, since the song data to be played after the area change is reserved before the area change, the song data to be played can be switched quickly and smoothly after the area change.

  The area history data 62 is automatically updated without requiring user operation in accordance with the movement of the audio playback device 100 between areas. Therefore, the audio reproduction device 100 can reproduce the past reproduction history of the song data without increasing the work burden on the user.

  When there are a plurality of data sets 64 including the highest reproduction frequency, the audio reproduction device 100 selects a data set including the last reproduction date and time closest to the current date and time, and reserves song data according to the data set. In this case, music data that matches the user's recent preferences is preferentially reproduced, so that user satisfaction can be increased.

  After the reserved song data, the audio reproducing device 100 preferentially reproduces songs having a high reproduction frequency in the current area. For this reason, even when the reserved song data does not meet the user's preference, the song data that matches the user's preference corresponding to the area is reproduced with a high probability. Thereby, user satisfaction can be ensured.

  Since the areas 80 are congruent squares arranged alternately, one area 80 is surrounded by the other six areas 80. For this reason, the number of areas surrounding one area can be reduced as compared with the aligned rectangular areas. Accordingly, the number of data sets in the area database is reduced. Therefore, the size of the area database 60 and the storage capacity of the built-in memory 14a necessary for storing the area database 60 can be suppressed.

  Each area 80 is defined by two diagonal coordinates. In this case, since the map data of each area 80 is unnecessary, the storage capacity of the built-in memory 14a necessary for storing the area definition data can be suppressed.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. The present invention can be variously modified without departing from the gist thereof.

  In the above embodiment, the audio playback device 100 that can be carried by the user has been described. However, the audio reproducing device of the present invention may be any other moving body, for example, an in-vehicle audio system.

  In the above embodiment, the song index is used as the identification code of the audio data, and the source information is handled separately from the song index. However, it is also possible to use the source information as an identification code for audio data.

  In the above embodiment, the audio reproduction program 50 is stored in the built-in memory 14a. This audio reproduction program may be read from the external memory 15 or may be read from an external network through the communication interface 20.

It is the schematic which shows an audio | voice reproduction apparatus. It is a block diagram which shows the structure of the audio | voice reproduction apparatus shown by FIG. It is a figure which shows the memory content of a built-in memory. It is a figure which shows an area database. It is a figure which shows the area defined in embodiment. It is a figure which shows a music database. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a flowchart which shows the audio | voice reproduction | regeneration processing of embodiment. It is a figure which shows an example of a reproduction list. It is a figure which shows an example of area passage information. It is a figure which shows the update of an area database. It is a figure which shows the update of an area database. It is a figure which shows the update of an area database. It is a figure which shows the update of an area database.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... CPU, 12 ... RAM, 14 ... Storage part, 14a ... Built-in memory, 14b ... Reading device, 15 ... External memory, 16 ... Audio processing part, 18 ... Measurement part, 18a ... GPS receiver 18a, 20 ... Communication Interface, 22 ... Input device, 24 ... Display device, 30 ... Bus, 40 ... GPS satellite, 42 ... GPS signal, 60 ... Area database, 62 ... Area history data, 64 ... Data set, 70 ... Music database, 72 ... Playback History data, 80 ... area.

Claims (12)

An audio reproduction device for reproducing audio data,
A position measuring device for measuring the position of the sound reproducing device;
A first storage device that stores an area database that records one or more data sets in association with each of the areas into which the audio reproduction device has entered among a plurality of predetermined two-dimensional areas;
A control device for controlling the operation of the sound reproduction device,
Each of the data sets includes an identification code of the previous area and the next area located before and after the one area on the movement path of the sound reproduction device, and the sound reproduction device has moved from the one area to the next area. Including the identification code and playback frequency of the audio data that was sometimes played,
The control device includes:
Identifying the area where the audio playback device is located according to the position measured by the position measuring device;
Including the identification code of the area that the audio playback device has passed immediately before reaching the identified area from the data set associated with the identified area as the identification code of the previous area; and Selecting the dataset containing the highest playback frequency;
Detecting movement between the areas of the audio reproduction device according to the position measured by the position measuring device;
Executing a step of acquiring and reproducing the audio data according to an identification code of the audio data included in the selected data set when movement between the areas of the audio reproduction device is detected. Playback device. The control device includes:
When movement between the areas is detected, an identification code of the destination area is included as an identification code of the next area from the data set associated with the movement source area, and between the areas. Searching the data set including the identification code of the audio data being played when movement was detected;
When the data set is found, the reproduction frequency in the found data set is incremented by 1. When the data set is not found, the destination area identification code is used as the next area identification code. The data set including the identification code of the audio data that was reproduced when movement between the areas was detected and further including 1 as the reproduction frequency is registered in the area database in association with the movement source area. And performing further steps,
The sound reproducing device according to claim 1. The data set further includes the last reproduction date and time of the audio data that was being reproduced when the audio reproduction device moved from the one area to the next area,
The step of selecting the data set including the highest reproduction frequency includes determining a last reproduction date and time closest to the current date and time from the plurality of data sets when there are a plurality of data sets including the highest reproduction frequency. The audio reproduction device according to claim 1 or 2, wherein a data set to be included is selected. The audio reproduction device according to any one of claims 1 to 3, further comprising a second storage device that stores an audio database associated with each of the areas into which the audio reproduction device has entered.
In the audio database, one or more reproduction history data is recorded,
Each of the reproduction history data includes an identification code and reproduction frequency of audio data reproduced in the area associated with the audio database,
The control device includes:
After the step of acquiring and reproducing the audio data, sorting the reproduction history data in the audio database associated with the area where the audio reproduction device is currently located, in descending order of reproduction frequency;
Acquiring and playing back audio data corresponding to an identification code included in the playback history data in order from the beginning of the sorted playback history data;
The audio reproduction device according to claim 1. The audio reproduction device according to any one of claims 1 to 4, further comprising a third storage device.
The plurality of two-dimensional areas are congruent rectangles arranged alternately,
The third storage device stores two diagonal coordinates of each area in association with each area,
The step of specifying the area where the audio reproduction device is located specifies the area where the audio reproduction device is located according to the position measured by the position measuring device and the two coordinates of the diagonal.
The sound reproducing device according to claim 1. An audio reproduction program for controlling an audio reproduction device to reproduce audio data,
The audio reproduction device records one or more data sets in association with a position measuring device that measures the position of the audio reproduction device and each of the areas where the audio reproduction device has entered among a plurality of predetermined two-dimensional areas. A first storage device for storing an area database to be
Each of the data sets includes an identification code of the previous area and the next area located before and after the one area on the movement path of the sound reproduction device, and the sound reproduction device has moved from the one area to the next area. Including the identification code and playback frequency of the audio data that was sometimes played,
Identifying the area where the audio playback device is located according to the position measured by the position measuring device;
Including the identification code of the area that the audio playback device has passed immediately before reaching the identified area from the data set associated with the identified area as the identification code of the previous area; and Selecting the dataset containing the highest playback frequency;
Detecting movement between the areas of the audio reproduction device according to the position measured by the position measuring device;
Acquiring and reproducing the audio data in accordance with an identification code of the audio data included in the selected data set when movement between the areas of the audio reproduction device is detected; Voice playback program to be executed. When movement between the areas is detected, an identification code of the destination area is included as an identification code of the next area from the data set associated with the movement source area, and between the areas. Searching the data set including the identification code of the audio data being played when movement was detected;
When the data set is found, the reproduction frequency in the found data set is incremented by 1. When the data set is not found, the destination area identification code is used as the next area identification code. The data set including the identification code of the audio data that was reproduced when movement between the areas was detected and further including 1 as the reproduction frequency is registered in the area database in association with the movement source area. The audio reproduction program according to claim 6, further causing the audio reproduction device to execute a step of performing the operation. The data set further includes the last reproduction date and time of the audio data that was being reproduced when the audio reproduction device moved from the one area to the next area,
The step of selecting the data set including the highest reproduction frequency includes determining a last reproduction date and time closest to the current date and time from the plurality of data sets when there are a plurality of data sets including the highest reproduction frequency. Select the dataset to contain,
The audio reproduction program according to claim 6 or 7. The audio reproduction device further includes a second storage device that stores an audio database associated with each of the areas into which the audio reproduction device has entered,
In the audio database, one or more reproduction history data is recorded,
Each of the reproduction history data includes an identification code and reproduction frequency of audio data reproduced in the area associated with the audio database,
After the step of acquiring and reproducing the audio data, sorting the reproduction history data in the audio database associated with the area where the audio reproduction device is currently located, in descending order of reproduction frequency;
9. The audio reproduction device according to claim 6, further causing the audio reproduction device to further execute a step of acquiring and reproducing audio data corresponding to an identification code included in the reproduction history data in order from the top of the sorted reproduction history data. The audio playback program described in 1. The plurality of two-dimensional areas are congruent rectangles arranged alternately,
The audio reproduction device further includes a third storage device that stores two diagonal coordinates of each area in association with each area,
The step of specifying the area where the audio reproduction device is located specifies the area where the audio reproduction device is located according to the position measured by the position measuring device and the two coordinates of the diagonal.
The sound reproduction program according to any one of claims 6 to 9.   The computer-readable recording medium which recorded the audio | voice reproduction | regeneration program in any one of Claims 6-10. A method of playing back audio data by controlling an audio playback device,
The audio reproduction device records a position measuring device for measuring the position of the audio reproduction device and one or more data sets in association with each of the areas where the audio reproduction device has entered among a plurality of predetermined two-dimensional areas. A first storage device for storing an area database to be
Each of the data sets includes an identification code of the previous area and the next area located before and after the one area on the movement path of the sound reproduction device, and the sound reproduction device has moved from the one area to the next area. Including the identification code and playback frequency of the audio data that was sometimes played,
Identifying the area where the audio playback device is located according to the position measured by the position measuring device;
Including the identification code of the area that the audio playback device has passed immediately before reaching the identified area from the data set associated with the identified area as the identification code of the previous area; and Selecting the dataset containing the highest playback frequency;
Detecting movement between the areas of the audio reproduction device according to the position measured by the position measuring device;
Acquiring and reproducing the audio data in accordance with an identification code of the audio data included in the selected data set when movement between the areas of the audio reproduction device is detected; Audio playback method to be executed.

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