JP3871691B2 - Playback device - Google Patents

Description

The present invention relates to a playback apparatus, and more particularly to a playback apparatus that plays back a song recorded on a recording medium such as a compact disc.

Various types of audio equipment are installed in automobiles, and it is common to drive while listening to music. As music recording media, compact discs (hereinafter referred to as “CD”) and minidiscs (hereinafter referred to as “MD”) are widespread, and these playback devices are also mounted in automobiles. In order to reduce the troublesomeness of CD replacement, a playback apparatus having an autochanger function that can simultaneously set ten or more CDs and automatically replace the CD to be played back is also included in the CD playback apparatus mounted on an automobile. is there.

In addition, the automobile is small in size with map data recorded on a CD-ROM or digital video disc (hereinafter referred to as “DVD”) and the current position of the automobile calculated using a GPS (Global Positioning System) signal. Car navigation devices that display on a liquid crystal panel and guide the route to the destination to the driver are also being installed.

Furthermore, a car navigation device equipped with a hard disk drive which is a recording device for a computer is also used. This car navigation device is also equipped with CD playback means. When music playback is started, the music being played is automatically compressed by a predetermined digital data compression technique and recorded on the hard disk to create a music library. can do. At this time, information corresponding to a song to be recorded on the hard disk is acquired from information on a commercially available CD (album name, artist name, song name, etc.) recorded in advance on the hard disk, and recorded on the hard disk in correspondence with the acoustic data. . Furthermore, for music for which no information is recorded on the hard disk, a mobile phone is used to access a database of a predetermined server connected to the Internet to obtain necessary information.

These additional information is used when the user selects a desired song from a plurality of music recorded on the hard disk. For example, it is classified by artist or genre and displayed on a small liquid crystal panel to facilitate the user's music selection.

On the other hand, in the following Patent Documents 1 to 3 and the like, keywords are determined when predetermined additional information is determined in advance for each song, recorded on a recording medium such as a CD in association with the information, and a song to be played back is selected. A technique for determining a music piece by searching for additional information by designating an ID is disclosed. Additional information includes words representing the atmosphere of the song, names of people, place names, seasons, events / events, and ages. CDs, MDs, DVDs, etc. each have a standardized data recording format, and an area that can be freely used by the producer is provided, and additional information can be recorded in that area. For example, in the case of a CD, a TOC (Tabl) that records time information and the like.
It is possible to record additional information in some areas of e of Contents). Further, the additional information can be recorded in another recording device such as a semiconductor memory without being recorded in the recording medium on which the acoustic data is recorded.

In general, information other than sound data is recorded on a CD, and a media catalog number (hereinafter referred to as “MCN”) consisting of a 13-digit number for uniquely identifying the CD is recorded in the TOC portion. Track number, time information, etc. are recorded. Of the digital data read from the CD, the acoustic data is decoded and then converted to an analog signal and reproduced as sound. On the other hand, the track number of the TOC information is converted into characters and displayed on the liquid crystal panel.

By the way, since the impression that the user has about the music piece is not necessarily the same, as described above, in the search using information fixedly added in advance for each piece of music, the music piece that always matches the user's preference May not be selected.

Also, the song that the user wants to listen to is not always the same, and depends on the surrounding environment when listening and the purpose of use of the car, but if the user's favorite song is being played, the song can be skipped during playback. Are often performed to the end without much operation.
Therefore, there is a possibility that the playback status of such a song can be used as a measure that the user wants to listen to the song. Conventionally, such a playback status of such a song is used to select a song. There was no function.
Japanese Patent Laid-Open No. 1-217783 JP-A-6-110478 JP-A-9-146572

Means for solving the problems and their effects

The present invention has been made in view of the above problems, and an object of the present invention is to provide a playback apparatus that can automatically select a song that matches a user's preference according to the playback status of the song.

The reproducing apparatus ( 1 ) according to the present invention records the acoustic data of each song read from the recording medium as a file with a file name that does not overlap, and records a plurality of pieces of data recorded in the recording unit. Is a playback device that selects and plays back a song, and determines whether the song has been played to the end and whether the song playback has been interrupted halfway, and based on the determination result by the judgment unit Update the importance assigned to each keyword associated with the file name of the song.
And recording processing means for recording in the recording means Te, a keyword inputted via the input means,
Considering the importance given to the keyword recorded in the recording means, the file name of the song
And a music selection means for selecting .

According to the playback device ( 1 ) , given to each keyword associated with the file name of the song based on the judgment result when the song is played to the end and when the song playback is interrupted
It is the importance can continue to update, and the importance assigned to each of the keywords that can be used as a measure wishing to listen to music. Therefore, for each keyword
Importance given to it, by being used to select the file name of the song, can automatically select the favorite songs of the user corresponding to the keyword is the input and playback conditions.
In addition, by using the file name as information for specifying a song, the TOC
Without using the information as song identification information, each song file name and multiple {keywords
De, that Do is possible to correspond to a set of severity}. For example, multiple sold as a set
If all the CDNs have the same MCN, or there is a CD that does not have an MCN,
When the sound data of a large number of songs is recorded on the recording means, the song specifying information combined with the TOC information
In some cases, it is not possible to specify a song. On the other hand, by using the file name of each song as information for specifying a song, the song is specified by song specifying information combined with TOC information. However, it becomes possible to specify the music more accurately.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram showing an audio reproducing apparatus according to the first embodiment of the present invention. The sound reproducing apparatus 100 includes a central processing unit (hereinafter referred to as “CPU”) 101, a memory 102, a recording unit 103, an operation unit 104, a clock unit 105, a CD drive 106, and a digital processing unit 1.
07, a D / A converter 108, an amplifier 109, a bus 110, and an A / D converter 111. The A / D conversion unit 111 is connected to a detection unit 140 that detects temperature, humidity, and the like, and the amplifier 109 is connected to a speaker 120. The bus 110 is composed of a plurality of signal lines, and data exchange between the respective units in the audio reproduction device 100 and control of peripheral units by the CPU 101 are performed via the bus 110. When the power supply (not shown) of the audio playback device 100 is turned off, the data recorded in the memory 102 is erased, but the recording unit 10
The data recorded in No. 3 remains as it is, and can be used when the power of the sound reproducing apparatus is turned on next time.

Similar to the conventional CD playback device, the audio playback device 100 starts playback of music when a CD 130 on which music is recorded is set in the CD drive 106. For reproduction of music recorded on a CD, the CPU 101 uses a CD drive 106 and a digital processing unit 107.
This is done by controlling. The CD drive 106 rotates the CD 130 and transfers digital sound data to the digital processing unit 107 by an optical pickup (not shown). The digital processing unit 107 decodes the encoded digital data to generate stereo sound data having a predetermined number of bits, and transmits the stereo sound data to the D / A conversion unit 108. Stereo audio data is converted from a digital signal to an analog signal by the D / A conversion unit 108, amplified by the amplifier 109, and then transmitted to the speaker 120 to be reproduced as sound.

The operation unit 104 receives a user operation and transmits a signal for controlling the reproduction of the CD 130 to the CPU 101. The CPU 101 receives a signal from the operation unit 104 and performs control such as fast-forwarding the song being reproduced, returning to the original, skipping, and stopping reproduction.

The sound reproduction apparatus 100 is characterized in that the CPU 101 automatically determines a predetermined keyword in accordance with signals from the timing means 105, the detection unit 140, and the operation unit 104, and determines the determined keyword and the song being reproduced. In other words, the information to be identified is recorded in the recording unit 103 as a search table in association with the information to be specified. When determining the music to be played back, the time measuring means 105 and the detection unit 14
It is characterized in that a keyword is automatically determined according to a signal from 0, etc., the search cable of the recording unit 103 is searched using this keyword, and a matching song is reproduced.

FIG. 2 is a flowchart showing processing performed by the CPU 101 in processing for automatically determining a keyword using a signal from the time measuring means 105. In the following description:
Assume that the CD 130 is set in the CD drive 106 and the TOC information is read from the CD 130 and recorded in the memory 102.

In step 201, it is repeatedly determined whether or not the song on the CD 130 is being played back. If it is determined that the song is being played back, the process proceeds to step 202.
In step 202, it is determined whether or not the TOC information recorded in the memory 102 includes information (hereinafter referred to as “song identification information”) that identifies the currently reproduced song. If it is determined that there is song identification information corresponding to the song being played, the song identification information is acquired and the memory 102
If it is determined that there is no data, the process ends. For example, the MCN and the track number can be used as the song identification information. Since the MCN can identify the CD 130, and the track number indicates the order of the songs recorded on the CD 130, when the CD 130 is exchanged by using the MCN and the track number as a set The song can also be specified in.

In step 203, the current date and time is acquired from the time measuring means 105 and recorded in a predetermined area of the memory 102.
In step 204, the date information is acquired from the current date and time acquired in step 203, and the keywords matching the acquired date are acquired from the “candidate table” shown in FIG. In FIG. 3A, the date is used as an index, and words related to annual events, holidays, anniversaries, seasons, etc. are recorded as keywords. For example, if the current day is July 7, two keywords “Tanabata” and “Summer” are determined.

In step 205, as in step 204, the time information is acquired from the current date and time acquired in step 203, and keywords corresponding to the time zone including the acquired time are displayed in the candidate table shown in FIG. 3B. Get from. In FIG. 3B, a time zone is used as an index.
For example, if the current time is 19:50 on December 24, the keyword “Christmas Eve” is determined by the process of step 204, and the keyword “evening” is determined by the process of step 205.

In step 206, the music specifying information acquired in step 202 and step 2
The recording unit 1 associates the keywords determined by the processes 04 and 205 with the importance levels.
Recorded in 03 “search table”. An example of the search table is shown in FIG.

In FIG. 4A, a plurality of {keyword, importance} pairs are recorded in association with a set of {MCN, track number} which is music specifying information. For example, an integer value can be used as the importance level. In the case of newly recording, “1” is recorded as the importance. Also, if the same song identification information is already recorded, the keyword and the importance (
= 1) Only additional records are made. Further, when the same music specifying information and the same keyword are recorded, the importance of the corresponding keyword is increased by 1.

In step 207, it is determined whether or not playback of the next song has been started. If it is determined that playback of the next song has started, the process proceeds to step 202, and then the processing in steps 202 to 206 is repeated. If it is determined that the same song is being reproduced, it is determined whether or not a signal from the operation unit 104 has been received. When it is determined that the signal from the operation unit 104 is a signal corresponding to the music skip operation, the process proceeds to step 209.

In step 209, the importance of the keyword recorded in step 206 is decreased by one.
In step 210, it is determined whether or not there is an instruction to end, and the process returns to step 207 until the end instruction is issued, and the above processing is repeated.

As a result, a search table in which the reproduced music identification information, keywords, and importance levels are recorded in association with each other is generated. The importance of the search table increases as the number of times the same song is played back increases. When playback is skipped by the user's intention, the importance is reduced by that number. It can be used as a measure that the user wants to listen to each song.

Of the keywords in the candidate table shown in FIG. 3A, “Graduation” on March 12, April 5
“Admission” of the day, “Marriage” on April 17, “Birthday” on June 20, etc. are data set by the user, and other data are set in advance. For example, the user can register an arbitrary keyword by operating an operation button (not shown) such as a numeric keypad of the operation unit 104 to designate an arbitrary month and date.

FIG. 5 shows a process for determining a keyword according to the traveling speed of the car, similar to FIG.
It is the flowchart which showed the process which CPU101 performs.

In step 501, as an initial setting, a predetermined value is set to the time interval Δt for detecting the traveling speed, 0 is set to the loop counter n, and the current time is set to T0.
In step 502, the current time is acquired from the time measuring means 105, and compared with T0, Δt
It is determined whether or not the time elapses. If it is determined that the time elapses, the process proceeds to step 503.

In step 503, the signal from the detection unit 140 is received via the A / D conversion unit 111 to acquire the traveling speed, and the acquired speed is recorded in the memory 102 as the value of the variable V (n). Add 1 to n.

In step 504, the time variation of V (n) recorded in the memory 102 is evaluated.
As will be described later, speed data V (n) (n = 1 to N, where N is the maximum number of speed data to be recorded) in a predetermined time range is recorded in the memory 102 by repeating the processing of steps 502 to 510. It will be. In order to evaluate the time variation of V (n), for example, V (
The fluctuation range obtained by subtracting the minimum value from the maximum value of n) and the average value of V (n) are calculated.

In step 505, it is determined whether or not the fluctuation range calculated in step 504 is within a predetermined range. When it is determined that it is within the predetermined range, the process proceeds to step 506, and when it is determined that it is not within the predetermined range, the process proceeds to step 507.

In step 506, the average value calculated in step 504 is used to refer to the candidate table and determine the corresponding keyword. FIG. 3C shows an example of the candidate table. When (c) of FIG. 3 is used, when the average speed is 0 to 5 km, the keyword “
If it is “congested”, 5 to 20 km, “slow” is set. If it is 60 km or more, the keyword “fast” is set. In other cases (0 to 60 km), no keyword is set. Further, similar to the processing in step 206 (FIG. 2) described above, the music specifying information being reproduced, the determined keyword, and the importance are associated with each other and recorded in the search table of the recording unit 103. The processing in the case where the same song specifying information and the same keyword are already recorded in the search table is the same as that in step 206 (FIG. 2).

In step 507, the current time is acquired from the time measuring means 105 and set to T0.
In step 508, it is determined whether or not the number n of recording speeds detected by the counter n is exceeded. If it is determined that the speed is exceeded, an initial value of 0 is set in the counter n in step 509.

In step 510, it is determined whether or not there is an instruction to end, and the process returns to step 502 until the end instruction is issued, and the above processing is repeated. As a result of the above processing, a search table similar to (a) of FIG. 4 is generated. Similarly to steps 208 and 209 (FIG. 2), it is also possible to add a process of changing the importance when the music being reproduced is affected by the operation unit.

It is also possible to determine a keyword to be added to a song according to the environment such as the weather. For example, a temperature sensor and a humidity sensor are used for the detection unit 140, these sensors are installed in the automobile, and signals from these sensors are acquired as digital data via the A / D conversion unit 111 at predetermined time intervals. To do. Using the acquired data, discomfort index DI (%)
Can be calculated by, for example, Equation 1 and the corresponding keyword can be determined by referring to a candidate table prepared in advance using the result.
DI = 0.81T + 0.01U (0.99T-14.3) +46.3 (Equation 1)
Here, T is temperature (° C.) and U is humidity (%).

FIG. 3D is an example of a candidate table in which the discomfort index is associated with the keyword. It is also possible to use a combination of temperature and humidity values as indicators.

Furthermore, it is also possible to add a barometric pressure sensor to the temperature sensor and the humidity sensor, refer to a candidate table prepared in advance for the combination of these three types of sensors, and determine a corresponding keyword.

It is also possible to add the number of passengers to the song as a keyword. In that case,
A weight sensor is used for the detection unit 140, embedded in the seat, and the number of passengers detected by the weight sensor is recorded for the search table in association with the music identification information being reproduced. For example, it is possible to reflect information such as a song that is preferred to be listened to when the driver is riding alone and a song that is preferably listened to when the driver is present on the search table. Since the same song may be played when the number of passengers is different, a plurality of passengers can be registered.

It is also possible to allow the user to directly input a keyword for each song from the operation unit 104 or select from candidates. For example, the music specifying information is acquired from the TOC information read from the CD and recorded in the recording unit 103, displayed as a list on the display unit (not shown) as a character, and the user wishes to add a keyword After that, the keyword can be input as characters, input by voice, or selected from the keyword candidate list presented on the display unit.

It is also possible to determine a keyword to be added to the song according to the driver's condition such as drowsiness. For example, a CCD camera is used as the detection unit 140, the driver's face is photographed, digital image data is acquired via the A / D converter 111, and recorded in the memory 102 at predetermined time intervals. Image processing is performed on the recorded image data to detect the driver's eyes, and by analyzing the degree of opening and closing of the eyes, the time change pattern of opening and closing, etc., it is determined whether the driver is drowsy To do. If it is determined that the driver is drowsy, the driver may have been drowsy by the song being played, or the song being played may not have the effect of awakening the driver from the drowsy state Then, the music specifying information being reproduced and the keyword “sleepiness” are recorded in the search table of the recording unit 103 in association with each other.

It is also possible to generate a search table by combining the plurality of keyword determination processes described above. FIG. 4B is an example of a search table generated using the current date, current time, travel speed, surrounding environment, driver awakening state, and number of passengers.

In the above description, the case where one search table is recorded in the recording unit 103 has been described. However, it is also possible to divide and record a plurality of search tables. That is, after specifying a search table for recording a keyword from among a plurality of search tables to which identification information is added,
130 can be played back. In that case, the keyword determined by the above-described processing and the music identification information are recorded only in the designated search table.

It is also possible to employ a recording device (not shown) such as a removable semiconductor memory and record the search table in the recording device.

FIG. 6 is a block diagram showing an outline of an information providing apparatus according to the second embodiment of the present invention.
The information providing apparatus 600 includes a CPU 101, a memory 102, a recording unit 103, an operation unit 104,
Time measuring means 105, CD drive 106, digital processing unit 107, D / A conversion unit 108,
Amplifier 109, bus 110, speaker 120, CD 130, CD-ROM drive 60
1. Video memory (hereinafter referred to as “VRAM”) 602, video signal generator 603, GPS
A signal receiving unit 604 and a CD-ROM 610 are included. GPS signal receiver 60
4 is connected to the GPS antenna 620, and the video signal generation unit 603 is connected to the display unit 630.

The information providing apparatus 600 includes means for realizing a car navigation function instead of the A / D conversion unit 111 in the audio reproduction apparatus 100 shown in FIG. In FIG.
The same reference numerals are given to the same components as those in FIG.
The sound recorded on the CD is reproduced by performing the same function as.

A CD-ROM 610 on which map information and related information are recorded is a CD-ROM drive 601.
The CPU 101 reads out map information and related information information and displays them on the display unit 630. Reading map data recorded on the CD-ROM 610
This is performed by the CPU 101 controlling the CD-ROM drive 601. CD
-ROM drive 601 rotates CD-ROM 610 and optical pickup (not shown)
Thus, the digital map data is transferred to the memory 102. Next, two-dimensional map image data is generated from the map data recorded in the memory 102 and recorded in the VRAM 602.
The video signal generation unit 603 reads each pixel data of the map image data from the VRAM 602, converts it into an analog video signal, and transmits it to the display unit 630, whereby the map and related information are displayed.

In addition, the CPU 101 receives GPS signals including transmission times transmitted from a plurality of artificial satellites via the GPS antenna 620 and the GPS signal receiving unit 604 at predetermined time intervals, and communicates with the internal timing unit 105. The distance from each satellite is calculated from the time difference. The current vehicle position coordinates are calculated using the calculated distance and the satellite position information obtained from the satellite orbit calculation, and the current position is set at the corresponding position of the map image data on the VRAM 602. By writing predetermined graphic data to be displayed, a map in which a graphic representing the current position is superimposed on the display unit 630 is displayed.

The information providing apparatus 600 has a function of setting a destination by selecting one from a candidate list of places that are classified and recorded in advance, as in a normal car navigation apparatus. For example, the CPU 101 hierarchically displays the table 630 on the display unit 630 using a table previously recorded in the CD-ROM 610 and corresponding to the large classification, small classification, name, address, and position coordinates as shown in FIG. A candidate is displayed, and the destination is determined by the user selecting one of them. The CPU 101 records information on the determined destination in the recording unit 103, and displays a predetermined graphic representing the destination at a position on the map corresponding to the target position coordinates.

FIG. 8 is a flowchart of processing performed by the CPU 101 in processing for determining a keyword from a destination set by the information providing apparatus 600.

Hereinafter, processing for determining a keyword from a destination will be described based on the flowchart of FIG. It is assumed that a destination is set in advance and related information is recorded in the recording unit 103.

In steps 801 and 802, processing similar to that in steps 201 and 202 in FIG. 2 is performed.
In step 803, information regarding the currently set destination is acquired from the recording unit 103. For example, when the ABC ski resort is set as the destination from the candidates in FIG. 7, “ski resort” is acquired as small-class text data.

In step 804, it is determined whether or not the acquired text data is included in a preset candidate table. If it is determined that the acquired text data is included, the process proceeds to step 805 and is determined not to be included. If so, the process proceeds to step 806.

In step 805, the corresponding keyword is determined with reference to the candidate table.
For example, in the case of the candidate table shown in (e) of FIG. 3, “ski” is determined as a keyword. The determined keyword is recorded in the search table of the recording unit 103 in the same manner as in step 206 (FIG. 2), in correspondence with the music specifying information being played back and the importance.
Since the processing in steps 806 to 809 is the same as the processing in steps 207 to 210 in FIG. 2, the description thereof is omitted here.

With the above processing, a search table in which a keyword corresponding to the destination is recorded is generated for the music reproduced before reaching the destination.
It is also possible to determine a keyword according to the current position of the automobile. In this case, the map is divided into a plurality of blocks of a predetermined size in advance, a candidate table in which the block number assigned to each block is associated with the keyword is created and recorded in the recording unit 103.

The CPU 101 calculates the current position (for example, latitude and longitude) from the signal acquired via the GPS antenna 620 and the GPS signal receiving unit 604, determines the block number of the block including the current position, and refers to the candidate table Then, a keyword corresponding to the determined block number is acquired, and the acquired keyword is recorded in the search table in association with the music specifying information and the importance level being reproduced. Thus, for example, by using a candidate table in which the keyword “sea” is recorded in association with a plurality of blocks near the coast, when the position where the vehicle is running is located within the block near the coast, Song identification information to identify the song,
The keyword “sea” and the importance can be associated and recorded in the search table.

Next, processing for determining a song to be played using the search table in the audio playback device 100 (FIG. 1) according to the first embodiment of the present invention will be described. It is assumed that a search table (for example, FIG. 4B) is recorded in the recording unit 103.

FIG. 9 shows the CPU 1 in the process of automatically determining the music to be played using the keyword.
It is a flowchart which shows the process which 01 performs.

In step 901, as described above, after acquiring the current date, current time, travel speed, temperature, humidity, number of passengers, and driver's arousal information, keywords corresponding to each are determined.

In step 902, from the search table, the current date, current time, travel speed,
Song specific information (MCN and track number) that includes all of the keywords determined for each of temperature, humidity, and number of passengers and does not include the keyword “sleepiness” is acquired.

In step 903, the number (k) of the acquired music specifying information is determined, and the process branches according to the determination result. If k = 0, the process proceeds to step 905. If k = 1, the process proceeds to step 90.
7. If k ≧ 2, the process proceeds to step 906.

In step 904, after one keyword is reduced, the process proceeds to step 904.
Various processes are possible for this reduction process. For example, it is possible to arbitrarily reduce or specify the reduction order in advance in the keyword of the candidate table, and delete in the order corresponding to this.

In step 905, it is determined whether or not the keyword remains by the processing in step 904. If it is determined that the keyword does not remain, the process ends. If it is determined that the keyword remains, the process returns to step 902, and from the previous time. The search table is searched using the keyword whose number has decreased.

In step 906, one piece of music specifying information is selected from a plurality of pieces of music specifying information in consideration of importance. Various processes are possible for this selection process. For example, selecting song specifying information including the largest importance, comparing values obtained by adding all the importance corresponding to each song specifying information, and selecting song specifying information corresponding to the largest value, etc. Is possible. Also,
It is also possible to select the music specifying information in consideration of the priorities assigned to the keywords in advance. In this case, since the keyword used for the search corresponds to all of the selected song specifying information, the keyword that has not been used for the search among the keywords corresponding to the selected song specifying information. The priority order will be compared. In addition, character information (for example, MCN of a song, track number) corresponding to the selected song specifying information is displayed in a list on a display unit (not shown), and the user selects from the list to specify the song. It is also possible for information to be determined.

In step 907, playback of the music recorded on the CD 130 corresponding to the determined music specifying information is started.
The processing in steps 908 to 911 is the same as the processing in steps 207 to 210 in FIG. That is, when the operation unit is operated and an operation such as skip or fast forward is performed on the music being reproduced, the importance of the music specifying information corresponding to the music being reproduced in the search table is decreased by one.

As described above, using the keyword automatically determined according to the current situation, the song to be played is automatically determined and played.

Similarly, in the information providing apparatus 600 (FIG. 6) according to the second embodiment of the present invention, it is possible to automatically determine a song to be played using a keyword.
That is, as described above, the keyword is automatically determined using the set destination, the current position, etc., and the song specifying information corresponding to the keyword is acquired by referring to the search table. The song to be played can be determined.

In the above description, it has been explained that a set of {MCN, track number} can be used as an example of the music identification information. However, a plurality of CDs may be sold as one set, and in this case, the MCNs of the plurality of CDs may be sold. All may be the same. In that case, since the song cannot be specified by the set of {MCN, track number}, the start time of each song in the TOC,
Information such as performance time is used for song identification information. For example, a set of {MCN, track number, start time} or {MCN, track number, performance time} can be used as the music specifying information.

Further, in the first embodiment shown in FIG. 1, the CD drive 106 uses a drive whose data reading speed is faster than the sound reproduction speed, the recording unit 103 uses a large-capacity hard disk, and the digital processing unit 107 is provided with a buffer having a capacity larger than that required for normal sound reproduction, and the sound data in the data (acoustic data and TOC data) read out from the CD at a high speed is suitable for sound reproduction. Sound data and TOC data can be recorded in the recording unit 103 while being read from the buffer and reproduced. In the audio reproducing apparatus having this configuration, it is also possible to perform processing for automatically determining the keyword described above. In this case, the acoustic data of each song is recorded in the recording unit 103 as a file with a unique file name, and the TOC information is used as song specifying information by using this file name as song specifying information. Without doing so, it is possible to directly correspond each song to the determined keyword. As described above, if the MCNs of a plurality of CDs sold as one set are all the same, or there are CDs that do not have an MCN, TO
The song identification information combined with the C information may not be able to identify the song, but by using the file name of each song recorded in the recording unit 103 as the song identification information, the song can be accurately identified. It becomes possible to specify.

Also, the audio playback device 100 shown in FIG. 1 can be configured with a serial interface for connecting to a mobile phone. In that case, by connecting a mobile phone, you can download additional information about the song (title, song description, singer, songwriter, composer, release date, etc.) from a server connected to the Internet, The corresponding information is recorded in the recording unit 103, and the additional information is searched using the keyword automatically determined as described above. If there is a song that matches the keyword, the song can be reproduced. is there.

In this case, it is possible to acquire the corresponding keyword from the candidate table (for example, (a) of FIG. 3) using the release date of the song acquired from the server. In step 907 (FIG. 9) in the process of determining the music to be played, as a method of selecting one piece of music specifying information from a plurality of pieces of music specifying information, a list of titles, singers and the like corresponding to each piece of music specifying information is displayed. It is also possible to accept the user's selection.

In addition, when downloading desired song data from a server connected to the Internet via a mobile phone and recording it in the recording unit 103, using the recorded date and time, steps 203 to 206 in FIG. It is also possible to determine the keyword by performing the same process, and record it in the search table in association with the song specifying information for specifying the downloaded song.

In the above description, the case of using one CD has been described. However, it is also possible to use a drive having an autochanger capable of mounting a plurality of CDs. Although only CD and CD-ROM have been described, the present invention is not limited to these, and can be applied to DVD, MD, and other removable recording media.

It is a block diagram which shows schematic structure of the audio | voice reproduction apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process which determines a keyword using the present date. (A)-(e) is a table | surface which shows the example of the candidate table for determining a keyword. (A) And (b) is a table | surface which shows the example of the table for a search. It is a flowchart which shows the process which determines a keyword according to driving speed. It is a block diagram which shows schematic structure of the information provision apparatus which concerns on the 2nd Embodiment of this invention. It is a table | surface which shows the candidate of the destination for car navigation. It is a flowchart which shows the process which determines a keyword using a destination. It is a flowchart which shows the process which determines the music to reproduce | regenerate using a keyword.

Explanation of symbols

100 voice playback device 101 central processing unit (CPU)
102 Memory 103 Recording Unit 104 Operation Unit 105 Timekeeping Means 106 CD Drive 107 Digital Processing Unit 108 D / A Conversion Unit 109 Amplifier 110 Bus 111 A / D Conversion Unit 120 Speaker 130 CD
140 Detection Unit 600 Information Providing Device 601 CD-ROM Drive 602 Video Memory (VRAM)
603 Video signal generation unit 604 GPS signal reception unit 610 CD-ROM
620 GPS antenna 630 display unit

Claims (1)

A playback device for recording sound data of each song read from a recording medium on a recording means as a file with a unique file name, and selecting and playing a plurality of songs recorded on the recording means. And
A determination means for determining when the song has been played to the end and when the song has been interrupted,
Based on the determination result by the determination means, the keyword associated with the file name of the song
And recording processing means for recording in the recording means updates the importance assigned to each de,
It is attached to the keyword input via the input means and the keyword recorded in the recording means.
A reproducing apparatus comprising music selection means for selecting a file name of a song in consideration of a given importance .

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