JP3829513B2 - Playback device and playback method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a playback apparatus and a playback method capable of playing back audio data and the like managed in units of programs.
[0002]
[Prior art]
For example, digital audio systems capable of reproducing audio data such as music pieces are widely used, including audio devices compatible with CDs (Compact Discs) and so-called minidiscs.
In recent years, audio devices that store programs such as music using a solid-state memory such as an HDD (hard disk drive) or a flash memory built in a playback apparatus as recording media, read out music data from those HDDs or solid-state memory, and play them back. Has also been developed.
[0003]
In such an audio system, the audio data recorded on the recording medium is usually managed in units of programs for each piece of music, for example.
Therefore, for example, in the case of normal playback, audio data is sequentially played back in accordance with the program number order.
For example, the music piece with the program number “1” is played first, then the music piece with the program number “2” is played back, and so on up to the last program.
In general, a program as one piece of music is also called a “track”. Therefore, in the present specification, the above program is also called a track, and the program number is also called a track number.
[0004]
[Problems to be solved by the invention]
By the way, as already known, various playback apparatuses are provided with various playback methods in addition to playing back the music pieces recorded on the recording medium in the order of the track numbers.
For example, with regard to the order of the music to be played, there are known playback methods called shuffle playback, program playback, and one-track playback, in addition to the above-described normal playback (playback in track number order). Shuffle playback is a method in which a playback device sequentially selects a track number at random and performs playback. Therefore, in this case, the user has pleasure of not knowing the song to be played next.
Program playback is a method in which a user designates a song order (programs the song order) and plays it, and the user listens to a desired song from the songs recorded on the recording medium in the desired song order. Will be able to.
One-track playback is playback that ends the playback operation when playback of a certain track is completed.
[0005]
Furthermore, as a playback method for one track, there are repeat playback and intro playback in addition to normal playback in which the music is played once from the beginning to the end. Repeat playback is a system in which a track is repeatedly played back and forth. Intro playback is a system in which only the intro part of each track (for example, about several seconds from the start of a song) is played back.
[0006]
With these playback methods, the user can enjoy a variety of playback of music and the like recorded on the recording medium.
[0007]
However, any of these conventional playback methods is executed by the user specifying the playback method, and the playback expression performed by the playback device is limited to the expression form specified by the user.
Naturally, the music to be played is limited to the music recorded on the recording medium, so the diversity of the playback audio is limited.
[0008]
[Means for Solving the Problems]
Therefore, in view of such circumstances, the present invention has an object to provide a more interesting reproduction method for reproducing a program (track) from a recording medium. In particular, in order to improve the user's listening enjoyment, various expression forms not specified by the user are realized, and a program (for example, one piece of music data or one moving picture data) recorded on a recording medium is realized. This makes it possible to feel the diversity of the output sound even though it is within the range of.
[0009]
For this reason, as a playback device, Reading means capable of reading data from a recording medium storing data in units of programs and managing each program by assigning a program number corresponding to the reproduction order, and data read by the reading means On the other hand, the signal processing means capable of performing the required signal processing and outputting it as reproduced sound, and the data recorded on the recording medium, from the reproduction location mode in the program set in plural A reproduction control unit that randomly selects a reproduction point mode and causes the reading unit and the signal processing unit to perform a reproduction operation; .
As a playback mode, playback locations in the program are set at random. That is, a plurality of reproduction location modes in the program are set, and the control means randomly selects the reproduction location mode and causes the reading means to execute data reading. Specifically, when the data is music or the like, various playback location modes such as the whole, chorus, intro, and chorus are prepared and selected.
The reproduction mode is related to data signal processing. That is, a plurality of signal processing modes are set for the data read by the reading means, and the control means randomly selects the signal processing mode and performs signal processing by the signal processing means (audio signal processing when the data is audio data). Or video signal processing when the data is video data). As specific examples, various signal processing modes such as music tempo and pitch (tonality), acoustic processing such as reverb / echo / equalizing, and mixed reproduction are prepared and selected.
[0010]
By executing such a playback operation, it is possible to provide a variety of limited programs (music data, etc.) recorded on the recording medium and provide enjoyable playback sound that cannot be predicted by the user. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described. As an embodiment, a recording / reproducing apparatus capable of recording / reproducing at least a data file such as audio data corresponding to a predetermined medium (a disk-shaped recording medium or a solid-state memory device such as a flash memory) is used. In addition, the reproduction operation that is a feature of this example is referred to as super shuffle reproduction.
The description will be given in the following order.
1. Configuration of recording / playback device
2. Data contents recorded on media and reproduction mode examples
3. Super shuffle playback process
[0012]
1. Configuration of recording / playback device
The block diagram of FIG. 1 shows a configuration example as a recording / reproducing apparatus of the embodiment.
In the recording / reproducing apparatus 1 shown in this figure, a file storage unit 5 is provided. The file storage unit 5 is, for example, a disk driver, and adopts a configuration capable of reading and writing data to a predetermined disk-shaped recording medium (hereinafter simply referred to as a disk) (or only reading may be possible). It is. In this example, audio data can be recorded on the disc. For example, each piece of music is managed as one track (file).
[0013]
The disk on which the recording / reproducing operation is performed in the file storage unit 5 is not particularly limited as long as audio data can be recorded or reproduced. As an example, a magneto-optical disk such as a mini disk may be used, or a disk capable of reproducing various data according to the CD system may be used.
Furthermore, a configuration in which the file storage unit 5 is a hard disk drive (HDD) is also conceivable.
Further, it may be a device unit that can selectively reproduce a plurality of stored discs, such as a CD changer driver.
As a medium, a form other than a disk medium is also conceivable. That is, the file storage unit 5 may be configured as a memory driver capable of recording / reproducing corresponding to a solid-state memory such as a flash memory.
[0014]
As the term corresponding to the “program” in the present invention, the term “track” used in the CD system and the MD system has been used. However, as described above, examples of configurations of various recording media and drives are provided. Therefore, the more general term “file” is also used as a term corresponding to “program” in the present invention. For example, in the case of music data, one music is recorded as one file.
[0015]
In any case, in this example, the file storage unit 5 is a part capable of reading and outputting at least a large number of files as music data recorded in a removable portable medium or a fixed medium that cannot be extracted. Is done.
[0016]
At the time of recording, the audio data processor 9 performs, for example, data compression processing according to a required method, error correction code addition processing, and encoding suitable for the medium in the file storage unit 5 on the input audio data. Necessary signal processing such as processing is performed, and the data is supplied to the file storage unit 5 through the data bus 30 as recording data.
At the time of reproduction, audio data read from the medium in the file storage unit 5 is taken in via the data bus 30 and subjected to demodulation processing, data expansion processing, error correction processing, etc. according to a required method. Output as playback audio data.
Further, various acoustic effect processing, audio mixing processing, audio tempo changing processing, pitch (pitch / tone) conversion processing, and the like according to the selected reproduction mode can be performed as described later.
[0017]
In the case of this example, there are two systems of recording data input to the audio data processor 9.
One is a signal system for inputting audio data supplied from the A / D converter 12. In this case, the microphone audio signal supplied from the microphone terminal T <b> 1 is input to the A / D converter 12 via the microphone amplifier 13. The A / D converter 12 is also connected to a line input terminal T2 to which an analog audio signal is input.
The other is a signal system for inputting digital audio data transmitted from the connector 11 via the data interface 10 from an external device via the data bus 30.
[0018]
At the time of reproduction, reproduced audio data output from the audio data processor 9 is converted into an analog audio signal by the D / A converter 14 and is connected to the speaker 16 or the headphone terminal (or the line output terminal) via the amplifier 15. Good) output for T3.
Further, the audio data processor 9 can output the digital audio signal as it is to the external device via the data bus 30 and the data interface 10 -connector 11.
[0019]
In this example, data other than audio data can also be transmitted via the data interface 10. For example, as will be described later, a character information file and an image file (audio related data) that are associated with each piece of audio data as a track are fetched via the data interface, and the file storage unit 5 is loaded with the media. It is also possible to record.
[0020]
The display unit 8 includes, for example, an LCD (Liquid Crystal Display), and is displayed by being driven by the display driver 7. The operation of the display driver 7 is controlled by the CPU 2 in accordance with required display contents.
For example, when there is a file number of a song to be played, a playback progress time, or related character information, such information can be displayed on the display unit 8 under the control of the CPU 2.
[0021]
The operation unit 6 is provided with various operators operated by the user in order to execute a required operation in the recording / reproducing apparatus 1. In the operation unit 6, an operation information signal corresponding to an operation performed on the operation element is transmitted to the CPU 2. The CPU 2 executes a required control process in response to the operation information signal transmitted from the operation unit 6. Thereby, the operation of the device according to the operation on the operation unit 6 is obtained.
Further, among the operators in the operation unit 6, basic operators such as a play key, a stop key, a pause key, a record key, etc. are prepared as particularly related to the recording / reproducing operation of this example. As keys for instructing, an operator that can specify normal playback, shuffle playback, program playback, and super shuffle playback is prepared.
[0022]
Although not shown here, for example, a remote controller capable of performing the same operation as the operation unit 6 is provided, and a required operation in the recording / reproducing apparatus 1 is executed according to the operation performed on the remote controller. You may comprise as follows.
[0023]
It is also conceivable that so-called touch panel operations can be performed together with the display of icons and the like on the display unit 8.
For example, a dedicated input pen is prepared, and a pen touch operation can be performed by, for example, a capacitance detection type method. That is, an electrode is provided at the tip of the input pen and the electrodes are arranged in a matrix form in a range corresponding to the display surface of the display unit 8. Then, since the position touched by the input pen can be detected as the capacitance change position by the matrix electrode, it can be determined that the operation input as the operation image (icon) displayed at the position has been performed.
As another example, a mechanical configuration in which matrix-like switch electrodes are arranged in two layers with respect to the display surface, and contact of the switch electrodes is detected at a position pressed by a pen or a user's finger. Is also possible.
[0024]
The CPU 2 executes control on each functional circuit unit, internal arithmetic processing, and the like in order to realize a required operation in the recording / reproducing apparatus 1.
The ROM 3 stores various necessary programs to be executed by the CPU 2 and various data necessary for the processing of the CPU 2.
The RAM 4 holds a program read from the ROM 3 to be used by the CPU 2 and also holds data obtained by various control processes and arithmetic processes executed by the CPU 2.
[0025]
The configuration of the recording / reproducing apparatus as described above is merely an example, and the configuration as a device to which the present invention is applied is not limited to this, and various modifications can be made.
In such a recording / reproducing apparatus 1, a plurality of songs (files) recorded on a disk or a solid-state medium such as a CD, MD, HDD, etc. in the file storage unit 5 are reproduced by various reproduction methods. Can continue.
[0026]
As a playback method, in addition to the above-described normal playback, shuffle playback, and program playback, super shuffle playback, which is a characteristic operation of the present example, can be performed.
This super shuffle playback is an operation in which playable files (files recorded on media) are randomly played back in various playback modes. In particular, compared to the case where shuffle playback specifies a song order at random, and super shuffle playback, both the song order and the playback mode are specified at random. There is no unexpected reproduction.
Hereinafter, the super shuffle playback operation will be described. Prior to the operation, an example of the form of file data stored in the medium in the file storage unit 5 will be described.
[0027]
2. Data contents recorded on media and reproduction mode examples
An example of the storage form and management form of file data on the medium will be described with reference to FIGS.
FIG. 4 shows an example of a storage form in the medium in the file storage unit 5, and a management data area and a file data recording area are provided as recording areas in the medium.
[0028]
The blocks BLK0 to BLK (x) shown in the file data recording area are physical areas on the medium, and one file is recorded using one or a plurality of each area as the block. . That is, a block is a fixed area having a predetermined data length, and a necessary amount of blocks is used according to the file size to be recorded. Note that “0” to “x” in the blocks BLK0 to BLK (x) are block numbers, that is, correspond to physical addresses.
[0029]
In the management data area, management information for recording / playback of each file recorded using the above blocks BLK0 to BLK (x) is recorded. In particular, a file entry table and a link list are stored for playback management. To be recorded.
An example of the file entry table is shown in FIG.
[0030]
As shown in FIG. 5A, the file entry table is composed of a plurality of file records FRC1 to FRC (N).
Each file record corresponds to one file recorded in the file data recording area, and records its recording position and attribute information.
That is, as many file records as the number of recorded files (for example, the number of songs) are formed. Therefore, when file records FRC1 to FRC (N) are recorded, N files are recorded in the file data recording area. Means that exists. The number (1 to N) of the file record is also the file order (song order) during normal playback of N files.
[0031]
For example, as shown in FIG. 5B, at least the file number and the file name (or one of the file number and the file name) of the corresponding file are recorded in one file record.
In addition, as the recording position of the file, a head block number at which file data is started and a file size are recorded.
Further, as the file attribute information, file data attributes, for example, contents relating to a recording / reproducing operation method such as stereo / monaural, compression format, emphasis, and the like are recorded. Also, accompanying information can be recorded as necessary. For example, copyright information and copy permission information of file data, and text data and image data corresponding to the audio data content of the file as described above may be recorded.
[0032]
One file is normally recorded in a plurality of blocks. Therefore, since a plurality of blocks need to be linked in time series, a linked list as shown in FIG. 6 is formed.
This link list is a table for recording link information of blocks BLK0 to BLK (x) in the file data recording area.
Therefore, as shown in the figure, the link list is composed of link records LRC0 to LRC (x) corresponding to the number of blocks.
That is, each link record LRC0 to LRC (x) corresponds to each block BLK0 to BLK (x), and the link (how to connect) of each block is recorded by the link record LRC0 to LRC (x).
[0033]
That is, in each link record LRC0 to LRC (x), the block number (BLK0 to BLK (x)) of the corresponding block and the link data LD0 to LD (x) from each block are recorded. The link data LD0 to LD (x) indicate the number of the block in which the data that should follow the block data is recorded. When there is no data to be continued next, the value of the link data becomes “0”.
[0034]
FIG. 7 shows an example of the file management form using the file entry table and the link list.
For example, it is assumed that file records FRC1 and FRC2 are formed in the file entry table for the recorded first and second files, and a file name, a first block number, and the like are described as illustrated.
Here, it is assumed that the top block number is “4” and the block BLK4 is indicated in the file record FRC1.
In the link list, it is assumed that “7” is recorded as link data in the link record LRC4 corresponding to the block BLK4 as illustrated. That is, a link to the block BLK7 is shown.
Further, in the link list, link data “2” is indicated in the link record LRC7 corresponding to the block BLK7, link data “10” is indicated in the link record LRC2 corresponding to the block BLK2, and the link record LRC10 corresponding to the block BLK10 is linked. Data “12” is indicated, and link data LRC12 corresponding to the block BLK12 indicates link data “0”, that is, link end.
[0035]
This shows a state in which the data of the first file is recorded in five blocks of blocks BLK7 → BLK2 → BLK10 → BLK12 starting from the block BLK4. That is, the file storage unit 5 By reading blocks sequentially according to link management in the link list starting from the first block number of such a file record, it is possible to read out an appropriate audio data stream on the time axis.
[0036]
As for the second file, the link state is similarly managed starting from the file record FRC2, and it is indicated that the file data is recorded in the blocks BLK6.fwdarw.BLK3.fwdarw.BLK11.fwdarw.BLK14 in chronological order.
[0037]
The above file data recording forms and management forms in FIGS. 4 to 7 are suitable examples when the medium is an HDD or a solid-state memory, for example. Recording and management according to the format in the media will be performed. For example, as already known, in CD and MD, management information called TOC and U-TOC is formed, and each piece of music data is recorded and managed as a track.
However, it is needless to say that even if the recording form and the management form are different, the super-shuffle reproduction referred to in this example can be performed.
[0038]
Next, an example of a reproduction mode executed in super shuffle reproduction will be described. As described above, the super shuffle playback performed in the recording / playback apparatus 1 of the present example is an operation of selecting and playing back both the song order and the playback mode at random. There are reproduction position aspects and signal processing aspects.
For this reason, the CPU 2 prepares a playback location parameter and a playback tune parameter as playback mode parameters as shown in FIG. 3, and sequentially selects them at random.
[0039]
As the playback location parameter, for example, a mode related to M playback locations as shown in the figure is set, and one of them is selected.
As shown in the figure, various modes such as full chorus playback, intro playback, chorus playback, 1 chorus playback, 2 chorus playback,...
[0040]
Also, as the playback tune parameter, for example, a mode related to L playback processes as shown in the figure is set, and one of them is selected.
As shown in the figure, various modes such as normal playback, arrange playback I, II, III..., Sound effect playback I.
[0041]
The contents and processing methods of each mode relating to the playback location and signal processing are as follows.
[0042]
・ Full chorus playback
Full chorus playback is so-called normal playback of a file, that is, a mode in which a file (music) is played from the beginning to the end.
For example, in the case of full chorus playback of a certain song (file), a record corresponding to the song is searched from the file entry table, and after reading the first block number in the record, the data of the block of that block number is read. . The read data is reproduced and output as sound via the audio data processor 9. Next, the next block number is read from the link list, and data reading / reproduction output of the block of the block number is performed in the same manner. Thereafter, until there is no link destination (until a link record of link data “0” is found; that is, until the end of the file), data reading from each block and reproduction output through processing by the audio data processor 9 are repeated. As a result, for example, playback is performed through one song from the beginning to the end.
[0043]
・ A-B playback
AB playback is a mode in which playback is performed between two positions “A” and “B” in a song (file).
Let Zsize be the size of a song Z to be played. Assume that the unit of size is, for example, “bytes”. In this case, Zsize may be regarded as an integer.
When performing AB reproduction of the song Z, first, two integers larger than 0 and smaller than Zsize are arbitrarily selected (random numbers may be used). Then, {Zsize / BLsize} blocks are read in the order of the link list and transferred to the audio data processor 9. Here, “BLsize” is the block size (unit: bytes), and the term {*} means the smallest integer among integers not smaller than the number *.
As described above, it is possible to perform reproduction (A-B reproduction) of an arbitrary place of one song. However, in this example, the granularity of reproduction units (minimum reproduction unit) is data for the block size.
[0044]
・ Intro playback
Intro playback is a mode that plays back only the beginning of a song.
For this purpose, A = 0 and B = Bintro (constant) may be used instead of generating random numbers in the AB reproduction.
Bintro is a constant that means the amount of data that can be reproduced for a time that is considered sufficient as the beginning of a song, for example, 15 seconds, when data is reproduced.
For example, when the audio data is a linear PCM signal with a sampling frequency of 44.1 KHz,
Bintro = (44100 [Hz] x 15 [sec] x 2 [Ch]) / BLsize
For example, when the audio data is data compressed by the ATRAC2 compression method,
Bintro = (15 [sec] /0.0224) × (424 [byte] / BLsize)
And so on.
[0045]
・ Rust regeneration
The rust reproduction is a mode in which a rust portion in a so-called song is extracted and reproduced.
For this purpose, it is necessary to know where the rust is in the song. For example, if the address indicating the position of the rust is recorded in the accompanying information described above, the designated portion is reproduced. You just have to do it. Data indicating such a chorus part is set by a manufacturer or the like that provides music, and is recorded at the same time as accompanying information when music data is recorded in the file storage unit 5 on the user side (for example, Provided through a communication network). In addition, disc media known as CD-TEXT, DVD, etc. can record various types of information corresponding to songs on the media, so that when such media is used, chorus position information is recorded in advance. What should I do?
On the other hand, when rust position information does not exist, a method of automatically searching for a portion that seems to be rust in the music may be considered.
For example, rust is usually the most exciting part of a song, and as a musical tendency, the sound pressure level continuously increases to some extent, or the high frequency component increases in frequency. .
Therefore, by searching the volume level and frequency distribution on the time axis for the file data, it is possible to determine a portion that seems to be rusted. Therefore, it is possible to read out the portion extracted by such a search and reproduce it as rust reproduction.
[0046]
・ 1 chorus playback, 2 chorus playback
These are modes in which a part of a song called 1 chorus and 2 chorus is played.
For example, 40% and 80% of the size of the song Z to be played are defined as 1 chorus playback and 2 chorus playback, respectively. Therefore, instead of generating a random number in the above AB reproduction, A = 0, B = “Zsize × 0.4 / BLsize” or B = “Zsize × 0.8 / BLsize”.
Alternatively, a data size Zc of one chorus may be recorded as file attribute information in each file record in the file entry table. Playback is performed in the same manner as AB playback with A = 0 and B = “Zc / BLsize”.
[0047]
With respect to the playback location parameter, for example, various modes for the playback location (section) for the file are set as described above, and each mode is read from the file storage unit 5 by the above-described method, for example.
That is, the CPU 2 selects a playback location parameter, and instructs the file storage unit 5 to read in the mode specified by the playback location parameter, thereby executing playback in the various playback sections as described above.
Of course, these are only examples, and more various examples of the playback location modes are possible.
[0048]
Reproduction music tone (signal processing) modes selected by the reproduction music tone parameters are as follows.
[0049]
Normal playback
Normal playback is a mode in which the audio data processor 9 performs playback processing without performing special processing. For example, the audio data transferred from the file storage unit 5 is only subjected to, for example, equalization (tone tone) according to a user operation in addition to performing a required decoding process.
[0050]
Arrange playback
As the arrangement reproduction, various modes can be considered as indicated by I, II, III.
For example, changing the song speed or changing the tone (pitch) of the song is the arrangement here.
The music speed can be realized, for example, by changing the sampling rate. The sampling rate can be changed by changing the clock input to the D / A converter 14 and the mode of the D / A converter itself.
Assuming that the clock period necessary for realizing the sampling frequency at which the audio data is recorded is fclk0, the clock period fclk is made faster than the sampling frequency at which the audio data is recorded (fclk> fclk0) in order to increase the music speed. Further, in order to slow down the music speed, the clock cycle may be slowed down (fclk <fclk0).
Also, the conversion of the pitch (tonality) of the music can be realized by performing waveform conversion (frequency conversion) on the digital data.
Furthermore, if not only the clock of the D / A converter but also the data transfer rate is changed, the pitch of the reproduced sound will naturally change according to the change in the music speed. Therefore, even if such a mode is set. Good.
[0051]
・ Mix playback.
Mixed playback is a mode in which, for example, two songs (files) are mixed and played back simultaneously.
The mixing of the music M1 and the music M2 is performed as follows, for example.
File records corresponding to the music piece M1 and the music piece M2 are searched from the file entry table, and the first block number is read. Then, data is read from the first block, and the read data is stored in, for example, the RAM 4.
When the music piece M1 or the music piece M2 is compressed data, it is decompressed by the audio data processor 9 and stored in the RAM 4.
The data read into RAM4 is SM ₁ i, i = {1,2,3, ...}, SM ₂ Let i, (i = {1,2,3,...}). These signals are sent to the CPU 2 (or the audio data processor 9)
SM ₁₂ i = (c ₁ SM ₁ i + c ₂ SM ₂ i) / 2
(However, c ₁ And c ₂ C ₁ + C ₂ = Appropriate non-negative coefficient satisfying 1)
Add the data SM ₁₂ i, (i = {1, 2, 3,...}) is transferred to the D / A converter 14 via the audio data processor 9 and reproduced and output. Thereafter, the same processing is performed for the next block of the two songs, and the process may be repeated until one of the files ends (or until the playback section selected by the playback location parameter ends).
[0052]
・ Sound effect playback
As for the sound effect reproduction, various modes can be considered as indicated by I, II, III.
In this case, various processes such as reverb, echo, equalizing, etc. can be considered as acoustic effects.
It is known that the atmosphere of the reproduced sound is greatly changed by performing certain acoustic processing or complex acoustic processing.
Therefore, it is conceivable to set various acoustic processes as various modes. For example, a mode that greatly changes the tune by applying extreme reverb or echo, a mode that makes it sound as if it was received on an old radio by equalizing or noise mixing processing, a mode such as analog record playback sound, A mode that emphasizes the low range and enhances the sense of reality, and a mode that simulates the acoustic effect of the concert hall are considered.
[0053]
With respect to the reproduction tune parameter, for example, various modes for signal processing on audio data are set as described above.
Then, the CPU 2 selects the reproduction tune parameter and instructs the signal processing in the mode specified by the reproduction tune parameter to a necessary part of the audio data processor 9 or the like, so that various tunes as described above change. The mode is played back.
Of course, these are only examples, and more various examples of the playback tune modes are possible.
[0054]
3. Super shuffle playback process
The processing of the CPU 2 when performing the super shuffle operation will be described.
Super shuffle playback is started in response to a user giving a super shuffle playback instruction from the operation unit 6. Specifically, for example, by performing a reproduction operation after selecting the super shuffle reproduction mode, the CPU 2 starts the process of FIG. 2 and executes the super shuffle reproduction.
[0055]
That is, the CPU 2 proceeds from step F101 to F102 in FIG. 2 in response to the user performing an operation to instruct super-shuffle playback, and first generates a random number to randomly select the value of the playback location parameter m. That is, one of the M modes described above is selected as the playback location mode.
In step F103, a random number is generated in the same manner, and the value of the reproduction tune parameter l is selected at random. That is, one of the L modes described above is selected as the reproduction tune mode.
[0056]
Subsequently, the file number to be reproduced is selected. That is, the process proceeds to step F105, where a random number is generated and the value of the file number n is selected at random. That is, one of N files recorded on the medium is selected as a file to be played.
However, if the value of the playback tune parameter l selected in step F103 is equivalent to the above-described mixed playback mode, it is necessary to select two files, and the process proceeds from step F104 to F106. A random number is generated, and the values of the two file numbers n1 and n2 are selected at random. That is, two files out of N files recorded on the medium are selected as files to be reproduced.
[0057]
Through the above processing, one file to be played (or two files in the case of mixed playback), one playback location mode, and one playback tune mode are selected at random. Become.
In step F107, an instruction is issued to the file storage unit 5 and the audio data processor 9 to execute an operation of reproducing the selected file in the selected reproduction location mode and the selected reproduction tune mode.
[0058]
During the period during which this playback operation is being performed, it is monitored in step F108 whether or not file playback (playback in the selected playback location mode) has been completed, and in step F109, the presence or absence of a user's stop operation is monitored. is doing.
When the current file reproduction is completed, the process returns to step F102, and in the processes up to step F105 or F106, random selection for subsequent reproduction, that is, one file (or two files to be reproduced) as described above. File), one playback location mode, and one playback tune mode are selected at random, and playback is executed in step F107.
[0059]
If there is a user's stop operation, the process proceeds from step F109 to F110, the playback operation stop is instructed to each unit, and the process ends.
[0060]
As described above, at the time of super shuffle reproduction, random selection as described above is performed for each file reproduction, and the selected file is reproduced according to the selected reproduction location mode and reproduction tune mode. .
Thus, for example, at first, only the intro part of a file is played back by arrange playback I, then the chorus part of a file is normally played back, and then the whole song is played back by the processing of the sound effect II. In this way, playback that is completely unpredictable for the user is sequentially performed.
In addition, while the song is known to the user and is recorded in the file storage unit 5, the playback location is a part of the song, or the special arrangement or sound as described above. Processing, mix processing, etc. are performed, so it may be a song that the user does not know. In other words, it is possible to make it appear to the user that there are various songs beyond the range of the songs recorded on the media.
From these, it is possible to provide a very interesting reproduction that is surprising to the user.
[0061]
In the process of FIG. 2, the super-shuffle playback is terminated by the user's stop process. However, for example, when all the files are selected once and the playback is completed, the super-shuffle playback is automatically performed. It may be terminated. However, in this super shuffle playback, even if the same file (song) is selected, it may sound like a different song depending on the playback location mode and playback tone mode. In particular, when a large number of playable playback mode and playback tune mode are set, it is rare for a file to be played multiple times in the same playback mode. Therefore, even if a certain file is selected a plurality of times, it will be possible to enjoy different parts and tunes each time the file is played. Therefore, the super shuffle operation will be continued endlessly, and the operation will be terminated as shown in FIG. It is also considered preferable to leave it to the left.
[0062]
The example of the embodiment has been described above, but various modifications and application examples can be considered as the present invention.
In particular, as a reproduction mode, it is needless to say that various examples other than those illustrated in FIG. In other words, an acoustic process that can be performed according to the processing capability of the playback apparatus and a method for reading from the medium may be set as a mode.
[0063]
In addition, among various modes that can be executed as a playback mode, the user may be able to specify a range that is randomly selected during super shuffle playback. For example, a user who does not like mixed playback can set the playback music tone parameter so that the mixed playback mode is not selected in advance. In this way, it is possible to realize super shuffle playback in which a variety of playback modes other than the playback mode that is not preferable for the user is removed, and random playback modes are selected.
Similarly, for example, when super shuffle playback is executed as BGM (background music), there is an advantage that it is possible to prevent a playback tune mode that is too inappropriate for BGM from being selected.
[0064]
In the above example, the playback mode is divided into two groups, the playback location and the playback tune, and each is selected at random. However, the playback mode is randomly selected with three or more groups or without grouping. It may be possible to make a simple choice.
[0065]
In addition to a random selection, in order to wait for the relevance between the music to be played and the playback music tone / location to some extent, the playback mode selected when a certain file is selected is limited, or the characteristics of the music For the purpose of matching, weighting of the superiority of selection of each data in the reproduction mode may be performed on the file.
[0066]
Furthermore, in the embodiment, playback of audio data (music etc.) has been described. However, the present invention can also be applied to a system that stores moving image data as a file. That is, by setting various playback position modes in a video image as a single file and video and audio signal processing modes and selecting them randomly, super-shuffle for video playback can be realized.
[0067]
【The invention's effect】
As described above, according to the present invention, as one of the reproduction operations for the recording medium (the above-described super shuffle), the program number and the reproduction mode of the program can be sequentially selected and reproduced. . In particular, as a playback mode, a playback location in the program is selected at random, or a signal processing method for audio data or video data is selected at random.
This makes it possible to perform a very diverse reproduction output for a limited number of programs (music, etc.) recorded on the recording medium, which is unexpected for the listening user. It has the effect of greatly expanding the enjoyment of playback, such as giving sex and not getting bored.
[Brief description of the drawings]
FIG. 1 is a block diagram of a playback apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart of super shuffle playback processing performed by the playback apparatus according to the embodiment;
FIG. 3 is an explanatory diagram of an example of a reproduction mode of the reproduction apparatus according to the embodiment.
FIG. 4 is an explanatory diagram of a recording form of the recording medium of the embodiment.
FIG. 5 is an explanatory diagram of a file entry table of the recording medium according to the embodiment.
FIG. 6 is an explanatory diagram of a link list of the recording medium according to the embodiment. It is.
FIG. 7 is an explanatory diagram of a file link form of the recording medium according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus, 2 CPU, 3 ROM, 4 RAM, 5 File storage part, 6 Operation part, 7 Display driver, 8 Display part, 9 Audio data processor, 10 Data interface, 11 Connector, 30 Data bus

Claims (14)

Reading means capable of reading data from a recording medium that stores data in units of programs and manages each program by assigning a program number corresponding to the reproduction order, and
Signal processing means capable of performing required signal processing on the data read by the reading means and outputting as reproduced sound;
Reproduction of the data recorded on the recording medium by randomly selecting the reproduction location mode from the reproduction location modes in a plurality of set programs and causing the reading means and the signal processing means to perform a reproduction operation. Control means;
A playback apparatus comprising: The reproduction control means randomly selects the signal processing mode from a plurality of set signal processing modes for the data read by the reading means, and performs reproduction operations on the reading means and the signal processing means. The playback apparatus according to claim 1, wherein: Reading means capable of storing data in units of programs and reading data from a recording medium managed by assigning a program number corresponding to the reproduction order for each program;
Signal processing means capable of performing required signal processing on the data read by the reading means and outputting as reproduced sound;
For the data recorded on the recording medium, the signal processing mode is randomly selected from the signal processing modes for the data read by the plurality of reading means, and the reading means and the signal processing means are selected. Reproduction control means for executing a reproduction operation;
A playback apparatus comprising: 4. The playback apparatus according to claim 1, wherein the playback control means controls the data recorded on the recording medium to be played back by randomly selecting a program number. 4. The playback apparatus according to claim 1, wherein the playback control unit controls the data recorded on the recording medium to be played back continuously. The playback apparatus according to claim 1, wherein the playback location mode includes at least one of full playback, rust playback, intro playback, chorus partial playback, and repeat playback. The playback apparatus according to claim 3, wherein the signal processing mode includes at least one of acoustic processing of tempo, pitch, reverb, echo, and incolating. A procedure for reading data from a recording medium that stores data in units of programs, and manages each program by assigning and managing a program number corresponding to the playback order ;
A signal processing procedure capable of performing a required signal processing on the data read in the reading procedure and outputting it as reproduced sound;
Reproduction of data recorded on the recording medium by randomly selecting the reproduction location mode from reproduction location modes in a plurality of set programs and executing a reproduction operation in the reading procedure and the signal processing procedure Control procedures;
A playback method comprising: The reproduction control procedure randomly selects the signal processing mode from a plurality of signal processing modes set for the data read by the reading procedure, and performs a reproduction operation in the reading procedure and the signal processing procedure. The playback method according to claim 8, wherein: A procedure for reading out data from a recording medium that stores data in units of programs and manages each program by assigning a program number corresponding to the reproduction order, and
A signal processing procedure capable of performing a required signal processing on the data read by the reading means and outputting it as reproduced sound;
For the data recorded on the recording medium, the signal processing mode is randomly selected from the signal processing modes for the data read by the set reading procedure, and in the reading procedure and the signal processing procedure A playback control procedure for executing the playback operation;
A playback method comprising: 11. The reproduction method according to claim 8, wherein the reproduction control procedure controls the data recorded on the recording medium to be reproduced by randomly selecting a program number. 11. The reproduction method according to claim 8, wherein the reproduction control procedure performs control so that data recorded on the recording medium is continuously reproduced. The playback method according to claim 8, wherein the playback location mode includes at least one of full playback, rust playback, intro playback, chorus partial playback, and repeat playback. The reproduction method according to claim 10, wherein the signal processing mode includes at least one of acoustic processing of tempo, pitch, reverb, echo, and incolating.

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