JP2001126391A - Information retrieving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information retrieving device capable of retrieving all pieces of music data recorded in a recording medium by characteristics data and retrieving the music data based on operation history of a user as well. SOLUTION: This information retrieving device is provided with a drive 102 to read and write the music data in a disk, a memory 103 for recording/ reproduction to temporarily store compressed music data, an extending means 107 for reproduction, a reproducing means 108 to reproduce the music data, a compressing means 106 to record the music data, a memory 104 for extracting characteristics, an extending means 109 for extracting characteristics, a characteristics extracting means 110, a memory control means 105 to perform control of writing or reading of the music data in the drive based on the remaining capacity of the memory 103 for recording/reproduction and the memory 104 for extracting characteristics and a characteristics parameter list updating means 111 to read and update a characteristics parameter list of the music data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information retrieval apparatus, and more particularly, to recording additional information together with recording information in an information recording / reproducing apparatus, and performing efficient retrieval and reproduction of recorded information based on the recorded additional information. The present invention relates to an information retrieval device capable of performing the following.

[0002]

2. Description of the Related Art A conventional information retrieval apparatus will be described below with reference to the drawings. FIG. 8 is a block diagram showing the configuration of a conventional information retrieval apparatus. In the drawing, a recording unit 50 shows blocks required for recording music data, and a reproducing unit 51 shows blocks required for reproducing music data. 501
Is compression means for compressing input music data by MPEG, AAC, or the like, and 502 is a feature extraction means for extracting music features from the music data. The feature extraction method is described in, for example, JP-A-10-134549. As shown, there is a method in which music data is divided into a plurality of bands using a band-pass filter, and features such as a rhythm, a musical instrument, and a pitch are extracted from features of each power spectrum. The disk-shaped recording medium 503 is a magneto-optical disk or an optical phase change disk, 504 is a drive for recording compressed music data and music characteristic data on the disk-shaped recording medium 503, and 505 is a disk-shaped recording via the drive 504. Search means for reading characteristic data from the medium 503 and searching for music data to be reproduced based on the characteristic data.
Output to Reference numeral 506 denotes expansion means for expanding compressed music data read from the disk-shaped recording medium 503 by the drive 504 based on a reproduction command of the search means 505, and 507 denotes reproduction means for amplifying and emitting sound of music data.

With such a configuration, at the time of recording,
The characteristic data obtained by extracting the characteristic from the music data to be recorded is recorded together with the music data, and at the time of reproduction, the music data to be reproduced is searched based on the characteristic data specified by the user. It is intended to be played.

[0004]

However, in such a configuration, since characteristic extraction is performed at the time of recording, if music data for which no characteristic has been extracted is already recorded on a disk-shaped recording medium, such data is targeted. In addition to being unable to search using the feature data, the operations performed by the user at the time of the search are not recorded, so the efficiency of the input operation at the next search can be improved, and the user's favorite songs can be searched based on the operation history. There was a problem that it was not possible.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which all music data recorded on a recording medium can be searched for by using feature data, and based on a user's operation history. It is an object of the present invention to provide an information search device capable of searching.

[0006]

According to the present invention, there is provided an information retrieval apparatus comprising: a drive for reading and writing music data on a disk; a recording / reproducing memory for temporarily storing compressed music data; a reproducing decompression means for reproducing; Playback means, compression means for performing recording, memory for feature extraction for feature extraction, decompression means for feature extraction and feature extraction means,
Memory control means for controlling writing / reading of music data to / from the drive based on the remaining capacity of the recording / reproduction memory and feature extraction memory, and a feature parameter list updating means for reading / updating a feature parameter list of the music data It is provided with.

[0007] According to the present invention, the intermittent time of disk access that occurs during reproduction or recording is used to read already recorded music data from which features have not been extracted, and feature extraction is performed by performing high-speed decompression. All music data recorded on the shape recording medium can be searched by the characteristic data, and if an operation history update unit and the search unit are provided, a search based on the operation history can be performed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same reference numerals are used for the same portions in each embodiment.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of an information search apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory diagram of a file structure in Embodiment 1 of the information search apparatus of the present invention. FIG. 3 is a diagram showing a change in remaining memory in the information search device according to the first embodiment of the present invention, and FIG. 4 is a flowchart showing a search flow in the information search device according to the first embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a disk-shaped recording medium such as a magneto-optical disk or an optical phase change disk;
Is a drive for accessing a specific sector of the disk-shaped recording medium 101 by a servo or an optical pickup in response to an external command and reading or writing compressed music data or a characteristic parameter list. 103 is a recording / reproducing memory. At the time of reproduction, the compressed music data read from the disk-shaped recording medium 101 via the drive 102 is temporarily stored.
And temporarily stores the compressed music data to be written on the disk-shaped recording medium 101. Reference numeral 104 denotes a feature extraction memory for temporarily storing compressed music data that has already been recorded on the disk-shaped recording medium 101 but has not been subjected to feature extraction. Reference numeral 105 denotes a recording / playback memory 103 and a feature extraction memory 104. Drive 102 based on remaining
On the other hand, a memory control means for controlling writing or reading of the compressed music data, a compression means for compressing the music data to be recorded and outputting the compressed music data to the recording / playback memory 103. AAC and MP3
And the like.

Reference numeral 107 denotes a reproducing expansion means for expanding the compressed music data temporarily stored in the recording / reproducing memory 103, and 108 amplifies the music data expanded by the reproducing expansion means 107, and controls a speaker or the like. Reproduction means for emitting sound by using; 109, a characteristic extraction decompression means for decompressing the compressed music data temporarily stored in the characteristic extraction memory 104; 110, a music data decompressed by the characteristic extraction decompression means 109; In this embodiment, features such as musical instruments, pitches, chords, and rhythms are referred to as feature parameters, and a list of feature parameters for each piece of music data is referred to as a feature parameter list.

Numeral 111 denotes a feature parameter list updating unit which converts a feature parameter list, which is a list of features extracted from music data in the past, recorded on the disk-shaped recording medium 101, before reproducing or recording the music data. Then, the characteristic parameter of the music data newly extracted by the characteristic extracting means 109 is read out via the drive 102, and the characteristic parameter list is recorded on the disk-shaped recording medium 101 via the drive 102. For example, in the file structure as shown in FIG. 2, the feature parameter list is used by a user other than a data area in which music data is recorded and a management information area in which address information of recorded data is recorded. Record in a freely available user area.

Reference numeral 112 denotes an input means for inputting a search condition or operation instruction of music data by a user and outputs it to the search means 113; 114, a display means for displaying search or operation-related data; 113, a search means; Based on the feature parameter list output from the list updating unit 110 and the search condition or operation instruction from the input unit 111, the music data to be reproduced and the reproduction order thereof are determined, and a read command of the music data is given to the drive 102.

The operation will be described below.

(1) At the time of reproduction First, the characteristic parameter list updating means 111 reads the characteristic parameter list from the disk-shaped recording medium 101 via the drive 102 and outputs it to the searching means 113. Until the music data for feature reproduction is selected by the user, the music data to be feature extracted is read out, and feature extraction is performed by the feature extraction memory 104, the feature extraction decompression means 109, and the feature extraction means 110. The search means 113 outputs and displays the characteristic parameters to the display means 114 for the user. The user inputs search conditions such as rhythm and pitch of desired music data via the input unit 112. The search means 113 outputs the music data corresponding to the search condition from the input search condition and the characteristic parameter list to the display means 114, and after the user selects the music data from the music data,
A read command based on the address information of the selected music data is output to the drive 102. The memory control unit 105 monitors the remaining memory of the recording / reproducing memory and the feature extracting memory 104 and outputs a command to select reading of each data to the drive 102. Memory control means 10
The detailed operation of No. 5 will be described later. When the reproduction data is read, the reproduction data is temporarily stored in the recording / reproduction memory 103, and is reproduced by the reproduction means 108 while being expanded by the reproduction expansion means 107. When the feature extraction data is read, the read music data is stored in the feature extraction memory 104.
And the feature extracting unit 109 expands the feature extracting unit 109 at a higher speed than the reproducing expanding unit 107.
0 is used to extract characteristic parameters such as rhythm and pitch. The extracted feature parameters are input to the feature parameter list updating means, added to the existing feature parameter list, and recorded on the disk-shaped recording medium 101 via the drive. The recording of the characteristic parameters is performed when recording / reproduction is stopped or when the use of the information retrieval device is ended. FIG. 4 shows a main flow of the search.

(2) At the time of recording The compression means 106 compresses the recording data and writes it in the recording / reproducing memory 103. On the other hand, music data for which feature extraction has not been performed is read from the disk-shaped recording medium 101. Each access is controlled by monitoring the remaining memory of the recording / reproduction memory and the feature extraction memory 104 by the memory control unit 105. The detailed operation of the memory control means 105 will be described later. The read music data is temporarily stored in the feature extracting memory 104, and the feature extracting / expanding unit 109 reproduces the music data.
The feature extraction unit 110 extracts feature parameters such as rhythm and pitch while expanding at a speed higher than 7. The extracted feature parameters are input to the feature parameter list updating means and added to the existing feature parameter list,
The data is recorded on the disk-shaped recording medium 101 via the drive 102. The recording of the characteristic parameters is performed when recording / reproduction is stopped or when the use of the information retrieval device is ended.

Next, the memory control will be described with reference to FIG.

FIG. 3A shows the remaining capacity of the recording / reproducing memory 103, and FIG. 3B shows the remaining capacity of the feature extracting memory 104. In FIG. 3A, (a-1) shows a change in the remaining memory of the compressed music data read from the disc-shaped recording medium 101 via the drive 102 during reproduction, and (a-2) shows a change in the recording time. 5 shows changes in the remaining amount of memory when music data compressed by the compression means 105 is written to the disk-shaped recording medium 101 via the drive 102.

At the time of reproduction, access to the disk-shaped recording medium 101 is controlled such that the remaining amount of the recording / reproduction memory 103 is between the thresholds RP-Hi and RP-Low as shown in (a-1). You. That is, access is performed between times BC and DE. On the other hand, the access for feature extraction is performed using the time interval between the times A to B and C to
D, EF. However, if the remaining amount of the feature extraction memory reaches EX-Hi during the access for feature extraction, the access is stopped and the data reading is stopped.

At the time of recording, the remaining amount of the recording / reproducing memory 103 changes as shown in (a-2), but the access control is the same as that at the time of reproducing (1). Also, | α |
The ratio between | β | and | β | indicates the ratio of the decompression speeds of the reproduction decompression means 107 and the feature extraction decompression means 109, and | α | ≦ | β |.

With such a configuration, it is possible to perform characteristic extraction during reproduction or recording and access control based on the remaining amount of memory, thereby enabling music data recorded on the disk-shaped recording medium 101, including unextracted music data. In addition, the time required for the search and the feature extraction time can be reduced.

As described above, according to the present embodiment, the intermittent time of the disk access that occurs during reproduction or recording is used for reading out the music data for which the characteristics have not been extracted and which has been recorded at a high speed. Since the extraction is performed, all music data recorded on the disk-shaped recording medium can be searched by the characteristic data, and the time until such a state can be minimized.

(Embodiment 2) FIG. 5 is a block diagram showing a configuration of an information search apparatus according to Embodiment 2 of the present invention, and FIG. 6 shows a search flow in Embodiment 2 of the information search apparatus of the present invention. FIG. 7 is a flowchart illustrating a bookmark of an operation history according to the second embodiment of the information search device of the present invention.

In FIG. 5, the disk-shaped recording medium 10
1, the recording / reproduction memory 103, the compression means 106, the reproduction decompression means 107, the reproduction means 108, and the display means 114 have the same configuration and functions as those shown in FIG.

Reference numeral 301 denotes a drive which receives a command from the outside, accesses a specific sector of the disk-shaped recording medium 101 by a servo or an optical pickup, and reads or writes compressed music data or a characteristic parameter list or operation history. Do. Reference numeral 302 denotes an input unit for the user to give an instruction for music data search or operation to the search unit 303, and the output is also output to the operation history update unit 304.

Reference numeral 303 denotes search means for determining the music data to be reproduced and the reproduction order based on the characteristic parameter list and operation history read from the disk-shaped recording medium via the drive and the user's operation by the input means. Drive 301 for parameter list and operation history
Then, the music data to be reproduced and the reproduction order thereof are determined based on the search condition or operation instruction from the input means 302, and a read instruction of the music data is given to the operation history updating means 304 and the drive 301.

The operation history updating means 304 updates the operation history based on search items input by the user, such as a reproduction order command and search conditions, and records the updated operation history on the disk-shaped recording medium 101 via the drive 301. The operation history is, for example, as shown in FIG.
In the file structure as shown in the figure, recorded in the user area that the user can use freely, other than the data area where the music data is recorded and the management information area where the address information of the recorded data is recorded I do.

The operation will be described below. At the time of reproduction, the retrieval means 303 first reads out the characteristic parameter list and the operation history from the disk-shaped recording medium 101 via the drive 301, and displays the characteristic parameters on the display means 1.
14 is output. The user selects a desired search condition from the characteristic parameters displayed on the display unit 114 and inputs it to the input unit 302. The search means 303 further outputs the operation history to the display means 114. The user can display means 114
The user selects a desired search condition from the operation history displayed in (1) and inputs the search condition to the input unit 302. The search unit 303 outputs music data candidates corresponding to the search conditions to the display unit 114, and after the user selects one of them, outputs a read command based on the address information of the selected music data to the drive 301. The operation history update unit 304 updates the operation history based on the search condition expression used for the search, the reproduction time, the number of reproductions, the reproduction date and time, the reproduction time, and the like, and records the operation history on the disk-shaped recording medium 101 via the drive 301. . The read music data for reproduction is temporarily stored in the recording / reproduction memory 103, expanded by the reproduction expansion means 107, and reproduced by the reproduction means 108. At the time of recording, the recording data is compressed by the compression means 106 and the recording / reproducing memory 103
Is temporarily stored in the disk-shaped recording medium 101 via the drive 301. Figure 6 shows the main flow of the above search
Shown in

Next, the operation of the retrieval means will be described.

(1) In the case of using a search condition expression A search condition most frequently used by a user is found from a search condition expression of a feature parameter input by a user in the past, and the corresponding music data is searched based on a feature parameter list. In addition, the user can perform a search in accordance with the user's preference, such as presenting the search condition before inputting the search condition, thereby saving the trouble of inputting when the user wants to listen to music having the same search condition as in the past. .

(2) When the Number of Reproductions is Used A candidate for reproducing music data is presented by arranging music data in descending order of the number of reproductions by the user in the past.

(3) When using the reproduction date and time Based on the reproduction date and time, the music data that the user has listened to frequently recently is preferentially presented.

(4) When Using Reproduction Time Music data whose reproduction time is shorter than the length of the music data is not matched to the user's preference, and the presentation order is postponed.

(5) Using Bookmarks Music data of the same bookmark is presented together by using a bookmark arbitrarily added by the user. As shown in FIG. 7, a bookmark can be added for each song.

As described above, according to the present embodiment, the search including the past operation history can be performed at the time of the search.
User convenience such as simplification of condition input work and shortening of search time can be improved.

[0036]

As described above, according to the present invention, the intermittent time of the disk access generated at the time of reproduction or recording is used for reading the already-extracted music data whose characteristics have not been extracted, and the characteristics are expanded at a high speed. Since extraction is performed, all music data recorded on the disk-shaped recording medium can be searched for by using characteristic data, and furthermore, an advantageous effect that a search based on a user's operation history can be performed can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an information search device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a file structure in Embodiment 1 of the information search device of the present invention.

FIG. 3 is a diagram showing a change in a remaining memory amount in the information search device according to the first embodiment of the present invention;

FIG. 4 is a flowchart showing a search flow in the information search device according to the first embodiment of the present invention;

FIG. 5 is a block diagram showing a configuration of an information search device according to a second embodiment of the present invention;

FIG. 6 is a flowchart showing a search flow in the information search device according to the second embodiment of the present invention;

FIG. 7 is an explanatory diagram of a bookmark of an operation history according to the second embodiment of the information search device of the present invention.

FIG. 8 is a block diagram showing a configuration of a conventional information search device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Disc-shaped recording medium 102, 301 Drive 103 Recording / playback memory 104 Feature extraction memory 105 Memory control means 106 Compression means 107 Reproduction expansion means 108 Reproduction means 109 Feature extraction expansion means 110 Feature extraction means 111 Feature parameter list update Means 112, 302 Input means 113, 303 Search means 304 Operation history update means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 15/403 340B G11B 27/10 A (72) Inventor Tatsuya Adachi 1006 Odakadoma, Kadoma, Osaka Matsushita Electric Within Sangyo Co., Ltd. (72) Inventor Hidefumi Miyashita 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 5D077 AA29 CA02 DC08 DC15 DE08 FA10 HC26

Claims (3)

[Claims] 1. A drive for reading or writing at least music data from / to a disk-shaped recording medium, and a temporary storage for compressed music data read by the drive during reproduction, and a disc via the drive during recording. Recording / playback memory for temporarily storing compressed music data to be written on a disk-shaped recording medium, and temporarily storing compressed music data already recorded on a disk-shaped recording medium but not subjected to feature extraction Memory for controlling the writing or reading of compressed music data to or from the drive based on the remaining capacity of the recording / reproducing memory and the feature extracting memory, and music data to be recorded And compress
Compression means for temporarily storing in the recording / reproduction memory, reproduction decompression means for decompressing compressed music data temporarily stored in the recording / reproduction memory, and music decompressed by the reproduction decompression means Reproducing means for reproducing and emitting data; a characteristic extracting decompression means for decompressing the compressed music data temporarily stored in the characteristic extraction memory; and a music data decompressed by the characteristic extraction decompressing means. A feature extraction unit for performing feature extraction; and a feature parameter list, which is a list of features previously extracted from music data recorded on the disk-shaped recording medium, is read out via the drive and extracted by the feature extraction unit. A feature parameter for adding a feature parameter of music data and recording a feature parameter list on a disc-shaped recording medium via the drive. List updating means, input means for a user to instruct search conditions or operations of music data, display means for displaying search or operation-related data, and a feature parameter list output from the feature parameter list updating means. Searching means for deciding music data to be reproduced based on a search condition by the input means and a reproduction order thereof and giving a command to the drive; and the memory control means comprises a memory for recording / reproducing and a memory for memory for extracting characteristics. Based on the amount, music data for which feature extraction has not yet been performed at the time of recording or playback is read out, and the search means performs not only music data for which feature extraction has already been performed but also playback or recording by the feature extraction means. An information search device for performing a search including music data for which features have been newly extracted. 2. A drive for reading or writing at least music data from / to a disk-shaped recording medium, and temporarily storing compressed music data read by the drive at the time of reproduction, and a disk via the drive at the time of recording. A memory for temporarily storing compressed music data for writing on the shape recording medium; a compression unit for compressing the music data to be recorded and temporarily storing the music data in the memory;
Decompression means for decompressing the compressed music data temporarily stored in the memory; reproduction means for reproducing and emitting the music data decompressed by the decompression means; and a user instructing a search or operation of the music data. Input means for performing search, display means for displaying search and operation-related data,
Search means for determining music data to be played back and a playback order based on a feature parameter list and operation history read from the disk-shaped recording medium via the drive and a user operation by the input means; Operating history updating means for updating the operation history based on the output of the means and recording the operation history on a disk-shaped recording medium via a drive, wherein the search means records the operation history on the disk-shaped recording medium by the operation history updating means. An information retrieval apparatus characterized in that it can be used in the next retrieval. 3. The operation history recorded by the operation history updating means is at least one of a search condition formula, a number of times of reproduction, a reproduction date and time, a reproduction time, and a bookmark inputted to the retrieval means by the input means. 3. The information retrieval apparatus according to claim 2, wherein: