KR100457862B1 - System for playing by repeating phrase in the cd-player and method for controlling the same - Google Patents

Abstract

The present invention relates to a system of repeated passage playback in a compact disc player and a method of controlling the same. A method for repetition of passages in a compact disc player according to the present invention comprises the steps of: reading audio data from an audio compact disc in which a section-specific division signal is added between each passage for each audio track and outputting an EFM signal; Demodulating the EFM signal with a digital signal processor to generate digital audio data; And when a section end signal is detected from the demodulated digital audio data, compares with the section repeat playback setting state value set from an input / output interface, and returns to the end data of the previous section only when section repeat playback is set. Repeatedly playing; characterized in that to proceed. According to the present invention, when practicing a song, by repeatedly practicing a predetermined section through the section repeat function, it is possible to increase the efficiency in practicing the song.

Description

Section repeat playback system in compact disc player and method of controlling the same {SYSTEM FOR PLAYING BY REPEATING PHRASE IN THE CD-PLAYER AND METHOD FOR CONTROLLING THE SAME}

The present invention relates to a system for repetition of passages in a compact disc player, and more particularly, by adding a division signal of each section between audio passages for each audio track in an audio compact disc, and selecting the player based on the passage classification signal. The present invention relates to a system for repeating a passage of a passage in a compact disc player which repeatedly plays a predetermined passage according to a setting.

In general, a compact disc (CD) is a digital recording of a voice, etc., on a transparent plastic disc using a pulse code modulation (PCM) method using a laser. Detect the signal. Such a record or player for a CD is called a CDP.

Basically, a digital file that can be played with a digital audio player contains only information about voice and music. The digital audio data is composed of a minimum unit whose bit string is called a frame (or an audio access unit).

When reproducing such digital audio data, the user can set the repetition section arbitrarily and replay it. That is, repeat playback by setting a repeating section from an arbitrary point of the digital audio data to be reproduced to another arbitrary point.

When repeating playback using digital audio, a user has to inconvenience or have to select or find a desired part precisely. In particular, an audio player user inputs a start point and an end point of a repeating section by audible judgment and manual manipulation. If the start point and the ending point of the repeating section are inappropriate, a word or a word may be broken.

In this case, the user may feel unpleasant as the user repeatedly listens to unnecessary sounds or incomplete audio, and the repetitive learning effect is halved.

In particular, if you want to practice singing through a general digital audio player, and if you want to practice repeating a particular measure as a common method in general singing practice, the repeat function of the conventional digital audio player is extremely short. Only the repeat function is supported, so you can't play the part you want, but you have to rewind it manually and play it again. Further, even in the case of repeated playback by the manual method as described above, it is not easy to accurately find the desired part.

Accordingly, a technical problem of the present invention is to record a section classification signal between music sections of a predetermined track of audio data stored in an audio digital compact disc, and select the section classification signal when the section repetition function is selected during playback of the audio data. There is provided a system for repeating passages of a passage in a compact disc player which repeatedly reproduces the passage by detecting.

Another object of the present invention is to provide a method for repetition of passages in the compact disc player.

1 is a view showing the configuration of an audio compact disc in which section end information is inserted into track information according to the present invention.

2 is a block diagram of a section repeat playback system according to the present invention.

3 is a block diagram of a compact disk player (CDP) module according to the prior art.

4 is a flowchart illustrating a method of repetition of passages according to an embodiment of the present invention.

5 is a diagram illustrating a screen display unit of a compact disc player according to an exemplary embodiment of the present invention.

According to one aspect of the present invention for achieving the above technical problem, a section repeat playback system in a compact disc player transmits a section repeat playback signal for controlling the operation of a compact disk player, or outputs a playback section display signal. / Output interface; CDP module that outputs EFM (Eight to Fourteen Modulation) signal by mechanically controlling the audio data and the passage-end signal from the recorded audio compact disc by adding section-specific division signals for each audio track. ; A digital signal processor for demodulating the EFM signal generated from the CDP module to generate first digital audio data and an error correction parity; A digital / analog converter for converting digital audio data output from the digital signal processor into an analog audio signal; A section repeating processing module for inspecting the digital audio data detected by the digital signal processor and transmitting a section ending signal to a microprocessor when a section ending signal is detected; And control compression, storage, and output of data provided from the audio compact disc, and when a section termination signal is received from the section repeating processing module, compared with a section repeat playback setting state set from the input / output interface. And a microprocessor that controls to repeat playback of the audio compact disc by returning to the end data of the previous section only when the section repeat playback is set.

In accordance with another aspect of the present invention for achieving the above technical problem, a method of repetitive playback of a section in a compact disc player includes: (a) audio from an audio compact disc in which a section-specific division signal is added between sections and recorded for each audio track; Reading data to output an EFM signal; (b) demodulating the EFM signal with a digital signal processor to generate digital audio data; And (c) when a section end signal is detected from the demodulated digital audio data, and compares with the section repeat playback setting state set from the input / output interface, and returns to the end data of the previous section only when section repeat playback is set. And repeatedly playing the audio data.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. However, the preferred embodiments of the present invention described below are not intended to limit the technical scope of the present invention, but are intended to more clearly and easily describe the present invention to those skilled in the art. Like reference numerals in the drawings refer to like elements.

1 is a view showing the configuration of an audio compact disc in which section end information is inserted into track information according to the present invention.

As shown in Fig. 1, the structure of data used for recording a typical audio compact disc is composed of three parts, an information part called lead-in (not shown) and lead-out (not shown), and data (not shown). It is called 'section 10'. A section is composed of a plurality of tracks 11 to 13, and one or more of the sections 10 together constitute one compact disc. At this time, according to the configuration method of the section or track, there is a separate name, the track can be recorded up to 99 tracks in one media.

The lead-in constituting the section indicates the start position of the data, and also includes information indicating the track address of the data called TOC (Table Of Contents). Then, the readout marks the end of the data. That is, about 15 to 20 MB of capacity is consumed for lead-in and lead-out.

In general, in an audio compact disc, one piece of data is stored in one track (11 to 13), so that the information of each song is divided by the tracks (11 to 13). One track 11 to 13 is divided into a part 20 indicating the start of a track and a part 25 indicating the end of a track, and one piece of audio data information is recorded between the parts.

A song, i.e., one track data, is usually composed of one or more sections 21 to 24. Here, the section refers to eight words in music and is a unit of learning repeatedly during song practice. . Therefore, as a preferred example of the present invention, one piece of music data is divided into sections, and the section classification information is inserted and used as a unit of repeat playback.

Here, it is obvious that the unit for dividing a song can be divided not only into the above verse unit but also two motives, four small passages, and the like.

In order to facilitate the repeated playback in the unit of a section, when the audio data of the compact disc is recorded, the section classification information 21a to 23a is inserted between the section units and recorded, so that the repeated playback of the section unit can be easily realized. . For example, when the playback of the second section 22 is to be repeatedly performed, the section classification information 22a is inserted between the end of the second section 22 and the beginning of the third section 23 to record. Thus, when the section repeat function is set, after the playback 26 of the second section 22 is finished, when the section classification information 22a is detected, the playback returns to the beginning of the second section 22 and reproduces 27 again. Can be implemented.

On the other hand, the method of recording the audio data on the compact disc by inserting the section information between the sections, the compact disc writer (CD-R) when the audio data is recorded by distinguishing the sections from each track information by By recording, it can be easily implemented in software.

2 is a block diagram of a section repeat playback system according to the present invention.

Referring to FIG. 2, the section repeat playback system of the compact disc player according to the present invention is an input / output interface for transmitting a section repeat play signal for controlling the operation of the compact disc player or outputting a playback section display signal ( I / O Interface 40); CDP module that outputs EFM (Eight to Fourteen Modulation) signal by mechanically controlling the audio data and the passage-end signal from the recorded audio compact disc by adding section-specific division signals for each audio track. (CDP Moduel; 30); A digital signal processor (60) for demodulating the EFM signal generated from the CDP module to generate parity for detecting first digital audio data and error correction; A digital / analog converter (70) for converting digital audio data output from the digital signal processor into an analog audio signal; A section repeating processing module (80) for inspecting the digital audio data detected by the digital signal processor and transmitting the section ending signal to a microprocessor when a section ending signal is detected; And control compression, storage, and output of data provided from the audio compact disc, and when a section termination signal is received from the section repeating processing module, compared with a section repeat playback setting state set from the input / output interface. And a microprocessor 50 which controls to replay the audio compact disc repeatedly by returning to the end data of the previous section only when the section repeat playback is set.

When playing an audio CD as in a general CD player, analog audio data read by the CDP module 30 is output in the form of Pulse Code Modulation (PCM) data through the digital signal processor 40. At this time, the output data is sent to the digital-to-analog converter 70 and then passed through an amplifier (not shown), and is converted into a sound that can be heard through a speaker (not shown).

In this case, the PCM data output is transmitted to the section repeat processing module 80 and the data is inspected. When section discrimination information inserted when recording digital audio data is detected in FIG. 1, it means that a predetermined section has been completed. The microprocessor 50 checks whether the current playback mode is the section playback mode.

When the test result is set to the section playback mode, the microprocessor 50 controls the CDP module 30 to rewind to the beginning of the currently finished section. If the passage playback mode is not set, the passage termination information is ignored and playback of the next passage is performed.

3 is a block diagram of a compact disk player (CDP) module according to the prior art.

Referring to FIG. 3, the CDP module 30 includes a spindle motor 32a for rotating the compact disk 31. An optical pickup unit 33 for tracking and reproducing the CD 31 to convert detected light into an electrical signal; A thread motor 32b for transferring the optical pickup unit 33; An analog waveform shaping unit 34 for linear equalization and waveform shaping of the high frequency analog signal detected by the optical pickup unit 33; A synchronization detecting unit 35 for detecting a frame synchronization signal and finding a head position of each frame; A phase locked loop (PLL) 36 for generating a continuous pulse train and supplying the synchronized pulse detector 35 and the digital signal processor 40; A servo unit 38 for controlling tracking and focusing of the optical pickup unit and controlling rotation of the CD; And a drive unit 37 for driving the spindle motor 32a and the thread motor 32b in accordance with the control command of the servo unit, respectively.

The operation of the CDP module according to FIG. 3 is as follows. First, when the spindle motor 32a rotates the CD 31, the optical pickup unit 33 tracks and reproduces the CD 31 to convert the detected light into an electrical signal, and thereby the tracking error signal TE. And a focusing error signal FE. In this case, the optical pickup unit 33 includes a laser diode (not shown), a photodetector (not shown), an objective lens (not shown), and the like.

The thread motor 32b transfers the optical pickup unit 33 so that the CD 31 can be tracked and reproduced, and the analog waveform shaping unit 34 detects the high frequency analog signal detected by the optical pickup unit 33. After amplifying to a predetermined level, DC components and noise are removed, linear equalization, and waveform shaping are performed.

The sync detector 35 detects a frame sync signal among the digital signals and finds a head position of each frame. In this case, the PLL 36 generates a continuous pulse sequence to generate the sync detector 35 and the digital signal processor 40. ) Will be supplied.

The servo unit 38 includes a tracking servo, a focusing servo, and a rotation servo. The servo unit 38 controls the tracking and focusing of the optical pickup and the rotation of the CD 31. The driving unit 37 includes the servo unit ( According to the control command of 38, the spindle motor 32a and the thread motor 32b are respectively driven.

Meanwhile, the digital signal processor 60, the synchronization detector 35, and the servo unit 38 are controlled by the microprocessor 50.

4 is a flowchart illustrating a method of repetition of passages according to an embodiment of the present invention.

As shown in FIG. 4, when the audio track is reproduced from the CD on which the section classification information is recorded (S100), and the n-th section end signal is detected (S110) during playback, the current section repeat mode is turned on. Check whether it is in the OFF state or the OFF state (S120). The selection of the section repeat mode is set via the input / output interface described above with reference to Fig. 2 by external operation of the compact disc player user.

If the section repeat mode is on, it means that the currently played section is to be repeatedly played. Therefore, the end signal of the (n-1) section, that is, the first section of the nth section, is returned to the beginning of the nth section (S130), so that the nth section data is received. Play again (S140).

On the other hand, if the section repeat mode is off, section repeat is not executed. Therefore, the section end signal is ignored and audio data of the (n + 1) section is reproduced (S150).

5 is a diagram illustrating a screen display unit of a compact disc player according to an exemplary embodiment of the present invention.

Referring to FIG. 5, a player 200 that implements a section repeat playback system in the compact disc player may be configured.

Preferably, the status window 210 displaying the current playback state of the audio data can be implemented by a conventional technique, and the information 220 of the track being played and the section information 230 implemented by the present invention can be displayed. have.

Below the status window 210, a record button 240, a play button 250, a stop button 260, a track or section movement button 270, 280 and a section playback mode selection button 290 to allow the user's control. ) May be provided.

As described above, the section playback mode information is transmitted to the microprocessor 50 through the input / output interface 40 by the user's manipulation of the section playback mode selection button 290.

In the above described with reference to the accompanying drawings, preferred embodiments of the present invention in detail. However, the technical idea according to the present invention is not limited thereto, and various modifications or improvements can be made by those skilled in the art.

According to the present invention, when practicing a song, by repeatedly practicing a predetermined section through the phrase repeat function, it is possible to increase the efficiency of practicing a new song, and for those who are not confident in the song, repeating the lacking part of the song By practicing, you can significantly increase your musical capacity.

Claims (2)

In a compact disc player, An input / output interface which transmits a section repeat play signal for controlling the operation of the compact disc player or outputs a play section display signal; CDP module that outputs EFM (Eight to Fourteen Modulation) signal by mechanically controlling the audio data and the passage-end signal from the recorded audio compact disc by adding section-specific division signals for each audio track. ; A digital signal processor for demodulating the EFM signal generated from the CDP module to generate first digital audio data and an error correction parity; A digital / analog converter for converting digital audio data output from the digital signal processor into an analog audio signal; A section repeating processing module for inspecting the digital audio data detected by the digital signal processor and transmitting a section ending signal to a microprocessor when a section ending signal is detected; And Controls compression, storage, and output of data provided from the audio compact disc, and when a section termination signal is received from the section repeat processing module, the section is compared with the section repeat playback setting state set from the input / output interface. And a microprocessor that controls to replay the audio compact disc repeatedly by returning to the end data of the previous section only when the repeat playback is set. delete