KR20000075404A - Cassette type MP3 player and smart music card - Google Patents

Abstract

PURPOSE: A cassette type MP3 audio play back apparatus and smart music card are provided to play back a compressed (MP3) audio file with a conventional cassette player by storing the MP3 files in a smart card instead of a memory. CONSTITUTION: The cassette type MP3 audio play back apparatus comprises a main body(10) having a general cassette tape shape, a head(20) formed in a space, in which a head(200) of a cassette player is inserted, to contact with the head of the cassette player and serve as a signal input/output portion, a play back switch(30) formed at a side of the head to be switched on/off by the head of the cassette player to inform a play back operation, a memory(40) for storing a compressed audio file, a decoder(50) for decoding the compressed audio file read from the memory, a digital/analog converter(60) for converting a digital signal decoded from the decoder into an analog signal and outputting to the head, an analog/digital converter(70) for converting the analog signal transmitted from the head of the cassette player into a digital signal, and an encoder(80) for encoding a recoding signal input from the analog/digital converter.

Description

Cassette type MP3 player and smart music card

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a playback device for reproducing audio files compressed and stored by a moving picture expert group (MPEG). Particularly, the present invention is applied to a general cassette type player to reproduce audio files. The present invention relates to a cassette-type MPG audio playback device and a memory card for storing compressed audio files and applying the same to the cassette-type MPG audio playback device as described above.

With the development of video compression technology, digital communication, video communication, etc., capable of transmitting and receiving a large amount of video, have been rapidly developed.

One such video compression technology is the MPEG standard, which is becoming an international standard, which continues to evolve, including MPEG Layer 1, MPEG Layer 2, MPEG Layer 3, ... Each standard has its own characteristics in relation to digital TV broadcasting, video and audio, video communication, and still image.

Audio files, commonly referred to as MP3 files, mean that audio files are compressed using the MPEG Layer 3 specification.

The higher the compression rate, the lower the quality of sound, which can be compressed and encoded by dividing the frequency band where the human hearing is sensitive and the relatively high frequency parts that are not sensitive.

As a result, audio loss can be reduced to the maximum in MPEG 3 audio compared to a high compression rate, and thus it is widely used as an audio-related compression technology.

At present, it is possible to simply download down the Internet (Down load) and enjoy digital music using the application of your PC, so that many netizens use MP3 files, which makes it easy to carry them from MP3 file players. MP3 playback devices have emerged.

However, due to intellectual property rights, there is a restriction on supplying MP3 files through the Internet and communication of an information provider (IP), and users must separately purchase a dedicated device for playing expensive MP3 files.

In view of the above problems, the present invention has a main body having the same shape as a cassette tape, and includes an encoder and decoder means for compressed audio files and a storage memory means for compressed audio files. By making it applicable to a general cassette player, it is possible to easily listen to digital audio using only a general cassette player.

By storing the compressed audio file in a smart card of a normal credit card size instead of storing memory means of the compressed audio file, and inserting the stored smart card into an external body of a cassette type to apply to a general cassette playback device to enjoy digital music, It is possible to replace the sound source file and solve the copyright problem.

1 is a perspective view showing an external structure of a first embodiment of a cassette-type MPEG audio playback apparatus of the present invention.

Figure 2 is a block diagram showing the configuration inside the main body of the first embodiment of the present invention.

Figure 3 is a perspective view showing the external structure of the second embodiment of the present invention.

Figure 4 is a block diagram showing the configuration inside the main body of the second embodiment of the present invention.

The present invention has an external body shape conforming to a general cassette tape standard, and includes memory means for storing compressed audio files therein, decoding means for compressing and compressing compressed audio files stored in the memory means, and encoding means for signal input from the outside. An input / output means for a signal from a cassette player for a signal from an encoding or decoding means is configured, so that the compressed audio file can be reproduced using the cassette player.

In the present invention having such a feature, the accompanying drawings, Figures 1 and 2 as a first embodiment of the present invention, characterized in that it includes a memory means and a processing means of the compressed audio file inside the main body,

The configuration has a shape of an outer main body 10 conforming to a general cassette tape standard, and is formed in the main body 10 in a space into which the head 200 of the cassette player is inserted during regeneration. The head 20 which acts as a signal input / output means by contacting the head 200 of the cassette player, and the head 200 of the cassette player, which is configured on one side of the cassette player, moves forward and contacts the head 20. A playback switch 30 for switching on and informing the playback operation, a memory unit 40 for storing the compressed audio file, and a decoder unit for decoding the compressed coded audio file read from the memory unit 40 ( 50), a D / A converter 60 for converting the decoded digital signal from the decoder 50 into an analog signal and outputting the analog signal to the head 20, and to the head 200 of the cassette player during a recording operation. Analog signal from digital signal An A / D converter 70 for converting the signal to an encoder, an encoder 80 for encoding and compressing a recorded signal input from the A / D converter 70, and one side of a reel 11 that rotates. It is configured to, and configured on one side of the reel 12, the fast-winding sensor unit 90 for detecting the fast-winding (FF) operation by determining the rotational speed of the reel (11), A rewind sensor unit 100 for determining a rotation speed and detecting a rew operation, and an anti-degger lug of a cassette configured at a position corresponding to the anti-erase prevention lug detection lever (not shown) of the cassette player. It is formed, through the recording sensor unit 110, the playback switch 30 and the respective sensor unit (90, 100, 110) to detect the force applied by the anti-orderer prevention lug detection lever of the cassette player to determine the recording operation progress Determine the user's desired operation, and appends to the memory unit 40 according to the determined result A control unit 120 for progressively controlling operations such as reading, reading, and encoding the encoded audio file in the memory unit 40 in the memory unit 40, determining the portion to be read out through fast forward, rewinding, and the like. The main body 10 is configured to be detachable from the battery (battery), it is configured to include a power supply unit 130 for supplying power to the respective parts under the control of the control unit 120 the voltage supplied from the battery. .

The first embodiment of the present invention, which has such a configuration, has a cassette-shaped main body 10 and is mounted on a general cassette player so that the compressed audio file stored in the memory unit 40 mounted therein can be reproduced. In that characterized by

When mounted to the cassette player, the head 20 is formed as shown in FIG. 1 on the space into which the head 200 of the cassette player is put in the regeneration operation.

On one side of the head 20, a regeneration switch 30 is configured to determine a state in which the head 200 of the cassette player is advanced in advance, and the regeneration switch 30 is the head 200 of the cassette player. When advancing to contact the head 20, the switch-on operation to inform the control unit 120.

As the reproduction switch 30 is turned on, the control unit 120 reads the compressed audio file stored in the memory unit 40 by determining that the reproduction operation is started.

After that, the compressed audio file read in this way is encoded, that is, coded, and thus decoded according to a file format determined by the decoder unit 50.

Since the signal decoded through the decoder 50 is a digital signal, it is converted into an analog signal through the D / A converter 60 to output the same, and the converted signal is transmitted to the head 20. .

The head 20 converts the analog signal into a magnetic signal during the reproducing operation so that the head 200 of the cassette player can read it.

Thereafter, the head 200 of the cassette player outputs audio to the outside through an output means such as a speaker or earphone through the same operation as that of a general cassette tape.

That is, from the standpoint of the cassette player, only the data read from the head 20 is read, and the same signal as the magnetic signal read from the cassette tape is read in the same operation.

The control unit 120 repeatedly plays the audio files stored in the memory unit 40 in order until there is any control instruction.

Thereafter, when the head 200 of the cassette player is separated from the head 20 by the operation of the stop button or the like, the regeneration switch 30 is turned off, thereby recognizing the control unit 120 and stopping the reproducing operation.

In addition, when the user performs fast forward or rewind in order to find a desired song, in the present embodiment, the rotational speed of the reels 11 and 12 is sensed to determine the user's request.

In the case of a general cassette tape, both sides of the take-up reel and the supply reel are connected by the tape, and both reels 11 and 12 rotate along the reel. Since the tapes are not wound on (11, 12), only the reel (11 or 12) on one side rotates when the fast forward or rewind operation is performed.

When the user fast forwards the cassette player rotates the reel 11, if the rewind proceeds to rotate the reel 12,

At this time, since the rotational speed is made faster than the regeneration operation, the fast forward sensor unit 90 or the rewind sensor unit 100 configured on one side of the reels 11 and 12 recognizes this and informs the controller 120. do.

The control unit 120 receives a signal from the fast-forwarding sensor unit 90 or the rewinding sensor unit 100 to set a playback operation time point of a file stored in the memory unit 40.

Since the compressed audio file, which is an actual digital signal, can be jumped for each file, there is no need for fast forwarding and rewinding. However, since the compressed audio file is used for an actual general cassette player, the control unit 120 controls the user to fast forward or rewind. Based on the execution time, one song (one file) is moved every fixed time (about 3 seconds).

Then, when the user selects the record button, the head 200 of the cassette player is moved forward, and at the same time, the anti-deletion lug detection lever for determining whether there is a tab in the anti-deletion lug of the cassette tape is advanced. As committed

In this embodiment, the recording operation is determined by using the anti-erase lug detection lever.

By configuring the recording sensor unit 110, which is a piezoelectric sensor, at a position corresponding to the anti-overlaying lug of the cassette tape, the controller 120 recognizes the force applied by the recording recognition terminal and informs the controller 120 of the recording sensor unit 110. ) Determines the recording mode by determining the detection signal.

That is, even if the playback switch 30 is turned on, the control unit 120 determines that the recording operation is performed without determining the playback operation when the recognition signal is input from the recording sensor unit 110.

When it is determined in the recording mode as described above, the controller 120 controls the head 20 to convert the magnetic signal input from the head 200 of the cassette player into an electrical signal, and the A / D converter 70 To convert the digital signal.

Thereafter, the digital audio signal converted as described above is encoded and compressed through the encoder 80 to store the converted digital audio signal in the memory 40.

The compressed digital audio signal as described above is stored in the memory unit 40.

At this time, the reel of the cassette is rotated and the general operation is performed by the power provided from the cassette player, and the power supply unit 130 supplies only the operation power of each sub-circuit in the cassette main body 10, and the playback switch ( 30) or only when there is an input signal from each of the sensor units 90, 100, and 110, the power is supplied under the control of the controller 120, and thus the battery used in the power supply unit 130 does not need a large capacity.

The first embodiment of the present invention is to provide an MP3 player having a general cassette shape, and the digital audio file can be simply reproduced using the general operation function of the cassette player.

3 and 4 show a second embodiment of the present invention,

The second embodiment of the present invention is characterized in that the internal memory section 40 in the first embodiment is configured as an external memory means by using a smart card. The same parts as in the first embodiment are the same. The construction of the code is described below.

The second embodiment of the present invention has a smart music card 300 that conforms to a credit card size standard and stores compressed audio files, and has an external main body 10 shape that conforms to a standard cassette tape. The card mounting portion 13 for mounting the smart music card is configured in front of,

The smart music card 300 has a reel ball formed at a position corresponding to a hole position of the data input / output terminal 301 and the reels 11 and 12 of the memory formed on the rear of the built-in memory and mounted state therein ( 302, a defective portion 303 having a predetermined shape formed at a corresponding position in consideration of the formed position of the head 20, and an anti-deletion hole 304 for preventing the erasing of the internal memory is formed. .

The card mounting unit 13 contacts the data input / output terminal 301 formed on the smart music card 300 to read data from the internal memory of the smart music card 300 or to store the data. 13a, the cover portion 13b which is covered with the upper portion of the smart music card 300, and the position of the anti-deletion hole 304 on the mounting surface of the smart music card 300. Is formed in the position is configured to include a mis-preventing sensor unit 13c for detecting the state of the anti-erasing hole 304 to determine whether recording is possible.

In the main body 10, a head 20 is formed on a space into which the head 200 of the cassette player is input during the reproducing operation, and contacts the head 200 of the cassette player to be inserted into the main body 10 and serves as a signal input / output means. And the head 200 of the cassette player is advanced and input, and when the head 200 of the cassette player is in contact with the head 20, the switching switch 30 switches on and notifies the reproducing operation, and the memory unit 40 stores the compressed audio file. ), A decoder unit 50 for decoding the compressed coded audio file read from the memory unit 40, and a digital signal decoded from the decoder unit 50 is converted into an analog signal and output to the head 20. A D / A converter 60, an A / D converter 70 for converting an analog signal transmitted from the head of the cassette player 200 into a digital signal during a recording operation, and an A / D converter 70 Encoder to encode and compress the recording signal input from 80 and one side of the rotating reel (11), the fast-winding sensor unit 90 for detecting the fast-winding operation by determining the rotational speed of the reel (11), and the rotating reel (12) And a rewind sensor unit 100 for detecting the rewind operation by determining the rotational speed of the reel 12, and corresponding to an anti-overlay lug detection lever (not shown) of the cassette player. A recording sensor unit 110 formed at a position of the anti-overlay lug portion configured at a position, for detecting a force applied by the anti-overlay lug detection lever of the cassette player to determine that the recording operation is in progress, and the regeneration switch 30. And determining the operation desired by the user through the sensor units 90, 100, 110, and 13c, and reading and encoding the audio file compressed and stored from the memory unit 40 to the memory unit 40 according to the determined result. Save, fast-forward, rewind And control proceeds to the operation such as retrieval of the determination part to start control unit 120,

The main body 10 is configured to be detachable from the battery, and is configured to include a power supply unit 130 for supplying power to the respective parts under the control of the control unit 120 to the voltage supplied from the battery.

As described above, the second embodiment of the present invention uses a smart music card 300 having a credit card size having a built-in memory as an external memory means, and uses the smart music card 300 as a cassette main body. 10) so that the digital data can be played back.

As shown in FIG. 4, the smart music card 300 follows a credit card size standard of R = 3.18 ± 0.30 mm in a corner of 85.60 mm in width and 53.98 mm in length, and internally includes a flash memory; 32MB).

Therefore, a card mounting portion 13 having a mounting surface corresponding to the size of the smart music card 300 is formed on the front surface of the cassette main body 10 such that the smart music card 300 can be placed thereon. .

When the smart music card 300 is mounted in the card mounting unit 13, the contact terminal 13a is formed at a position corresponding to the data input / output terminal 301 of the smart music card 300, thereby providing the smart music card 300. When mounted, the data input / output terminal 301 of the smart music card 300 and the contact terminal 13a of the card mounting unit 13 are maintained in contact with each other.

At this time, the smart music card 300 has a reel hole 302 is formed in accordance with the shape and position of the reel (11, 12) of the cassette, the defect portion 303 in accordance with the formation position of the head 20 formed in the forward portion Is formed.

When such a smart music card 300 is placed on the card mounting portion 13 and covers the cover portion 13b, it becomes a usable cassette state. As described above, the smart music card 300 may be put into an ordinary cassette player and operated.

As described in the first embodiment, the operation is performed to determine whether to play back as the head 200 of the cassette player is advanced, and to determine the fast forward or rewind mode by determining the speeds of the reels 11 and 12. Then, whether the recording mode is determined through the recording sensor unit 110 to control the operation of the control unit 120.

However, in the second embodiment of the present invention, the smart music card 300 is formed with an anti-destructive hole 304 for determining whether recording is possible at a predetermined position, and the card mounting portion 13 corresponding to the position thereof. At the corresponding position, an anti-erasing sensor unit 13c is formed, and thus it is possible to determine whether recording is possible for each smart music card 300.

If it is determined that the recording mode, the control unit 120 recognizes the input signal of the anti-erasing sensor unit 13c to determine whether the card is capable of recording, and proceeds to the subsequent recording mode.

At this time, the anti-erasing sensor unit 13c can detect the state of the anti-erasing hole 304 by using a means such as a photo coupler. The state may be maintained or prevented by using a tape or the like to prevent the erasure of the smart music card 300.

The setting may be changed by the program of the controller 120, but in general, when the anti-erasing prevention hole 304 is blocked, recording is impossible.

Therefore, it is possible to prevent the loss of the internal memory data of the smart music card 300 due to a user mistake.

Here, the smart music card 300 may be applied to a general compressed audio-only player having such a standard, and may be variously applied, such as being able to download and store through an application program with an PC or an internal application program.

Unlike the first embodiment, since the second embodiment can sell only the smart music card 300 containing only audio data, the second embodiment can be used by applying the smart music card 300 to a general cassette player. When the cassette body 10 of the second embodiment is purchased once, only the smart music card 300 containing the desired audio files can be purchased and used continuously, thereby providing a low-cost MP3 player that is easy for the user.

As described above, by simply playing a compressed audio file (MP3) using a general cassette player, it is possible to provide high quality digital audio to a user at a simple cost without any additional purchase cost to purchase a player. It works.

In addition, since only the smart music card is sold, the user can easily provide digital audio, thereby managing intellectual property rights.

Claims (7)

It has a shape of an external main body 10 conforming to a general cassette tape standard, and is formed in the main body 10 in a space into which the head 200 of the cassette player is inserted during a playback operation. The head 20 which acts as a signal input / output means in contact with the head 200 of the cassette player, and the head 200 of the cassette player, which is configured on one side of the head 20, is advanced and is brought into contact with the head 20. A playback switch 30 for switching on and informing the playback operation, a memory unit 40 for storing the compressed audio file, and a decoder unit for decoding the compressed coded audio file read from the memory unit 40 ( 50), a D / A converter 60 for converting the decoded digital signal from the decoder 50 into an analog signal and outputting the analog signal to the head 20, and to the head 200 of the cassette player during a recording operation. Analog signal transmitted from digital scene A / D conversion section 70 for converting the signal to a digital conversion, an encoder unit 80 for encoding and compressing a recorded signal input from the A / D conversion section 70, and an anti-destructive lug detection lever of a cassette player (Fig. And a recording sensor unit 110 formed at a location of the anti-erasing lug formed at a position corresponding to the recording sensor unit 110 to detect the force applied by the anti-erasing lug detection lever of the cassette player to determine that the recording operation is in progress. Determining an operation desired by the user through the playback switch 30 and the recording sensor unit 110, and reading and encoded audio of the compressed and stored audio file from the memory unit 40 according to the determined result. The controller 120 is configured to control operation of storing a file in the memory unit 40 and the like, and a battery may be attached or detached to an external surface of the main body 10. 120 each under the control of Cassette-type MPG (MP3) audio reproducing apparatus, characterized by comprising a power supply unit 130 for supplying power to the unit. Built-in memory inside, the data input / output terminal 301 of the memory formed on the rear surface, the reel hole 302 formed at a position corresponding to the hole of the general cassette player reels 11, 12, and playback or recording It characterized in that it comprises a missing portion 303 of a predetermined shape formed at a position corresponding to the position of the head 20 of the cassette-type MPG audio reproducing apparatus in contact with the head 200 is introduced into the cassette player in the forward mode Smart Music Card. The smart music card according to claim 2, wherein an anti-erasing hole (304) is formed to prevent the internal memory from erasing. It has a shape of the outer body 10 in accordance with the specification of the tape of the general cassette, the card mounting portion 13 for mounting the smart music card 300 having the structure of claim 2 in front of the body 10 is configured , The card mounting unit 13 is in contact with the data input / output terminal 301 formed on the smart music card 300 to read data from the internal memory of the smart music card 300, or a contact terminal 13a for storing data. And, after mounting the smart music card 300, and comprises a cover portion 13b that is covered with the upper portion, In the main body 10, the head 20 is formed on a space into which the head of the cassette player 200 is inserted during the reproducing operation, and is in contact with the head 200 of the cassette player to be inserted and serves as a signal input / output means. When the head 200 of the cassette player is advanced and input, and comes into contact with the head 20, the compression switch audio read from the smart music card 300 and the playback switch 30 for switching on and informing the playback operation. A decoder 50 for decoding a file, a D / A converter 60 for converting a digital signal decoded from the decoder 50 into an analog signal and outputting the analog signal to the head 20, and the reproduction switch ( The controller 120 determines the playback mode according to the state of the control unit 30, reads the compressed and stored audio file from the smart music card 300, outputs the audio file to the decoder unit 50, and controls the playback mode. ) So that the battery can be attached or detached Castle is, a voltage supplied from the battery under the control of the control unit 120 a cassette type BMP not (MP3) audio reproduction device, characterized by configured to include a power supply 130 for supplying power to the parts. 5. A force according to claim 4, wherein the force is applied to the anti-deletion lug detection lever formed at a position corresponding to the anti-deletion lug detection lever (not shown) of the cassette player, and applied by the anti-erase lug detection lever of the cassette player. And recording sensor unit 110 for determining the recording operation mode to detect the; Inside the main body 10, input from the A / D conversion unit 70 and the A / D conversion unit 70 for converting the analog signal transmitted from the head 200 of the cassette player to a digital signal in the recording mode And an encoder unit 80 which encodes and compresses the recorded recording signal, and determines the recording mode in the control unit 120 and mounts the input audio file compressed through the encoder unit 80. A cassette-type MP3 audio playback apparatus, characterized in that data is stored in a 300). The method according to claim 5, wherein when the smart music card 300 is equipped with an orouser-sensing part 13c for detecting the state of the orous-proofing hole 304 formed in the smart music card 300, The cassette type MPG audio playback device, characterized in that formed in the corresponding position so that the control unit 120 determines whether or not the smart music card (300) can be recorded. The method according to any one of claims 1 or 4 to 6, Is configured on one side of the reel (11) to rotate, the fast-winding sensor unit 90 for detecting the fast forward (FF) operation by determining the rotational speed of the reel (11), and the reel (12) to rotate Is configured on one side of, further comprises a rewind sensor unit 100 for detecting the rewind (REW) operation by determining the rotational speed of the reel 12, A cassette type MP3 audio playback device, characterized in that the control unit 120 selects and controls the fast-forward (FF) or rewind (REW) mode.