KR20020085351A - Portable mpeg player - Google Patents

Abstract

The present invention relates to a portable MPEG player, comprising: a player for reproducing an acoustic file of MPEG standard; The player includes a CPU 1 having a drive control program, a power supply control unit 2 and a power source, an external memory 10 mounted on the CPU 1 by inserting slots from the outside of the player capable of reading data, and the player. Reads the MPEG data input from the external memory 10 and the I / O control unit 20 for data connection with the key operation switch SW installed outside the casing C and the display D for indicating the operation state. For sound generation, the decoder IC 21 for decoding MPEG data and the MPEG data decoded by the decoder IC 21 are reproduced by the earphone E through the digital-to-analog converter 22 and the amplifier 23. It characterized in that it comprises a sound generating unit (S) to;

The improved portable MPEG player of the present invention can provide a device capable of reproducing a voice compressed file such as an MPEG file such as MP3 using an external memory for reproduction only, in a very inexpensive and compact form.

Description

Portable M. blood. this. Player {Portable MPEG player}

The present invention relates to an improved portable MPEG player, and more particularly, to the provision of a device suitable for playing a standardized MPEG file.

Recently, sound source files of various standards have been formed, and among them, MPEG sound source files are widely used because of their high compression ratio and reproducibility. In addition, various kinds of devices for reproducing such MPEG files have been developed as players.

It is well known that the conventional regenerator includes a number of registered technologies, such as Korean Patent Publication No. 1998-4714, both at home and abroad.

In the conventional seaman's system, most of the components of the seaman are configured to download MPEG files from a personal computer, store them in an internal memory, and play them sequentially or out of sequence. The configuration method is disclosed.

However, it has been found that the MPEG player in the case of the above scheme has a number of problems as follows.

(1) The above-mentioned source configuration and the configuration of a number of conventionally filed MPEG players both take a compressed MPEG file such as a music file from an external data bank such as a personal computer and store it in an internal nonvolatile memory. As a result, a lot of hardware design must be devoted to the control and configuration of the interface unit with the personal computer, so that the cost of the player increases.

(2) In addition, since non-volatile memory such as relatively expensive flash memory must be used as a repetitive storage means, it tends to be an expensive device which is generally a burden for widespread use.

(3) The control of the nonvolatile memory and the logic configuration in accordance with the control method are also complicated, requiring a separate memory or a central control unit (C.P.U.) incorporating the control software, which naturally encourages the complexity and expensiveness of the circuit.

In recent years, nonvolatile memories have been mass-produced at low cost, and the technology for mounting these memories has also been greatly improved, making it possible to easily construct cardized memory chips.

In addition, the method of downloading and using MPEG files in personal computers has a problem that is difficult to activate anymore due to the majority of judgments and copyright holders, and there is a tendency to purchase MPEG files for a certain price. The trend is taken for granted in terms of copyright protection.

Therefore, a device for reproducing such MPEG files using a nonvolatile memory is required as a card type media which is not degraded in sound quality compared to a media such as a conventional compact disc, and which is inexpensive in production cost and extremely easy to carry and store. have.

The portable MPEG player of the present invention, in view of the problems of the conventional portable MPEG player described above, removes a large part of the I / O interface, thereby simplifying internal volatile memory and control unit, and selecting a relatively inexpensive CPU. It is an object of the present invention to provide an MPEG player for reconstruction that is extremely inexpensive and easy to distribute and to simultaneously develop the solution.

1 is a block diagram showing the overall configuration of a portable MPEG player of the present invention.

Fig. 2 is a flowchart showing operation control of the portable MPEG player of the present invention.

Fig. 3 is a flowchart showing operation control of the portable MPEG player of the present invention.

4 is a perspective view showing the structure of the portable MPEG player of the present invention and the structure of the non-volatile card media used therein.

Explanation of symbols on the main parts of the drawings

1: C.P.U.

2: power control unit

3: battery

4: adapter power

10: external memory

P: MPEG Player

SW: key operation switch

D: display

The improved portable MPEG player of the present invention to achieve the above object; In constructing a player for playing sound files of the MPEG standard;

The player includes a CPU having a drive control program, a power control unit and a power supply, an external memory mounted by a method of inserting a slot from the outside of the player that is connected to the CPU, and a key operation switch installed in the casing of the player. I / O controller,

Decoder IC for decoding MPEG data to read the MPEG data from the external memory, and a sound generator for reproducing the audio compression data decoded by the decoder IC through a digital-to-analog converter and an amplifier through an earphone, etc. Characterized in that.

Another structural feature of the portable MPEG player of the present invention is;

CPU with drive control program, power control unit 2 and power supply, external memory mounted by inserting slot from outside of player connected to data with CPU, key operation switch installed outside casing of player, and instructing operation state An I / O control unit for data connection with a display, a decoder IC for decoding MPEG data for reading sound from MPEG data from the external memory, and audio compression data such as MPEG data decoded in the decoder IC. A sound generator for reproducing to an earphone or the like via a digital-analog converter and an amplifier;

When power is supplied to the CPU, all devices are initialized, the operation state of the key operation switch is checked, the operation mode by the key operation switch is checked, and when the key operation switch is stopped, the key operation switch is checked again. If PLAY, play the song of the current pointer. If FF, increase or decrease the position of the pointer. If it is REW, decrease the position of the pointer. If there is no key operation, transfer MP3 data to the decoder IC for standby.

The operation loop is circulated again and the loop continues to the confirmation mode of the operation mode by the key operation switch. If the key operation switch is PLAY and the operation mode is PLAY, the user selects ROCK, CLASSI.C., POP. Set the sound range and effects, etc.,

If the current volume value is over the maximum value through the volume operation (VR-UP), set the volume value to the maximum value. If the maximum value is less than the maximum value, allow the volume to increase by the operation, and perform the volume operation (VR-DOWN) If the volume value is below the minimum value, set the volume value to the minimum value. If the volume value is above the minimum value, set the volume operation by allowing the volume to be reduced by manipulating the volume value.

The F.F operation increases the position of the pointer to play the next song, and the REW operation includes a routine to decrease the position of the pointer to play the previous song.

The construction and operation of the improved portable MPEG player of the present invention will be described in more detail together with the accompanying drawings.

1 is a block diagram showing the overall configuration of a portable MPEG player of the present invention, FIG. 2 is a flowchart showing the operation control of the portable MPEG player of the present invention, and FIG. 3 is the operation control of the portable MPEG player of the present invention. 4 is a perspective view showing the structure of the portable MPEG player of the present invention and the structure of media as an external memory used therein.

The improved portable MPEG player of the present invention is based on the premise that the media to be reproduced is produced and supplied as a nonvolatile memory by a manufacturer such as a record label.

That is, as shown in Fig. 4, the label J of the singer or musician is sold in a label such as a conventional record or a compact disk, and the user of the portable MPEG player of the present invention is supplied in such a jacket form. Therefore, an apparatus for reproducing a nonvolatile memory as a medium for recording MPEG files is used. This will be described later in more detail.

A hardware configuration of the portable MPEG player of the present invention as shown in FIG. 1 will be described.

The hardware configuration of FIG. 1 mounted as a circuit board in a casing C of a conventional MPEG player P is as follows;

The CPU 1, which is a central control unit for storing the most simplified control program, is mounted. The CPU 1 is supplied with a battery 3 or an external adapter power source 4 via a normal power control unit 2, and driven. do.

C.P.U. (1) is connected to a nonvolatile external memory 10, which will be described later, which is freely attached and detached by a detachable slot or port, thereby interlocking with the control of C.P.U. (1).

The CPU 1 has data with various displays D such as an LCD display, an LED for indicating an operation state, and a key operation switch SW composed of a conventional membrane switch and an operation button installed on the casing C. I / O control unit 20 for the connection,

Under the control of C.P.U. (1), it has a sound generating unit S for generating sound by reading compressed data such as MP3 foil which is MPEG data from the external memory 10.

The sound generator S has a decoder IC 21 for decoding MPEG data, and the MPEG data decoded by the decoder IC 21 is again passed through the digital-to-analog converter 22 and the amplifier 23 and the earphone E ), A device dedicated to the reproduction of MPEG data as a configuration connected to a built-in or external speaker.

A control method as software mounted on C.P.U. (1) in a portable MPEG player having the above-described configuration will be described.

When power is applied to C.P.U. (1) (100), initialization of all devices is made (101), and the operation state of the key operation switch (SW) is checked (102),

If the operation mode by the key operation switch SW is checked (103), and if the key operation switch SW is STOP, the key operation switch SW is checked 201 again and if it is PLAY, the current pointer portion is checked. Play the song (202),

If F.F, the position of the pointer is increased or decreased (203). If it is REW, the position of the pointer is decreased (204). If there is no key operation, the MP3 data is transferred (205) to the decoder I.C.

This operation loop is circulated again and repeatedly loops to the confirmation 103 mode of the operation mode by the key operation switch SW to be in a standby state.

If the key operation switch (SW) is PLAY (301), and the operation mode is PLAY, the user sets the sound range and effects of ROCK, CLASSI.C., POP, etc. (302),

If the current volume value is greater than or equal to 310 by the volume operation (VR-UP), the volume value is set to the maximum value (312), and if the volume is less than or equal to the maximum value, the volume is allowed to be increased by the operation (311).

In addition, if the current volume value is below the minimum value (320) by setting the volume operation (VR-DOWN), the volume value is set to the minimum value (322). Will be set.

If the F.F operation is performed, the position of the pointer is increased to play the next song (330). If the REW operation is performed, the position of the pointer is decreased to play the previous song (340).

When the key input signal is input by operating the key operation switch SW during normal play, as shown in FIG.

By setting the time interrupt 400 as the disable 401, the key state is inputted and stored (402), and the environment variable is reset (403). In this state, the time interrupt is again enabled 404 to continuously check whether there is a time interrupt in a certain time unit, for example, 1/100 second.

Of course, the above-described control configuration may be configured with various other modes.

4 shows an example of configuring a portable MPEG player of the present invention.

As shown in the figure, if the MPEG player P can be configured very compactly, it is an external memory device for exclusive use such as a device for data transfer with a personal computer, an internal storage memory can be removed, and a CPU can be minimized. By using (10), it can be configured in an extremely thin plate shape at low cost.

The MPEG player P having such a configuration includes a key operation switch SW, a display D, and earphones, and is equipped with a slot S into which the external memory 10 can be inserted.

The external memory 10 is preferably copyrighted in a record label or the like, and stores data such as music having such contents and is sold like a jacket J of a normal musician.

As shown in the figure, the jacket J may be packaged by accommodating the external memory 10 without damage. More preferably, the jacket J has a cover CJ and a receiving groove JP. It is preferable to print and disseminate as the title T.

This type of external memory 10 also has the advantage that it can be configured very inexpensively using a volatile memory for a special purpose or a non-volatile memory that is very small in size compared to a conventional compact disk.

In addition, since the portable MPEG player of the present invention is distributed in cooperation with the external memory 10 as described above, it has the advantage of eliminating the problem of conventional copyright application and making it extremely portable and inexpensive. .

This is an advantage of greatly reducing the peripheral device compared to the configuration having an interface with a conventional internal memory, a control device, and a personal computer.

The improved portable MPEG player of the present invention as described above provides a device capable of reproducing MPEG files such as MP3 using a nonvolatile external memory for reproduction only.

Claims (6)

In constructing a player for playing sound files of the MPEG standard; The player has a drive control program C.P.U. (1), A power supply control unit 2 and a power supply, External memory 10 is mounted by inserting a slot or the like from the outside of the player that is connected to the data C.P.U. (1), Key operation switch (SW) installed outside the casing (C) of the player, I / O control unit 20 for data connection, Decoder IC 21 for decoding MPEG data to read MPEG data which is from the external memory 10 and to generate sound, and MPEG data decoded by the decoder IC 21 to digital-to-analog converter 22 and an amplifier. A portable MPEG player comprising a sound generating unit (S) for reproducing with earphone (E) or the like via (23). The portable MPEG player according to claim 1, wherein the slot-mounted external memory (10) can be volatile and nonvolatile memory. The portable MPEG player according to claim 1, wherein the player can further have a display (D) for indicating an operation state of the key operation switch (SW) to the outside. CPU 1 having a drive control program, power supply control unit 2 and power supply, external memory 10 mounted by inserting a slot from the outside of the player connected to the CPU 1 and the casing C outside of the player In order to generate sound by reading the MPEG data input from the external memory 10 and the I / O control unit 20 for data connection with the key operation switch SW installed in the display and the display D for indicating the operation state, A decoder IC 21 for decoding MPEG data, and an acoustic generator for reproducing the MPEG data decoded by the decoder IC 21 through the digital-to-analog converter 22 and the amplifier 23 through the earphone E or the like ( S); When power is applied to the C.P.U. (1) (100), all devices are initialized (101), and the operation state of the key operation switch (SW) is checked (102), If the operation mode by the key operation switch SW is checked (103), if the key operation switch SW is a stop (STOP), the key operation switch SW is checked again (201), and if the PLAY is the song of the current pointer part, Play 202, F.F increases or decreases the position of the pointer (203), REW decreases the position of the pointer (204), and if there is no key operation, transmits MP3 data to the decoder I.C. The operation loop is circulated again and continuously loops to the confirmation 103 mode of the operation mode by the key operation switch SW, and is in a standby state. The key operation switch (SW) is PLAY (301), and the operation mode sets the sound range and effects such as ROCK, CLASSIC, and POP in the PLAY (302), or the volume control (VR-UP) to change the current volume value. If the value is greater than or equal to 310, the volume value is set to the maximum value 312. If the value is less than or equal to the maximum value, the volume is allowed to be increased by operation (311), and the volume operation (VR-DOWN) is performed so that the current volume value is the minimum value. If less than 320, the volume value is set to the minimum value (322), and if more than the minimum value, the volume operation is set by allowing the volume to be reduced by manipulating (321), A F.F portable MPEG player comprising a routine of increasing the position of the pointer to play the next song (330) and a REW operation to decrease the position of the pointer to play the previous song (340). The method of claim 4, wherein When the key input signal is input by operating the key operation switch SW during the PLAY, the time interrupt 400 is set as the disable 401, the key state is inputted (402), and the environment variable is reset (403). And in this state, the time interrupt is again enabled (404) so as to continuously check whether there is a time interrupt in a predetermined unit of time, and the portable MPEG player characterized in that it is sensitive to the input signal of the key operation switch (SW). The method according to claim 1 or 4, The external memory (10) is a portable MPEG player, characterized in that the media that stores the MPEG data sold as a jacket form.