KR100855441B1 - Portable multimedia reproducing apparatus - Google Patents

Abstract

A compact, lightweight, portable, multimedia playback device having a card-like structure, comprising: an input / output terminal 609 having a predetermined internal structure, and an audio memory in which the digital audio data compressed in advance is integrally stored in the device. 601, an audio decoder 603 for decoding digital audio data stored in the audio memory 601, and digital input / output terminals 609 by converting the digital audio data decoded by the audio decoder 603 into a standard analog signal. Digital-to-analog converter 604 for outputting through, additional memory 607 storing identification numbers uniquely assigned to the device, MCU 602 for controlling each of these components, and each of these components It includes a rechargeable battery 605 for supplying a driving voltage to.

Audio, video, convert, compression, portable, card, playback, clone

Description

Portable multimedia playback device {PORTABLE MULTIMEDIA REPRODUCING APPARATUS}

1 is a schematic block diagram of a portable multimedia player according to an embodiment of the present invention.

FIG. 2 is a schematic diagram schematically showing an internal configuration of the audio memory shown in FIG.

FIG. 3 is a schematic diagram showing header information corresponding to each memory block of the memory chip shown in FIG. 2; FIG.

4 is a block diagram illustrating a data processing procedure when the portable multimedia player according to the present invention is inserted into an external audio system.

5 is a diagram for explaining data communication between a multimedia player and a peripheral device;

6 is a schematic block diagram of a portable multimedia player according to another embodiment of the present invention.

7 is a schematic block diagram of a portable multimedia playback device according to another embodiment of the present invention.

8 is a schematic block diagram of a portable multimedia playback device according to another embodiment of the present invention.                 

9 is a schematic block diagram of a portable multimedia playback device according to another embodiment of the present invention.

Fig. 10 is a schematic diagram illustrating that data can be downloaded from a communication network using the portable multimedia playback device of the present invention, a dedicated external interface, and a personal computer.

Fig. 11 is a schematic diagram illustrating the downloading of an audio file between a portable multimedia player and a personal computer of the present invention.

<Explanation of symbols for main parts of the drawings>

100, 300, 400, 500, 600: portable multimedia playback device

200: external audio system

110, 401, 601: Audio memory

120, 403, 603: audio decoder

130, 210, 330, 602: MCU

140, 350, 604: Digital-to-Analog Converters (DACs)

310: video memory

320: frame memory

340: video decoder

605: rechargeable battery

607: additional memory

608: control panel                 

610: display

800: the first interface

900: second interface

The present invention relates to a multimedia reproducing apparatus, and more particularly, to a multimedia reproducing apparatus which converts and outputs compressed digital data stored in a memory in the reproducing apparatus as a standard analog signal.

The general tendency of consumers to use audio equipment is to want to listen to the music they want without the cost, ease of use, portability, and time and place. With the rapid development of current semiconductor-related hardware or software technology, such acoustic devices are becoming smaller, lighter and more versatile.

As is well known, digital data can be copied as many times as the original, while analog data can be duplicated, but the quality of the data deteriorates with the increase in the number of copies. There is this. However, with the development of various data compression / decryption techniques, data replication techniques are also gradually advanced, which seriously affects the copyright protection of such digital data. In addition, in a conventional player using a medium such as a CDROM, since digital data stored in the medium can be extracted as it is, data can be copied and spread of the copied data can be adversely affected. Have

Therefore, audio media providers are not only solving the problem of expensive player repurchase due to the development of new compression technology while satisfying the modern consumer's needs, but also the emergence of a new media playback device that can eliminate the concern about data duplication. I'm asking.

Accordingly, an object of the present invention is to provide a portable multimedia playback device which is small in size, light weight, and which can suppress duplication of data by outputting compressed digital multimedia data previously stored in a memory in the playback device as a standard analog signal. Is in.

Another object of the present invention is to provide a communication network through authentication by means of an identification code uniquely assigned to a playback device, using a small, lightweight, thin portable multimedia playback device and a dedicated external interface detachably coupled to the portable multimedia playback device. It is to provide a portable multimedia playback device that can download various multimedia data on the memory in the device.

In order to achieve the above object, according to an embodiment of the present invention, a portable multimedia playback apparatus for playing compressed digital multimedia data, the input and output terminals, a memory in which the compressed digital multimedia data is stored in advance, An operation unit having a plurality of buttons, decoding means for decoding the compressed digital multimedia data, conversion means for converting the digital multimedia data decoded by the decoding means into a standard analog signal and outputting the same through the input / output terminal; There is provided a portable multimedia playback apparatus including control means for controlling the memory, the decoding means and the conversion means, and a power supply means for supplying a driving voltage to the respective means based on a command from the user by the operation unit. .

According to another embodiment of the present invention, a portable multimedia playback apparatus for playing compressed digital multimedia data, comprising: an input / output terminal, an operation unit having a memory in which the compressed digital multimedia data is stored in advance, and a plurality of buttons; Decoding means for decoding the compressed digital multimedia data, conversion means for converting the digital multimedia data decoded by the decoding means into a standard analog signal and outputting the same through the input / output terminal, and based on a command from the user by the operation unit. Control means for controlling the first and second memories, the decoding means and the conversion means, a power supply means for supplying a driving voltage to the respective means, connected to the input / output terminal, and with a personal computer. Portable multimedia with interface for connection A playback device is provided.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a schematic block diagram of a portable multimedia player according to an embodiment of the present invention. As shown in FIG. 1, the portable multimedia player 100 of the present invention includes, for example, an audio memory 110 in which digital audio data compressed with MP3 is stored in advance, and a compression stored in the audio memory 110. For example, an MP3-based audio decoder 120 for decoding the digital audio data, and a digital-to-analog converter (DAC) 140 for converting the digital data decoded by the audio decoder 120 into a standard analog signal and outputting the same. And a microcontroller unit (MCU) 130 that controls each of these components. In the figure, BSS and DCS represent a block selection signal and a decode control signal, respectively, which will be described later.

In the present invention, the audio decoder 203 has been described as being based on MP3. However, the present invention is not limited thereto, and the audio decoder 203 is based on the compression method (for example, WMV, AAC, Bytero compression, etc.) of the audio data stored in the audio memory 110. Of course, it can be variously changed.

The data communication unit 10 uses, for example, a synchronous serial transmission / reception scheme for performing 8-bit data transmission to reduce signal lines for data communication between the portable multimedia player 100 and an external device.

The audio memory 110 is composed of memories such as low-cost mask ROM, EEPROM, EPROM, and one-time programmable (OTP) ROM, and is integrated into the portable multimedia player 100. In the audio memory 110, audio-related digital data is stored in advance by a record provider or a copyright holder.

FIG. 2 is a schematic diagram showing an internal configuration of the audio memory 110 shown in FIG. 1, in which a plurality of memory blocks 12 to 15 each corresponding to one piece of audio data are stored, and N corresponding thereto. Header information (1h to Nh). The capacity of the audio memory 110 may be variously changed within the range that can be accommodated in the portable multimedia playback device 100. In addition, as shown in FIG. 2, the audio memory 110 stores copyright information 11 indicating a logo of a user or a music label provider who has created or has a copyright, the total number of recorded songs, and the like. In addition, the header information 1h to Nh of each of the memory blocks 12 to 15 corresponds to one piece of audio data recorded in each memory block, for example, the memory block 12, as shown in FIG. It contains information such as a song start position 1, a song length 2, a title 3, a singer name 4, and the like.

4 is a block diagram illustrating a data processing process when the portable multimedia player 100 according to the present invention is inserted into an external audio system 200. FIG. 5 is a data communication unit 10 shown in FIG. ) Is a schematic diagram illustrating data communication between the MCU 130 of the portable multimedia player 100 of the present invention and the MCU 210 of the external audio system 200.

Hereinafter, an operation of the portable multimedia playback apparatus 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

First, when the portable multimedia player 100 of the present invention is inserted into the external audio system 200 shown in FIG. 4 in the direction of the arrow shown in FIG. 1, the two power terminals Tp and Tn provided on the insertion side are inserted. The power from the power supply unit 250 of the external audio system 200 is applied. After the power is applied, the MCU 130 of the portable multimedia player 100 reads the copyright information 11 stored in the audio memory 110 and the header information 1h to Nh corresponding to each of the memory blocks 12 to 15. To the MCU 210 of the external audio system 200 through the terminal DIO of the data communication unit 10. Next, when the user of the external audio system 200 selects a desired song based on the header information provided from the portable multimedia player 100, the MCU 210 selects a block selection signal for designating a memory block storing the selected song. The BS and the read signal WR are transmitted together with the synchronization signal CLK to the MCU 130 of the portable multimedia playback device 100 via the bus B5.

In response to the block selection signal BS from the MCU 210 of the external audio system 200, the MCU 130 outputs a signal BSS designating the block to the audio memory 110 through the bus B1 and at the same time the bus B2. The decode control signal DCS is output to the audio decoder 120 through.

The audio decoder 120 extracts and decodes audio data corresponding to the block designation signal BSS from the plurality of memory blocks 12 to 15 of the audio memory 110 in response to the decode control signal DCS from the MCU 130. The decoded audio data is supplied to the DAC 140 via the bus B4.

The DAC 140 converts the decoded audio data from the audio decoder 120 into, for example, an analog audio signal of two channels, and outputs it to the external audio system 200 as a stereo audio signal.

According to the present invention, the portable multimedia player 100 may control the audio decoder 120 to selectively or continuously output audio data stored in the audio memory 110.                     

On the other hand, referring to Figure 4, the external audio system 200 is a line from the DAC 140 of the portable multimedia playback device 100 shown in Figure 1 through the first and second amplifiers (AMP) (220, 230) Receive audio signals of the R channel and the L channel output through L1 and L2. These amplifiers 220 and 230 amplify the two input audio signals and transmit them to the audio player 240. The audio player 240 transmits the input amplified audio signal to the outside through an attached sound device (not shown) under the control of the MCU 210.

In addition, the user can directly listen to the analog audio signal output from the portable multimedia playback device 100 through an acoustic device such as an earphone.

In FIG. 4, the output of the audio signal from the portable multimedia playback apparatus 100 has been described as two channels, but it can be extended to three or more channels according to the specification of the audio system.

6 is a schematic block diagram of a portable multimedia player 300 according to another embodiment of the present invention. The portable multimedia playback apparatus 300 illustrated in FIG. 6 includes a video memory 310, a frame memory 320, and a video decoder 340. The portable multimedia playback apparatus according to the embodiment shown in FIG. Since it is similar to the apparatus 100, different parts are mainly described, and redundant descriptions are omitted.

Referring to FIG. 6, the portable multimedia playback apparatus 300 stores video data or video data compressed in MPEG-4, such as music video, or video data stored in the video memory 310. Is a frame memory 320 to extract the frame unit via the bus B7 and temporarily stored, and the MPEG-4 based video decoder 340 to decode the video data input from the frame memory 320 via the bus B8 frame by frame ), A DAC 350 converting the decoded data from the video decoder 340 into a standard video signal in analog form and outputting the same, and the MCU 330 controlling each of these components through the buses B6 and B9.

According to the present invention, the video memory 310 is composed of a low-cost mask ROM, an EEPROM, an EPROM, an OTPROM, and the like, and is integrated into the portable multimedia player 300. In the video memory 310, video-related digital data is stored in advance by a record provider or a copyright holder. In addition, although the video decoder 340 has been described as being based on MPEG-4 in response to a compression method of data stored in the video memory 310, the video decoder 340 is not limited thereto, and according to the compression method of video data stored in the video memory 310. Of course, it can be variously changed.

According to the present invention, since the final output signal from the portable multimedia playback apparatus 300 is a standard video signal, the video can be played back through a conventional video output apparatus such as a video cassette recorder or a TV without using a separate player. Reproduction of original digital video data stored in the memory 310 can be suppressed.

7 is a schematic block diagram of a portable multimedia playback device 400 according to another embodiment of the present invention. The portable multimedia player 400 shown in FIG. 7 includes a rechargeable battery 405, a rectifier 406 connected to the rechargeable battery 405, and an operation unit 407. Since it is similar to the portable multimedia player according to the present invention, different parts are mainly described, and redundant descriptions are omitted.

In the portable multimedia playback apparatus 400 according to the present invention, the rechargeable battery 405 is for supplying a driving voltage for driving each component in the apparatus, and its power source is a separate external interface (see FIG. 10). Are supplied through Rectifier 406 rectifies the output power from rechargeable battery 405 to generate a drive voltage V _DC to supply to each component within the device. The operation unit 407 includes a plurality of buttons, and displays a list of digital audio data stored in the audio memory 401, selection track information, a volume, and a remaining battery state of the rechargeable battery 405 according to a user's operation. A display (see FIG. 10) described later, such as a liquid crystal display device, is provided.

As shown in the figure, in the portable multimedia playback apparatus 400 of the present invention, an audio memory 401 which stores digital multimedia data in advance is integrally built in the portable multimedia playback apparatus 100, By outputting the analog audio signal through an external audio device such as an earphone, it is possible to suppress the duplication of digital multimedia data.

8 is a schematic block diagram of a portable multimedia player 500 according to another embodiment of the present invention. Unlike the portable multimedia playback apparatus 100 of FIG. 8, the portable multimedia playback apparatus 500 illustrated in FIG. 8 is used to play back video data, and includes a video memory 501, a video decoder 503, and a video codec 504. Since it is similar to the portable multimedia playback device 400 shown in FIG. 7 except for including a frame memory 507, different parts will be mainly described below, and description of overlapping parts will be omitted.

In the portable multimedia player 500 of FIG. 8, the video memory 501 stores, for example, MPEG-4 compressed video data or video data in advance, such as a music video, and has a low-cost mask ROM. ROM), EEPROM, EPROM, OTPROM and the like. The video memory 501 is integrally embedded in the portable multimedia playback device 500, and digital video data therein is stored in advance by a copyright holder or a music label provider.

The frame memory 507 temporarily stores, in units of frames, the video data stream VDS output from the video memory 501 through the line L12 under the control of the MCU 502 and supplies it to the video decoder 503 through the line L13. The video decoder 503 is based on, for example, the compression standard MPEG4-, and is line-by-frame line-by-frame from the frame memory 507 in response to a control signal DCS supplied from the MCU 502 through the line L14. The input video data stream VDS is decoded and supplied to the video codec 504 via line L13. The video codec 504 converts the decoded digital data from the video decoder 503 into a standard video signal in analog form and outputs it through the line L16. In the present invention, the video decoder 503 has been described as being based on MPEG-4, but is not limited thereto, and may be variously changed according to a compression method of video data stored in the video memory 501.

As shown, in the portable multimedia playback apparatus 500 of the present invention, a video memory 501 which stores digital multimedia data in advance is integrally embedded in the portable multimedia playback apparatus 500, and is provided from the device. By outputting the analog video signal through an external monitor, it is possible to suppress the duplication of digital multimedia data.

The portable multimedia playback apparatuses 400 and 500 of FIGS. 7 and 8 may include a remote controller (not shown), for example, as a peripheral device for the user's convenience. The remote controller may be provided with a display (not shown) for displaying the audio or video information recorded in the audio memory or the video memory to the user.

9 is a schematic block diagram of a portable multimedia playback device 600 according to another embodiment of the present invention. 10 is a schematic diagram illustrating that data can be downloaded from the Internet using the portable multimedia playback apparatus 600 of the present invention, a dedicated external interface, and a personal computer.

In Fig. 9, the additional memory 607 is used for data communication with an identification number uniquely assigned to the portable multimedia player 600 of the present invention and an external system such as a personal computer 1000 (see Fig. 10). The communication protocol is registered. To this end, the portable multimedia playback device 600 of the present invention is provided with an input and output terminal 609. In addition, as shown in FIG. 10, a display 610 is provided on the portable multimedia player 600. The input / output terminal 609 has a structure capable of accommodating the structure of the terminal 800a as shown in FIG. 10, which will be described later.                     

As illustrated in FIG. 10, the portable multimedia player 600 is connected to the personal computer 1000 through the first interface 800 and the second interface 900. In the first interface 800, one terminal 800a has a structure that can be inserted into the input and output terminal 609 of the portable multimedia playback device 600, the other terminal 800b of the second interface 900 It is connected to one end. The terminal 800a of the first interface 800 has a structure having nine pins, two of which are power pins 801 used for supplying power, and three of which are signals to sound equipment such as earphones. Sound pins 803 are used for output, and four are input / output pins 802 used for data input / output.

The second interface 900 has ordinary USB ports 900a and 900b at both ends, and is connected to a USB port (not shown) of the personal computer 1000. By such a connection, the CPU (not shown) of the personal computer 1000 recognizes the existence of the portable multimedia playback device 600, so that the portable multimedia playback device 600 can be controlled from the personal computer 1000. do. In this case, the present invention provides a control screen 200 that allows a user to control the portable multimedia playback device 600 on the monitor of the personal computer 1000 as shown in FIG.

Through such a control screen 2000, the portable multimedia playback apparatus 600 of the present invention can download data from the personal computer 1000, and transmit various digital multimedia data from a web server via a communication network such as the Internet. You can download it.

For example, when a user wants to download a desired audio file from a web server using the personal computer 1000, the user can use the portable multimedia playback device (eg, the first interface 800 and the second interface 900 described above). 600 is connected to the personal computer 1000, the user logs in to the web server in a normal manner, and various digital multimedia provided from the web server as shown in the PC audio file selection list 2001 of FIG. When the desired data is selected from the data, the unique number stored in the additional memory 607 in the portable multimedia playback apparatus 600 is transmitted to the web server, and the web server performs normal authentication processing based on the transmitted unique number. When the authentication process is completed, as shown in the file list 2002 in the audio memory of FIG. 11, the selected digital multimedia data is downloaded to the audio memory 601 of the portable multimedia playback device 600 via the personal computer 1000. Loading (2003) is enabled. In this case, the other terminal 800b of the first interface 800 functions as a data buffer.

In this way, the authentication process is performed based on the identification number uniquely assigned to the portable multimedia reproducing apparatus 600 of the present invention, and the digital multimedia data can be downloaded according to the result, which is effective for copyright protection.

Further, according to the present invention, the information of each audio file listed in the file list 2002 in the audio memory includes the song name, singer name, excluding actual sound source data, so that the user can check only the contents of the audio file stored in the audio memory. It is comprised so that a size and the like may be included. Accordingly, unlike a conventional MP3 player, uploading 2004 of audio files stored in the audio memory to the storage device in the personal computer 1000 can be restricted. Therefore, the present invention is effective for copyright protection by fundamentally preventing the digital audio data stored in the portable multimedia playback device from spreading to other portable multimedia playback devices.

In addition, according to the present invention, the rechargeable battery 605 of the portable multimedia playback device 600 is connected to the power pin 801, the first interface 800 and the second interface 900 of the above-described input and output terminal 609. It is charged by receiving a power supply from the personal computer 1000 through it. As a result, there is an advantage of not having to provide a separate power adapter.

In addition, by such an interface configuration, the portable multimedia playback apparatus 600 can download digital data such as images and texts from peripheral devices such as scanners and printers, and the downloaded data on another external display as described above. I can display it.

In addition, the portable multimedia player 600 of the present invention has a flat surface 611 in the form of a card, and the user can arbitrarily change the design of the flat surface 611 in the form of a sticker according to his / her preference.

While preferred embodiments of the present invention have been described above, those skilled in the art can make various changes without departing from the claims of the present invention.

Therefore, according to the present invention, a digital analog data compressed in a conventional manner by a music label provider or a copyright holder is integrally embedded in a device having a memory previously stored therein, and during reproduction of digital multimedia data stored in the memory, a standard analog signal By converting, outputting, and reproducing, the copying of digital data can be suppressed, which is effective for copyright protection.

Furthermore, according to the present invention, it is effective for copyright protection by restricting the uploading of audio files stored in the audio memory to the storage device of the personal computer, thereby preventing the digital audio data stored in the audio memory from spreading to other players. .

In addition, according to the present invention, by configuring the multimedia playback device in the form of a small, lightweight and thin card and also to incorporate a battery, there is an advantage that it is easy to carry.

Further, according to the present invention, the identification number uniquely assigned to the device can be registered in the additional memory in the device, and the digital multimedia data can be downloaded from the web server based on the unique number, which is effective for copyright protection. .

In addition, according to the present invention, when the digital data compressed and stored in the memory is reproduced, the stored digital data can be converted into a standard analog signal and outputted, so that a video cassette recorder or a TV can be used without any signal processing or a separate external player. The present invention can also be applied to ordinary multimedia systems such as the above.

Further, according to the present invention, the surface of the multimedia player can be a flat surface in the form of a card, and the design of the flat surface can be freely changed to the form desired by the user. Accordingly, the merchandise value of the portable multimedia playback device can be increased.                     

Further, according to the present invention, when the portable multimedia player is connected to a personal computer, the rechargeable battery in the portable multimedia player is charged by the power supplied from the personal computer, so that a separate power adapter is not provided. There is an advantage.

Claims (20)

delete delete delete delete delete delete delete delete delete In the portable multimedia playback device for playing compressed digital multimedia data, Input and output terminals, A memory for storing compressed digital multimedia data and an identification code uniquely assigned to the playback device; An operation unit having a plurality of buttons, Decoding means for decoding the compressed digital multimedia data; Conversion means for converting the digital multimedia data decoded by the decoding means into a standard analog signal and outputting the same through the input / output terminal; Control means for controlling the memory, the decoding means and the conversion means based on a command from the user from the user; Power supply means for supplying a driving voltage to each of the means; An interface for connecting to the input / output terminal and connecting to a personal computer Portable multimedia playback device comprising a. The method of claim 10, The portable multimedia player is a portable multimedia player having a card-like structure. The method of claim 10, The power supply means is a portable multimedia playback device is a built-in battery. The method of claim 12, And the built-in dry battery is charged by the power supplied from the personal computer when the portable multimedia player is connected to the personal computer through the interface. The method of claim 10, And the memory is one of a mask ROM, an EEPROM, an EPROM, and a one-time programmable (OTP) ROM. delete The method of claim 10, And display means for displaying information on the digital multimedia data stored in the memory. The method of claim 13, The interface has a first interface and a second interface, The first interface has a structure in which one end is matched with the input / output terminal, and a USB port structure in which the other end is connected to the second interface, the structure of which is used when supplying power from the personal computer. 2 pins, 3 pins used for signal output to external sound equipment and 4 pins used for data input and output, The second interface has a USB port structure at both ends, one end of which is connected to the other end of the first interface, and the other end of which is connected to a USB port of the personal computer. The method of claim 17, And a digital multimedia data provided through the communication network by the personal computer and the first and second interfaces. The method of claim 18, And the identification number stored in the memory is transmitted to the communication network upon the download. The method of claim 19, A portable multimedia playback device in which only data except for actual sound source data among the digital multimedia data downloaded to the memory are read by the personal computer.

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