KR101164248B1 - Universal serial bus interlock car audio system and control method thereof - Google Patents

Abstract

The present invention relates to a car audio system, and more particularly, can be connected to an external storage device to read and write data of the external storage device, and a universal serial bus (USB) capable of controlling the external storage device. The present invention relates to an interlocking audio system and a method thereof. In the present invention, by applying the USB to the car audio system can play and delete the audio-related files stored in the USB external storage device, such as USB memory and USB MP3 playback, audio signals and audio output from the radio, cassette playback and CDP, etc. Provides a USB interlocking car audio system that can decode data into audio compressed files such as MP3 files and store them in the USB external storage device, thereby increasing the utilization of the USB external storage device, and allowing the driver to easily and conveniently use the USB external storage device in the vehicle. Control the audio to provide the effect.

Car Audio, USB, MP3, MP3 Encoding, Interlocking

Description

Universal serial bus interlocking car audio system and its control method {UNIVERSAL SERIAL BUS INTERLOCK CAR AUDIO SYSTEM AND CONTROL METHOD THEREOF}

1 is a view showing a schematic configuration of a universal serial bus interworking car audio system according to the present invention

2 is a view showing the configuration of a universal serial bus interworking car audio system according to the present invention

3 is a diagram illustrating a configuration of an external storage device interworking with a universal serial bus interworking car audio system according to the present invention;

4 is a flowchart illustrating a control method of a universal serial bus interworking car audio system according to a first embodiment of the present invention.

5 is a flowchart illustrating a control method of a universal serial bus interworking car audio system according to a second embodiment of the present invention.

6 is a flowchart illustrating an operation of an external storage device connected to a universal serial bus interworking car audio system according to a second embodiment of the present invention.

The present invention relates to a car audio system, and more particularly, to a general-purpose serial bus interlocking audio system and method for reading and writing data of an external storage device by connecting to an external storage device and controlling the external storage device. It is about.

Currently, the penetration rate of small external devices (hereinafter referred to as USB external storage devices collectively referred to as "USB" devices) using a universal serial bus (hereinafter referred to as "USB") in flash memory and MP3 players is increasing. USB external storage devices such as USB memories and USB MP3 players have good portability, easy connection with personal computers (PCs), and convenient data deletion and writing.

Cars are equipped with a car audio system, which is a necessity, to relieve the boredom of driving and to make a hobby. Such a car audio system has a compact disk player (CDP) that can listen to music recorded on a compact disk (CD), a radio, and a tape player that can listen to music recorded on a tape. Player). Recently, a car audio system having an MP3 player function capable of listening to MP3 files recorded on a CD has also been released.

As such, USB external storage devices, such as USB memory and USB MP3 playback, are portable and easy to delete, move, and write, so that many users use them. It was not possible to utilize data files such as old music.

Conventional method for listening to the audio recorded in MP3 playback is to use the Car Pack to connect the audio system to the car audio system through the output terminal of the MP3 playback and the tape playback of the car audio system using a Car Pack And a method of transmitting an audio signal output to the MP3 playback on a specific frequency of a radio.

As described above, in the conventional car audio system, since the USB external storage device cannot be directly connected, audio data recorded in the USB external storage device cannot be heard.

In addition, in order to listen to the audio data recorded in the MP3 playback having a playback function among the USB external storage devices in the car audio system, a separate connection device must be purchased, so a separate purchase cost must be paid. There was a problem with clutter.

In addition, even when a user listens to audio by connecting to an external USB storage device using a separate device, the conventional car audio system simply performs a passive operation of receiving and outputting only an audio signal from the USB external storage device. Since there is a need to control the storage device there was a problem that can interfere with safe operation.

Accordingly, an object of the present invention is to provide a general-purpose serial bus interlocking audio system and a method for reading and writing data of an external storage device by connecting to an external storage device and directly controlling the external storage device.

The apparatus of the present invention for achieving the above object; In the universal serial bus interworking car audio system, when the universal serial bus port is provided and the universal serial bus external storage device is connected to the universal serial bus port, data communication with the universal serial bus external storage device is performed according to the universal serial bus protocol. A host universal serial bus interface unit, an input unit for outputting a control command input by a user, a storage unit for storing a file list for audio data stored in the universal serial bus external storage device and a playlist selected by the user And an audio processor for processing an input audio signal and outputting it through a speaker or converting input audio data into an audio signal and outputting the audio signal through a speaker after the audio processing and the host universal serial bus interface unit. Is recognized, Receives a file list of audio data stored in a general-purpose serial bus external storage device and controls it to be stored in the storage unit, and controls the audio data stored in the universal serial bus external storage device according to a control command of the user. And a controller configured to control the audio processor to be processed, wherein the controller controls the audio signal input from the radio, the audio signal of the cassette tape, or the audio data of the compact disc when the user's control command is a decoding command. After decoding to an audio compression file, characterized in that the control to store in the universal serial bus external storage device.

Another apparatus of the present invention for achieving the above object; In a universal serial bus interworking car audio system, when a connection with the car audio system is detected, a file list of stored audio data is transmitted, and when a control message or audio data is received from the car audio system, the received audio is transmitted. Receives and stores the transmitted file list after recognizing a connection between the universal serial bus external storage device and the universal serial bus external storage device which stores data or performs an operation according to a control command of a received control message, When a control command is input from a user, a control message including a control command inputted is generated and transmitted to the universal serial bus external storage device, and audio data stored in the universal serial bus external storage device is reproduced according to the control command. Process or play the audio signal It is characterized by comprising a car audio system to decode the audio compression file of the format specified by the transmission to the universal serial bus external storage device.

The method of the present invention for achieving the above object; A method of interworking a universal serial bus interworking car audio system connected to a universal serial bus external storage device, the method of recognizing a connection with the universal serial bus external storage device, and if the connection is recognized, the universal serial bus external storage device. Storing a file list and a playlist selected by the user for the audio data stored in the user; and when a control command is input from the user, performing an operation according to the input control command. If the command is a play command, the audio data of the corresponding file is sequentially read from the universal serial bus external storage device with reference to the play list to be played by an audio processor. If the input control command is a decoding command, the audio being output is output. Compress the signal in a format you specify Days after decoding is characterized in that stored in the general-purpose serial bus, an external storage device.

Another method of the present invention for achieving the above object is; A method of interworking a universal serial bus interworking car audio system connected to a universal serial bus external storage device, the method comprising: recognizing a connection between the universal serial bus external storage device and a car audio system, and the universal serial bus external storage device Transmitting a file list of the audio data stored according to the universal serial bus protocol in the; and receiving and storing the file list in the car audio system, and when the control command is input from the user, the control command is included. Transmitting a control message to the universal serial bus external storage device, receiving a control message from the universal serial bus external storage device, detecting a control command from the control message, and performing a control operation on the detected control command. In the general serial bus external storage device made of If a control command is a selection command, the file name of the corresponding audio data is stored in a play list, and if a play command is detected, the audio data corresponding to the play list is transmitted to the car audio system in a set order. In the case of the decoding command, the audio signal being output is decoded into an audio compression file having a format designated by a user and then stored in the general-purpose serial bus external storage device.

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Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to deviate from the gist of the present invention.

The present invention can be applied to the car audio system USB to play and delete the audio-related files stored in the USB external storage device, such as USB memory and USB MP3 player, audio signal output from the radio, cassette player (TP) and CDP, etc. And a USB interworking car audio system capable of decoding audio data into an MP3 file and storing it in the USB external storage device. The audio data here is PCM data.

With reference to the drawings will be described the configuration and interworking method of a universal serial bus interworking car audio system according to the present invention.

1 is a view showing a schematic configuration of a universal serial bus interlocking car audio system according to the present invention, Figure 2 is a view showing the configuration of a universal serial bus interlocking car audio system according to the present invention, Figure 3 FIG. 3 is a diagram illustrating the configuration of a USB external storage device interworking with a universal serial bus interworking car audio system. Referring to FIG. A description with reference to FIGS. 1 to 3 is as follows.

Universal serial bus interworking car audio system according to the present invention is composed of a car audio system 100 and a USB external storage device (200).

Referring to FIG. 2, the car audio system 100 according to the present invention will be described. The audio system 100 includes an audio control unit 10, an audio first storage unit 20, and an audio second storage unit 25. ), An audio input unit 30, an audio display unit 40, a host universal serial bus interface unit 50, and an audio processing unit 60.

The audio controller 10 controls the overall operation of the car audio system 100 according to the present invention. In addition, the audio controller 10 encodes and outputs the audio compressed file into audio data, and decodes the input audio data into an audio compressed file.

The audio first storage unit 20 includes an area for storing a control program for controlling the car audio system 100 and an area for temporarily storing data generated while the control program is executed.

The audio second storage unit 25 stores a file list received from the USB external storage device 100 and a playlist selected by the user.

The audio input unit 30 may be a key input device or a touch pad that generates and outputs a selection command, a playback command, a delete command, a pause and stop command, an audio compression decoding command, and the like input by a user.

The audio display unit 40 displays an operation mode and an operation state, a file list, and a play list of the car audio system 100. When the audio input unit 30 is a touch pad, the audio display unit 40 is used integrally with the audio input unit 30 (commonly referred to as a touch screen).

The host universal serial bus interface unit 50 includes at least one USB port for connecting with the USB external storage device 200 and performs data communication with the USB external storage device 200 connected according to the USB protocol.

The audio processor 60 receives an audio signal from a radio or cassette player, performs audio processing such as equalization and amplification of an audio signal, and outputs the same through a speaker, and outputs a CDP and a digital video disk player. DVDP) and the audio controller 10 receive audio data, convert the audio data into an audio signal, perform audio processing, and output the same through a speaker. In addition, the audio processor 60 of the present invention converts an audio signal input from the radio or cassette player into audio data under the control of the audio controller 10 and outputs the audio data to the audio controller 10, and outputs the CDP or DVDP. The audio data output from the audio signal is output to the audio controller 10.

Referring to FIG. 3, the configuration of the USB external storage device 200 will be described. The USB external storage device 200 includes a control unit 110, a first storage unit 120, a second storage unit 121, and a third storage unit. The storage unit 123, the input unit 130, the display unit 140, the client universal serial bus interface unit 150, the audio processing unit 160, and the audio output unit 170 are configured.

The controller 110 controls the overall operation of the USB external storage device 200.

The first storage unit 120 stores a control program for controlling the operation of the USB external storage device 200.

The second storage unit 121 temporarily stores data generated during the execution of the control program.

The third storage unit 123 stores all kinds of data including audio compressed files such as MP3 files.

The input unit 130 includes keys such as a search key for searching data, a selection key for selecting data, a playback key for playing the selected data, a pause key and a pause key for pausing and stopping playback. The command for the keys is output to the controller 110.

The display unit 140 is a display device such as a liquid crystal display (LCD) or an organic EL and displays an operation state of MP3 reproduction and a file list and a reproduction list for the stored data.

The client USB interface unit 150 is connected to the host USB interface unit 50 of the car audio system 100 to perform data communication.

The audio processor 160 converts an audio compressed file stored in the third storage unit 123 into an audio signal and performs audio processing under the control of the MP3 controller 110 and is connected to an earphone or an audio cable. 170).

In FIG. 3, the configuration of the USB MP3 player is described. However, in the case of the USB memory, the controller 110 which performs only a write / read control operation of data according to the client USB interface unit 150 and a USB protocol and write / write of data are described. And a first storage unit 120 for storing a control program for controlling reading, a second storage unit 121 and a third storage unit 123 for temporarily storing data generated during execution of the control program. Note that the operation for reading / writing the data is performed in the same manner as in the case of the MP3 player, and thus description thereof will be omitted.

4 is a flowchart illustrating a control method of a universal serial bus interworking car audio system according to a first embodiment of the present invention, which is a flowchart showing a method applicable to both a USB memory and a USB MP3 player.

First, in step 411, the audio controller 10 of the car audio system 100 checks whether the USB external storage device 200 is connected through the host universal serial bus interface 50.

If the USB external storage device 200 is detected in step 411, the audio control unit 10 proceeds to step 415 to generate and store a file list according to the USB protocol through the host USB interface unit 50.

If the file list is generated in step 415, the audio control unit 10 proceeds to step 417 to filter the files that can be played in the car audio system and displays the filtered file list in step 419. The audio controller 10 may display a file list of all files without the filtering process of step 417 by a user setting (not shown). In this case, since all files are displayed, it may be desirable to display information about the files, for example, an extension.

When the file list is displayed, the audio controller 10 checks whether a control command is input from the audio input unit 30 in steps 421, 423, and 424. In step 421, it is checked whether a selection command for selecting a specific file is input from the displayed file list. In step 423, it is checked whether a playback command is input. In step 424, a decoding command for decoding into an audio file of a specific format is input. Check it. In the present invention, the decoding shows a case of decoding an MP3 file, but may be decoded in any other format (WMA, OGG, etc.).

If the selection command is input in step 421, the audio control unit 10 proceeds to step 425 and stores the file name in which the selection bar is placed among the file names of the displayed file list in the play list, and checks the control command input. Return to (step 421, step 423, step 424).

If the play command is input in step 423, the audio control unit 10 proceeds to step 427 and examines the pause flag. If the pause flag is reset (or set), the audio control unit 10 sets a file for the stored file names of the playlist in advance. In order to read and play from the third storage unit 123 of the USB external storage device 200 in accordance with the USB protocol. If no file is selected in the file list, the playable file, that is, the audio file, among the files stored in the third storage unit 123 is filtered and read. However, if the pause flag is set (or reset) by checking the pause flag, the audio controller 10 reads the paused file and the position of the file in the region of the predefined audio first storage unit 20 and stops it. Play the file from the location.

During playback of the files, the audio controller 10 proceeds to step 429 to check whether the pause or stop command is input from the audio input unit 30, and when the pause or stop command is input, the audio control unit 10 proceeds to step 431 to stop playback. Return to the control command input check process. In the case of the pause, it is necessary to store the stop position in the corresponding area of the audio first storage unit 20 and set the pause flag to three.

If the decoding command is input in step 424, the audio controller 10 proceeds to step 433 and checks whether there is an audio signal or audio data input to the audio processor 60 (not shown). If there is an audio signal or audio data, the audio control unit 10 converts the audio signal into audio data through the audio processor 60 and receives the audio data as it is, and receives the audio data as a preset audio compressed file (for example, an MP3 file). Decode After the decoding, the audio control unit 10 proceeds to step 429 and checks whether a pause or stop command is input and stops decoding when the stop command or pause command is input. The decoded audio compressed file is stored in the third storage unit 123 of the USB external storage device 200.

5 is a flowchart illustrating a control method of a universal serial bus interworking car audio system according to a second embodiment of the present invention, and FIG. 6 is a USB connected to a universal serial bus interworking car audio system according to a second embodiment of the present invention. A flowchart illustrating an operation in the external storage device 200 is a diagram illustrating a method of directly controlling the USB external storage device 200 in the car audio system 100. Hereinafter, a description will be given with reference to FIGS. 1 to 3 and 5 to 6.

First, when the USB external storage device 200 is connected to the car audio system 100, the audio controller 10 detects the connection of the USB external storage device 200 in step 511 and controls the USB external storage device 200. In operation 611, the controller 110 recognizes that the host 110 is connected to the car audio system 100.

When the interconnection is detected in steps 511 and 611, the controller 110 of the USB external storage device 200 transmits a file list to the car audio system according to the USB protocol in step 615.

Then, the audio control unit 10 of the car audio system 100 receives the file list in step 515, proceeds to step 517 to filter only the playable file, and proceeds to step 519 to display the filtered file list in the audio display unit 40. Is displayed.

After the display, the audio controller 10 checks whether a control command is input from the audio input unit 30 in steps 521, 523, and 524.

When the selection control command is input in step 521, the audio controller 10 transmits the selection control message to the USB external storage device 200 through the host USB interface unit 50 according to the USB protocol. The selection control message includes information on the selected file. When the playback control command is input in step 523, the audio controller 10 proceeds to step 527 and transmits a playback control message to the USB external storage device 200 through the host USB interface unit 50 according to the USB protocol. In addition, when the delete control command is input in step 524, the audio controller 10 proceeds to step 537 and transmits a delete control message to the USB external storage device 200. The deletion control message includes information on a file to be deleted.

The controller 110 of the USB external storage device 200 checks whether the control message is received by the client USB interface unit 150 in steps 617, 619, and 620 after the file list is transmitted. In step 617, when the selection control message transmitted from the car audio system 100 is received in step 525 of FIG. 5, the controller 110 proceeds to step 621, selects the file, stores the selected file in the playlist, and receives the control message. Return to the inspection process (steps 617, 619, and 620). In step 619, when the playback control message transmitted by the car audio system 100 is received in step 527 of FIG. 5, the controller 110 proceeds to step 623 and sequentially processes the files stored in the playlist in a preset order. The processor 60 outputs the audio data to the processor 60 and receives the coded audio data for reproduction, and transmits the audio data through the client USB interface 150. In operation 620, when the deletion control message is received, the controller 110 proceeds to operation 631 to detect file information on the corresponding file, and finds and deletes the file from the third storage unit 123.

When the USB external storage device 200 starts to transmit the file, the audio control unit 10 of the car audio system 100 receives the signal at step 529, and outputs the audio signal to the audio processor 60 at step 531 to convert the file into an audio signal. Output through the speaker (SP).

If the pause or stop command is inputted in step 533 of the audio output, the audio controller 10 transmits a stop control message to the USB external storage device 200 through the host USB interface 50. .

Then, the control unit 110 of the USB external storage device 200 checks whether the stop control message is received in step 627 after the file is transmitted, and stops the signal transmitted from the car audio system 100 in step 535. When the control message is received through the client USB interface unit 150, the file transfer is stopped in step 629.

4 and 5, the audio signal or audio data output from the radio, CDP, DVDP, and CP are decoded into a specific audio compressed file, for example, MP3 format, as in the first embodiment of FIG. 3. To the third storage unit 123 of the USB external storage device 200.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention can reproduce audio compressed files stored in a small portable USB external storage device in a car audio system, thereby increasing the utility and satisfaction of the driver.

In addition, since the present invention can directly control the file list including the audio compressed file stored in the USB external storage device in the car audio system, the driver can drive safely than when directly viewing and controlling the USB external storage device. Has

In addition, the present invention has the advantage that can be played music files stored in the USB external storage device, without a separate device such as car pack.

Claims (22)

In the universal serial bus interworking car audio system, A host universal serial bus interface unit having a universal serial bus port and performing data communication with the universal serial bus external storage device according to the universal serial bus protocol when the universal serial bus external storage device is connected to the universal serial bus port; An input unit for outputting a control command input by a user, A storage unit for storing a file list of audio data stored in the universal serial bus external storage device and a playlist selected by the user; An audio processor which processes an input audio signal and outputs it through a speaker or converts input audio data into an audio signal and processes the audio signal and then outputs it through a speaker; When the connection of the universal serial bus external storage device is recognized through the host universal serial bus interface unit, a file list of audio data stored in the universal serial bus external storage device is received and controlled to be stored in the storage unit. And a controller for controlling audio data stored in the universal serial bus external storage device to be processed by the audio processor according to the user's control command. When the control command of the user is a decoding command, the control unit decodes an audio signal input from a radio, an audio signal of a cassette tape, or audio data of a compact disc into an audio compressed file of a format designated by a user, and then, outside the universal serial bus. Universal serial bus interworking car audio system, characterized in that the control to save to the storage device. The method of claim 1, When the control command of the user is a playback command, the controller sequentially reads audio data of the corresponding file stored in the universal serial bus external storage device through the host universal serial bus interface unit according to the play list stored in the storage unit. And outputting a file to be reproduced by an audio processing unit and deleting a corresponding file in the universal serial bus external storage device or audio data in the file when the control command of the user is a delete command. delete delete delete delete In the universal serial bus interworking car audio system, When a connection with the car audio system is detected, a file list of the stored audio data is transmitted, and when a control message or audio data is received from the car audio system, the received audio data is stored or the received control message is stored. General-purpose serial bus external storage device performing an operation according to a control command Receives and stores the transmitted file list after the connection with the universal serial bus external storage device is recognized, and generates a control message including a control command input when a control command is input from a user, thereby externally storing the universal serial bus external storage device. Transmits to the device, and reproduces audio data stored in the universal serial bus external storage device according to the control command, or decodes the reproduced audio signal into an audio compressed file of a user-specified format and then externally Universal serial bus interworking car audio system, characterized in that configured as a car audio system to transmit to the storage device. The method of claim 7, wherein The universal serial bus external storage device, A client universal serial bus interface unit for performing data communication with the car audio system according to the universal serial bus protocol; A storage unit including an area for storing the pre-stored audio data and audio data transmitted from a car audio system, a control program storage area, and an area for temporarily storing data generated during execution of the control program; An audio processor converting the audio data stored in the storage unit into an audio signal and then processing the audio signal and outputting the audio signal; When the connection with the car audio system is recognized through the client universal serial bus interface unit, the file list for the pre-stored audio data is controlled or the audio data transmitted from the car audio system is stored and the control message is received. Perform an operation according to any one of a command for selecting, playing, pausing, stopping, and deleting files, which are control commands included in the received control message, or transferring audio data according to a play list stored in the storage unit to a car audio system. It is a universal serial bus MP3 player composed of a control unit for transmitting, The storage unit stores a play list for audio data selected by the user according to the selection of the control command file in the car audio system, And the controller transmits the audio data according to the play list to the car audio system according to the set order when the control command is playing. delete The method of claim 7, wherein The car audio system, A host universal serial bus interface unit having a universal serial bus port and performing data communication with the universal serial bus external storage device according to the universal serial bus protocol when the universal serial bus external storage device is connected to the universal serial bus port; An audio input unit for outputting a control command input by a user, A storage unit for storing a file list of audio data stored in the universal serial bus external storage device and a play list selected by a user; An audio processor for outputting an input audio signal through a speaker or converting input audio data into an audio signal and outputting the audio signal through the speaker; When the connection of the universal serial bus external storage device is recognized through the host universal serial bus interface unit, a file list of audio data stored in the universal serial bus external storage device is received and controlled to be stored in the storage unit. And an audio controller configured to sequentially read audio data stored in the universal serial bus external storage device according to a user's control command and output the audio data to an audio processor. delete In the interworking method of the universal serial bus interworking car audio system connected to the universal serial bus external storage device, Recognizing a connection with the universal serial bus external storage device; Storing a file list of audio data stored in the universal serial bus external storage device and a playlist selected by the user when the connection is recognized; and When a control command is input from the user, a process of performing an operation according to the input control command, If the input control command is a play command, audio data of the corresponding file is sequentially read from the universal serial bus external storage device with reference to the play list to be played by an audio processor. If the input control command is a decoding command, the output audio signal is decoded into an audio compression file having a format designated by a user and then stored in the universal serial bus external storage device. . The method of claim 12, If the input control command is a file selection control command, the selected file name is stored in a play list, and when the user's control command is a delete command, the corresponding file or audio data in the file is deleted in the universal serial bus external storage device. Interworking method of a universal serial bus interworking car audio system, characterized in that. delete  The method of claim 12, And if the control command is a pause or stop command, performing a control operation to pause or stop playback of audio data of the file being played. delete In the interworking method of the universal serial bus interworking car audio system connected to the universal serial bus external storage device, The universal serial bus external storage device and the car audio system recognizes the connection between each other, Transmitting a file list of audio data stored according to a universal serial bus protocol in the universal serial bus external storage device; Receiving and storing the file list in the car audio system, and when a control command is input from a user, transmitting a control message including the control command to the universal serial bus external storage device; and Receiving a control message from the general-purpose serial bus external storage device, detecting a control command from the control message, and performing a control operation on the detected control command; If the control command detected by the general-purpose serial bus external storage device is a selection command, the file name of the corresponding audio data is stored in a play list. To, When the detected control command is a decoding command, the audio signal being output is decoded into an audio compression file having a format designated by a user, and then stored in the universal serial bus external storage device. Interlock method.  The method of claim 17, When the control command input from the user is a selection command, the car audio system stores the corresponding file name in the play list and transmits the file name including the file name stored in the control message. Way. delete delete The method of claim 17, And reproducing all the playable files stored when there is no file name of the corresponding audio data stored in the play list when the play command is detected. The method of claim 17, If the detected control command is a delete, pause, or stop command, deletes the corresponding file or pauses or stops playback of the file.

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