KR20010100241A - Apparatus writing and playing Audio signal of Radio Wave and Method therefor - Google Patents

Abstract

The present invention includes selecting, detecting, and demodulating a radio broadcast of a predetermined channel, and outputting the signal; determining whether a command for recording the music being output is input; and when the recording command is input, input an analog signal. Converting the digital data to a predetermined compression rate, assigning a unique number to the compressed music file, storing the compressed music file in a memory, and after performing the step, a unique number among a plurality of music files stored in the memory. Selecting a specific music file with reference to, and sequentially reading the selected music file from the memory to restore the original digital data to convert to an analog signal, and amplified by the converted analog signal to the speaker Outputting the digital audio signal through an FM audio signal transmitted through a radio broadcast. By converting and compressing and storing them on the hard disk, and re-editing and storing the stored music data by genre or artist, music recording and playback of over-the-air broadcasting that can implement a home music box system by selecting and playing or outputting music arbitrarily desired by the user An apparatus and a method thereof are provided.

Description

Apparatus writing and playing Audio signal of Radio Wave and Method therefor}

The present invention relates to a music conversion system of airwave broadcasting, and in particular, by converting and compressing an FM audio signal transmitted through airwave broadcasting into digital data, storing it on a hard disk, and re-editing and storing the stored music data by genre or singer, The present invention relates to a music recording and reproducing apparatus for over-the-air broadcasting, and a method thereof, which can implement a home music box system by selecting and reproducing or outputting music desired by a user.

As signal processing technology develops, compression techniques of audio and video signals are becoming common and used, and audio signals are usually compressed by a technique called audio MPEG, which is a layer 1 (Layer) according to the development stage. 1) to Layer 3 (Layer 3).

The audio MPEG standards of layers 1 to 3 are abbreviated as MP1 to MP3, respectively. Among them, music data in MP3 format includes data in wave format of 12: 1 to MP3. Compressed to 14: 1, the file is compact and has good sound quality, so it's popular with the general public.

Since the music data compressed by the MP3 format is small and can be easily copied to a storage device such as a hard disk of a computer, MP3 is becoming a representative format for sharing music through the Internet.

In general, music means that a user prepares many kinds of songs and selects and listens to some of them according to tastes and moods. In the case of music data, unlike other data, a plurality of songs are stored. Both are strongly required for some kind of databaseization.

For the reason mentioned above, portable MP3 players have been developed and marketed on the Internet in order to download and update the latest songs at any time. However, these players are mainly equipped with flash memory or compact disc (CDRW) as a storage medium. The price is expensive compared to storage capacity and its use is limited to portable, so it is difficult to secure marketability due to its small application range.

Currently, the computer downloads the desired songs to the hard disk via the Internet and plays them directly or downloads music files to the portable MP3 player using a predetermined serial port and plays them directly on the portable MP3 player. As a result, the MP3 business is facing some difficulties.

However, this can only be done on the premise that the user can use the computer, and it takes at least 10 minutes to download a song, and it is limited to music contained in MP3 files as downloadable songs. Therefore, the number of songs that can accommodate all age groups including men and women is absolutely insufficient, and MP3 Player has a problem that the number of songs that can be stored is limited to about 10 songs by downloading using a flash memory or a compact disc. .

Accordingly, an object of the present invention is to convert and compress the FM audio signal transmitted through radio broadcasting into digital data, store it on a hard disk, and re-edit and store the stored music data by genre or artist, thereby selecting music that the user wants to listen to arbitrarily. The present invention provides an apparatus and method for recording and reproducing music on airwaves that can be reproduced or outputted to implement a home music box system.

Technical means of the present invention for achieving the above object, the radio receiver unit for selecting and amplifying a desired frequency signal from the radio signal induced in the antenna and converting it into an intermediate frequency signal, and detects the intermediate frequency signal output from the radio receiver And a digital signal output through the A / D converter, and an A / D converter for converting an analog signal output from the voice signal processor into a digital signal according to a predetermined recording control signal. A data converting unit, a memory for storing the music file compressed through the data converting unit, a data restoring unit for restoring music files stored in the memory to original digital data according to a predetermined playback control signal, and the data restoring unit A D / A converter for converting digital data output from the digital signal into an analog signal, and output from the D / A converter. An audio amplifier for amplifying and outputting an analog signal, and controlling tuning and recording of a selected voice signal in a desired frequency band according to a predetermined input command, and re-editing music files stored in the memory by genre or singer. It is characterized in that it comprises a system controller for controlling to output a list of music files in accordance with a predetermined key selection after recording.

In addition, the technical method of the present invention for achieving the above object comprises the steps of selecting, detecting and demodulating and outputting a radio channel of a predetermined channel, and determining whether a command for recording the output music is input; When the recording command is input, converting the input analog signal into digital data and compressing the same at a predetermined compression rate, assigning a unique number to the compressed music file, and storing the compressed music file in a memory; Thereafter, selecting a specific music file by referring to a unique number among the plurality of music files stored in the memory, and sequentially reading the selected music file from the memory, restoring the original digital data, and converting it into an analog signal. Amplifying the converted analog signal and outputting the same through a speaker. It shall be.

1 is a block diagram showing a music recording and reproducing apparatus according to an embodiment of the present invention;

2 is a flowchart showing a method of recording music data transmitted over the airwave broadcasting according to an embodiment of the present invention;

3 is a flowchart showing a method for reproducing recorded music data according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: radio receiver 115: voice signal processing unit

120: playback switch unit 125: audio amplifier

130: speaker 140: recording switch unit

145: analog / digital conversion unit 150: data conversion unit

155: memory (HDD) 160: key input unit

165: display unit 170: data recovery unit

175: digital / analog converter 180: interface

190: system controller 200: portable audio player

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

1 is a block diagram showing a music recording and reproducing apparatus according to an embodiment of the present invention, which includes a radio receiver 110, a voice signal processor 115, a playback switch unit 120, an audio amplifier 125, and a speaker 130. ), Recording switch unit 140, analog / digital conversion unit 145, data conversion unit 150, memory 155 (HDD), key input unit 160, display unit 165, data restore unit 170, The digital / analog converter 175, the interface 180, and the system controller 190 are provided.

The radio receiver 110 is configured to select and amplify a desired frequency band signal from the radio signal induced in the antenna and convert it into an intermediate frequency signal, and the voice signal processor 115 is an intermediate frequency output from the radio receiver 110. It is configured to detect a signal and demodulate the original audio signal, and the playback switch unit 120 is configured to determine whether to output the audio signal output from the audio signal processing unit 115 by opening and closing according to a predetermined playback control signal. The audio amplifier 125 is configured to amplify the input audio signal to a predetermined level, and the speaker 130 is configured to output the audio signal amplified by the audio amplifier 125.

In addition, the recording switch unit 140 is configured to determine whether or not to output the voice signal output from the voice signal processing unit 115 by opening and closing according to a predetermined recording control signal, the analog / digital converter 145 (ADC) It is configured to convert the analog audio signal output through the recording switch unit 140 to a digital signal after error correction, the data conversion unit 150 is a predetermined signal to the digital signal output through the analog / digital conversion unit 145 It is configured to compress at a compression rate, the memory 155 is composed of a hard disk for storing a plurality of compressed music data through the data converter, the key input unit 160 selects a desired frequency band or the selected voice signal Plays recorded or recorded music files, and consists of keyswitches for re-editing a plurality of music files stored in the memory 155 by genre or singer. And a display unit 165 is made up of LCD device for displaying the selected commands and the audio operation states and various types of memory information to the key input unit 160.

In addition, the data restorer 170 is configured to decompress the music file stored in the memory 155 and restore the original music data according to a predetermined playback signal, and the digital / analog converter 175 is a data restorer. It is configured to convert the digital data output from the 170 to an analog signal to provide to the audio amplifier 125, the interface 180 is a terminal for connecting to a separate portable audio player 200 to the memory 155 The stored music file can be selected and downloaded to the portable audio player 200 for recording.

In addition, the system controller 190 controls tuning and tuning of a desired frequency band and recording and reproducing of a selected voice signal according to a command input from the key input unit 160, and controls the memory 155 according to an editing command of the key input unit 160. The recorded music files are edited by genre or artist and re-recorded, and then a specific music file is controlled according to the user's key selection.

The portable audio player 200 selectively converts the music files recorded on the hard disk 155 through the interface 180 by converting the digital music files stored in the built-in smart card or memory into analog signals and playing them. It can be downloaded and recorded and played.

The recording switch 140 and the reproduction switch 120 are opened and closed differently at the time of listening, recording, and reproduction, and are shown in Table 1 below.

When listening When recording When playing Record switch 140 OFF ON OFF (ON) Regeneration switch (120) ON ON (OFF) OFF

As shown in Table 1, the recording switch 140 must be closed (ON) during recording, but the playback switch 120 can selectively adopt ON or OFF, and during playback, the playback switch 120 must be opened ( OFF), but the recording switch 140 can selectively adopt OFF or ON.

Particularly, in the present invention, the memory 155 is adopted as a hard disk driver (HDD), which is to store hundreds to thousands of songs and implement them as a home music box, and the system controller 190 when recording music data. In addition to automatically assigning a unique number to the music data, the key input unit 160 assigns and classifies and manages a specific music file by assigning an index number including genre, singer, and year, and selecting songs of a desired genre and singer. Can be reproduced.

An operation process of the music recording and reproducing system of the present invention configured as described above will be described with reference to the flowcharts of FIGS. 2 and 3.

FIG. 2 shows a method of recording music data transmitted over the airwaves, and FIG. 3 shows a method for reproducing recorded music data.

First, according to the tuning control signal of the system controller 190, the radio receiver 110 selects and amplifies a radio broadcast of a predetermined channel, converts it into an intermediate frequency signal, detects and demodulates the signal through the voice signal processor 115, and then low frequency. After amplifying, the voice signal is output through the speaker 130 (S1).

Thereafter, the system controller 190 determines whether a command for recording broadcast music data is input from the key input unit 160 (S2), and when a recording command is input, the system controller 190 outputs and records a control signal. The switch 140 is closed (Turn-On) (S3).

Then, the analog / digital converter 145 receives the demodulated voice signal output through the voice signal processor 115 and converts the demodulated voice signal into a predetermined bit of digital data at a predetermined sampling frequency (S4). The voice signal converted into data is compressed at a predetermined compression rate through the data converter 150 (S5).

The compressed music file is assigned a predetermined ID number by the system controller 190 and stored in the hard disk 155 (S6 and S7).

The system controller 190 automatically assigns an ID, which is a serial number, to a music file in the order of being recorded on the hard disk 155. The ID number corresponds to an ID including the genre and order of the music data. According to the key input of, you can change and classify by ID of specific code.

Subsequently, while tuning and outputting a radio broadcast (S11), the system controller 190 selects specific music files by referring to a classification ID number among a plurality of music files included in the hard disk 155 from the external key input unit 160. When the command is input, the ID number of the selected music file is displayed on the display unit 165 (S12).

Subsequently, the system controller 190 determines whether a command for playing the music file being displayed from the key input unit 160 has been input (S13), and when the play command is input, the system controller 190 outputs a control signal to play the music file. The switch 120 is turned off (Turn-Off) (S14).

In addition, the system controller 190 searches for the music file selected above, reads it from the hard disk 155 in order (S15), and decompresses the read music file through the data restorer 170 to restore the original digital data. Restore to (S16).

The restored digital data is converted into an analog signal through the digital / analog converter 175, applied to the audio amplifier 125, amplified to a predetermined level, and output through the speaker 130 (S17 and S18).

Although specific embodiments of the present invention have been described and illustrated in FIGS. 1 to 3, in addition to the listening mode, the recording mode, the reproducing mode, and the editing mode, the key inputs of the present invention are programmed to operate the radio broadcasts for each mode. It is possible.

Such somewhat modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments shall fall within the appended claims of the present invention.

Accordingly, in the present invention, by converting and compressing the FM audio signal transmitted through radio broadcasting into digital data, storing it on the hard disk, and re-editing and storing the stored music data by genre or artist, the user arbitrarily selects and listens to music to be listened to. In addition, it can implement a home music box system by outputting it, and it can solve the costly and inconvenient problems such as finding a record label and purchasing a compact disc or an audio tape by recording over-the-air broadcasting for free.

In addition, by recording the airwave broadcasting as digital data, it is possible to secure excellent sound quality due to the low noise, it is possible to download music to a portable audio player such as an MP3 player, there is an advantage that can be heard in a portable player.

Claims (7)

A radio receiver for selecting and amplifying a desired frequency signal from the radio signal induced in the antenna and converting the signal into an intermediate frequency signal; A voice signal processor for detecting and demodulating an intermediate frequency signal output from the radio receiver; An A / D converter for converting an analog signal output from the voice signal processor into a digital signal according to a predetermined recording control signal; A data converter compressing the digital signal output through the A / D converter; A memory for storing the compressed music file through the data converter; A data restoring unit for restoring music files stored in the memory to original digital data according to a predetermined playback control signal; A D / A converter converting the digital data output from the data restorer into an analog signal; An audio amplifier for amplifying and outputting an analog signal output from the D / A converter; And It controls the tuning of the desired frequency band and recording and playback of the selected voice signal according to a predetermined input command, and re-edits and stores the music files stored in the memory by genre or singer, and then selects a list of schedules according to a predetermined key selection. And a system controller for controlling to output a music file. The method of claim 1, And a recording switch between the audio signal processor and the A / D converter to close the recording loop according to a recording command to form a closed loop. The method of claim 1, And a reproduction switch between the audio signal processing unit and the audio amplifier to block the output of the analog audio signal output from the radio receiver in accordance with a music file reproduction command. The method of claim 1, The system controller, A music recording and reproducing apparatus for over-the-air broadcasting, which automatically adds and records a unique number to a music file when the music file is stored in a memory. The method of claim 1, The system controller, A music recording and reproducing apparatus for over-the-air broadcasting, characterized by a high capacity hard disk driver. The method of claim 1, The music recording and reproducing apparatus, An apparatus for recording and reproducing over-the-air broadcasts, further comprising an interface to connect to an external portable audio player and download music files stored in the memory. Selecting, detecting, demodulating, and outputting a radio broadcast of a predetermined channel; Determining whether a command for recording the output music is input; When the write command is input, converting an input analog signal into digital data and compressing the same at a predetermined compression rate; Assigning a unique number to the compressed music file and storing it in a memory; After performing the above steps, selecting a specific music file by referring to a unique number among the plurality of music files stored in the memory; Sequentially reading the selected music file from the memory, restoring the original music data to original digital data, and converting the converted music signal into an analog signal; And Amplifying the converted analog signal and outputting the converted analog signal through a speaker.