KR0150163B1 - Recording apparatus and method thereof - Google Patents

Abstract

[Technical field to which the invention described in the claims belong]

Digital audio player

[Technical Challenges to Invent]

In the digital audio reproducing apparatus, audio information and corresponding additional information are reproduced.

[Summary of the solution of the invention]

The apparatus for reproducing the information of the digital recording medium on which the header information indicating the presence or absence of the additional information, the second coded additional information and the first coded audio information is sequentially recorded, receives the information recorded on the recording medium and receives the digital data. Means for converting the digital data into a first decoding means; first decoding means for decoding and outputting digital data; second decoding means for decoding and outputting digital data; and a first input terminal connected to the first decoding means. An input terminal connected to the second decoding means, a switching means connected to the output terminal of the switching means, means for reproducing the switching output signal as an audible signal, and analyzing header data output from the first decoding means, and additional information. Controlling the temporary switching means to connect the second decoding means and the reproduction means, and controlling the temporary switching means of the audio information to connect the first decoding means and the reproduction means. It is composed of a control unit.

[Important Uses of the Invention]

Before the audio information such as a song is reproduced in the digital audio reproducing apparatus, information additional to the original audio information is first reproduced to provide a source of actual audio information.

Description

Apparatus and method for reproducing information of a digital recording medium having additional information

1 is a diagram showing the configuration of an apparatus for reproducing conventional digital record carrier information.

2 is a diagram showing a configuration of an apparatus for reproducing information of a digital recording medium having additional information according to the present invention.

3 is a diagram showing a recording format of a general digital recording medium and a digital recording medium having additional information.

4 is a diagram showing a flow of reproducing information of a digital recording medium having additional information according to the present invention.

The present invention relates to an apparatus and method for reproducing information of a digital recording medium, and more particularly, to an apparatus and method for reproducing information of a digital recording medium having additional information.

In general, the configuration of an apparatus for reproducing audio information recorded in digital form is shown in FIG. Referring to FIG. 1, the recording medium 11 is a digital recording medium in which audio information such as songs is recorded. The system controller 12 controls the overall operation of the digital audio device. The servo controller 13 generates various servo control signals for controlling the reproduction operation of the demodulator 14 under the control of the controller 12. The demodulator 14 converts the audio information recorded on the recording medium 11 into an electrical signal under the control of the servo controller 13. If the recording medium 11 is an optical disc, it is a pick-up unit, and if the recording medium 11 is a magnetic material such as a tape, it is a means including a head. An amplification and error correction unit 15 amplifies the reproduced RF signal output to the demodulator 14, converts it into a digital form, and corrects an error. The data decoder 16 decodes the encoded data output from the amplification and error correction unit 15 and outputs the decoded data. The D / A converter 27 converts the digital data output from the data decoder 16 into an analog signal and outputs the analog signal. The amplifier 18 reproduces the audio signal output from the D / A converter 17 to a speaker or a headphone.

In FIG. 1, the recording medium 11 is a digital recording medium used for a digital audio device, and may be a CD, MD, DCC, DAT, or the like. At this time, if the recording medium 11 is a CD (Compact Disc) series, the digital audio device as shown in FIG. 1 is a disc drive device. If the recording medium 11 is a digital audio tape as DAT, the digital audio device as shown in FIG. 1 is a tape. It becomes a driving device. That is, if the recording medium 11 is a CD series, the demodulator 14 is a pickup device, and if the DAT series is a demodulator 14, the head is a head. The controller 12 controls the overall operation of the digital audio device, and the servo controller 13 controls the driving of the mechanism of the demodulator 14 by the controller 11 to read the information recorded on the recording medium 11.

The amplification and error correction unit 15 amplifies the RF signal output from the demodulator 14, converts it into a digital signal, and then corrects the error. The data decoder 16 decodes the error corrected digital audio data and restores the original data. That is, the data read from the recording medium 11 is data encoded at the time of recording. Therefore, the data decoder 16 performs a function of decoding the encoded data back to the original form at the time of recording. The decoded data is then converted into an analog audio signal by the D / A converter 17 and then amplified by the amplifier 18 and reproduced through a speaker or headphones.

However, the conventional digital audio apparatus as described above does not generate the composer, writer, singer name and song name corresponding to each music as an audio signal. That is, in the digital audio device having the display unit, the above additional information can be processed as text information and displayed on the display unit, but such additional function information cannot be reproduced as an audio signal. In addition, in the conventional digital audio device, there is a problem in that the additional information cannot be effectively displayed when the display portion is small in size, and when the display portion is not present, the additional information cannot be displayed.

Accordingly, an object of the present invention is to provide an apparatus and method for reproducing additional information as an audio signal together with main digital audio data in a digital audio device.

Another object of the present invention is a device capable of reproducing audio information of a recording medium in which digital audio information is recorded in the order of header data, additional information data, and main audio data, and the encoding of the additional information data and main audio data is recorded differently. And providing a method.

In order to achieve the above object of the present invention, there is provided an apparatus for reproducing information of a digital recording medium in which header information, second coded additional information, and first coded audio information are sequentially recorded. Means for receiving information recorded on a medium and converting the information into digital data, first decoding means for first decoding and outputting the digital data, second decoding means for second decoding and outputting the digital data, and first Switching means having an input terminal connected to the first decoding means and a second input terminal connected to an additional second decoding means, connected to an output terminal of the switching means, and means for reproducing a switched output signal as an audible signal; Analyze the dead data output from the first decoding means, and control the switching means when the additional information is used to control the second decoding means and the Connect the production means, and is characterized in that by controlling the switching means when one audio information consisting of a control unit for connecting the first decoding means and the reproducing means.

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

2 is a diagram showing the configuration of a digital audio device according to the present invention. The recording medium 21 is a digital recording medium in which main audio data such as songs and additional information data representing characteristics of the main audio data are recorded. Here, the main audio data and the additional information data use different encoding schemes. The key input unit 20 generates a key signal for determining an operation mode of the digital audio device. A controller 22 sets a mode according to the output of the key input unit 20 to control the overall operation of the digital audio device. The servo controller 23 generates various servo control signals for controlling the reproduction operation of the demodulator 24 under the control of the controller 22. The demodulator 24 converts audio information recorded on the recording medium 21 into an electrical signal under the control of the servo controller 23. If the recording medium 21 is an optical disc, it is a pick-up unit, and if the recording medium 21 is a magnetic material such as a tape, it is a means including a head. The amplification and error correction unit 25 amplifies the reproduced RF signal output to the demodulator 24, converts it into a digital form, and corrects an error. A first decoder 26 decodes the first encoded main audio data output from the amplification and error correction unit 25, and converts the first encoded main audio data into original audio data. The first D / A converter 27 converts the main audio data output from the first decoder 26 into an analog audio signal and outputs the converted audio signal. The second decoder 28 decodes the second coded additional information data output from the first decoder 26 into original data and outputs the original data. The 2D / A converter 29 converts the additional information data output from the second decoder 28 into an analog audio signal and outputs the converted audio signal. The switch circuit 30 has a first input terminal connected to the output terminal of the first D / A converter 27, a second input terminal connected to the output terminal of the second D / A converter 29, and a control terminal connected to the controller 22. The switch circuit 30 controls the formation of the second reproduction passage and the first reproduction passage by the output of the controller 22 to selectively output the additional information and the main audio signal. The amplifier 31 amplifies the audio signal output from the switch circuit 30 and outputs it to the speaker and the headphone.

FIG. 3 is a diagram showing the form of a data stream recorded on the recording medium 21, and (3A) is a header data storing address information and status information of audio data following the form of a general data stream. data) and main audio data. And (3B) is composed of header data which stores the address and status information of the audio data, additional information data which stores additional information on the main audio data, and a stream of main audio data.

Here, in FIG. 3, the state information of the header data includes data indicating whether additional information data exists in a subsequent data stream. In the present invention, the additional information data and the main audio data may be encoded in different forms. That is, the main audio data is encoded as a song coded by PCM (Pulse code Modulation) method and recorded on the recording medium 11, and the additional information data is ADPCM (Advanced Pulse Code Modulation) or MPEG (Moving Picture Expert Group) method Compression encoding method is used. The reason for compressing and encoding the additional information data is to reduce the size of the additional information data. In the present invention, it is assumed that the audio data is encoded by the PCM method and the side information data is compressed and encoded by the ADPCM or MPEG method.

The type of data stream recorded on the digital recording medium 11 is recorded as shown in FIG. 3 (3A) or (3B). In the data stream of FIG. 3, the audio data means audio information such as a song, and the additional information data includes a song name, a singer name, a composer name, and a song writer name of the music corresponding to the audio information in the form of Sound. The additional information means header information, and the header data is information indicating a recording position of the audio data and the additional information and the presence or absence of additional information. At this time, if there is no additional information according to the presence or absence of the additional information, the data stream is recorded on the recording medium 11 in the form of (3A), and if there is additional information, the data stream is in the form of (3B). Is written on.

The recording medium 21 is a digital recording medium used in a digital audio device, and may be a CD, MD, DCC, DAT, or the like. If the recording medium 21 is a CD (Compact Disc) series, the digital audio device as shown in FIG. 2 is a disc driving device. If the recording medium 21 is a digital audio tape as DAT, the digital audio device as shown in FIG. It becomes a driving device. That is, if the recording medium 21 is a CD series, the demodulator 24 is a pickup device, and if the DAT series is a demodulator 24, it is a head. The controller 22 controls the overall operation of the digital audio device, and the servo controller 13 controls the drive of the mechanism of the demodulator 24 by the controller 21 to read the information recorded on the recording medium 21.

The amplification and error correction section 25 amplifies the RF signal output from the demodulation section 24, converts it into a digital signal, and then corrects the error. At this time, the controller 22 reads the header data from the first decoder 26 and checks whether there is additional information in the stream of the corresponding data. In this case, when the additional information does not exist, the controller 22 controls the switching circuit 30 to connect the output of the first D / A converter 27 to the amplifier 31. The first decore 26 decodes the digital audio data of the PCM method, which is output after error correction, and converts the digital audio data into original audio data. The decoded audio data is then converted into an analog audio signal by the first D / A converter 27, and the analog audio signal is transferred to the amplifier 28 through the switching circuit 30, and amplified by the amplifier 28 to be a speaker or a headphone. Is played through. At this time, the reproduced audio signal becomes main information such as a song.

However, if there is additional information data in the header data output from the first decoder 26, the controller 22 controls the switching circuit 30 to reproduce the additional information and then play the audio data again. First, the controller 22 outputs a second switching signal, and thus the switching circuit 30 connects the output terminal of the second D / A converter 29 and the input terminal of the amplifier 31 to form a second regeneration path. The second decoder 26 decompresses the compressed coded data output from the first decoder 26 to decode the original data, and the second D / A converter 29 converts the second decoded data into an analog side information signal. do. The analog information signal is amplified by the amplifier 31 and reproduced through the speaker or the headphone. At this time, the additional information becomes additional information about the song (song song name, singer name, composer name, songwriter name, etc.). After the reproduction of the additional information data is finished, the controller 22 controls the switching circuit 30 to connect the output terminal of the first D / A converter 27 and the input terminal of the amplifier 31 to form a first reproduction path. Then, the audio data is reproduced through the first reproduction passage formed as described above.

4 shows a process of reproducing a general audio data stream such as 3A or an audio data stream having additional information such as 3B in the digital audio device of the present invention as described above.

First, the controller 22 receives mode key information output from the key input unit 20 in step 411, and checks the operation mode of the digital audio device in step 413. In this case, the user operates the key input unit 20 to generate a corresponding key signal in order to operate the digital audio device in a reproduction mode. The user sets a mode for reproducing additional information and a mode for reproducing in a normal mode. Therefore, when the key signal output from the key input unit 20 is a normal mode key, the control proceeds to step 423 to generate a second switching signal. That is, the controller 22 controls the switching circuit 30 to connect the output of the first D / A converter 27 to the amplifier 31. The first decoder 26 decodes the PCM-type digital audio data that is error-corrected and outputs the original audio data. Thereafter, the decoded audio data is converted into an analog audio signal by the first D / A converter 27, and the analog audio signal is transmitted to the amplifier 28 through the switching circuit 30, and the speaker or the headphone amplified by the amplifier 28 Is played through. At this time, the reproduced audio signal becomes main information such as a song.

However, in the case of the output mode for reproducing the additional information in step 413, the controller 22 receives the header data received through the first decoder 26 in step 415. In step 417, the controller 22 analyzes the received header data and checks whether there is additional information. If there is no additional information in the header data in step 417, the controller 22 repeats the above operation by forming a first playback path in step 423.

However, if it is determined in step 417 that there is additional information, the controller 22 forms a second playback passage in step 419. That is, the control unit 22 outputs the second switching signal in step 419, so that the switching circuit 30 connects the output terminal of the second D / A converter 29 and the input terminal of the amplifier 31 to form a second regeneration path. The second decoder 26 decompresses the compressed coded data output from the first decoder 26 to decode the original data, and the second D / A converter 29 converts the second decoded data into an analog side information signal. do. Then, the analog information signal is amplified by the amplifier 31 and reproduced through the speaker or the headphone. At this time, the additional information becomes additional information about the song (song song name, singer name, composer name, songwriter name, etc.).

In the state where the second reproduction path is formed as described above, the controller 22 determines whether reproduction of the additional information data is terminated in step 421. At this time, if the additional information is being reproduced, a second regeneration path is formed in step 419 to repeatedly reproduce the additional information data. However, if the end of the reproduction of the additional information data is detected in step 421, the controller 22 controls the switching circuit 30 to connect the output terminal of the first D / A converter 27 and the input terminal of the amplifier 31 in step 423 to perform the first reproduction. Form a passage. Then, the audio data is reproduced through the first reproduction passage formed as described above.

As described above, when the audio information recorded on the digital recording medium is reproduced, the additional information of the corresponding song may be reproduced first. In this case, since the additional information is a song name, a singer name, a composer name, and a song writer name of the corresponding song, the source of the actual music can be output before playing the corresponding song.

Claims (6)

An apparatus for reproducing header information indicating the presence or absence of additional information, information of a digital recording medium on which second coded additional information and first coded audio information are sequentially recorded, the apparatus comprising: receiving information recorded on the recording medium; Means for converting the digital data; first decoding means for first decoding and outputting the digital data; second decoding means for secondly decoding and outputting the digital data; and first first decoding means for the first input terminal. Switching means connected to the second input terminal and the second decoding means, connected to the output terminal of the switching means, means for reproducing a switched output signal as an audible signal, and output from the first decoding means. Analyzes header data and controls the switching means when the additional information is used to connect the second decoding means and the reproduction means, and audio information. Digital audio playback devices, characterized in that by controlling the switching means adapted to control the connection of the first decoding means and the reproducing means. The digital audio reproducing apparatus according to claim 1, wherein the audio information is a song, and the additional information comprises a song name, a singer name, a composer name, and a song writer name of the song. 3. The method of claim 2, wherein the first decoding means is a means for decoding the first coded PCM audio data, and the second decoding means is means for decoding the second coded PDMC audio data. Digital audio player. A method of reproducing header information indicating the presence or absence of additional information, information of a digital recording medium on which second coded additional information and first coded audio information are sequentially recorded, wherein the header information is read and analyzed in a reproduction mode. And audio information without additional information in the header information analysis process, first decoding the audio information and playing the audible sound in the header information analysis process, and adding the additional information when there is additional information in the header information analysis process. And decoding the audio information by decoding and reproducing the audio information after the additional information is reproduced as audible sound. 5. The digital audio reproduction method according to claim 4, wherein the audio information is a song, and the additional information includes a song name, a singer name, a composer name, and a song writer name of the song. 6. The method of claim 5, wherein the first decoding process decodes the first encoded PCM audio data, and the second decoding process decodes the second coded PDMC audio data. .