KR20140131735A - Method for reproducing high-quality sound source on mini audio set - Google Patents

Method for reproducing high-quality sound source on mini audio set Download PDF

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Publication number
KR20140131735A
KR20140131735A KR1020130050699A KR20130050699A KR20140131735A KR 20140131735 A KR20140131735 A KR 20140131735A KR 1020130050699 A KR1020130050699 A KR 1020130050699A KR 20130050699 A KR20130050699 A KR 20130050699A KR 20140131735 A KR20140131735 A KR 20140131735A
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KR
South Korea
Prior art keywords
sound source
source data
bit
mini
audio device
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KR1020130050699A
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Korean (ko)
Inventor
유승호
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주식회사 아이리버
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Priority to KR1020130050699A priority Critical patent/KR20140131735A/en
Publication of KR20140131735A publication Critical patent/KR20140131735A/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10305—Improvement or modification of read or write signals signal quality assessment
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
    • G11B20/10027—Improvement or modification of read or write signals analog processing for digital recording or reproduction adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

A method for dividing a 16-bit sound source and a 24-bit sound source by using a mini-audio device, decoding them into separate devices, and reproducing the output through the output portion of the mini-audio device, A sound source selecting step of selecting a sound source; A sound source discrimination step of discriminating whether the data of the selected sound source is 16-bit sound source data or 24-bit sound source data; When the data of the selected sound source is determined as 16-bit sound source data, the mini audio device converts the 16-bit sound source data into an analog signal. If the selected sound source data is determined as 24-bit sound source data, To an analog signal; And a sound source output step of outputting the converted analog signal through an output unit of the mini-audio apparatus.

Description

A method for reproducing a high-quality sound source in a mini-audio device (Method for reproducing high-quality sound source on a mini-audio set)

The present invention relates to a method for reproducing a high-quality sound in a mini-audio device, and more particularly, to a method for reproducing a high-quality sound in a mini-audio device by dividing a 16-bit sound source and a 24-bit sound source by using a mini-audio device, To be reproduced through an output section of the reproducing apparatus.

Generally, the sound source data of the compact disc (CD) and the sound source data of the MP3 format, which are media reproduced from the mini audio device, are based on a sampling rate of 16 bit 44.1 KHz. Therefore, And software resources are mostly configured to reproduce only such 16-bit sound sources.

Reflecting the demand for high-quality sound sources in recent years, services that provide high-quality sound sources produced at high sampling rates of 24-bit 48 kHz, 24-bit 96 kHz, and even 24-bit 192 kHz are getting more and more, and many players for reproducing such 24- .

Such a player is connected to a mini-audio device so that 24-bit sound source data transmitted from the mini-audio device can be converted into an analog signal by its decoding unit and DAC, and then reproduced.

Since the frequency of the 24-bit sound source is higher than that of the 16-bit sound source, the decoding unit and the digital-to-analog converter (DAC) of the player that reproduces the 24-bit sound source consumes a larger current than the decoding unit and DAC of the player that reproduces the 16- Therefore, when a 16-bit sound source other than a 24-bit sound source is reproduced by using a decoding unit for 24-bit sound source reproduction and a DAC, a large number of codecs must be embedded in the decoding thereof. Therefore, the design becomes complicated, There arises a problem that the processing time is not fast.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a decoding apparatus and a DAC for a mini-audio apparatus, which are capable of checking whether a sound source to be reproduced is a 16- And the 24-bit sound source can be output through the speaker of the mini-audio device after decoding and digital-to-analog conversion using the decoder of the external device for 24-bit reproduction and the DAC by using the DAC, And to provide a method for reproducing a high quality sound source in a mini audio device which can reduce the processing time until reproduction is completed without complicating the design of the reproducing section for sound source reproduction.

According to an embodiment of the present invention, there is provided a sound source selection method comprising: a sound source selection step of selecting a sound source desired to be reproduced from a user; A sound source discrimination step of discriminating whether the data of the selected sound source is 16-bit sound source data or 24-bit sound source data; When the data of the selected sound source is determined as 16-bit sound source data, the mini audio device converts the 16-bit sound source data into an analog signal. If the selected sound source data is determined as 24-bit sound source data, To an analog signal; And a sound source output step of outputting the converted analog signal through an output unit of the mini-audio apparatus.

Preferably, in the method, the step of converting the sound source is performed by a codec corresponding to 16-bit sound source data through a decoding unit in the mini audio apparatus. And converting the decoded data into an analog signal through a DAC of a mini audio device.

Preferably, the method further comprises: transmitting 24-bit sound source data selected by the sound source conversion step to an external device connected to the mini-audio device; Decoding the audio data using a codec corresponding to 24-bit sound source data through a decoding unit of the external apparatus; Converting the decoded data to an analog signal through the DAC of the external device; And transmitting the converted analog signal to the mini-audio device.

Preferably, the sound source discriminating step compares the extension of the sound source data file with the extension list of the previously set 24-bit sound source data file to determine whether the sound source data is a 24-bit sound source data file.

Preferably, in the method, the sound source discriminating step discriminates whether the sound source data is a 24-bit sound source data file or 16-bit sound source data by reading the information recorded in the header of the sound source data file.

According to the method for reproducing a high quality sound source in the mini audio device of the present invention, in the step of determining whether the sound source data selected by the user is 16 bits or 24 bits, the extension of the sound source data file is registered in advance as an extension of the 24 bit sound source data file Whether or not Or by reading the information recorded in the header of the sound source data file, the discrimination method becomes very simple.

Since the 16-bit sound source data after the discrimination is decoded by the corresponding codec built in the conventional mini audio device and the 24-bit sound source data is transmitted to and decoded by the external device for 24-bit reproduction, the decoding step becomes very fast, Only the 24-bit sound source data needs to be decoded. Therefore, the number of codecs can be reduced, which simplifies the design and shortens the processing time until reproduction. Since the 16-bit sound source data is decoded using the corresponding codec built in the mini audio device, the power consumption of the external device for 24-bit reproduction is considerably reduced compared with the method of reproducing all the sound source data by 24-bit for reproducing the 24- There is an effect that can be done.

In addition, in the case of an external device for 24-bit reproduction, 16-bit sound source data is decoded using a corresponding codec built in the mini-audio device, compared with the conventional method in which all sound source data is reproduced in an external device for stable reproduction of 24- Therefore, it is possible to save a considerable amount of power consumption of the external device.

FIG. 1 is a block diagram for reproducing a high-quality sound source in a mini audio device according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a method for reproducing a high-quality sound source in a mini-audio device according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for reproducing a high-quality sound source in a mini-audio device of the present invention will be described in detail with reference to preferred embodiments.

FIG. 1 is a block diagram for reproducing a high-quality sound source in a mini audio device according to an embodiment of the present invention. In FIG. 1, the sound source memory unit 12 stores 16-bit sound source data and 24-bit sound source data. The sound source memory unit 12 may be an external memory such as a USB device, an SD card, an external hard disk, or a CD-ROM connected to the mini audio device, or may be a built-in memory of the mini audio device.

The audio decoding unit 16 of the mini audio device is for decoding 16-bit sound source data transmitted from the sound source memory unit 12 through the audio CPU 10 of the mini audio device, and includes a plurality of CODECs It has built-in.

According to the specifications of the mini-audio device, the audio decoding unit 16 may incorporate a codec for decoding 24-bit sound data. However, most mini-audio devices currently used have a codec having only a 16-bit sound data decoding function. Hereinafter, an embodiment of the present invention will be described with reference to a mini-audio device having a built-in codec having only a 16-bit sound source data decoding function.

The audio DAC 18 converts the 16-bit sound source data decoded by the corresponding codec in the audio decoding unit 16 into an analog signal.

On the other hand, the 24-bit external device 22 includes a decoding unit connected to the mini-audio device and having a codec for decoding 24-bit sound source data, and a decoder 24 for converting the 24-bit sound source data of the decoded digital signal into an analog signal DAC is built in.

The mini audio device and the external device for 24-bit reproduction 22 can be connected by various wired and wireless methods such as a USB port, a Bluetooth type or a dedicated cable. The analog signal of the 16-bit or 24-bit sound source data output from the 24-bit external device 22 and the audio DAC 18 is amplified through an amplifier (not shown) and then output through the output 25 of the mini- do. The audio CPU 10 controls the above components.

A method for reproducing a high-quality sound source in a mini-audio device according to the present invention is as follows.

FIG. 2 is a flowchart illustrating a method for reproducing a high-quality sound source in a mini-audio device according to an embodiment of the present invention.

 First, the user selects sound source data to be played back from the sound source data stored in a storage medium such as a USB device, an SD card, an external hard disk, a CD-ROM, or the built-in memory of the mini audio device through the interface of the mini audio device (S101) .

When the sound source data is selected by the user, the audio CPU 10 of the mini audio device determines whether the selected sound source data is 16-bit sound source data or 24-bit sound source data (S103).

At this time, the audio CPU 10 can determine whether the selected sound source data is a 24-bit sound source data file by comparing the extension of the selected sound source data file with the extension list of the previously set 24-bit sound source data file. For this purpose, the manufacturer of the user or the mini audio device can register the extension of the 24-bit sound source data file in the mini audio device in advance. When the 24-bit playback external device 22 is connected to the mini-audio device, it is also possible to set an extension list of the reproducible 24-bit sound source data file to be registered in the mini-audio device.

For example, the sound source data file having the extension flac or wav of the sound source data file can be registered in the mini audio device in advance so as to be determined as a 24-bit sound source data file. Of course, it is a matter of course that not only flac or wav but also other extensions can be registered as 24-bit sound source data. As described above, the audio CPU 10 determines the sound source data having an extension other than that designated by the extension of the 24-bit sound source data as 16-bit sound source data.

Here, in implementing the step of determining whether the selected sound source data is 16-bit sound source data or 24-bit sound source data, in addition to the method of confirming the extension, the audio CPU 10 reads the information recorded in the header of the sound source data file, It is possible to determine whether the selected sound source data file is 24-bit sound source data or 16-bit sound source data.

If it is determined in step S103 that the sound source data requested by the user to reproduce is 16-bit sound source data or 24-bit sound source data, and that the corresponding sound source data to be reproduced is 16-bit, Converts the selected 16-bit source data to an analog signal. That is, the 16-bit sound source data selected by the user is transmitted to the audio decoding unit 16 in the mini-audio device, and the audio decoding unit 16 performs decoding using the codec corresponding to the transmitted 16-bit sound source data. When the decoding of the 16-bit sound source data is completed, the audio DAC 18 converts the decoded sound source data into an analog signal (S105). Thereafter, the analog signal is amplified by an amplifying unit (not shown) and then outputted through an audio output unit 25 such as a speaker (S109).

On the other hand, if it is determined in step S103 that the selected sound source data is 24-bit sound source data, the sound source data is transmitted to the 24-bit playback external device 22 in the mini audio device. The decoding unit of the 24-bit playback external device 22 performs decoding using a codec corresponding to the transmitted 24-bit sound source data, and the DAC converts the decoded data into an analog signal. When the conversion to the analog signal is completed, the external device 22 transmits the converted analog signal to the mini audio device again (S107).

Thereafter, as in the case of 16-bit sound source data, the sound is output through the audio output unit 25 such as a speaker through an amplification process (S109).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

10: audio CPU 12: sound source memory unit
16: Audio decoding unit 18: Audio DAC
22: External device for 24-bit reproduction 25: Audio output section

Claims (5)

A method for reproducing a high quality sound source in a mini audio device,
A sound source selecting step of selecting a sound source desired to be reproduced from a user;
A sound source discrimination step of discriminating whether the data of the selected sound source is 16-bit sound source data or 24-bit sound source data;
When the data of the selected sound source is determined as 16-bit sound source data, the mini-audio device converts the 16-bit sound source data into an analog signal. If the selected sound source data is determined to be 24-bit sound source data, A sound source conversion step of converting 24-bit sound source data into an analog signal; And
And outputting the converted analog signal through the output unit of the mini-audio device
The method of claim 1, further comprising: 2. The method according to claim 1,
Decoding the audio data using a codec corresponding to 16-bit sound source data through a decoding unit in the mini audio device; And
Converting the decoded data into an analog signal through the DAC of the mini audio device
A method for reproducing a high quality sound source in a mini audio device 2. The method according to claim 1,
Transmitting the selected 24-bit sound source data to an external device connected to the mini-audio device;
Decoding the audio data using a codec corresponding to the 24-bit sound source data through a decoding unit of the external device;
Converting the decoded data into an analog signal through a DAC of the external device; And
And transmitting the converted analog signal to the mini-audio device
The method of claim 1, further comprising: The method according to any one of claims 1 to 3,
And comparing the extension of the sound source data file with an extension list of a 24-bit sound source data file set in advance to determine whether the sound source data is a 24-bit sound source data file. The method according to any one of claims 1 to 3,
And determining whether the sound source data is a 24-bit sound source data file or 16-bit sound source data by reading information recorded in a header of the sound source data file.
KR1020130050699A 2013-05-06 2013-05-06 Method for reproducing high-quality sound source on mini audio set KR20140131735A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111863041A (en) * 2020-07-17 2020-10-30 东软集团股份有限公司 Sound signal processing method, device and equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111863041A (en) * 2020-07-17 2020-10-30 东软集团股份有限公司 Sound signal processing method, device and equipment

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