KR20140131734A - Method for reproducing high-quality sound source on PC - Google Patents

Method for reproducing high-quality sound source on PC Download PDF

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Publication number
KR20140131734A
KR20140131734A KR1020130050698A KR20130050698A KR20140131734A KR 20140131734 A KR20140131734 A KR 20140131734A KR 1020130050698 A KR1020130050698 A KR 1020130050698A KR 20130050698 A KR20130050698 A KR 20130050698A KR 20140131734 A KR20140131734 A KR 20140131734A
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KR
South Korea
Prior art keywords
sound source
bit
source data
data
analog signal
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Application number
KR1020130050698A
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Korean (ko)
Inventor
유승호
Original Assignee
주식회사 아이리버
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Priority to KR1020130050698A priority Critical patent/KR20140131734A/en
Publication of KR20140131734A publication Critical patent/KR20140131734A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/22—Arrangements for sorting or merging computer data on continuous record carriers, e.g. tape, drum, disc
    • 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
    • G11B20/02—Analogue recording or reproducing
    • G11B20/04—Direct recording or reproducing
    • 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

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (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 PC, decodes them into separate apparatuses, and then reproduces them through an output unit of the PC, comprising the steps of: A selection step; 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 16-bit sound source data is converted into an analog signal through the PC internal device. 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 the PC output unit.

Description

[0001] The present invention relates to a method for reproducing a high-quality sound source on a PC,

More particularly, the present invention relates to a method for reproducing a high-quality sound source in a personal computer, and more particularly, a 16-bit sound source and a 24-bit sound source are separated using a PC and decoded through a separate device, Gt; to < / RTI >

Generally, the sound source data of the compact disc (CD) and the sound source data of the MP3 format, which are mainly reproduced on a PC, are based on a sampling rate of 16 bit 44.1 KHz. Therefore, hardware and software resources And is configured to reproduce only such a 16-bit sound source.

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 can convert 24-bit sound source data, which is connected to a PC and is transmitted from a PC, into an analog signal by its own decoding unit and DAC, and can reproduce the analog signal.

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 to overcome the above-mentioned problems in the prior art, and it is an object of the present invention to provide a sound reproducing apparatus and a sound reproducing method, The 24-bit sound source can be decoded and digital-analog converted using a decoding unit of a 24-bit reproduction external device and the DAC, and output through a built-in speaker of the PC, thereby saving decoding time And a method of reproducing a high-quality sound source using a PC that can reduce the processing time until reproduction is completed without complicating the design of the playback section for sound source playback.

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 16-bit sound source data is converted into an analog signal through the PC internal device. If the selected sound source data is determined as 24-bit sound source data, To an analog signal; And a sound output step of outputting the converted analog signal through the PC output unit.

Preferably, the method further comprises: a step of decoding the sound source conversion step using a codec corresponding to 16-bit sound source data through a decoding unit in the PC; And converting the decoded data decoded through the DAC of the PC into an analog signal.

Preferably, the method further comprises transmitting the 24-bit sound source data selected by the sound source conversion step to an external device connected to the PC; 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 PC.

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 using the PC of the present invention, in the step of discriminating whether the sound source data selected by the user is 16 bits or 24 bits, whether the extension of the sound source data file is registered as an extension of the 24- 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 existing PC, and the 24-bit sound source data is transmitted to the external device for 24-bit reproduction and decoded, the decoding step becomes very fast, and the external device for 24- Only the 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.

In addition, in the case of an external device for 24-bit reproduction, 16-bit sound source data can be decoded and reproduced using a corresponding codec built in the PC, compared with the conventional method of reproducing all sound source data in an external device for stable reproduction of 24- , 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 from a PC according to an embodiment of the present invention.
2 is a flowchart illustrating a method of reproducing a high-quality sound source on a PC according to an embodiment of the present invention.

Hereinafter, a method for reproducing a high-quality sound source in a PC according to 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 from a PC 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 PC, or may be a built-in memory of the PC.

The PC decoding unit 16 is for decoding 16-bit sound source data transmitted from the sound source memory unit 12 through the CPU 10 of the PC, and includes a plurality of CODECs therein. According to the specifications of the PC, the PC decoding unit 16 may incorporate a codec for decoding 24-bit sound source data, but most PCs currently used have a built-in codec having only a 16-bit sound source data decoding function. Hereinafter, an embodiment of the present invention will be described with reference to a PC having a CODEC having only a 16-bit sound source data decoding function.

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

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

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

According to the above configuration, a method for reproducing a high-quality sound source on a PC according to the present invention is as follows.

2 is a flowchart illustrating a method of reproducing a high-quality sound source on a PC according to an embodiment of the present invention.

First, the user selects sound source data to be played back from one or more sound source data stored in an external memory such as a USB device, an SD card, an external hard disk, a CD-ROM, or the like via a PC interface (S101).

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

At this time, the CPU 10 of the PC 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. To this end, it is possible to set the extension of the 24-bit sound source data file to be registered in the PC through the user or the Internet in advance, or when the 24-bit external device 22 is connected to the PC, It may be set to register.

For example, the sound source data file having the extension flac or wav of the sound source data file can be registered in the PC 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 CPU 10 of the PC determines sound source data having an extension other than that specified by the extension of the 24-bit sound source data as 16-bit sound source data.

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 CPU 10 of the PC reads information recorded in the header of the sound source data file , It can be implemented to determine whether the selected sound source data file is 24-bit sound source data or 16-bit sound source data.

On the other hand, if it is determined in step S103 that the corresponding sound source data to be reproduced through the discrimination of the sound source data selected by the user is 16-bit sound source data, the PC converts the selected 16-bit sound source data into an analog signal. That is, the 16-bit sound source data selected by the user is transmitted to the PC decoding unit 16 in the PC, and the PC 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 PC 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 a PC output unit 25 of a speaker or the like (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 from the PC to the 24-bit playback external device 22. [ 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 transfers the converted analog signal to the PC again (S107).

Thereafter, as in the case of 16-bit sound source data, the sound is output through the PC 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 exemplary 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 gist of the invention.

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

Claims (5)

In a high quality sound source reproducing method in a PC,
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 discriminated as 16-bit sound source data, the 16-bit sound source data is converted into an analog signal through the internal device of the PC, and if the data of the selected sound source is discriminated as 24-bit sound source data, A sound source conversion step of converting 24-bit sound source data into an analog signal; And
A sound source output step for outputting the converted analog signal through the PC output unit
And reproducing the high-quality sound source in the PC. 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 PC; And
Converting the decoded data to an analog signal through the DAC of the PC
And reproducing the high-quality sound source in the PC. 2. The method according to claim 1,
Transmitting the selected 24-bit sound source data to an external device connected to the PC;
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
Transferring the converted analog signal to the PC
And reproducing the high-quality sound source in the PC. The method according to any one of claims 1 to 3,
And comparing the extension of the sound source data file with a list of extensions 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.
KR1020130050698A 2013-05-06 2013-05-06 Method for reproducing high-quality sound source on PC KR20140131734A (en)

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KR1020130050698A KR20140131734A (en) 2013-05-06 2013-05-06 Method for reproducing high-quality sound source on PC

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115103286A (en) * 2022-04-29 2022-09-23 北京瑞森新谱科技股份有限公司 ASIO low-delay acoustic detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115103286A (en) * 2022-04-29 2022-09-23 北京瑞森新谱科技股份有限公司 ASIO low-delay acoustic detection method

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