KR100597964B1 - The advanced digital audio contents service system and its implementation method for mobile wireless device on wireless and wired internet communication network - Google Patents

Abstract

The present invention relates to a mobile phone audio service method and service system using a wired / wireless communication network. The present invention relates to an audio file converting means for converting a general audio file and reproducing it with improved sound quality in a voice codec for mobile phones. A storage means for converting the audio file through the file converting means and storing the converted audio file, and a server means for transmitting the audio file requested by the user from the converted audio file stored in the storage means to the user mobile phone through a communication network. It is characterized by including the configuration, through which the advantage of being able to receive the improved sound quality audio service through the voice-only codec suitable for the voice call built in the existing mobile phone.

Audio service, audio conversion, portable, mobile phone,

Description

The audio service method for mobile phone using wired / wireless communication network and service system for implementation thereof {The advanced digital audio contents service system and its implementation method for mobile wireless device on wireless and wired internet communication network}             

1 is a view illustrating an audio service method and a service system for a mobile phone using a wired or wireless communication network according to the present invention;

     2 is a view for explaining an audio file conversion and generation system for a mobile phone according to the present invention.

     Explanation of symbols on the main parts of the drawings

10: service operator 20: user

30: Internet communication network 40: Wireless Internet data communication network

100: Internet server system 110: user storage space

120: user DB

200: wireless Internet server system 210: content DB for sale

220: virtual storage space 230: billing processing system

300: interactive computer for users                 

310: audio file conversion generation system for mobile phones

320: Audio file conversion generation server system for mobile phones

311: digital audio data (MP3, WAV files, etc.)

312: Data for mobile voice codec

400: Portable information device for users

410: audio file playback system for mobile phones

420: Voice Codec for Mobile Phone

       The present invention relates to an audio service system and method using a wired or wireless communication network, and more particularly, to an audio service method for converting and providing an audio file so that high quality audio can be heard even in a mobile phone suitable for an existing voice call.

      According to the recent rapid technological development, a mobile phone ("mobile phone" in the present specification) is a personal information terminal having a wireless communication function, a computing function, and a network function, and includes a mobile phone, a PDA phone, a smartphone, etc. capable of wireless Internet. Therefore, the type of "mobile phone") and its spread are rapidly increasing.

     Such mobile phones are increasingly being upgraded from simple voice call functions to information devices serving as personal computers. The development and change of these functions will be greatly affected by the recent development of wireless communication network technology such as wireless Internet and the development of various hardware (H / W) and software (S / W) constituting a mobile phone.

Now mobile phone users are not satisfied with simple phone functions and have a desire to obtain and share various information using mobile phones. In order to meet the needs of the users, the mobile communication service provider provides various contents related to music such as a ringtone or a karaoke dedicated to a mobile phone through a mobile phone, and the user can download and use it on his mobile phone.

Relatedly, codecs (coding / decoding), which are closely related to the playback of audio in existing mobile phones, are largely codecs that process MIDI data and "voice-only codecs" that process human speech during calls. Currently, mobile phones commercially available in Korea use the codec of "QCELP" or "EVRC", which is a CDMA method.)

However, the voice-only codec, which is optimized for voice calls, which is basically adopted in most mobile phones, emphasizes the frequency band in which the human voice is mainly located, and reduces the other areas. When using the voice-only codec, processing general audio data (hereinafter referred to as "audio file") having a frequency band different from that of human voice may be caused by distortion of the signal. There is a disadvantage in that noise is generated.

Therefore, the current mobile communication service provider only provides audio services based on contents in the form of a ringtone using MIDI.

In addition, the wireless Internet service using the existing mobile phone provided by the mobile communication service provider is given a function of simply selecting and downloading content provided by the service provider unilaterally, so that the user wants the information (for example, the user). Audio files created by the user) can not be played through their mobile phones, and due to the limitation of the internal memory capacity of the mobile phones, even if there is content that the user purchased and downloaded to the mobile phone, If you want to download, the user has to delete the existing content in order to secure the memory, there is an unreasonable point to repurchase the same amount when you want to download the same content in the future.

The present invention has been made in view of the above circumstances, and provides an audio service system and method for a mobile phone using a new type of wired / wireless communication network. The objectives are as follows.

 To provide a new audio service method and system that enables users to listen to high-quality audio even in a mobile phone suitable for the current voice call,

The present invention aims to provide a new audio service method and system that allows users to create and store their own audio files and listen to them at any time.

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The audio service system for a mobile phone according to the present invention for achieving the above object, the audio file conversion means for converting the audio signal reproducible in the audio codec dedicated for mobile phones by adjusting the frequency and gain (Gain) of the general audio file; Storage means for storing the converted audio file through the audio file converting means;
It characterized in that it comprises a server means for transmitting the audio file requested by the user of the converted audio file stored in the storage means to the user mobile phone through a communication network.
In addition, an audio service method for a mobile phone according to the present invention includes an authentication step of authenticating whether a user connected to the server means is a subscribed user in a system for operating an audio service for a mobile phone having a server means; The server means corrects the frequency and gain of the original audio file so that it can be reproduced in the voice codec for mobile phones, and converts the original sound audio file purchased by the authenticated user into a playable audio file in the voice codec for mobile phones. And storing in the storage space, and transmitting the server means to the user mobile phone according to a request of an authenticated user from among the stored audio files.

In addition, another mobile phone audio service method according to the present invention is a system for operating an audio service for mobile phones including audio file converting means and server means, the frequency and gain of the original sound audio file through the audio file converting means ( Converting the data to be reproducible in a voice codec for mobile phones and storing it in a storage space; and when an authenticated user connects to the server means, the server means reproduces the converted audio file. And transmitting the file reproduction program to the user, and transmitting the selected audio file to the user when the user selects any one of the converted and stored audio files.

      Hereinafter, exemplary embodiments of an audio service system and a service method for a mobile phone according to the present invention will be described in detail with reference to the accompanying drawings.

In addition, the terminology used in the present invention was selected as a general term widely used as possible, but in some cases, the term is arbitrarily selected by the applicant, and in this case, the meaning is described in detail in the description of the present invention. The present invention is to be understood as the meaning of terms rather than names.

The present invention aims at converting an existing audio signal to enable high-quality audio to be listened to even in a mobile phone having a voice-only codec. A method of converting a specific audio signal will first be described in detail with reference to FIG. 2. The overall service method and system of the present invention using the audio file conversion generation method will be described later with reference to FIG.

2 is a view for explaining an audio file conversion and generation system according to the present invention.

All the sounds that make up the audio are composed of different frequencies of the harmonics of the fundamental frequency in addition to the fundamental frequency, and most of the frequencies are within 8 kHz based on human voice and music. . In the case of the voice-only codec 420 embedded in the mobile phone, the codec produced based on the 4 kHz voice call uses a 8 kHz sampling method to reduce the quantization error, and emphasizes the frequency corresponding to the voice region. The frequency domain is configured to reduce only the voice during the call.

Therefore, when the audio is reproduced through the voice-only codec 420 for the mobile phone, frequency-specific gain and harmonic distortion are generated, and even in the case of voice, the sound is output in a somewhat distorted sound quality from the original tone. Therefore, the present invention utilizes a correction means 313 for inverting the distortion portion for each frequency by inverting the processing process of the voice-only codec 420 for mobile phones based on the characteristics of the reproduction frequency and corrected through the correction means 313. By encoding the data through the encoding means 314, it is possible to reproduce similarly to the original audio sound, because it is audible and immersed in the reproduction of the final result.
That is, in the case of general audio signals, a much more complicated frequency band and a high-pitched tone and a low-pitched portion of the audio are mixed, so that the audio signal having a different frequency band from the voice is severely distorted when played in the voice codec. You feel the phenomenon. Of course, if there is a separate audio dedicated playback means (e.g., MP3 player) for exclusively reproducing the audio signal (e.g. music file), there would be no problem in reproducing the audio signal as described above. Even in a mobile phone or the like which does not include the audio-only playback means (for example, an MP3 player) and has only a voice-only codec, the audio can be reproduced similarly to the original audio by minimizing distortion of the audio signal. To this end, it will be characterized in that it comprises a correction means 313 for partially converting the frequency and gain of the original audio signal.

In detail, the correction means 313 may include a compressor and a frequency-specific gain that reduce the overall gain of the digital audio within the dynamic range of the earphone or speaker which is the final output terminal of the audio. It is composed of an equalizer (Equalizer) for correcting the difference, it will be described in detail below the operation of the compressor (Equalizer) and equalizer (Equalizer) of the present invention.
First, the description of the "compressor", because the speaker or earphone, which is the final voice output means of the mobile phone, is designed for voice calls, so the dynamic range is small and the output is small. Due to this characteristic, the loudspeaker noise becomes excessive when excessive output is requested, and it is difficult to reproduce small sound properly. That is, the compressor (compressor) of the present invention means performing the operation to adjust the change in the audio volume in the dynamic range (dynamic range) based on the degree of the user generally speaking voice. However, in the use of the compressor, it is possible to change the gain, attack, release, threshold, ratio, and pre-delay value according to the music genre and characteristics so that the music of the same genre is of the same type. It is not recommended to try because it does not consist only of songs.

Next, the "equalizer" will be described. As an audio signal correcting means 313 of the present invention, an equalizer can obtain gain for each frequency band according to a modulation scheme for each frequency band of the voice-only codec 420. (Gain) means that the conversion to the audio signal that can be reproduced similar to the original audio through the adjustment method. That is, since the audio only codec generally uses a sampling frequency of 8 kHz, in order to ensure that the original audio signal is reproduced with high sound quality within the limit of the frequency, the gain is adjusted for each frequency band of the original audio signal. For example, when using a parametric equalizer that is widely known as a frequency control method for an audio signal, the parametric equalizer method allows a frequency band of 8 kHz to 44 kHz to obtain a gain of the corresponding band. In order to reduce as much as possible, the gain is adjusted by applying a wide range as a whole and several times for a narrow range. In addition, the center frequency is reduced to reduce the frequency band up to 6.4 kHz around the frequency of 8 kHz. It is possible to adjust the gain by setting 8kHz and 3.2kHz in width.

In addition to this, ancillary techniques for improving sound quality may be used, but it can be seen that it is largely included in an equalizer in the concept of correcting audio based on a range of sound.

In particular, when audio is transmitted through the voice network of the wireless Internet, such as ARS and call connection sound, audio disconnection may occur due to factors such as frame rate, packet rate loss, etc. When the audio is transmitted through the data network, the above disconnection does not occur, so it will be more efficient.

The audio signal converted by the correction means 313 is input to the encoding means 314, and is converted into a data format suitable for a voice-only codec provided in a user's mobile phone or the like and output. In this regard, the encoding means 314 is an essential component for transmitting an original audio signal without passing through the correction means 313 of the present invention, and is not necessarily limited to the present invention. This is a necessary configuration. In this regard, in the present invention, the above-described correction means 313 and the encoding means 314 are combined and referred to as an audio file conversion generation server system 320 (or an audio file conversion means). The 320 may be configured in hardware, but is mainly programmed to implement a function in software.

Hereinafter, the entire audio service method and system of the present invention using the above-described method of converting an audio file will be described in detail.

1 illustrates an audio service method for a mobile phone using a wired / wireless communication network according to the present invention, and a service system for implementing the same.

First, the user 20 may subscribe to a service to the service operator 10. At this time, the Internet server system 100 of the service operator 10 writes the subscription details of the user 20 in the user DB 120, and allocates the personal storage space 110 of an appropriate size to the user in advance by referring to this. Do it. The storage space 110 means a general storage means.

In addition, the user 20 receives the audio file conversion generation system 310 for the mobile phone from the service operator 10 and installs it in his interactive computer 300 for the user, and the audio file conversion generation system 310 for the installed mobile phone By using this function, you can directly generate and convert the desired audio file.

The audio file conversion generation system 310 provided from the service operator 10 is a program that operates in the same manner as the audio file conversion generation server system 320 existing in the server system 100 in the service operator 10. The above-described correction means 313 and encoding 314 means will be programmed.

At this time, the audio file conversion generation system 310 may be installed (downloaded) and used in the interactive computer 300 of the user 20. However, even without such installation, the service server 10 may be installed in the Internet server system 100. It will be apparent that the audio file conversion generation server system 320 can be used to directly convert and generate the audio file.

That is, the user 20 accesses the Internet server system 100 of the service operator 10 through the Internet communication network 30 and the user storage space 110 provided by the service operator 10 for the converted file. ), And then the user 20 accesses the wireless Internet server system 200 of the service operator 10 through his mobile phone 400 and converts the stored information into his personal storage space 110. The downloaded audio file can be downloaded or streamed for playback.

That is, the audio file conversion generation server system 320 provided by the service operator 10 refers to a kind of program for converting an existing audio file so that it can be listened to with high sound quality even in a general voice dedicated codec. 2 has already been described above.                     

In addition, the user 20 may listen to the music that he / she wants to listen to after directly converting and generating the audio file through the above process, but may directly purchase and use content sold by the service operator 10. This process is described in detail as follows.

When a user 20 having a mobile phone 400 having a voice-only codec accesses the service operator 10 of the present invention and wants to use the service of the present invention, first, the audio file for the mobile phone from the service operator 10 is used. The playback system 410 is downloaded. The audio file reproducing system 410 for a mobile phone will mean a kind of programmed dedicated player capable of reproducing the audio file converted by the present invention. Therefore, the user who has downloaded the mobile phone audio file playback system 410 once will not have to download it again in future use unless the system 410 is deleted.

Therefore, the user 20 searches for the sales content DB 210, in which the service operator 10 has already converted and stored the audio file, purchases the desired audio file, and purchases the purchased audio file in his mobile phone 400 At this time, the audio file playback system 410 for mobile phones, which has been downloaded and installed previously, can be used to listen to the converted audio files purchased by the downloaded or streamed at high quality. Will be.

In other words, the method and system of the ADIUS service of the present invention provided through FIG. 1 may exist in two cases. First, a storage space operated by the service operator 10 by directly converting an audio file that the user desires ( 110), and then play and listen to the stored audio file using his mobile phone 400. Second, the user directly accesses the service operator 10 and converts the service operator 10. It will be the case that you want to listen to the desired audio file from the sales content DB provided by the.

In addition, the wireless Internet server system 200 of the service operator 10 is primarily charged to the user 20 by using the billing processing system 230, the user 20 to the user DB 120 Will update your purchase history. That is, when the same user 20 is connected to the wireless Internet server system 200 through the user's mobile phone 400, the wireless Internet server system 200 is provided by the mobile phone 400 of the user 20 Refer to unique information (mobile phone number, mobile phone model, etc.) or user personal information recorded by the user registration procedure, and internally authenticate the same user 20, and then check the contents of contents purchased by the authenticated user. By showing through the virtual storage space 220 allows for already purchased content can be used without a repurchase procedure.

The virtual storage space 220 is not a storage device that is physically allocated for each user 20, unlike the user storage space 110 described above, the user 20 is a user mobile phone 400. When the user 20 accesses the content, the user 20 purchases the contents by referring to the user DB 120 and the content for sale DB 210 as if they are stored in the storage space. Because of the insufficient memory capacity of the user's mobile phone 400 will enjoy the benefit of being provided with a virtual storage space 220 to solve the problem that could not be stored all, from the perspective of the service operator 10 does not allocate physical storage devices It can provide a useful benefit to the user without reducing the cost and can increase the satisfaction of the user (20).

1 and 2 have been described with reference to the preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope without departing from the spirit or prospects of the present invention. It should be understood that such modified embodiments should fall within the appended claims of the present invention.

      First, when the user wants to receive various audio services through a mobile phone, the user can use the technology of the present invention to receive an improved audio quality through a dedicated voice codec suitable for an existing voice call.

Second, through the present invention, the user can directly listen to the various audio files that he / she wants to listen to on the mobile phone, and can increase the user's convenience because the user can continue to use the purchased content.

Claims (8)

An audio file conversion means for converting a general audio file into a playable audio file in a voice-only codec for a mobile phone by adjusting the frequency and gain of the mobile file; Storage means for storing the audio file converted by the audio file converting means; And a server means for transmitting the audio file requested by the user among the converted audio files stored in the storage means to the user's mobile phone through a communication network. The method of claim 1, The storage means is a mobile service audio service system, characterized in that the content for sale DB for selling the converted audio file to the user. The method of claim 2,      When the user purchases an audio file from the content DB for sale, the server means automatically creates a virtual storage space for the user using the unique information of the user at the time of purchase, and transmits the corresponding file purchased by the user to the user. By inputting the information of the file in the user's virtual storage space, the user authenticated to access the user's virtual storage space so that the desired file can be downloaded or streamed without repurchasing procedure for a mobile phone, characterized in that Audio service system. The method of claim 1, The audio file converting means adjusts the overall gain of the digital audio within the dynamic range of the earphone or speaker, which is the final output terminal of the audio signal, and correcting means for correcting the difference of gains for each frequency band. And audio encoding means for encoding the corrected audio signal into data in a form recognizable by a voice codec for mobile phones. The method of claim 4, wherein The correction means includes a compressor for adjusting the overall gain of the digital audio within the dynamic range of the earphone or the speaker which is the final output terminal of the audio signal provided in the user mobile phone, And an equalizer for adjusting gain for each frequency band based on a sampling frequency of a voice-only codec provided in the user mobile phone. The method of claim 1, The converted audio file stored in the storage means, the audio service system for a mobile phone, characterized in that the user directly converts the audio file through the audio file conversion means and stored. In a system for operating an audio service for a mobile phone having a server means, An authentication step of authenticating whether the user connected to the server means is a subscribed user; The server means converts the original sound audio file purchased by the authenticated user into a playable audio file in the mobile phone audio codec by correcting the frequency and gain of the original audio file so that it can be played in the mobile phone audio codec. And storing in the storage space, And the server unit transmits the stored audio file to the user mobile phone according to the request of the authenticated user. In a system for operating an audio service for a mobile phone having an audio file converting means and a server means, Correcting the frequency and gain of the original audio file through audio file converting means so as to be reproducible in a voice codec for mobile phones, and storing it in a storage space; When an authenticated user accesses the server means, the server means transmitting an audio file playing program capable of playing the converted audio file to the user; The server means, if the user selects any one of the converted and stored audio file, transmitting the selected audio file to the user; audio service method for a mobile phone comprising a.

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