KR20130003897U - Voice output system according to channel - Google Patents

Abstract

The present invention relates to a channel-specific voice output system that can output voice for different uses using a stereo channel. The voice output system of the present invention stores educational content information and map content information using different channels, and provides the educational content information and map content information using different output units.

Description

VOICE OUTPUT SYSTEM ACCORDING TO CHANNEL}

The present invention relates to the field of voice output system, and more particularly, to a channel-specific voice output system that can output voice for different uses using a stereo channel.

In the past, an Internet education or study company provided education CDs or MP3s for kindergarten or lower grade students, listened to them through the speaker of the voice output system with the parents who guide the children, and if necessary, the company provided them separately for parents. Parents had previously learned materials such as study guides and commentaries to educate students. 1 is a block diagram showing the configuration of a conventional audio output system.

In the conventional method, parents who guide students when the study companies provide educational contents such as CDs or MP3s should spend time in advance for efficient education, and learn the study guides or commentary for parents provided by the companies in advance. If you are listening to the content through the speaker, explain it properly, or if you do not learn in advance, read the instructions while the children are listening to the content. However, in the case of how parents learn in advance, it may be difficult to secure free time, such as working couples. Even if they have learned and learned in advance, the contents of the educational contents that are played in real time with the child can be read to students. There is a problem that is difficult to educate. In addition, in the case of not learning in advance, there is a problem that it is difficult for parents to properly check the learning progress of students or to educate students in real time while reading the guidelines.

Korean Patent Publication No. 10-1983-0009870 (published Dec. 23, 1983)

The present invention provides a voice output system for each channel that can output a voice for different uses using a stereo channel.

The voice output system of the present invention stores educational content information and map content information using different channels, and provides the educational content information and map content information using different output units.

In addition, the audio output system of the present invention, a media player (media player) for setting the audio path information by analyzing the header of the file including the educational content information and the map content information; An audio codec for storing the educational content information and the map content information using the different channels; An audio switch configured to output the educational content information and the map content information to the different output units using the audio path information; A first output unit configured to output the educational content information; And a second output unit configured to output the map content information.

According to the present invention, students and parents listen to information stored in different channels by using different transmission apparatuses such as speakers and earphones, so that parents do not have to invest extra time and listen to necessary information in real time. Two-way education can be provided according to the child's listening progress, improving the quality of education.

1 is a block diagram showing the configuration of a voice output system.
2 is an exemplary view showing a header format of an MP3 file according to an embodiment of the present invention.
3 is a block diagram of a voice output system according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of a preferred embodiment of the present invention. However, in the following description, if there is a risk of unnecessarily obscuring the subject matter of the present invention, a detailed description of well-known functions or configurations will be omitted. In addition, it should be understood that the following embodiments are merely intended to describe the present invention and not to limit the present invention.

In case of educational contents, it is produced in MP3 or WAV file format and stored in two different channels in stereo format for better quality of contents. However, this is to provide good quality content, and in case of student education content, the stereo file format, which is good quality content as described above, is not required. Therefore, one channel stores educational contents for children in a mono form, and another channel stores contents of commentary or guidelines for parents as map contents. In addition, the general audio output system outputs the contents of the stereo file only to the earphone when the earphone is plugged in, and outputs only the speaker to the speaker when the earphone is not plugged in. In order to be notified, information must be input in a specific field of the stereo file header, and the voice output system recognizing the information of the specific field outputs respective channel information to the first output unit and the second output unit simultaneously. In the present embodiment, the first output unit may include a speaker, and the second output unit may include an earphone. However, the first output unit and the second output unit are not limited to the above-described speakers and earphones.

2 is an exemplary view showing a header format of an MP3 file according to an embodiment of the present invention.

As shown in FIG. 2, 25 and 26 bits (a, b) in the header of the MP3 file indicate a field for indicating a channel mode. Channel mode is set to stereo mode when 25 and 26 bits are 00, joint stereo mode when 01, dual channel mode when 10, and single channel mode when 11. Indicates. Definition of each channel mode of MP3 file is shown in the following Table 1.

streo mode In this mode, the encoder makes no use of potentially existing correlations between the two input channels. It can, however, negotiate the bit demand between both channel, ie give one channel more bits if the other contains silence or needs less bits because of a lower complexity.
=> Stereo (sometimes called "Discrete Stereo" to distinguish it from Joint Stereo) encodes the left and right signals independently, redistributing bits between the channels as required to get the best encoding. joint streo mode In this mode, the encoder will make use of a correlation between both channels. The signal will be matrixed into a sum ("mid"), computed by L + R, and difference ("side") signal, computed by LR, and more bits are allocated to the mid channel. This will effectively increase the bandwidth if the signal does not have too much stereo separation, thus giving a significant gain in encoding quality.
=> Joint Stereo converts the Left and Right channels into two different signals: a "Mid" or "Sum" channel (Left plus Right, mono) and a "Side" or "Difference" channel (the difference between the two channels, Left minus Right). This allows recordings with relatively little stereo separation to be encoded more efficiently-more bits can be allocated to the Sum channel because there is relatively little difference information to encode. Another result of the more efficient encoding is that files encoded as Joint Stereo with variable or average bit rate will be slightly smaller than comparable files encoded as Stereo. When using the higher bit rate choices, there will be less difference in quality between Joint Stereo and Stereo, and less difference in file size where variable or average bit rate is used. dual channel mode In this mode, the 2 channels will be totally independently encoded. Each channel will have exactly half of the bitrate. This mode is designed for applications like dual languages encoding (ex: English in one channel and French in the other). Using this encoding mode for regular stereo files will result in a lower quality encoding. single channel mode The input will be encoded as a mono signal. If it was a stereo signal, it will be downsampled to mono. The downmix is calculated as the sum of the left and right channel, attenuated by 6 dB.

On the other hand, 27, 28 bits (c, d) in the header of the MP3 file is a field used when the channel mode is a joint stereo mode. In this embodiment, 27 bits are used to control on / off of the first output and 28 bits are used to control the second output. As an example, when the 27 and 28 bits are 11, the educational content information is output to the first output unit, the map content information is output to the second output unit, and when the 27 and 28 bits are 10, the first output unit is output. Only educational content information is output, and when the 27 and 28 bits are 01, the content for guidance is output only to the second output unit. If the 27 and 28 bits are 11 or 01 and the second output unit is not plugged into the connection jack of the audio output system, the educational content is output only to the first output unit.

Therefore, in the present invention, the channel mode uses 10 (Dual channel) as a 25,26 bit value to indicate that information for a different purpose is stored for each channel, and 27 bits are 28 bits to indicate the first output on / off. Defines to indicate the second output on / off.

3 is a block diagram of a voice output system according to an embodiment of the present invention.

As shown in FIG. 3, the audio output system of the present invention connects an audio switch 140 with an audio codec 130 to adjust an audio path in real time to adjust the audio path in real time. Make this possible. When the media player 120 reads the MP3 file 110 and writes it as an output terminal, the PCM (education content data) and educational content data for each channel to which an audio interface of the CPU is input are input. PCM data converted to pulse code modulation data and educational content data is converted to an audio codec 130 including an analog / digital converter function using a left PCM channel (LPC). The PCM data converted from the map content data is transmitted to the audio codec 130 using the right PCM channel (RPC).

In addition, the media player 120 reads 25 to 28 bits in the fields of the MP3 file 110 header to determine whether the first output unit 150 or the second output unit 160 outputs the content to the audio path. To set audio path information (configuration) of the audio switch 140. As an exemplary embodiment, when the value of 25 to 28 bits of the MP3 file 110 header is 1011, the media player 120 uses the audio switch 140 to provide educational content information to the audio path of the first output unit 150. The controller may output the map contents through the audio path of the second output unit 160.

The audio codec 130 converts the PCM data for each channel received from the media player 120 into an analog signal and recognizes the second output unit 160 if it is plugged into a connection jack (not shown). Since the connection to the second output unit 160, the map content information is output to the second output unit 160, and if the second output unit 160 is not plugged into the connection jack, the first output unit 150 Outputs educational content information. In this case, when there are two first output units 150, the educational content information is output to the respective first output units 160.

 The audio codec 130 transmits an analog signal to the audio switch 140, and the audio switch 140 changes the audio path according to the audio path information set in the media player 120 to output a left analog signal including educational content information. Regardless of the number of the first output unit 150, the first output unit 150 is controlled to be output to all the first output units 150, and the second output unit 160 includes only the right analog signal including the map content information in both channels. Control the output. When the channel mode of the MP3 file 110 is not 1011, the voice output system 100 of the present invention outputs the same information to the first output unit 150 or the second output unit 160. In addition, regardless of the channel mode of the MP3 file can be selected to operate in a mode that differently controls the information output to the first output unit 150 and the second output unit 160 in the Menu Setting provided separately Can provide functionality.

Although the present disclosure has been described in connection with some embodiments, it should be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the present invention as understood by those skilled in the art to which the present invention belongs. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

100: audio output system 110: MP3 files
120: media player 130: audio codec
140: audio switch 150: first output unit
160: second output unit

Claims (5)

Voice output system,
A voice output system for storing educational content information and map content information using different channels, and providing the educational content information and map content information using different output units. The method of claim 1,
A media player configured to set audio path information by analyzing a header of a file including the educational content information and the map content information;
An audio codec for storing the educational content information and the map content information using the different channels;
An audio switch configured to output the educational content information and the map content information to the different output units using the audio path information;
A first output unit configured to output the educational content information; And
And a second output unit configured to output the map content information. The method of claim 2,
The media player,
And setting the audio path information using a 25 to 28 bit field in a header of a file including the educational content information and the map content information. The method of claim 3,
The first output unit includes a speaker,
And the second output unit comprises an earphone. The method of claim 3,
In order to control whether the 27-bit field is on / off of the first output unit and the 28-bit field is on / off of the second output unit among headers of the file including the educational content information and the map content information. Used, voice output system.

Images