KR20150049411A - Broadcasting method and system using inaudible sound and Mixer - Google Patents

Abstract

Disclosed is a guidance broadcasting method for outputting a sound through speakers installed in a noise area which includes the steps of: generating meta data which is related to the sound outputted through the speaker from a sound signal before a sound signal is outputted through at least one speaker among the speakers installed in the noise area; converting the meta data into an inaudible sound signal; and generating a mixing signal by mixing the sound signal with the meta data which is converted into the inaudible sound signal.

Description

 TECHNICAL FIELD [0001] The present invention relates to a broadcasting method using a sound wave of a non-audible range, a broadcasting system, and a mixer used therein,

The present invention relates to a broadcasting method using a sound wave in a non-audible band, a broadcasting system, and a mixer used therein.

Currently, various broadcasting systems such as a public address system, an announcement system in public transit, and a broadcast system for TV output are used to transmit information by sound.

However, the broadcasting system for sound transmission which is conventionally constructed and used has a problem that (i) the object to which the information is transmitted can hear the sound well, (ii) it can understand the language well, and (iii) , And the delivery of the information is limited. For example, it is difficult for a foreigner, a hearing-impaired person, or a speaker outputting the contents of a broadcasting system to transmit information to a person located at a remote location or a person located at a place with a large background noise.

In addition, in a situation where a large number of smart devices are expected to be introduced, it is difficult to transmit the contents of the information output through the broadcasting system to the smart device, and it is difficult to provide a high value service to the user by utilizing the information.

In addition, in the case of a vehicle broadcasting system, although the location information is transmitted through a broadcasting system to sound, a separate interface is required to provide position information to an additional apparatus connected to the broadcasting system. In general, in case of a large-sized vehicle, communication interfaces between the in-vehicle devices are different in each country, and thus it is difficult for the additional device to support various interfaces.

(Patent Document 1) Korean Patent Laid-Open Publication No. 10-2006-0095346 (destination notification system and method using voice recognition in mobile communication terminal)

(Patent Document 2) Korean Patent Laid-Open No. 10-2011-0087742 (Sign Language Interpretation System for the Deaf, apparatus and method thereof)

According to an embodiment of the present invention, there can be provided an announcement method, an announcement system, and a mixer used in the announcement method using a sound wave in the non-audible range.

According to another embodiment of the present invention, a broadcasting method using a sound wave of a non-audible range, a broadcasting system, and a mixer used therefor can be provided.

According to an embodiment of the present invention, there is provided a broadcasting method for outputting sound through speakers installed in a noise region,

Generating metadata from the sound signal, which is associated with sound output through the speaker, before outputting the sound signal through at least one of the speakers installed in the noise region;

Converting the metadata into a sound wave signal of a non-audible range;

Mixing the audio signal converted into the sound signal of the non-audible range with the sound signal to generate a mixing signal,

And the mixing signal is output through the speaker.

According to an embodiment of the present invention,

Determining whether the acoustic signal includes acoustic wave data in a non-audible range before the step of generating the metadata,

 The step of generating the metadata may include performing a step of generating the metadata when the acoustic signal does not include the acoustic wave data of the non-audible range - the sound wave data of the existing non-audible range.

According to an embodiment of the present invention,

And determining whether to maintain or change existing non-audible sound data when the sound signal includes sound wave data of an existing non-audible range.

According to an embodiment of the present invention,

And deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,

The generating of the mixing signal may be a step of mixing the sound wave data of the non-audible range converted in the step of converting the sound signal into the sound signal of which the sound wave data of the existing non-audible range is deleted.

According to an embodiment of the present invention,

And receiving an acoustic signal before being output to the speaker,

The metadata is generated from the acoustic signal received by the input, and

Wherein the acoustic signal input by the input terminal is provided to generate the mixing signal through a bypass path,

The bypass path may be a path that bypasses the step of generating the metadata and the step of converting the metadata into an audio signal of an invisible band.

According to an embodiment of the present invention,

And continuously outputting the metadata converted into the sound wave signal of the non-audible range through the speaker at predetermined time intervals after the mixing signal is outputted through the speaker.

According to an embodiment of the present invention, there is provided a mixer for use in an acoustic system for outputting sound to the outside,

A sound recognition engine for recognizing sound from the sound signal and outputting the meta data, which is related to the sound outputted to the outside, before outputting the sound signal to the outside;

A sound wave generating engine for converting the metadata into a sound wave signal in an audible range;

And a combiner for generating a mixing signal obtained by mixing the sound signal of the non-audible range with the sound signal.

The sound recognition engine determines whether or not the sound signal includes sound wave data in a non-audible range, and the sound signal includes sound wave data in a non-audible range - 'sound wave data in a conventional non-audible range' If not, the metadata may be generated.

The acoustic recognition engine may be configured to determine whether to maintain or change existing non-audible sound data when the acoustic signal includes sound wave data of an existing non-audible range.

A mixer according to an embodiment of the present invention includes:

And a filter for deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,

The combining unit may mix the sound wave data of the non-audible range converted by the sound wave generating engine with the sound signal whose sound wave data of the existing non-audible range is deleted by the filter.

Wherein the sound wave generating engine outputs the metadata converted into the sound wave signal of the non-audible frequency band to the combining unit at predetermined time intervals after the mixing signal is output to the outside,

And the combining unit may output the metadata received at the predetermined time interval to the speaker.

A mixer according to an embodiment of the present invention includes:

An input terminal capable of receiving an acoustic signal before being output to the outside;

An output terminal receiving the mixing signal generated by the coupling unit and outputting the mixed signal to the outside; And

And a bypass path for providing a path through which the acoustic signal received through the input terminal can move to the coupling unit.

Wherein when the mixing signal generated by the sound wave generating engine is not input from the sound wave generating engine, the combining unit receives the sound signal through the bypass path, It may be to output the acoustic signal as it is.

When the combining unit receives the sound signal (referred to as 'first sound signal') at time T1 and receives the sound signal (referred to as 'second sound signal') at time T2 after a predetermined time elapses,

The coupling portion

Mixes the first sound signal and the metadata generated from the first sound signal by the sound wave generating engine to generate a mixing signal (referred to as a 'first mixing signal') to output to the output stage, and

Mixes the second sound signal and the metadata generated from the second sound signal by the sound wave generating engine to generate a mixing signal (referred to as a 'second mixing signal') and outputs the mixed signal to the output terminal,

The coupling portion

And outputs the first mixed signal to the output terminal at a predetermined time interval during a time before the acoustic signal of the non-audible range generated from the second acoustic signal is received Lt; / RTI >

A mixer according to an embodiment of the present invention includes:

and a position estimation module for estimating a position at which the sound signal is received by using at least one of i) at least one of GPS, mobile communication network, and WiFi, ii) an inertia sensor, and sound recognized in the sound signal,

The metadata may include a position estimated by the position estimation module.

According to another embodiment of the present invention, there is provided a broadcasting method for outputting sound,

Generating metadata from the sound signal, which is associated with sound output to the outside, before outputting the sound signal to the outside;

Converting the metadata into a sound wave signal;

Mixing the audio signal converted into the sound wave signal of the non-audible range with the sound signal to generate a mixing signal; And

And compressing the mixing signal.

According to another aspect of the present invention,

Determining whether the acoustic signal includes acoustic wave data in a non-audible range before the step of generating the metadata,

 The step of generating the metadata may include performing a step of generating the metadata when the acoustic signal does not include the acoustic wave data of the non-audible range - the sound wave data of the existing non-audible range.

According to another aspect of the present invention,

And determining whether to maintain or change the existing non-audible sound data when the sound signal includes sound wave data in the existing non-audible range.

According to another aspect of the present invention,

And deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,

The generating of the mixing signal may be a step of mixing the sound wave of the non-audible range converted in the step of converting the sound signal into the sound signal of which the sound wave data of the existing non-audible range is deleted.

According to another aspect of the present invention,

And continuously outputting the metadata, which is converted into the sound wave signal of the non-audible range, through the outside at predetermined time intervals after the mixing signal is outputted through the outside.

In the above-described methods or mixers,

What is associated with sound,

i) converting at least a portion of the sound output through the speaker into text;

ii) converting information associated with at least a portion of the sound output through the speaker into text;

iii) converting to an Internet address that includes information associated with at least a portion of the sound through the speaker; And

iv) an ID representing any one of i) to iii) above;

Or the like.

According to one or more embodiments of the present invention, even when the existing broadcasting system is used as it is, even if the noise of the broadcast output is very severe or the initial output level is low, can do.

According to one or more embodiments of the present invention, it is possible to precisely provide necessary information to a person who can not understand a language containing sound information (e.g., foreigner and hearing-impaired person) can do.

According to one or more embodiments of the present invention, even if a person in a space in which the corresponding sound information is delivered at the time of outputting the broadcast, It is possible to confirm the broadcast contents passed through.

According to one or more embodiments of the present invention, it is possible to transmit information to various smart devices located in a space through which output is transmitted by digitizing information output through broadcast, while using the existing broadcasting system as it is, It is possible to provide a user-customized service.

According to one or more embodiments of the present invention, when location information is required for a device installed in a large-sized vehicle, it is possible to implement location information transfer interfaces different for each vehicle type, It is possible to greatly enhance the compatibility of the equipment to be installed.

FIG. 1 is a view for explaining an announcement broadcasting system using a mixer according to an embodiment of the present invention, and FIG.
2 is a view for explaining a signal output from a mixer according to an embodiment of the present invention,
3 is a diagram for explaining a broadcasting method according to an embodiment of the present invention,
FIG. 4 is a diagram for explaining an example of using the announcement broadcasting system according to an embodiment of the present invention,
5 is a diagram for explaining a broadcasting system using a mixer according to an embodiment of the present invention,
6 is a view for explaining a mixer according to an embodiment of the present invention,
7 is a view for explaining a broadcasting method according to another embodiment of the present invention,
8 is a diagram for explaining a non-audible frequency band.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thickness of the components is exaggerated for an effective description of the technical content.

Where the terms first, second, etc. are used herein to describe components, these components should not be limited by such terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The expression that component A and component B are connected (or connected or fastened or coupled) to each other in the description and / or claims of the present application means that component A and component B are directly connected or that one or more of the other components Quot; is used in the meaning including to be connected by an intermediary.

Also, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons for explaining the present invention.

1 is a view for explaining a broadcasting system using a mixer according to an embodiment of the present invention.

Referring to FIG. 1, a broadcasting system 100 using a mixer according to an embodiment of the present invention includes a storage unit 10 for storing a sound source (also referred to as 'sound data'), An amplifier (AMP) 40 for amplifying a signal output from the DAC 20, the mixer 30 and the mixer 30 and a speaker 50 for outputting a signal output from the amplifier 40 to the outside acoustically, . ≪ / RTI >

In this embodiment, although the speaker 50 is shown as one, it will be understood by those skilled in the art that a plurality of the speakers 50 can also be configured. In the present specification, when the mixer 30 refers to outputting the mixing signal to the speaker 50, even if the amplifier 40 is not explicitly mentioned, it is amplified through the amplifier 40, As shown in FIG.

The sound source stored in the storage unit 10 means any data that can be output as sound through a speaker, such as a file or a song file in which a sound is recorded.

The DAC 20 converts the sound source into an electrical signal that can be output from the speaker 50. In the present specification, for the purpose of explanation, a sound source (or sound data) converted into an electrical signal will be referred to as an acoustic signal.

The mixer 30 receives the analog sound signal output by the DAC 20 and performs a predetermined mixing operation.

The mixer 30 recognizes the sound from the acoustic signal output from the DAC 20 before outputting the acoustic signal output from the DAC 20 to the speaker 50, - a sound signal which is related to the sound output from the speaker, converts the generated metadata into a sound signal of the non-audible spectrum, and mixes the sound signal of the non-audible spectrum with the sound signal Can be generated.

On the other hand, according to an embodiment of the present invention,

i) converting at least a portion of the sound output to the outside into text;

ii) converting information associated with at least a portion of the sound output to the outside into text;

iii) converted to an Internet address containing information associated with at least a portion of the sound output to the outside;

iv) a unique ID indicating any one of i) to iii) above;

Or the like.

For example, in the case of i), when the sound output to the outside is "Hello, the next station is Shinchon station. If you want to get off at the next station, please use the right door" Quot; use ".

ii) For example, when the sound output to the outside is "Hello, the next station is Seoul station, please use the right door for the next station." Metadata is " If you go to exit 1 of Seoul Station, there is KTX history ".

For example, in the case of iii), when the sound output to the outside is "Hello, the next station is Seoul station, please use the right door for the next station." For example, www.arex.or.kr/ "(where is the URL that introduces Seoul Station).

iv) For example, "Hello, the next station is Seoul Station. If you are going to come to the next station, please use the right door." For example, the metadata may be an ID such as '0031'. Here, the ID '0031' is an example, and the server (not shown) maps and stores information such as " 0031 ", " KTX history exists when the next station goes to Seoul station, .

While the above examples of metadata have been described by way of example, the metadata in the present invention need not be limited to the reverse. For example, in the case of an emergency broadcast such as an emergency, the sound output to the outside is an emergency state, such as "It is an emergency, so please evacuate slowly because of a fire", the metadata is generated based on the positional information provided by the positional estimation unit 35, Information may be used to guide the evacuation route at the current location.

That is, the sound recognition engine 33 can generate metadata indicating the current position and the evacuation path if it is determined that the sound signal indicating emergency such as 'emergency' or 'fire' is included in the sound signal .

Meanwhile, in this specification, the term 'external' may be, but not limited to, devices such as, for example, a speaker or a transmission unit. The term " external " means, in a broad sense, any device that receives a signal output from the mixer 30.

According to an embodiment of the present invention, the mixer 30 outputs the mixed signal to the speaker 50, and then receives another acoustic signal from the DAC 20 and outputs the converted metadata to the sound wave signal of the new non- It is possible to continue outputting the metadata converted into the sound wave signal of the non-audible range to the speaker 50 at predetermined time intervals until the audio signal is provided. This operation will be described in more detail with reference to FIG.

FIG. 2 is a block diagram of a mixer 30 according to an embodiment of the present invention, at times t ₁ , t ₂ , ..., t _N , t _{N + 1} , t _{N + 2} . (Spectrogram) of the mixing signal outputted in order in the frequency band. Here, the times t ₁ , t ₂ , ..., t _N , t _{N + 1} , t _{N + 2} . May be constant or may not be equal to one another, and may be suitably selected by those skilled in the art.

2, the mixer 30 mixes a signal to the sound signal (S1) (hereinafter "first acoustic signal") and the metadata (M1) (hereinafter, the first meta data ") to the time t ₁ . Here, the first metadata is metadata generated by recognizing the first acoustic signal.

When the predetermined time t ₂ the mixer 30 outputs a first metadata (M1) to the speaker (50).

In this way, whenever the predetermined time comes, the mixer 30 outputs the first meta data M1 to the speaker 50, and can perform it until the time t _n .

The mixer 30 outputs a signal obtained by mixing the sound signal S2 (hereinafter referred to as a 'second sound signal') and the meta data M2 (hereinafter, 'second meta data') at time t _{n + 1} . Here, the second metadata is metadata generated from the second sound signal.

When the predetermined time becomes t _{N + 1} , the mixer 30 outputs the second meta data M2 to the speaker 50. In this way, each time a predetermined time is elapsed, the mixer 30 outputs the second metadata M2 to the speaker 50, and this operation causes a new sound signal (hereinafter referred to as a " third sound signal & Until the received metadata is converted into a sound wave signal of a new non-audible range.

2, the mixer 30 generates the first metadata from the first sound signal when it receives the first sound signal, mixes the first metadata with the first sound signal, . Thereafter, the first meta data converted into the sound signal of the non-audible frequency band is repeated at predetermined time intervals until the meta data converted into the sound signal of the new non-audible range is received by receiving the second sound signal, 50).

Upon receiving the second acoustic signal, the mixer 30 generates second metadata from the second acoustic signal, mixes the second metadata and the second acoustic signal, and outputs the mixed data to the speaker 50. Thereafter, the second meta data converted into the sound signal of the non-audible frequency band is repeated at a predetermined time interval until the meta data converted into the sound signal of the new non-audible range is received by receiving the third sound signal, 50). Hereinafter, the mixer 30 can operate in the same manner for the subsequently received acoustic signals.

The mixer 30 that operates as described above includes an input terminal 31, an output terminal 32, an acoustic recognition engine 33, a sound wave generating engine 34, a coupling section 36, (39).

The input terminal 31 can receive an acoustic signal output from the DAC 20. [

The output stage 32 can output the mixing signal mixed by the combining unit 36 to the amplifier 40.

The acoustic signal received through the input terminal 31 is provided to the coupling portion 36 through the bypass path 39. As described above, since the bypass path 39 exists, the acoustic signal once received through the input terminal 31 can be output to the amplifier 40 even if no metadata is generated. Further, even if the sound recognition engine 33 or the sound wave generating engine 34 has a problem, the sound of the broadcasting system can be outputted to the amplifier 40 through the mixer.

The sound recognition engine 33 analyzes the sound signal received at the input terminal 31 or the sound signal input to the combining section 36 through the bypass path 39 to recognize the sound.

The sound recognition engine 33, for example, receives the sound signal received at the input terminal 31 in the form of an analog signal, converts it into digital data, and recognizes the sound included in such digital data.

The sound recognition engine 33 generates the metadata from the recognized sound. The metadata may include, for example,

i) converting at least some of the recognized sounds into text;

ii) converting information associated with at least part of the recognized sound into text;

iii) converted to an Internet address containing information associated with at least a portion of the sound output to the outside;

iv) a unique ID indicating any one of i) to iii) above;

Or the like.

For a more detailed description of these, please refer to the previous description.

The sound wave generation engine 34 may convert the metadata generated by the sound recognition engine 33 into a sound wave signal in the non-audible range. The non-audible frequency band will be described in detail with reference to FIG.

Referring to FIG. 8, the non-audible range is indicated by a shaded area. In the present specification, the non-audible band means a frequency band that can not be recognized by the human auditory sense in the sound band, and the non-audible band varies depending on the intensity of the sound pressure of the outputted sound.

Referring to FIG. 8, it can be seen that, even if the sound pressure is relatively lower than other frequencies in the vicinity of 4000 Hz, human beings can perceive sound. On the other hand, it can be seen that as the frequency becomes lower or higher as a whole, about 4000 Hz, the intensity of the sound pressure must be increased in order for the human to perceive the sound.

Therefore, in consideration of the intensity of the sound pressure outputted from the speaker 50, the non-audible range should be determined. Note that the output range of the speaker 50 is to be considered. The non-audible range should be determined within the output range of the speaker 50. [

That is, in consideration of both the output range of the speaker 50 and the intensity of the sound pressure, the metadata must be converted into a frequency band that can not be perceived by the human auditory sense.

The combining unit 36 mixes the metadata converted into the sound wave signal of the non-audible range by the sound wave generating engine 34 and the sound signal received through the bypass path 39 to generate a mixing signal. Here, an example of the mixing signal output by the combining unit 36 may be the one shown in Fig.

The mixer 30 may further include at least one of a GPS sensor, a Wi-Fi communication unit and a mobile communication communication unit 37 and a position estimation unit 35 and a DAC 38 in order to be installed in, for example, Lt; / RTI >

The position estimating unit 35 can estimate the position using at least one of a GPS sensor, a Wi-Fi communication unit, and a mobile communication communication unit 37. [ Here, the position may be, for example, a position at the time when the input terminal 31 receives the sound signal.

Although not shown, the position estimating unit 35 can estimate the position using the result sensed by the inertial sensor. In this case, the position can be estimated using at least one of the GPS sensor, the Wi-Fi communication unit, and the mobile communication communication unit 37 and the sensing result of the inertial sensor.

The position estimating unit 35 can also estimate the position using the sound recognized by the acoustic recognition engine 33. [ For example, in the sound recognized by the sound recognition engine 33, if there is data indicating "the next station is Gangnam station ", the position estimator 35 estimates the present position as a certain point before arriving at Gangnam station It can be used to do.

The position estimated by the position estimating section 35 may be provided to the acoustic recognition engine 33. [ The acoustic recognition engine 33 may include the position provided from the position estimation unit 35 in the metadata.

The position estimating unit 35 may be configured to determine whether the sound recognized by the acoustic recognition engine 33 includes at least one of the GPS sensor, the Wi-Fi communication unit, and the mobile communication communication unit 37, The sensed result can be used to estimate the position - e.g., the position of the device on which the mixer 30 or the mixer 30 is mounted.

The DAC 38 converts the metadata generated by the sound wave generation engine 34 into an analog signal, and provides the analog signal to the combining unit 36.

('Second sound signal') is input at time T1 after a predetermined time elapses, and the sound signal (the 'second sound signal' Quot;).

The combining unit 36 mixes the first sound signal and the metadata generated from the first sound signal by the sound wave generating engine 34 to generate a mixing signal (referred to as a 'first mixing signal' .

The combining unit 36 mixes the second sound signal and the metadata generated from the second sound signal by the sound wave generating engine 34 to generate a mixing signal (referred to as a 'second mixing signal'), (32).

Here, the combining unit 36 outputs metadata generated from the first sound signal to the output terminal (not shown) during a time period before the first mixing signal is output and the second sound signal is received and the fish metadata is input from the second sound signal, 32 at predetermined time intervals.

For example, as described with reference to Fig. 2, the combining unit 36 can repeatedly output the sound wave signal in the non-audible range at predetermined time intervals.

A variety of methods can be implemented in which the combining unit 36 can repeatedly output the sound wave signal in the non-audible range at predetermined time intervals.

For example, when the sound wave generating engine 34 receives the meta data (first meta data) from the sound recognition engine 33, it converts it into a sound wave signal in the non-audible range, It is possible to provide the DAC 38 with the first metadata converted into the sound wave signal of the non-audible band at predetermined time intervals until the metadata (second metadata) is received.

In other words, when the sound wave generating engine 34 receives the meta data (first meta data) from the sound recognition engine 33, the first meta data is converted to the sound wave signal of the non-audible range, (38). The combining unit 36 may output the first metadata received from the DAC 38 to the output terminal 32 at a predetermined time interval until receiving the second metadata thereafter.

3 is a diagram for explaining a broadcasting method according to an embodiment of the present invention.

Referring to FIG. 3, a broadcasting method according to an embodiment of the present invention includes mixing metadata with a sound signal before the sound signal is output through the outside. Each of the steps to be described below can be performed by the mixer described with reference to Figs. 1, 5, and 6, for example.

The broadcasting method according to an embodiment of the present invention includes a step S101 of receiving an audio signal SS ('first sound signal') to be output to the outside (S101) A step S103 of recognizing the sound in the first acoustic signal S103, a step S105 of generating the metadata MD from the sound recognized in the step S103, and a step S105 of recording the metadata MD generated in the step S105 in the non- A step S109 of mixing the sound wave signal CMD in the non-audible range converted in step S107 and the first sound signal received in step S101 to generate a mixing signal MS; (S111) of outputting the mixing signal (MS) generated in step S109 to the outside, and when a predetermined time has elapsed after the mixing signal (MS) is outputted to the outside in step S111, (S113) of outputting the sound wave signal (CMD) of the sound signal to the outside.

The broadcasting method according to an embodiment of the present invention may further include the step of providing the sound signal received by the input terminal 31 to a mixing signal generating step (S109) through a bypass path . The mixing signal generating step (S109) mixes the acoustic signal provided through the bypass path and the metadata converted into the sound wave signal of the non-audible range.

Here, the bypass path means a path for bypassing the step of generating metadata and the step of converting the metadata into an audio signal of an invisible band.

 A broadcasting method according to an embodiment of the present invention is a method of receiving another acoustic signal ('second sound signal') to be output to the outside or converting a meta data generated from a second sound signal into a sound wave of a non- (S115; YES), the operation of step S101 and subsequent steps is repeated.

(S115: N0) in which the second acoustic signal is received or the metadata - converted from the second acoustic signal into the sound wave of the non-audible range - is generated, the sound wave signal of the non- (Step S113) of outputting the CMD.

As described above, the broadcasting method exemplified in FIG. 3 can be applied to the broadcasting system described in FIG. 1 or the broadcasting system described with reference to FIG.

1 and 2, the broadcasting system described with reference to Figs. 1 and 2 further includes a microphone (not shown) or a storage unit 10 And a microphone (not shown) in place of the DAC 20. When the mixer 30 is configured to include a microphone (not shown), the mixer 30 receives the sound signal input through the microphone (not shown) and performs the operation. That is, the mixer 30 receives an acoustic signal input through a microphone (not shown), and performs a predetermined mixing operation on the acoustic signal. Here, the predetermined mixing operation is as described with reference to FIG. 1 and FIG.

As described above, the broadcasting system described with reference to FIGS. 1 and 2 and the modified examples thereof and the broadcasting method described with reference to FIG. 3 can be useful when applied to a region where noises are severe. That is, it can be effectively applied to an environment where the microphone is not easy to recognize the sound outputted from the speaker due to the noise such as the subway history or the bus stop.

Also, the broadcasting method described with reference to Figs. 1 to 3 may be useful when a foreigner who is not broadcasting in the native language is listening to the broadcasting. That is, it is possible to receive a broadcast such as a subway announcement broadcast, a TV broadcast, and a product service guide through a public hall broadcast.

Also, the broadcasting method described with reference to Figs. 1 to 3 can be useful to people who miss broadcasting because they are concentrated elsewhere. In other words, if you are listening to music on the subway or talking to a friend, you can miss the broadcast, but you can see the missed broadcast with the repeated sound wave signal. It is possible to inform people that they are concentrating on other tasks that a major disaster broadcast is being output on TV. You can communicate information about emergency situations to people shopping while listening to music.

 4 is a view for explaining an example of using a broadcasting system according to an embodiment of the present invention.

Referring to FIG. 4, a broadcasting system 300 according to an embodiment of the present invention may be interworked with a mobile device 200. [ Here, the mobile device 200 may be, for example, a smart phone, a PDA, a notebook, a tablet PC, and the like, but those skilled in the art should understand that the present invention is not limited to such devices.

The broadcasting system 300 may be, for example, the broadcasting system 100 described with reference to FIG. 1, the broadcasting system described with reference to FIG. 5, or the broadcasting system using the mixer described with reference to FIG. Also, the broadcasting system 300 may be a broadcasting system that has implemented the broadcasting method described with reference to FIG. 3 or the broadcasting method described with reference to FIG.

First, the operation of the mobile device 200 will be described assuming that the broadcasting system 300 is the broadcasting system 100 of FIG.

The mobile device 200 can recognize the sound output through the broadcasting system 300 (that is, the sound output through the speaker), and extracts the meta data if the recognized sound contains the meta data.

The mobile device 200 recognizes the extracted metadata to inform the user visually, audibly, and / or tactually, or transmits the metadata to the server (not shown) and receives information related to the metadata from the server And informs the user.

A mobile device 200 according to an embodiment of the present invention includes a computer processor 201 operated by computer instructions, a microphone 203 capable of receiving sound waves, a user interface unit 205, a memory 207, And an application 209.

The application 209 can be loaded into the memory 207 under the control of the computer processor 201 to perform the operation.

The microphone 203 can receive sound waves output from the announcement system 300. [

The application 209 can determine whether or not there is metadata in the sound wave received by the microphone 203, and convert it into a form recognizable by the user if there is metadata. The user-recognizable form can be, for example, a form that can be recognized by visual, auditory, or tactile sense.

Alternatively, the application 209 determines whether or not there is metadata in the sound wave received by the microphone 203. If the metadata is present, the application 209 transmits the metadata to a server (not shown) And converts the received data into a form recognizable by the user.

Alternatively, the functions performed by the application 209 may be included in the form of hardware by a mobile device, or may be included as part of the OS.

Now, the operation of the mobile device 200 will be described on the assumption that the broadcasting system 300 is the broadcasting system described with reference to FIG.

The microphone 203 of the mobile device 200 can receive sound waves output through a speaker (not shown) of the TV receiver 511 and the application 209 can receive the sound data received by the microphone 203, And if there is metadata, it can be converted into a form recognizable by the user.

Meanwhile, the mobile device 200 can directly receive the image data stored in the electromagnetic wave transmitted through the transmission unit 509 without passing through the TV receiver 511, and further includes an antenna (not shown) can do.

The signal received by the antenna (not shown) is an electromagnetic wave, and the data corresponding to the sound among the image data stored in the electromagnetic wave may include the meta data modulated in the non-audible range according to an embodiment of the present invention.

The mobile device 200 may further include a component (not shown) that demodulates electromagnetic waves.

The application 209 can determine whether or not there is meta data in the broadcast signal received by the antenna, and convert it into a form recognizable by the user if the meta data is present.

Alternatively, the application 209 may determine whether or not the metadata corresponding to the sound is included in the video data stored in the broadcast signal received by the antenna, and if the metadata includes the metadata, transmit the metadata to a server (not shown) , Receives data corresponding to the meta data from the server, and converts the received data into a format recognizable by the user.

5 is a diagram for explaining a broadcasting system using a mixer according to an embodiment of the present invention.

5, a broadcasting system using a mixer according to an embodiment of the present invention includes a storage unit 501 for storing an uncompressed video signal and an acoustic signal, a mixer 503, an encoder 507, 509).

The mixer 503 may perform the same operation as the mixer 30 described with reference to FIG. That is, the mixing signal may be generated from the uncompressed video signal and the audio signal, and may be output to the encoder 507. [

The mixer 503 receives the video signal and the sound signal, converts the sound signal into a mixed signal as described above, and outputs the mixed signal to the encoder 507 together with the video signal.

For example, the mixer 503 can output the mixing signal as shown in FIG. 2, like the mixer 30.

The encoder 507 can output the mixing signal output from the mixer 503 using a lossy compression coding technique. The lossy compression coded data output from the encoder 507 is transmitted to the transmission network through the transmission unit 509. [ Here, the transmission unit 509 broadcasts the loss-compression-coded data by the encoder 507 in the form of electromagnetic waves.

The broadcasted electromagnetic wave is transmitted to the TV receiver 511 through the transmission network. Here, the transmission network may be configured to include, for example, an Internet network and / or a base station.

The TV receiver 511 receives an electromagnetic wave through a transmission network, converts the received electromagnetic wave into a viewable form (video and audio), and outputs it.

6 is a view for explaining a mixer according to another embodiment of the present invention.

The mixer 130 illustrated in FIG. 6 may be used in place of the mixer 30 in the broadcast system illustrated in FIG. 1 or the mixer 501 of the broadcast system illustrated in FIG. 5 illustratively.

The mixer 130 outputs the acoustic signal output from the DAC 20 to the speaker 50 before outputting the acoustic signal output from the DAC 20 to the speaker 50, And converts the generated metadata into a sound wave signal in the non-audible frequency band, and converts the converted metadata into a sound wave signal in the non-audible frequency band, A mixing signal mixed with a signal can be generated.

The mixer 130 further determines whether or not the acoustic signal received from the DAC 20 includes non-audible band sound wave data, and if so, the new non-audible band sound wave data, (Hereinafter referred to as "bypass") whether to change the sound wave data to blue band sound wave data (here, the change can be either full replacement, partial replacement, addition or partial deletion) .

As a result of the determination, the mixer 130 outputs the acoustic signal received from the DAC 20 as it is. For example, when the existing non-audible band sound wave data is a URL or an ID meaning a URL, the mixer 130 can directly output the sound signal received from the DAC 20.

On the other hand, if the mixer 130 determines that the existing non-audible band sound wave data is to be changed, the mixer 130 can generate new non-audible band sound wave data and change the existing non-audible band sound wave data using the new non-audible band sound wave data. Here, the new non-audible band sound wave data may further include position estimation information by the position estimation unit 35, for example. There are various ways to change the existing non-audible spectrum sound wave data with the new non-audible spectrum sound wave data, and those skilled in the art can easily implement the present invention.

The mixer 130 that implements the functions described above may have the configuration shown in FIG. 6, for example. However, it should be understood by those skilled in the art that the mixer 130 according to the present invention is not limited to the configuration shown in FIG.

 The mixer 130 of FIG. 6 may further include a filter F, a second coupling portion C, and a switch S, as compared with the mixer 30 of FIG.

Hereinafter, the mixer 130 will be mainly described with respect to a portion that is different from the mixer 30. [

The filter F receives an electrical signal output from the DAC 20, and the filter F removes the non-audible band sound wave data in the frequency band.

The non-audible band sound wave data output from the DAC 38 is output to the combining unit 36 (referred to as' first combining unit ') and the second combining unit C'.

The switch S switches the output of the first coupling section 36 to the output terminal 32 or the output of the second coupling section C to the output terminal 32 under the control of a controller (not shown) And switches to the output terminal 32.

The controller (not shown) or the sound recognition engine 33 determines whether to change the existing non-audible band sound wave data if the acoustic signal output from the DAC 38 already contains non-audible band sound wave data It is possible to control the switch S so that the output of the second coupling portion C is outputted to the output terminal 32. In this case,

On the other hand, when it is desired to output the existing non-audible band sound wave data as it is, the switch S can be controlled so that the output of the first coupling portion 36 is outputted to the output terminal 32.

Hereinafter, the operation of the mixer 130 will be described in more detail assuming three cases.

i) When the acoustic signal output from the DAC 38 does not include non-audible band sound wave data

The acoustic recognition engine 33 generates metadata from the acoustic signals output from the DAC 38, and the acoustic wave generating engine 34 converts the metadata into acoustic wave signals of the non-audible range.

The DAC 38 converts the sound wave signal of the non-audible range converted by the sound wave generating engine 34 into an analog signal, and then outputs the analog signal to the first combining unit and the second combining unit.

The switch S is switched so that either the first coupling portion or the second coupling portion is output to the output terminal 32. [

For a more detailed description of the acoustic recognition engine 33 and sound generation engine 34, please refer to the embodiment described with reference to FIG.

ii) When the acoustic signal output from the DAC 38 includes non-audible band sound wave data and passes the same

The sound recognition engine 33 does not generate the metadata when the acoustic signal output from the DAC 38 contains the non-audible band sound wave data predetermined to be subjected to the specific non-audible band sound wave data-passing. Therefore, there is no non-audible band sound wave data generated by the sound wave generating engine 34, and the switch S is switched so that the output of the first coupling portion is output to the output terminal 32. [

iii) When the acoustic signal output from the DAC 38 includes non-audible band sound wave data and changes it

When it is determined that the non-audible band sound wave data included in the acoustic signal output from the DAC 38 needs to be changed, the sound recognition engine 33 refers to the sound wave data of the corresponding non-audible band to generate new metadata . Accordingly, the sound wave generating engine 34 converts the new metadata into the non-audible band sound wave data and outputs it to the DAC 38. The output of the DAC 38 is input to the first combining unit 36 and the second combining unit C . On the other hand, the switch S is switched such that the output of the second coupling portion C is output to the output terminal 32. [

The filter F removes the non-audible band sound wave data included in the acoustic signal output from the DAC 38 and outputs it to the second combining unit C. In the second combining unit C, the acoustic signal in the state in which the existing non-audible band sound wave data is removed is combined with the new non-audible band sound wave data in the converted metadata.

For a more detailed description of the other components not described in the mixer 130, please refer to the embodiment described with reference to FIG.

Assuming that this mixer 130 is used in place of the mixer 503 of the broadcasting system of FIG. 5, the mixer 130 performs at least three operations as described above for the uncompressed image + sound signal can do. Please refer to the explanation above for a detailed explanation.

7 is a diagram for explaining a broadcasting method according to another embodiment of the present invention.

Referring to FIG. 7, the method includes mixing metadata into a sound signal before the sound signal is output to the outside. Each of the steps to be described below can be performed by the mixer described with reference to Figs. 1, 5, and 6, for example.

The broadcasting method illustrated by way of example with reference to FIG. 7 differs from FIG. 3 in that it further includes steps S204, S206, S208, and S210.

In step S204, it is determined whether there is metadata in the acoustic recognized in step S203 as a sound wave in the non-audible range. If the judgment result is negative, the operation of S205 and subsequent steps is carried out, which is referred to in Fig.

As a result of the determination in step S204, if there is metadata in the non-audible range, the existing metadata is retained and it is determined whether to pass or change the metadata in step S206.

If it is determined to be a pass in step S206, step S210 is performed, and then step S215 is performed.

If it is determined in step S206 that the existing metadata is to be changed, new metadata is generated (S208) and converted into sound waves in the non-audible band (S207). Thereafter, in step S209, an operation for mixing a new meta data with an SS is performed instead of the existing metadata. Please refer to Fig. 3 for the subsequent operation.

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, And variations are possible.

The scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

10: storage unit 20: DAC
30: Mixer 40: Amplifier
50: speaker 100: announcement system
200: Mobile device

Claims (22)

A broadcasting method for outputting sound through speakers installed in a noise region,
Generating metadata from the sound signal, which is associated with sound output through the speaker, before outputting the sound signal through at least one of the speakers installed in the noise region;
Converting the metadata into a sound wave signal of a non-audible range;
Mixing the audio signal converted into the sound signal of the non-audible range with the sound signal to generate a mixing signal,
Wherein the mixing signal is output through the speaker. The method according to claim 1,
Determining whether the acoustic signal includes acoustic wave data in a non-audible range before the step of generating the metadata,
Wherein the step of generating the metadata includes the step of generating the metadata when the acoustic signal does not include the acoustic wave data in the non-audible range - the sound wave data in the existing non-audible range. 3. The method of claim 2,
And determining whether to maintain or change existing non-audible sound data when the sound signal includes sound wave data of an existing non-audible range. The method of claim 3,
And deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,
Wherein the step of generating the mixing signal is a step of mixing the sound wave data of the non-audible spectrum converted in the step of converting the sound signal into the sound signal of which the sound wave data of the existing non- Way. The method according to claim 1,
What is associated with the sound output through the speaker,
i) converting at least a portion of the sound output through the speaker into text;
ii) converting information associated with at least a portion of the sound output through the speaker into text;
iii) converting to an Internet address that includes information associated with at least a portion of the sound through the speaker; And
iv) an ID representing any one of i) to iii) above;
And a broadcast program. The method according to claim 1,
And receiving an acoustic signal before being output to the speaker,
The metadata is generated from the acoustic signal received by the input, and
Wherein the acoustic signal input by the input terminal is provided to generate the mixing signal through a bypass path,
Wherein the bypass path is a path that bypasses the step of generating the metadata and the step of converting the metadata into an audio signal of an invisible band. 7. The method according to any one of claims 1 to 6,
Further comprising the step of continuously outputting the metadata converted into the sound wave signal of the non-audible frequency band through the speaker at a predetermined time interval after the mixing signal is outputted through the speaker Way. A mixer for use in an acoustic system for outputting sound to the outside,
A sound recognition engine for recognizing sound from the sound signal and outputting the meta data, which is related to the sound outputted to the outside, before outputting the sound signal to the outside;
A sound wave generating engine for converting the metadata into a sound wave signal in an audible range;
And a combiner for generating a mixing signal by mixing the sound signal of the non-audible range with the sound signal. 9. The method of claim 8,
The sound recognition engine determines whether or not the sound signal includes sound wave data in a non-audible range, and the sound signal includes sound wave data in a non-audible range - 'sound wave data in a conventional non-audible range' The metadata generating unit generates the metadata. 10. The method of claim 9,
Wherein the sound recognition engine determines whether to maintain or change existing non-audible sound data when the sound signal includes sound wave data of an existing non-audible range. 11. The method of claim 10,
And a filter for deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,
Wherein the combining unit mixes the sound wave data of the non-audible range converted by the sound wave generating engine with the sound signal of which the sound wave data of the existing non-audible range is deleted by the filter. 9. The method of claim 8,
Associated with the sound being output to the outside,
i) converting at least a part of the sound outputted to the outside into text;
ii) converting information associated with at least a portion of the sound output to the outside into text;
iii) converting to an Internet address that includes information associated with at least a portion of the sound output to the outside; And
iv) an ID representing any one of i) to iii) above;
And the mixer. 13. The method according to any one of claims 8 to 12,
Wherein the sound wave generating engine outputs the metadata converted into the sound wave signal of the non-audible frequency band to the combining unit at predetermined time intervals after the mixing signal is output to the outside,
Wherein the combining unit outputs the metadata received at the predetermined time interval to the speaker. 14. The method of claim 13,
An input terminal capable of receiving an acoustic signal before being output to the outside;
An output terminal receiving the mixing signal generated by the coupling unit and outputting the mixed signal to the outside; And
And a bypass path for providing a path through which the acoustic signal received through the input terminal can move to the coupling unit. 15. The method of claim 14,
Wherein when the mixing signal generated by the sound wave generating engine is not input from the sound wave generating engine, the combining unit receives the sound signal through the bypass path, And outputs the acoustic signal as it is. 14. The method of claim 13,
When the combining unit receives the sound signal (referred to as 'first sound signal') at time T1 and receives the sound signal (referred to as 'second sound signal') at time T2 after a predetermined time elapses,
The coupling portion
Mixes the first sound signal and the metadata generated from the first sound signal by the sound wave generating engine to generate a mixing signal (referred to as a 'first mixing signal') to output to the output stage, and
Mixes the second sound signal and the metadata generated from the second sound signal by the sound wave generating engine to generate a mixing signal (referred to as a 'second mixing signal') and outputs the mixed signal to the output terminal,
The coupling portion
And outputs the first mixed signal to the output terminal at a predetermined time interval during a time before the acoustic signal of the non-audible range generated from the second acoustic signal is received Lt; / RTI > 14. The method of claim 13,
and a position estimation module for estimating a position at which the sound signal is received by using at least one of i) at least one of GPS, mobile communication network, and WiFi, ii) an inertia sensor, and sound recognized in the sound signal,
Wherein the meta data includes a position estimated by the position estimation module. A broadcasting method for outputting sound,
Generating metadata from the sound signal, which is associated with sound output to the outside, before outputting the sound signal to the outside;
Converting the metadata into a sound wave signal;
Mixing the audio signal converted into the sound wave signal of the non-audible range with the sound signal to generate a mixing signal; And
And compressing the mixing signal. 19. The method of claim 18,
Determining whether the acoustic signal includes acoustic wave data in a non-audible range before the step of generating the metadata,
Wherein the step of generating the metadata includes the step of generating the metadata when the acoustic signal does not include the acoustic wave data in the non-audible range - the sound wave data in the existing non-audible range. 20. The method of claim 19,
And determining whether to maintain or change existing non-audible sound data when the sound signal includes sound wave data of an existing non-audible range. 19. The method of claim 18,
And deleting the sound wave data of the existing non-audible range when it is determined to change the sound wave data of the existing non-audible range,
Wherein the step of generating the mixing signal is a step of mixing the sound wave data of the non-audible spectrum converted in the step of converting the sound signal into the sound signal of which the sound wave data of the existing non- Way. 22. The method according to any one of claims 18 to 21,
Further comprising the step of continuously outputting the metadata, which is converted into the sound wave signal of the non-audible frequency band after the mixing signal is outputted through the outside, through the outside at predetermined time intervals Way.

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