KR20170123586A - Sound wave processing method and system for generating broadcasting program including non-audible sound wave, and method and system for providing contents on demand using the sound wave processing system - Google Patents

Abstract

According to an embodiment of the present invention, a sound wave signal processing system and method are provided to provide information to a viewer without loss by preventing non-audible spectrum sound waves from overlapping when there are various subjects capable of injecting non-audible spectrum sound waves into a broadcast program. Also, according to an embodiment of the present invention, a method and system for providing contents on demand are provided to output contents that a user wants to a TV by an operation of selecting and searching for the contents on a terminal by executing a content application related to a broadcast program currently being watched by the viewer. The method includes a step of receiving a broadcast program; a first determination step; a step of generating a sound wave including an ID of a non-audible band; and a step of outputting a sound wave including the ID to a TV.

Description

TECHNICAL FIELD [0001] The present invention relates to a sound wave processing method and a sound wave signal processing system, and a method and system for providing on-demand content using the system. sound wave processing system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for processing an acoustic signal, and a method and system for providing an on-demand content using the system, and more particularly to a method and system for processing a sound signal capable of generating a broadcast program including non- And a method and system for providing on-demand content using the system.

Recently, technology for providing mobile interworking service to viewers by inserting non-audible sound waves containing specific information into television (TV) images is being studied. For example, Korean Patent Application No. 2013-0043862 (filed on April 19, 2013) discloses a method of providing a user-customized advertisement based on an acoustic signal output from a TV.

Conventionally, the process of inserting non-audible sound waves into a broadcast program is mainly performed by a program provider (PP) who manufactures or purchases a broadcast program. However, it is technically possible for a general cable broadcasting operator (SO), an IPTV provider, a satellite broadcasting provider, etc., to receive a broadcasting program from a program supplier (PP) and to supply the viewer with a non-audible band sound wave into the broadcasting program. There is a problem that the non-audible band sound waves injected by the program supplier (PP) and the non-audible band sound waves injected by the general cable broadcasting service provider (SO) overlap with each other and the specific information included in the non-audible band can not be identified .

Meanwhile, in the case of the TV home shopping, an interactive shopping channel (for example, T-commerce) that can purchase goods using a remote control of the TV while watching TV broadcasts is being provided. However, the interactive shopping channel is not activated due to the inconvenience that it is not easy to search for, select and pay for products on the TV screen with the remote control.

According to an embodiment of the present invention, when there are various subjects capable of injecting a non-audible band sound wave into a broadcast program, the non-audible band sound waves are not superimposed, so that a sound wave signal Processing system and method.

According to an embodiment of the present invention, an on-demand content capable of outputting a desired content to a TV by an operation of executing a content application related to a broadcast program that the viewer is currently viewing on the terminal and searching for and selecting the content on the terminal, Providing method and system.

According to an embodiment of the present invention, there is provided a method of processing a sound signal in a set-top box receiving a broadcast program and providing the program to a TV, the method comprising: receiving a broadcast program; A first determination step of determining whether to output a set-top box-related ID when outputting the audio signal of the broadcast program to a TV; Generating a sound wave including an ID of the non-audible range including the set-top box-related ID when it is determined to output the set-top box-related identification information (ID); And outputting the generated ID-included sound wave to a TV together with an audio signal of the broadcast program, wherein the set-top box-related ID includes: (i) a set-top box ID for identifying a set-top box; And (ii) an application ID for identifying a channel-linked application executed in the set-top box and a broadcast program ID for identifying the broadcast program.

According to an embodiment of the present invention, there is provided a sound wave signal processing system for processing sound wave signals included in a broadcast program, the system comprising: a sound wave signal processing unit operable in a set-top box or a server communicably connected to the set- A sound wave signal filtering unit configured to filter or extract non-audible band signals; A sound wave signal mixing unit operable in the set-top box and configured to mix sound waves including an ID of the non-audible band including ID information of the set-top box with the audio signal of the broadcast program; And a control unit operable in the set-top box or the server, for determining whether a broadcast program ID for identifying a broadcast program exists in the non-audible bandwidth of the received broadcast program, and for outputting an audio signal of the broadcast program to a TV, And a determination unit configured to determine whether or not to output the ID together.

According to an embodiment of the present invention, there is provided a method of providing on-demand content to a TV viewer in a set-top box receiving a broadcast program and providing the broadcast program to a TV, the method comprising: Generating a sound wave including the ID and outputting it to the TV together with the audio signal of the broadcast program; Receiving a result of selecting a content from a terminal receiving the ID-containing sound wave and extracting the set-top box ID from the terminal; Requesting the selected content to an on-demand content server; And receiving the content from the on-demand type content server and outputting the content through a TV, wherein the set-top box includes an application ID for identifying a channel-linked application executed in the set-top box, ID is transmitted through the TV or is transmitted to a relay server communicably connected to the set-top box.

According to an embodiment of the present invention, there is provided a content providing method for providing on-demand content to a TV viewer through a TV set-top box using a mobile terminal, the method comprising: receiving, by the terminal, Extracting identification information (ID) included in a non-audible band of the digital broadcasting receiver; Switching a screen of a content application for content search based on the extracted ID; And transmitting the selection result to the settop box when a predetermined content is selected by a user input in the content application, the ID including: (i) a set-top box ID identifying the set-top box; (ii) an application ID that identifies the set-top box ID and the channel-linked application running in the set-top box; And (iii) a broadcast program ID for identifying the set-top box ID and the broadcast program; A content providing method, and a content providing method.

According to an embodiment of the present invention, there is provided a computer-readable recording medium on which an audio signal processing application for processing a sound signal output from a TV to provide on-demand content to a TV viewer through a TV set- The sound wave signal processing application is loaded in a memory of a mobile terminal and executes a sound wave signal processing method on the terminal. The sound wave signal processing method includes receiving a sound wave signal output from a TV, Extracting information (ID); And switching the screen of the content application for content retrieval based on the extracted ID, wherein the ID includes: (i) a set-top box ID that identifies the set-top box; (ii) an application ID that identifies the set-top box ID and the channel-linked application running in the set-top box; And (iii) a broadcast program ID for identifying the set-top box ID and the broadcast program; A computer-readable recording medium recording the sound wave signal processing application is provided.

According to an embodiment of the present invention, when there are various subjects capable of injecting non-audible spectrum sound waves into a broadcast program, the non-audible spectrum sound waves are not superimposed to provide an advantage that information to be provided to viewers can be provided without loss to provide.

According to an embodiment of the present invention, a content application related to a broadcast program currently being watched by the viewer can be executed in the terminal, and a content desired by the viewer can be output to the TV by an operation of searching for and selecting the content on the terminal , It is possible to enjoy the convenience of home shopping by eliminating the inconvenience of searching contents only by the TV remote controller in the conventional TV home shopping system.

1 is a block diagram for explaining an acoustic signal processing system according to an embodiment of the present invention;
2 is a diagram for explaining an execution operation of a channel-linked application in one embodiment,
FIG. 3 is a block diagram for explaining a function of the sound wave signal processing unit according to an embodiment;
4 is a block diagram illustrating some components of a set-top box according to an exemplary embodiment.
5 is a flowchart for explaining an operation of processing an acoustic signal according to an embodiment.
FIG. 6 is a flowchart for explaining an operation according to the first embodiment that can replace step S200 of FIG. 5; FIG.
FIG. 7 is a flowchart for explaining an operation according to the second embodiment that can replace step S200 of FIG. 5; FIG.
FIG. 8 is a flowchart for explaining an operation according to the third embodiment, which can replace step S200 of FIG. 5;
9 is a flowchart for explaining the sound wave signal processing operation according to the alternative embodiment;
FIG. 10 is a block diagram for explaining an on-demand type content providing system to which an audio signal processing system according to an embodiment is applied;
11 is a block diagram illustrating some components of a terminal according to an exemplary embodiment;
FIG. 12 is a flowchart illustrating an on-demand type content providing method to which the sound signal processing system according to the embodiment of FIG. 10 is applied;
13 is a block diagram for explaining a sound signal processing system according to another embodiment of the present invention;
FIG. 14 is a flowchart for explaining a method of processing an acoustic signal according to the embodiment of FIG. 13;
15 is a block diagram for explaining an on-demand type content providing system to which an audio signal processing system according to an alternative embodiment is applied;
16 is a flowchart illustrating an on-demand type content providing method to which the sound signal processing system according to the embodiment of FIG. 15 is applied.

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 means that it can be formed directly on the other element, or a third element may be placed therebetween.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present 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.

Also, terms such as " ... part ", "module "," ... board ", "... block ", etc. used to refer to components of the invention are used herein to describe at least one function or operation Unit, which may be implemented in hardware, software, or a combination of hardware and software.

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 well known in the description of the invention and not significantly related to the invention do not describe confusion in describing the present invention.

1 is a block diagram for explaining an acoustic signal processing system according to an embodiment of the present invention.

Referring to the drawings, an acoustic signal processing system 100 according to an exemplary embodiment may include a set-top box 10 and a sound processing server 20, and may include a program provider (PP) 50, (60), a television (TV) 30, and the like.

The program provider 50 is a company that manufactures or purchases a broadcasting program. In the present invention, the broadcasting provider such as KBS, MBC, a cable channel provider such as Mnet, CJ home shopping, YTN, and OCN . The program provider 50 sends out a broadcast program via the platform server 60. [

In the present invention, the platform maker 60 is a provider that provides a cable TV viewer with a broadcast program produced or purchased by the program provider 50, for example, a system operator (SO) such as various cable TV stations, ), An IPTV provider, a satellite broadcasting provider, and the like. Although not shown, the platform server 60 may transmit a broadcast program to a cable TV viewer through a network operator (NO).

An analog broadcasting system or a digital broadcasting system may be used to provide a broadcasting program to the set-top box 10 at the platform maker 60 and may be implemented in various ways. For example, the platform server 60 can be broadcasted using any one of a terrestrial broadcast using a transmission tower, a satellite broadcast using a satellite, a cable broadcast using a wire, or an Internet broadcast using the Internet. Unicasting, or multicasting to the set-top box 10. When the platform server 60 uses the digital broadcasting system, the broadcast program can be transmitted to the set-top box 10 by a streaming method or a download method.

As used herein, the term "broadcast program" may be, for example, a video file of a TV program produced or purchased for broadcasting by the program provider 10, May be a bundle of. In one embodiment, the broadcast program includes a video track and an audio track, and may be a video file created in any of video file formats such as MPEG, MPEG2, MPEG2-TS, MXF, GXF, MOV, WMV, MP4, When the broadcast program is transmitted to the set-top box 30 in a manner that the name of the transmission unit of the streaming data is called "packet", "segment", "frame", "file" May be crying).

The program provider 50 may include in the broadcast program identification information ("broadcast program ID") that identifies the broadcast program with another broadcast program. The broadcast program ID is unique identification information that distinguishes the broadcast program from other broadcast programs. In an embodiment of the present invention, it is assumed that the broadcast program ID can be transmitted in the non-audible band of the audio signal of the broadcast program.

"Non-audible spectrum" means a frequency band that is not audible to human hearing, and may include frequencies in the 18-24 KHz band, for example. In one embodiment, a non-audible sound generator (not shown) generates a sound wave in the non-audible range and specific information, such as a broadcast program ID, is injected into the non-audible sound wave. The generation of the non-audible sound wave including the specific information can be performed by a variety of methods such as amplitude modulation (ASK), frequency modulation (FSK), time varying modulation (Chirp modulation) Modulated by one of the modulation schemes and placed on the non-audible sound waves, thereby generating non-audible sound waves.

As used herein, the term "sound waves" refers to those in which the vibrations of an object are propagated through the medium (air) so that a person can hear them audibly. Unless there is a particular need for distinction, Or "sound ".

It is possible to embed non-audible sound waves in which specific information is planted in a broadcasting program, for example, in Korean Patent Application No. 10-1448823 (method of transmitting and receiving sound waves using time-varying frequency-based symbols and apparatus ) Or Korean Patent Application No. 2014-0169557 (a method for generating a broadcast image file or a streaming packet including non-audible sound waves and a television broadcast system using the method).

The set top box 10 is connected to the TV 30 and receives the broadcast program transmitted through the platform 60 and separates the video signal and the audio signal included in the broadcast program and appropriately converts and processes the broadcast signal, And outputs it through a speaker and a screen. At this time, the signal in the non-audible range including the broadcast program ID can be processed together with the audio signal in the audible band and outputted through the TV 30. [

In the illustrated embodiment, the set-top box 10 includes a sound signal processing unit 15 for processing the non-audible signal included in the broadcast program. For example, the sound wave signal processing unit 15 has a function of extracting a non-audible band signal from a broadcast program, a function of recognizing specific information (e.g., a broadcast program ID) in the extracted non-audible band signal, and / As shown in FIG.

In one embodiment, the sound signal processor 15 may determine whether a broadcast program ID exists in the non-audible range of the broadcast program. The sound wave signal processing unit 15 may make such a determination by directly analyzing the non-audible band signal, or may determine based on the information received from the external apparatus. For example, in the case of the embodiment shown in FIG. 1, the sound signal processing system 100 includes a sound processing server 20 connected to the set-top box 10 in a communicable manner. In this embodiment, the sound signal processing unit 15 extracts the non-audible band signal of the broadcasting program and transmits it to the server 20, receives information on whether the broadcasting program ID exists in the non-audible band from the server 20, and based on the received information It is possible to know whether the broadcast program ID exists in the non-audible band.

In one embodiment, the sound signal processing unit 15 may insert at least one of the set-top box ID, the broadcast program ID, and the application ID into the non-audible band. Here, the "set-top box ID" is identification information that is uniquely assigned to each set-top box 10 and distinguishable from other set-top boxes. For example, the set-top box ID is an IP address and / .

The "application ID" is identification information of a channel-linked application executed in association with a specific broadcast channel in the set- At this time, the "channel interlocking application" is a kind of software executed in the set-top box 10, and is software executed when a viewer watches a broadcast program of a specific channel in conjunction with the specific channel. For example, FIG. 2 shows an example of a channel interworking application. FIG. 2 shows a broadcast program of a specific home shopping channel. At this time, the broadcast program is broadcast on the screen of the TV 30, and a channel linked application linked to the home shopping channel is executed, And an area 35 indicated by a dotted rectangle). In this embodiment, the channel interworking application may further provide the viewer with merchandise related to the broadcast program currently being broadcast, other goods associated therewith and other information.

In this way, at least some program provider 50 and / or platform server 60 may create such a channel-linked application and pre-install it in set-top box 10, or may download It can be installed and installed. When the viewer views the broadcast through the channel, the channel linked application is executed in the set-top box 10 and displayed on the screen as shown in FIG. 2. In an embodiment, the sound-signal processing unit 15 of the set- For example, the set-top box ID and the application ID of the channel-linked application can be inserted into the non-audible range of the broadcast program.

Referring again to FIG. 1, the terminal 40 may be a mobile communication device possessed by a viewer who watches TV, for example, a mobile communication device such as a cellular phone, a smart phone, a tablet PC, a notebook, or the like. The terminal 40 recognizes the sound signal output from the TV 30 and if specific information (e.g., a broadcast program ID, a set-top box ID, or an application ID) is contained in the non-audible spectrum of the recognized sound signal, Information can be extracted.

In one embodiment, the extracted specific information may be used to provide the viewer with on-demand content, customized information, advertisements, and the like. For example, when the terminal 40 extracts the broadcast program ID, the terminal 40 transmits to the advertisement providing server (not shown) information on what broadcast program the viewer is currently viewing, and the advertisement providing server stores the customized advertisement or information Through the browser of the terminal 40.

As another example, when the terminal 40 extracts the set-top box ID, the set-top box ID informs the position of the viewer, so that an advertisement considering the position of the viewer can be selected. For example, an advertisement providing server (not shown) may select and provide a user-customized advertisement depending on where the set-top box 10 is installed in a public place, a home, or a company.

Now, the sound signal processing unit 15 will be described with reference to FIG.

3 is a block diagram for explaining a function of the sound wave signal processing unit according to an embodiment. 3, the sound wave signal processing unit 15 may include a sound wave signal filtering unit 151, an sound wave signal generating unit 152, and a determination unit 153.

The sound wave signal filtering unit 151 filters the audio signal of the broadcast program received by the set-top box 10 to extract or remove the non-audible frequency band signal. The sound signal filtering unit 151 may be implemented by, for example, a high pass filter or a band pass filter, and may remove the signal of the non-audible range from the audio signal or extract the signal of the non-audible range.

The sound wave signal generation unit 152 is a functional unit that generates a sound wave including the ID of the non-audible range including the set-top box related identification information (ID). Hereinafter, the "set-top box related ID" includes (i) a set-top box ID for identifying a set-top box; (ii) an application ID for identifying a set-top box ID and a channel-linked application running in the set-top box; (iii) a broadcast program ID for identifying a set-top box ID and a broadcast program; (iv) set-top box ID, application ID, and broadcast program ID; Quot; is used as a term to refer to at least one of "

The sound wave signal generating unit 152 generates a sound wave signal of a non-audible range including an ID related to the set-top box (hereinafter, also referred to as an "ID sound wave") to be output simultaneously with the audio signal of the broadcast program.

At this time, the sound signal generation and output operation can be continuously (continuously) performed while the set-top box outputs the broadcast program to the TV, or alternatively, it can be performed when a predetermined time period or predetermined specific event occurs have. For example, while a particular broadcast program is being broadcast on the TV, the non-audible band sound wave of a predetermined length including the set-top box ID or the application ID may be output together with the audio signal of the broadcast program at predetermined intervals.

According to an embodiment of the present invention, a technique of inserting a non-audible sound wave into a broadcast program is disclosed in Korean Patent Application No. 2014-0169557 (a method of generating a broadcast image file or a streaming packet including a non- And a television broadcasting system using the broadcasting system).

In addition, a technique for inserting arbitrary information into non-audible sound waves or extracting specific information embedded in a sound signal is disclosed in Korean Patent Application No. 2012-0038120 (location estimation method and position estimation method for estimating a position of a mobile terminal using an acoustic system System and its acoustic system), Korean Patent Application No. 2012-0078410 (proximity data collection method and system), Korean Patent Application No. 2012-0053286 (system for identifying speakers and position estimation system using the same), Korea A technique disclosed in Patent Application No. 2013-0107604 (a method of transmitting and receiving an acoustic wave using a time-varying frequency-based symbol and a device using the same), Korean Patent Application No. 2015-0118809 have. All of the techniques disclosed in the above-mentioned patent application specification are to be incorporated herein by reference and should be treated as part of this specification.

The determination unit 153 determines whether the broadcast program ID exists in the non-audible bandwidth of the broadcast program received by the set-top box 10, and whether the set-top box related ID is output to the TV together with the audio signal of the broadcast program Lt; / RTI >

In order to determine whether or not the broadcast program ID exists in the non-audible frequency band, the determination unit 153 receives the sound wave signal of the non-audible frequency band extracted by the sound wave signal filtering unit 151 and determines whether the sound wave signal has the broadcast program ID It can be judged. In an alternative embodiment, a determination of whether a broadcast program ID is present in the non-audible range may be performed at a device external to the set-top box 10, e.g., a sound processing server 20. [ In this case, the set-top box 10 transmits the non-audible spectrum sound wave of the broadcast program extracted by the sound signal filtering unit 151 to the server 20, and the server 20 determines that the broadcast program ID exists in the non- And transmits the determination result to the set-top box 10.

The determination unit 153 may determine whether to output the set-top box-related ID along with the audio signal of the broadcast program through the TV, based on the broadcast program or a broadcast channel for transmitting the broadcast program to the set-top box 10 . For example, the determination unit 153 may determine, based on the broadcast program currently being broadcasted through the set-top box or information on the broadcast channel at that time (i.e., information on what broadcast the current viewer is viewing on which broadcast channel) This judgment can be performed.

Also, in one embodiment, this determination operation may be performed when a predetermined period or a specific event occurs. For example, when a viewer changes a broadcast channel by operating a set-top box, it can determine whether to insert a set-top box ID or an application ID into a broadcast program whenever a broadcast channel is changed.

In one embodiment, when the determination unit 153 determines whether to output the set-top box ID along with the audio signal of the broadcast program through the TV, the determination unit 153 determines whether or not the user opts-out the sound output function .

The sound wave signal processing section 15 described above can be implemented in hardware and / or software according to a specific embodiment. For example, the sound wave signal filtering unit 151 may include hardware such as a high pass filter and a band pass filter, and at least a part of the sound wave signal generating unit 152 and the determination unit 153 may be implemented by software.

Some functions of the sound signal processing unit 15 may be executed in a device outside the set-top box. For example, at least one of the sound signal filtering unit 151 and the determination unit 153 may be executed in a server (e.g., a sound processing server 20) communicably connected to a set-top box, And to receive the result of the determination performed in the server 20. [

4 is a block diagram for explaining some components of the set-top box 10 according to one embodiment. Referring to FIG. 4, the set-top box 10 may include a processor 110, a memory 120, and a storage device 130. The set-top box 10 may include hardware / software configurations such as tuners, modulators / demodulators, video and audio decoders, interface terminals, etc., for receiving broadcast programs from the platform 60 and for processing video and audio signals However, in FIG. 4, all of these configurations are omitted and only the components for illustrating the channel interlocking application 11 and the sound signal processing software 155 are shown for convenience of explanation.

The storage device 130 is a storage means for storing a broadcast program, and may be embodied as a magnetic recording medium such as a hard disk drive (HDD) or a semiconductor memory such as a flash memory. The storage device 130 may store the channel-linked application 11 and / or the sound signal processing software 155. Various software such as the channel interlocking application 11 and the sound signal processing software 155 may be stored in the storage device 130 and loaded into the memory 120 under the control of the processor 110 and executed.

As described above with reference to FIGS. 1 and 2, the channel interworking application 11 interworks with the broadcast channel when a broadcast program is broadcasted through a broadcast channel of a program supplier 50 such as a home shopping, It is a program to be executed.

The sound wave signal processing software 155 refers to a part of the sound wave signal processing unit 15 described with reference to FIG. 3, which is implemented by software. The sound wave signal processing software 155 includes at least a part of the sound wave signal filtering unit 151, Or at least a part of the determination unit 153 may be implemented in software. Although the channel interlocking application 11 and the sound signal processing software 155 are shown as one block in the figure, they may be implemented by one or more software according to a specific embodiment.

Also, in one embodiment, the channel interlocking application 11 may include the function of processing (e.g., generating, filtering, outputting, etc.) sound waves. For example, at least a portion of the sound signal processing software 155 may be included in the channel interworking application 11.

5 is a flow diagram illustrating an exemplary operation for processing sonic signals in the set-top box 10, according to one embodiment.

Referring to the drawing, in step S110, the set-top box 10 receives a broadcast program from the platform writer 60. [ Then, in step S120, it is determined whether to output the set-top box-related ID when outputting the audio signal of the broadcast program to the TV.

In one embodiment, the determining step S120 may be performed based on a broadcast channel for transmitting a broadcast program or a broadcast program to the set-top box. In addition, in one embodiment, the determination step S120 may be performed whenever the broadcast channel is changed, and may be set to be performed whenever a predetermined time period or a specific event occurs.

If it is determined in step S120 that the ID related to the set-top box is not to be output, the flow advances to step S180 to transmit the broadcast signal received from the platform server 60, without removing the existing non- The program can be directly output to the TV 30.

In addition, in one embodiment, the determining step S120 may further consider whether the user opts-out the sound wave output function of the set-top box 10. For example, if the user does not listen to the audio signal of the broadcast program by operating the set-top box 10 or does not listen to the sound of the non-audible band, the decision step S120 decides not to output the set- (S180).

If it is determined in step S120 that the set-top box ID is to be output to the broadcast program, the set-top box 10 extracts the non-audible band signal from the broadcast program (S130) (Step S140).

If the set-top box ID is present in the non-audible range of the broadcast program, the set-top box 10 removes the non-audible band signal of the broadcast program (S150). In one embodiment, this step S150 may be performed, for example, by passing the audio signal of the broadcast program through a high-pass filter or a band-pass filter.

After removing the non-audible band signal, a non-audible band sound wave (i.e., "ID sound wave") containing the set-top box related ID is generated in step S160. In one embodiment, this step S160 can be continued (continuously) while the broadcast program is being broadcast on the TV, or alternatively, it can be executed at predetermined intervals or when a preset event occurs. Then, in step S170, the sound wave including the ID is output to the TV together with the audio signal of the broadcast program.

If it is determined in step S140 that the broadcast program ID does not exist in the non-audio band, the process may proceed to step S160 without removing the existing non-audio band signal.

Although it has been described in the flowchart of FIG. 5 that the two determination steps S120 and S140 are performed in the set-top box 10, at least one of the determination steps S120 and S140 in the alternative embodiment is performed in the set- (E.g., a sound processing server 20) communicably connected to the set-top box, and the set-top box can be configured to receive a result of the determination performed in the server.

In this regard, FIG. 6 is a flow chart illustrating an exemplary operation according to the first embodiment that may replace step S200 of FIG.

Referring to FIG. 6, after the set-top box 10 receives the broadcast program, it is determined whether to output the set-top box ID (S211). If it is determined to output the set-top box ID, the broadcast program extracts the non- S212). These steps S211 and S212 are the same as the steps S120 and S130 in Fig.

Then, the set-top box 10 transmits the extracted non-audible band signal to the external device, for example, the sound processing server 20 in FIG. 1 (S213) to inquire whether or not the broadcast program ID is included in the non-audible range. In this case, in step S213, the set-top box 10 receives a broadcast program currently broadcast through the set- Information about the channel can be transmitted to the server 20 together.

The server 20 includes a determination function for determining whether or not specific information is included in the non-audible band signal, and also includes a broadcast program ID list. Accordingly, the server 20 can determine whether the broadcast program ID exists in the non-audible band signal received from the set-top box 10 (S214).

Then, the server 20 transmits a result of the determination as to whether the broadcast program ID exists in the non-audible bandwidth to the set-top box 10 (S215), and the set- (Steps S150 to S170) of the first embodiment.

Step S211 of determining whether to insert a set-top box-related ID into the non-audible spectrum may be performed separately from steps S212 to S214 of determining whether a broadcast program ID is included in the non-audible spectrum. Thus, for example, step S211 may be executed at any time position between steps S212 and S215, and may be executed after step S215.

7 is a flowchart for explaining an operation according to the second embodiment that can replace step S200 of FIG.

Referring to FIG. 7, after the set-top box 10 receives the broadcast program, it determines whether to output the set-top box ID together with the audio signal of the broadcast program to the TV (S211) To the sound processing server 20 (S222), a request signal requesting determination of whether or not the broadcast program ID exists in the blue band. At this time, in step S222, the set-top box 10 can transmit information on a broadcast program or a broadcast channel currently being broadcasted through the set-top box to the server 20. [

Assuming that the server 20 itself includes the function of a set-top box or is communicably connected to a set-top box, the server 20 can access the set-top box 10 independently of the set-top box 10 as shown in step S223 A broadcast program can be received. Upon receiving the request signal from the set-top box 10 in step S222, the server 20 receives the same broadcast program as that received by the set-top box 10 and extracts the non-audible band signal from the broadcast program (S224), and determines whether or not the extracted non-audible band signal includes a broadcast program ID (S225). Thereafter, the server 20 transmits the determination result to the set-top box 10 (S226). Thus, the set-top box 10 can know whether or not the broadcast program ID exists in the invisible bandwidth.

8 is a flowchart for explaining an operation according to the third embodiment which can replace step S200 of FIG.

Referring to FIG. 8, after the set-top box 10 receives a broadcast program, a request signal for requesting to determine whether to output a set-top box ID and whether a broadcast program ID exists in the non- To the processing server 20 (S231). At this time, in step S231, the set-top box 10 transmits a broadcast program currently broadcast through the set- Information about the channel can be transmitted to the server 20 together.

It is assumed that the server 20 includes the function of a set-top box or is communicably connected to a set-top box. Thus, as shown in step S232, the server 20 can access the set- When receiving the request signal from the set-top box 10 in step S231, the server 20 receives the same broadcast program as the set-top box 10 receives. The server 20 determines whether to output the set-top box-related ID together with the audio signal of the broadcast program to the TV (S233). If it is determined to output the set-top box ID, the server 20 extracts the non-audible band signal (S234).

The server 20 then determines whether the extracted broadcast signal includes the broadcast program ID in step S235 and transmits the determination result to the set top box 10 in step S236. It is possible to know whether or not the broadcast program ID exists in the non-audible band.

9 is a flow diagram illustrating an exemplary operation for processing sonic signals in set-top box 10 in accordance with an alternative embodiment. 5, the step S310 and the steps S360 to 370 of FIG. 9 correspond to the step S110 and the steps S150 to S170 of FIG. 5, respectively, and the extraction and determination of the non- (S400) is different from the procedure of step S200 of Fig.

Referring to FIG. 9, when the set-top box 10 receives a broadcast program (S310), it extracts the non-audible band signal from the received broadcast program (S320), and determines whether a broadcast program ID exists in the non-audible band (S330). In step S340, when outputting the audio signal of the broadcast program to the TV, it is determined whether to output the set-top box-related ID together with the audio signal of the program. If it is determined that the broadcast program ID exists and the ID related to the set-top box is to be output (S340_Y), the flow advances to step S360 to delete the existing non-audible band signal and insert the set- To the TV (S360 to S380).

If it is determined that the broadcast program ID exists but the set-top box ID is not output (S340_N), the original broadcast program is output to the TV without deleting the existing non-audible band signal or inserting new information (S390).

In one embodiment, even if the broadcast program ID does not exist, the process may proceed to step S360 or may proceed to step S380 according to whether or not to insert the set-top box related ID.

9 correspond to the respective steps of FIG. 5 and are the same or similar to each other, so detailed description of each step is omitted.

Although it has been described in the flowchart of FIG. 9 that step S400 is performed in the set-top box 10, in an alternative embodiment at least some of the steps in this step S400 may be performed by an external device. That is, at least one of the two determination steps S330 and S340 is executed in a server (for example, a sound processing server 20) communicably connected to the set-top box and the set-top box 10 is executed in the server 20 It is to be understood that the flowcharts of Figures 6 to 8 may be applied to the same or similar to step S400 of Figure 9 as well.

FIG. 10 is a block diagram illustrating an on-demand type content providing system to which an audio signal processing system according to an embodiment is applied.

Referring to the drawings, an on-demand content providing system according to an embodiment includes a set-top box 10, a sound processing server 20, a TV 30, a terminal 40, a program provider 50, The relay server 70, and the VOD server 80. [0060]

10, the set-top box 10, the sound processing server 20, the TV 30, the terminal 40, the program provider 50, and the platform publisher 60 have the same or similar configurations and functions as those shown in Fig. The explanation will be omitted, and the configuration or function of difference or addition will be mainly described.

In the illustrated embodiment, the relay server 70 is connected to the set-top box 10 via a wired / wireless communication network such as the Internet and relays data communication between the set-top box 10 and the terminal 40 Lt; / RTI > For example, the set-top box 10 transmits at least a part of the set-top box IDs to be transmitted to the terminal 40 through the sound wave signal to the relay server 70, This partial ID can be received.

In one embodiment, the set-top box ID of the set-top box ID may be inserted into the non-audible wave signal and output to the TV along with the audio signal of the broadcast program to be delivered to the terminal 40, May be transmitted to the terminal 40 via the relay server 70. At this time, the set-top box 10 transmits the application ID and / or the broadcast program ID to the relay server 70 simultaneously or sequentially with the set-top box ID inserted into the non-audible band sound wave and outputted through the TV.

Although the sound processing server 20 and the relay server 70 are separately shown in the illustrated embodiment, the two servers 20 and 70 may be physically identical servers or separate servers in one embodiment.

In the illustrated embodiment, the VOD server 80 is a server that stores various contents and provides contents to each viewer at the request of an individual viewer. Here, "content" means a specific item such as a commodity; Multimedia such as broadcast programs, music, movies, videos, advertisements; Other types / intangible goods / services subject to other transactions. The VOD server 80 may be operated by a program provider 50 such as an airwave or a cable broadcasting station or may be operated by a platform company 60 such as an IPTV, a cable company, or a satellite broadcasting company It can also be operated.

The terminal 40 may be a mobile communication device possessed by a viewer who watches TV, for example, a mobile communication device such as a cellular phone, a smart phone, a tablet PC, a notebook, or the like.

The terminal 40 recognizes the sound signal output from the TV 30 and if specific information (e.g., a broadcast program ID, a set-top box ID, or an application ID) is contained in the non-audible spectrum of the recognized sound signal, Information can be extracted. The technology for extracting specific information embedded in a sound wave signal is disclosed in the above-mentioned patent (for example, Korean Patent Application No. 2012-0038120, No. 2012-0078410, No. 2013-0107604, No. 2015-0118809, etc.) .

11 is a block diagram illustrating some components of the terminal 40 according to an embodiment.

Referring to FIG. 11, the terminal 40 may include a processor 410, a memory 420, and a storage device 430. While terminal 40 has other components such as a display, it will be appreciated that in Figure 11 these other components are all omitted for convenience of description of the present invention. The storage device 430 may be a storage device for storing an operating system and various applications, for example, a magnetic recording medium such as a hard disk drive (HDD) or a semiconductor memory such as a flash memory. In the illustrated embodiment, storage device 430 may store sound wave signal processing application 441 and a plurality of content applications 443.

The terminal 40 includes a plurality of content applications 443, each of which may be executed within the terminal. Each of the plurality of content applications 443 is software that shows content to be sold to a user and supports the user to search for, select, and purchase content on the terminal 40. [ In one embodiment, at least some program providers 50 may provide at least one content application 443 to the terminal 40. For example, a program provider 50 such as CJ Home Shopping, Lotte Home Shopping, and GS Home Shopping among program providers 50 produces a content application 443 for displaying content to be sold in each home shopping and distributes the content to the terminal 40 can do. Various types of software such as a plurality of content applications can be stored in a storage device of the terminal and loaded into a memory under the control of the processor and executed.

Each content application 443 may include a sound wave signal processing module 441. The sound wave signal processing module 441 receives the sound wave signal outputted from the speaker of the TV 30 by the terminal 40, extracts the non-audible sound signal from the sound wave signal, extracts specific information (for example, Is a software module capable of determining and analyzing whether or not an application exists. The technology for extracting specific information embedded in a sound wave signal is disclosed in the above-mentioned patent (for example, Korean Patent Application No. 2012-0038120, No. 2012-0078410, No. 2013-0107604, No. 2015-0118809, etc.) .

The sound wave signal processing module 441 may be embodied independently of each content application 443 and may be implemented in an alternative embodiment such that a plurality of content applications 443 share the function of one sound wave signal processing module .

Various kinds of software such as a plurality of content applications 443 may be stored in the storage device 430 of the terminal and loaded into the memory under the control of the processor 410 and executed.

FIG. 12 is a flowchart illustrating an on-demand type content providing method to which the sound signal processing system according to the embodiment of FIG. 10 is applied.

Referring to FIG. 5, in step S510, the set-top box 10 generates a sound wave of a non-audible range (ID sound wave) including identification information (ID) Lt; / RTI >

In one embodiment, the ID-included sound wave includes a set-top box ID. In an alternative embodiment, the ID-containing sound waves may further include at least one of an application ID and the broadcast program ID. That is, the ID included in the ID-included sound wave includes (i) a set-top box ID that identifies the set-top box; (ii) an application ID that identifies the set-top box ID and the channel-linked application running in the set-top box; And (iii) a broadcast program ID for identifying the set-top box ID and the broadcast program; ≪ / RTI >

Meanwhile, the step S510 of generating and outputting the ID-included sound wave may be performed according to the sound wave processing method described with reference to Figs. 5 to 9. For example, as described with reference to FIG. 5, when the set-top box 10 receives a broadcast program, whether or not the broadcast program ID is included in the non-audible band of the broadcast program and outputting the audio signal of the broadcast program to the TV The ID of the set-top box, and whether or not to output the set-top box ID together with the ID of the set-top box, and deletes the existing non-audible band signal according to the determination result, have.

Referring again to FIG. 12, it is assumed that a specific content application 443 is being executed in the terminal 40 before the set-top box 10 outputs the ID-containing sound wave through the TV (S520). The content application 443 may be displayed and executed on the screen of the terminal 40 or may be executed in the background (i.e., invisible on the screen of the terminal). At this time, the sound wave signal processing module 441 of the content application 443 is preferably executed.

When the set-top box 10 outputs the sound wave including the ID through the TV in step S510, the terminal 40 receives the sound wave signal output from the TV and transmits identification information (ID) included in the non- (S520), and switches the screen of the content application 443 based on the extracted ID (S540). Here, switching the screen of the content application may be performed by, for example, (i) displaying a content application executed in the background on the terminal screen, (ii) updating the screen if it is already displayed on the terminal screen It can mean.

Referring back to the drawing, if the screen of the content application is switched in step S540, then the corresponding content application is executed in step S550. As an example of executing the content application at this time, for example, information on the selected content application can be displayed on the screen of the terminal 40 with a small icon, and the user can click (or touch) the icon to execute the corresponding content application . However, the method of executing the selected content application is not limited to this, and may be variously implemented.

When the content application is executed in the terminal 40, the viewer can search various contents on the content application, and the selected information is transmitted to the settop box 10 when the viewer selects a specific content (S560). In one embodiment, the content selection information may be transmitted to the set-top box 10 via the relay server 70.

The set-top box 10 requests the VOD server 80 for the content selected by the viewer and the VOD server 80 transmits the requested content to the set-top box 10, The content is outputted through the TV 30 (S580).

Therefore, through the above-described method, the viewer can execute the content application related to the broadcast program currently being watched on the terminal 40, and can search for and select the content on the terminal 40, It is possible to enjoy the convenience of home shopping by eliminating the inconvenience of searching contents only by the TV remote controller in the conventional TV home shopping system.

Now, a sound signal processing system according to another embodiment of the present invention will be described with reference to FIG.

In general, the set-top box ID has many bits because it is identification information for identifying the set-top boxes. For example, if an IP address or a MAC address is used as a set-top box ID, 32 bits and 48 bits are required, respectively. If IPv6 is used, 128 bits are required. However, since there is a limit to the amount of data that can be transmitted and converted to a sound signal, it may be difficult to transmit the set-top box ID as a sound signal.

The embodiment shown in Fig. 13 can solve this problem. Referring to the drawings, an acoustic signal processing system according to an embodiment may include a set-top box 10 and an ID management server 90. The set-top box 10, the TV 30, and the terminal 40 are the same as or similar to those of the embodiment shown in FIG.

13, the ID management server 90 has a function of allocating a small number of temporary identification information (ID) to the set-top box 10, so that even if the original set-top box ID has a large number of bits, And transmits the set-top box ID to the terminal 40 through the set-top box ID.

This will be described with reference to FIG. FIG. 14 is a flowchart for explaining a method of processing an acoustic signal according to the embodiment of FIG. ,

Referring to the drawing, in step S610, a set-top box related ID is transmitted to the ID management server 90 together with a temporary ID allocation request. At this time, the set-top box-related ID may include at least one of, for example, a set-top box ID, and an application ID and a broadcast program ID.

In step S620, the ID management server 90 generates and assigns a temporary ID to be assigned to the set-top box 10. [ At this time, the temporary ID has a bit number smaller than that of the original set-top box ID, and preferably has a bit number that can be transmitted through the sound wave signal. When the ID management server 90 generates and assigns a temporary ID, the ID management server 90 matches information of the original set-top box ID, application ID, and broadcast program ID of the corresponding set-top box to the database Or a storage device).

In step S630, the ID management server 90 transmits the temporary ID to the set-top box 10, and the set-top box 10 generates a sound wave in the non-audible range including the temporary ID and outputs the generated sound wave through the TV (S640).

The terminal 40 receives the sound wave signal in the non-audible range through the TV, extracts the temporary ID from the sound wave in step S650, and transmits the extracted temporary ID to the ID management server 90 in step S660. The ID management server 90 that has received the temporary ID from the terminal 40 transmits necessary information out of the information matching the temporary ID (e.g., set-top box ID, application ID, broadcast program ID, etc.) to the terminal 40 (S670).

In this case, in step S670, the ID management server 90 may transmit information such as the set-top box ID to the terminal 40. However, in an embodiment, Only the information such as the application ID or the broadcast program ID may be transmitted to the terminal 40. In this case,

On the other hand, when a set ID is required only while the set-top box 10 is operating and the power of the set-top box 10 is turned off, information about the set-top box stored in the database (or storage device) It is preferable to notify the ID management server 90 of the existence of the set-top box 10 at regular intervals during the operation of the set-top box 10. Therefore, for example, the currently operating set top boxes 10 transmit a predetermined data signal to the ID management server 90 at regular intervals, and the ID management server 90 checks every predetermined period, The set-top box that does not transmit the set-top box can be regarded as powered off and can delete the temporary ID of the set-top box and the stored records matched with the set-top box.

15 is a block diagram illustrating an on-demand type content providing system to which an audio signal processing system according to an alternative embodiment is applied.

Referring to the drawings, an on-demand content providing system according to an embodiment includes a set-top box 10, a sound processing server 20, a TV 30, a terminal 40, a program provider 50, The ID management server 90, and the VOD server 80. [

In FIG. 15, the set-top box 10, the sound processing server 20, the TV 30, the terminal 40, the program provider 50, the platform writer 60 and the VOD server 80 are shown in FIG. 1 or 10 And description thereof is omitted because it has the same or similar configuration and function as those shown in the drawings.

In the embodiment of FIG. 15, the ID management server 90 includes the functions of the ID management server 90 described with reference to FIG. 13 and FIG. That is, the ID management server 90 plays a role of issuing a temporary ID to the set-top box 10 in the sound wave communication between the set-top box 10 and the terminal 40. [ In addition, in one embodiment, the ID management server 90 may further include the functions of the relay server 70 shown in FIG. That is, the set-top box 10 transmits at least a part of the set-top box related IDs to be transmitted to the terminal 40 through the sound wave signal to the ID management server 90, Some IDs can be received.

Although the sound processing server 20 and the ID management server 90 are separately shown in the illustrated embodiment, in one embodiment, the two servers 20 and 90 may be physically the same server or a separate server. Also, in an alternative embodiment, the relay server 70 may exist separately. That is, the sound processing server 20, the relay server 70, and the ID management server 90 may exist independently or at least two servers may be functionally combined according to a specific embodiment.

16 is a flowchart illustrating an on-demand type content providing method to which the sound signal processing system according to the embodiment of FIG. 15 is applied.

Referring to FIG. 7, in step S710, the set-top box 10 generates a sound wave of a non-audible range (ID sound wave) including identification information (ID) Lt; / RTI >

In this case, it is assumed that the ID-included sound wave includes the temporary set-top box ID as described with reference to Figs. 13 and 14 in one embodiment. That is, steps S610 to S630 of FIG. 14 are performed before step S710, and step S710 of FIG. 16 corresponds to step S640 of FIG.

It is assumed that a specific content application 443 is being executed in the terminal 40 before the set-top box 10 outputs the ID-containing sound wave through the TV (S720). The content application 443 may be displayed and executed on the screen of the terminal 40 or may be executed in the background. At this time, the sound wave signal processing module 441 of the content application 443 is preferably executed.

When the set-top box 10 outputs the ID-containing sound wave including the temporary ID through the TV, the terminal 40 (specifically, for example, the sound wave signal processing module 441 of the content application 443 of the terminal) (Step S730), and transmits the extracted temporary ID to the ID management server 90 (step S740). The ID management server 90 that has received the temporary ID from the terminal 40 transmits necessary information out of the information matching the temporary ID (e.g., set-top box ID, application ID, broadcast program ID, etc.) to the terminal 40 (S750).

Thereafter, the terminal 40 switches the screen of the content application 443 based on the information received from the ID management server 90 (S760). Here, switching the screen of the content application may be performed by, for example, (i) displaying a content application executed in the background on the terminal screen, (ii) updating the screen if it is already displayed on the terminal screen It can mean.

When the screen of the content application 443 is switched on the terminal 40, the viewer can search various contents on the content application 443, and when the viewer selects a specific content (S770) 10). In one embodiment, the content selection information may be transmitted to the set-top box 10 via the ID management server 90.

The set-top box 10 requests the VOD server 80 for the content selected by the viewer and the VOD server 80 transmits the requested content to the set-top box 10 (S790) The control unit 10 outputs the content through the TV 30 (S795).

As described above, the viewer can output the contents desired by the viewer to the TV 30 through the operation of searching for and selecting the contents on the terminal 40, It is possible to enjoy the convenience of home shopping by eliminating the inconvenience of searching for contents only.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

10: Set-top box
20: sound processing server
30: TV
40:
50: Program Provider
60: Platform History
70: Relay server
80: VOD server
90: ID management server

Claims (19)

A method for processing a sound signal in a set top box receiving a broadcast program and providing the same to a TV,
Receiving a broadcast program;
A first determination step of determining whether to output a set-top box-related ID when outputting the audio signal of the broadcast program to a TV;
Generating a sound wave including an ID of the non-audible range including the set-top box-related ID when it is determined to output the set-top box-related identification information (ID); And
And outputting the generated ID-containing sound wave together with an audio signal of the broadcast program to a TV,
The set-top box-related ID includes (i) a set-top box ID identifying the set-top box; And (ii) an application ID for identifying a channel-linked application executed in the set-top box and a broadcast program ID for identifying the broadcast program. The method according to claim 1,
Wherein the first determination step is executed in a server communicably connected to the set-top box, and the set-top box receives a result of the determination performed in the server. The method according to claim 1, further comprising, prior to the step of generating the ID-
A second determination step of determining whether the broadcast program ID exists in the non-audible bandwidth of the broadcast program; And
And removing the non-audible signal of the received broadcast program if the broadcast program ID exists in the non-audible range as a result of the second determination. The method of claim 3,
Wherein at least one of the first and second determination steps is executed in a server communicably connected to the set-top box, and the set-top box receives the result of the determination executed in the server. Way. The method according to claim 1,
Wherein the first determination step is performed based on a broadcast channel for transmitting the broadcast program or the broadcast program to the settop box. The method according to claim 1,
Wherein the first determination step is performed every time a broadcast channel for transmitting a broadcast program to the set-top box is changed. A sound wave signal processing system for processing a sound wave signal included in a broadcast program,
A sound wave signal filtering unit operable in a set-top box or a server communicably connected to the set-top box and configured to extract or remove an audible frequency band signal by filtering the sound wave signal of the received broadcast program;
A sound wave signal generator operable in the set-top box and configured to generate a sound wave including the ID of the non-audible band including the set-top box-related identification information; And
The settop box or the server, and is further operable to determine whether or not a broadcast program ID for identifying a broadcast program exists in the non-audible range of the received broadcast program, and a set-top box related ID when outputting the audio signal of the broadcast program to a TV And outputting the combined signal to the sound processing unit. 8. The method of claim 7,
The set-top box-related ID includes (i) a set-top box ID identifying the set-top box; And (ii) an application ID for identifying a channel-linked application executed in the set-top box and a broadcast program ID for identifying the broadcast program. 8. The method of claim 7,
Wherein the determination unit determines whether to output the set-top box-related ID together based on a broadcast channel for transmitting the broadcast program or the broadcast program to the set-top box. A content providing method for providing an on-demand content to a TV viewer in a set-top box receiving a broadcast program and providing the broadcast program to a TV,
Generating a sound wave including an ID of a non-audible range including a set-top box ID for identifying a set-top box, and outputting the sound wave together with an audio signal of the broadcast program to a TV;
Receiving a result of selecting a content from a terminal receiving the ID-containing sound wave and extracting the set-top box ID from the terminal;
Requesting the selected content to an on-demand content server; And
And receiving the content from the on-demand type content server and outputting the content through a TV,
Wherein the set-top box outputs at least one of an application ID for identifying a channel-linked application executed in the set-top box and a broadcast program ID for identifying the broadcast program, through a TV or a broadcast server communicably connected to the set- To the content providing apparatus. 11. The method of claim 10,
Wherein the sound wave including the ID further includes at least one of the application ID and the broadcast program ID. 11. The method of claim 10,
The set-top box transmitting at least one of the application ID and the program ID to the relay server simultaneously or sequentially with the step of generating the ID-containing sound wave and outputting it to the TV,
Wherein the terminal receives at least one of the application ID and the broadcast program ID from the relay server. 13. The method according to claim 11 or 12,
Wherein the terminal switches the screen of the content application for content search based on the application ID or the broadcast program ID. The method according to claim 10, wherein the step of generating the ID-
Receiving a broadcast program;
Determining whether at least one of whether a broadcast program ID exists in a non-audible band of the received broadcast program and whether or not to output a set-top box related ID when outputting the audio signal of the broadcast program to a TV; And
And generating ID-included sound waves by injecting the set-top box-related ID into a non-audible band sound wave,
The set-top box-related ID includes (i) the set-top box ID; And (ii) at least one of the application ID and the broadcast program ID. The method according to claim 10, wherein the step of generating the ID-
Transmitting a set-top box related ID to the relay server;
Receiving, from the relay server, a temporary set-top box ID capable of identifying the set-top box; And
And injecting the temporary set-top box ID into a non-audible band sound wave to generate the ID sound wave,
The set-top box-related ID includes (i) the set-top box ID; And (ii) at least one of the application ID and the broadcast program ID. A content providing method for providing on-demand content to a TV viewer through a TV set-top box using a mobile terminal,
Receiving the sound wave signal output from the TV and extracting identification information (ID) included in the non-audible frequency band of the sound wave signal;
Switching a screen of a content application for content search based on the extracted ID; And
And transmitting the selection result to the settop box when a predetermined content is selected by user input in the content application,
The ID includes (i) a set-top box ID identifying the set-top box; (ii) an application ID that identifies the set-top box ID and the channel-linked application running in the set-top box; And (iii) a broadcast program ID for identifying the set-top box ID and the broadcast program; ≪ / RTI > 17. The method of claim 16,
Wherein the terminal receives at least one of the application ID and the broadcast program ID through an audio signal output from the TV or receives the broadcast program ID from a relay server communicably connected to the terminal. 17. The method of claim 16,
Wherein the set-top box requests the selected content to the on-demand type content server upon receiving the content selection result, and outputs the selected content on a TV when receiving the content from the on-demand type content server. A computer-readable recording medium recording a sound signal processing application for processing a sound signal output from a TV to provide on-demand content to a TV viewer through a set-top box for a TV,
The sound wave signal processing application is loaded into a memory of the mobile terminal to execute a method of processing sound wave signals on the terminal,
The method of processing an acoustic signal,
Receiving an acoustic wave signal output from a TV and extracting identification information (ID) included in the non-audible frequency band of the acoustic wave signal; And
And switching the screen of the content application for content search based on the extracted ID,
The ID includes (i) a set-top box ID identifying the set-top box; (ii) an application ID that identifies the set-top box ID and the channel-linked application running in the set-top box; And (iii) a broadcast program ID for identifying the set-top box ID and the broadcast program; Wherein the sound wave signal processing application is one of the sound wave signal processing application and the sound wave signal processing application.

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