KR20160079577A - Method and apparatus for reproducing content using metadata - Google Patents

Abstract

Disclosed is a content playing method, comprising: a step of acquiring meta data including content property information; a step of acquiring information associated with an environment in which content is played; a step of determining a parameter to play the content, based on the information associated with the environment and the meta data; and a step of playing the content based on the determined parameter. The present invention provides a content playing method by using information associated with a surrounding environment in order to play content in an optimized manner.

Description

METHOD AND APPARATUS FOR REPRODUCING CONTENT USING METADATA [0002]

The present invention relates to a method and apparatus for reproducing contents using metadata.

Content is produced by various environments and equipment according to the intention of the content creator. The content may further include metadata including information such as a genre of the content, an artist, and the like. The reproducing apparatus can reproduce the content by setting an output environment according to the genre of the content included in the meta data, the characteristics of the content such as an artist, and the like.

However, in the reproducing apparatus, when the output environment is set collectively without considering the specifications and the state of the reproducing apparatus, it is difficult for the contents to be reproduced in the optimum state.

Accordingly, there is a need for a method of effectively reproducing contents by utilizing metadata including information on the characteristics of the contents.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing contents using meta data including information about characteristics of contents and information about a surrounding environment in which contents are to be reproduced in order to reproduce contents in an optimal state.

According to an embodiment of the present invention, there is provided a method of reproducing content, comprising: obtaining metadata including information on characteristics of the content; Obtaining information on an environment in which the content is to be reproduced; Determining parameters for reproducing the content based on the information about the environment in which the content is to be reproduced and the metadata; And reproducing the content based on the determined parameter.

In addition, the step of determining the parameter may include determining a parameter capable of minimizing a difference between the information on the characteristic of the content included in the metadata and the information on the environment in which the content is to be reproduced.

In addition, the information on the environment in which the content is to be reproduced may be generated in a syntax form or another form, and the step of determining the parameter may include the step of determining information about a characteristic of the content included in the meta data in a systax form, Into a form.

In addition, determining the parameters may include determining constraints based on information about the environment in which the content is to be played back; And determining the parameter based on the constraint.

In addition, the information about the characteristics of the content included in the metadata includes energy information for each playback period of the content, and the step of determining the parameters includes: And determining the restriction condition; And determining the parameter based on the constraint and the energy information.

In addition, the information on the characteristics of the content exists for each sound source included in the content, and the step of determining the parameter includes determining the parameter for reproducing the content based on the sound source-specific information .

In addition, the characteristic information of the content may include energy information for each frequency band of the content, and the step of determining the parameter may include the step of determining, based on the energy information, And determining the parameter.

In addition, the characteristic information of the content includes information on the frequency response characteristic of the content, and the step of determining the parameter includes determining, based on the frequency response characteristic information of the metadata and the information on the environment in which the content is to be reproduced And determining the parameter for reproducing the content.

In addition, the characteristic information of the content included in the meta data includes setting information for reproduction of the content for each device or reproduction function for which the content is to be reproduced, and the step of determining the parameter comprises: And determining the parameter for reproducing the content.

Receiving the reproduced content through an input device based on the determined parameter; Updating information on an environment in which the content is to be played back based on the received content; Further comprising the step of re-determining the parameter based on the difference between the characteristic information of the content and the updated information included in the meta data.

In addition, the characteristic information of the content included in the meta data may include energy information for each reproduction section of the content, and the determining of the parameter may include: determining, based on the energy information of the meta data, Determining a parameter for controlling a power source of a device to be reproduced according to a playback interval of the content, and controlling the power source for each playback interval of the content based on the determined parameter.

In addition, the information on the environment in which the content is to be reproduced includes at least one of the specification and status information of the device on which the content is to be reproduced, the environment information of the device on which the content is reproduced, and characteristics of the user.

In addition, the metadata may include information on the identification of the content, information on the intention of the producer that produced the content, information on the environment in which the content is made, information on the listening condition of the content, And information on the type of the information.

According to an exemplary embodiment of the present invention, a device for reproducing a content may be configured to acquire metadata including information on a characteristic of the content and information on an environment in which the content is to be reproduced, A control unit for determining a parameter for reproducing the content based on the metadata; And a playback unit for playing back the content based on the determined parameter.

A computer readable recording medium according to an exemplary embodiment of the present invention records a program for implementing a method of reproducing contents using metadata.

A computer program according to an embodiment executes a method of reproducing contents using metadata in combination with hardware.

1 is a block diagram showing an internal configuration of a device according to an embodiment.
2 is a block diagram showing an internal configuration of a device including a profile mapper according to an embodiment.
3 is a block diagram illustrating an internal configuration of a device and a profile server according to an embodiment.
4 is a flowchart illustrating a method of reproducing contents using metadata according to an exemplary embodiment of the present invention.
FIG. 5 is a flowchart illustrating a method of reproducing metadata by converting metadata information into a syntax form according to an exemplary embodiment of the present invention.
6 is an exemplary diagram illustrating an example of determining parameters using metadata according to an embodiment.
FIG. 7 is a view illustrating an example of reproducing contents according to energy information of each frequency band of metadata according to an exemplary embodiment.
FIG. 8 is an exemplary view showing an example of reproducing contents according to information on frequency response characteristics of metadata according to an embodiment.
FIG. 9 is an exemplary view showing an example of reproducing contents according to energy information of each section of metadata according to an embodiment.
FIG. 10 is a flowchart illustrating a method of controlling power of a device in which contents are reproduced according to energy information of each section of metadata according to an embodiment.
11 is a block diagram showing an internal configuration of a device according to an embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed in an ordinary or dictionary sense, and the inventor shall properly define the terms of his invention in the best way possible It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

In the accompanying drawings, some of the elements are exaggerated, omitted or schematically shown, and the size of each element does not entirely reflect the actual size. The invention is not limited by the relative size or spacing depicted in the accompanying drawings.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, as used herein, the term "part " refers to a hardware component such as software, FPGA or ASIC, and" part " However, "part" is not meant to be limited to software or hardware. "Part" may be configured to reside on an addressable storage medium and may be configured to play back one or more processors. Thus, by way of example, and not limitation, "part (s) " refers to components such as software components, object oriented software components, class components and task components, and processes, Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functions provided in the components and "parts " may be combined into a smaller number of components and" parts " or further separated into additional components and "parts ".

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing an internal configuration of a device according to an embodiment.

The device 120 according to one embodiment may be, for example, a mobile phone, a tablet PC, a PDA, an MP3 player, a kiosk, an electronic frame, a navigation device, a digital TV, a wrist watch, And a wearable device.

The device 120 can reproduce the content 130 using the metadata 131 including the characteristic information of the content 130 and the reproduction environment information 110 of the device 120 on which the content 130 is to be reproduced .

The content 130 according to an exemplary embodiment may include at least one of audio data and image data. Also, the content 130 may be multimedia data. Alternatively, the content 130 may include various types of data that can be output to a user.

The content 130 may include metadata 131 including content data 132 and characteristic information about the content 130. [ The metadata 131 includes not only the identification information on the content 130 but also the genre of the content 130, the production environment, the characteristic information of the content 130 based on the intention of the producer who produced the content 130, And information on the result of analyzing the image. The information on the result of analyzing the content 130 may include bit information of the content 130, frequency response characteristic information, energy information per frequency band, and the like. The device 120 or the external server device can be generated by analyzing the content 130 if the information about the genre of the content 130 or the result of analyzing the content 130 is not included in the metadata 131 have.

Metadata 131 may include information about the characteristics of content 130, including conditions under which content 130 may be effectively played back. Therefore, the device 120 can determine the parameters based on the characteristic information of the contents 130 of the metadata 131, and can effectively reproduce the contents 130 based on the determined parameters.

The metadata 131 may further include information on the type of audio data of the content data 132. [ For example, the metadata 131 may include information on whether the type of the audio data of the content data 132 corresponds to extended audio data. While the existing audio data is composed of units of 192 kHz and 24 bits, the extended audio data can be composed of units of 192 kHz and 32 bits. Extended audio data has more bits than conventional audio data, so it can contain more information that can contribute to sound quality. Therefore, when contents are reproduced in accordance with the extended audio data, audio data with improved sound quality can be output. When the device 120 determines that the content data 132 is extended audio data based on the meta data 131, the device 120 can reproduce the content based on the extended audio data of the 32-bit unit.

The parameter may be used to change the characteristics of the content 130 being played back. The device 120 may use parameters to control the characteristics of the content 130 being reproduced such as the volume, tone color, bit sense, and the like.

In one embodiment, the fact that the content 130 is effectively played back may mean that the content 130 is reproduced in an optimal state in consideration of the user, the environment, and the state of the device 120 . The device 120 can effectively reproduce the content 130 according to the parameters determined based on the metadata 131 and the reproduction environment information 110. [

The playback environment information 110 may include environment information of the device 120 on which the content 130 is to be reproduced. The playback environment information 110 may include at least one of information on the user of the device 120, information on the hardware specification and status of the device 120, and information on the surrounding environment of the device 120 have.

For example, the information about the user may include a preference genre of the user, a type of the musical instrument preferred by the user, whether the user is in a state of sleep, learning, rest, and the like. The information about the hardware specification of the device 120 may include the function, kind, and the like of the speaker provided in the device 120. [ Information about the state of the device 120 includes information about the environment of the device 120 such as information about resonance that may occur in a room where the device 120 is located, . The peripheral environment information of the device 120 may include information on the surrounding environment that may affect the characteristics of the content 130 that the user can perceive. The device 120 can effectively reproduce the content 130 according to the reproduction environment information 110 by determining the parameters considering the metadata 131 and the reproduction environment information 110. [

Referring to FIG. 1, the device 120 may include a receiving unit 121, a control unit 122, and a reproducing unit 123. In the drawings and in the embodiments described below, the individual components included in the device 120 may be distributed and arranged in physical or logical form and may be integrated.

The receiving unit 121 can acquire the reproduction environment information 110 and the contents 130. [ The reproduction environment information 110 may be obtained from information directly set by the user or may be obtained through a predetermined algorithm. The content 130 may be received from an external device or may be obtained from a storage area of the device 120. [

The control unit 122 can determine the parameters using the reproduction environment information 110 obtained by the receiving unit 121 and the metadata 131 of the contents 130. [ Then, the playback unit 123 can play back the content 130 based on the parameters. The control unit 122 may compare the reproduction environment information 110 of the device 120 with the characteristic information of the content included in the metadata 131 to determine a parameter for reproducing the content. The control unit 122 may determine the parameters to minimize the difference between the playback environment information 110 and the characteristic information of the content included in the metadata 131. [

The reproduction environment information 110 and the metadata 131 may be in the form of a syntax. The syntax type can mean a form in which data is expressed according to a grammar that can be recognized by a computer. The device 120 can determine the parameters to minimize the difference between the reproduction environment information 110 and the characteristic information of the contents of the metadata 131 on the basis of the syntax environment information 110 and the metadata 131 have.

Hereinafter, a more detailed description will be given with reference to FIG. 2 and FIG.

2 and 3, the metadata 131 of the content may include a creator profile including characteristic information of the content. The playback environment information 110 may include a user profile including information on the environment in which the content is to be played back. Hereinafter, it will be described with reference to a manufacturer profile and a user profile.

2 is a block diagram showing an internal configuration of a device including a profile mapper according to an embodiment.

The content 230 may include a producer profile 231 and content data 232. The producer profile 231 may be included in the above-described metadata 130 and may include information on the characteristics of the content 230. The content data 232 may include data for reproduction of the content 230.

The producer profile 231 may be included in the form of a header file in the content 230 or may be stored in an external device or a profile server. The producer profile 231 may contain information about the content characteristics of a comment type or syntax type such as an ID3 tag. If the producer profile 231 contains data other than a comment form or a syntax form, the above-described data can be converted into a syntax form by the profile mapper 211. [

Hereinafter, an example of information that can be included in the manufacturer profile 231 will be described in detail with reference to Table 1.

Producer Profiles size Contents Spectral Energy Information 5 * 8 = 40bit Range of energy level difference = 32dB
Number of frequency bands = 8 Content genre information 4bit When dividing into 16 categories Average energy information 4bit Average energy information per playback interval Peak energy information 5bit Relative to average energy level Frequency Response Characteristics 3bit When classifying into 8 classes Actual vocal / instrument volume 4bit 16 Separate by volume Vocal / instrument information in contents 5bit When it is divided into 32 categories Vocal / instrument band information 3bit When the frequency band is divided into eight Gain Range 3bit Scope to apply gain to vocals / instruments The damping factor 3bit Level of sense of beat Acoustic propensity for tube amp 3 + 4bit When classifying into 8 classes (3 bits)
Musical key of contents (4bit) About BPM (bitmap) 16bit Bits per minute Distance between left and right speakers Distance value Priority by sound source Ranking emphasized by sound source
Ex) Vocal>Bass> Drums Kick drum peak frequency / level Resonance frequency and magnitude level of the kick drum

The producer profile 231 may include spectral energy information including information on energy level differences for each frequency band of the content 230. [ For example, when the frequency band number is 8 and the energy level difference range is 32, the spectral energy information may include data of 5 * 8 = 40 bits in size.

The device 200 may determine a parameter for a smoothing cue based on the spectral energy information that allows the sound effect to be applied in a way that is not too high or too low depending on the spectral energy level included in the content.

The producer profile 231 may further include information on the content genre. When the category is 16, the content genre information may include 4-bit data. The device 200 can determine the parameters so that the content characteristics such as sound quality and tone color corresponding to the genre can be implemented according to the content genre information. In addition to the device 200, the device 200 can determine the parameters by further considering the information of the user profile as well as the information of the manufacturer profile described above. For example, the device 200 may determine the parameters in consideration of the user's preference genre of the user profile or information of the user's state (e.g., sleep, study, exercise status, etc.).

The producer profile 231 may include average energy information and peak energy information for each playback period of the content. The device 200 can determine whether the energy of the content determined from the average, peak energy information is appropriate based on the user profile. For example, the device 200 tries to reproduce the content according to the user profile so that the current time falls in the night time zone, or the user is in the sleep state and the sound is output below a predetermined level. The device 200 can determine whether the sound of the content can be output below a predetermined level based on the average energy and peak energy information of the producer profile 231. [ When it is determined that the sound of the content is to be output at a predetermined level or higher, the device 200 may determine the parameter so that the sound of the content is output to a predetermined level or lower. The device 200 can reproduce the content for which the sound is output at a predetermined level or lower based on the parameter.

Information on the frequency response characteristics of the producer profile, the volume of the actual vocal / musical instrument, the vocal / musical instrument information in the contents, the vocal / instrument band information, the gain application range, the damping factor, and the BPM information, It is information that can be determined accordingly. The device 200 can reproduce the content close to the contents production environment or the intention of the contents producer by using the parameters minimizing the difference between the user profile and the producer profile. The device 200 may determine a parameter that minimizes the difference between the reproduction environment information of the user profile and the characteristic information of the content of the producer profile.

The producer profile may include information about the frequency response characteristics. The frequency response characteristic can determine the characteristics of the sound that the user can perceive. For example, when the energy of the low frequency band of the audio signal is high, a sound rich in bass and strong can be outputted. On the other hand, when the energy of the high frequency band of the audio signal is high, a treble sound is emphasized and outputted, so that a brilliant sound can be outputted. The characteristics of the sound to be output can be determined according to the frequency response characteristic. The producer profile may include information on the frequency response characteristics determined according to the production environment, the genre of the contents, the intention of the producer, and the like. The device 200 may determine the parameters such that sound is output in close proximity to the frequency response characteristics contained in the manufacturer profile.

The producer profile may include the actual volume of the vocal or musical instrument in the content production environment. The device 200 can determine the parameter so that sound is outputted in close to the actual volume of the vocal or musical instrument at the time of content production.

The producer profile may include information indicative of a vocal or musical instrument in the content. The device 200 can determine the parameters differently for the vocal or musical instrument in the same contents by using the information indicating the vocal or musical instrument in the content.

The producer profile may include frequency band information for each sound source such as vocals, musical instruments, and the like. Since the frequency bands of the respective sound sources are different from each other according to the sound sources, the device 200 can output differentiated sounds by emphasizing the sound sources of a specific frequency band. For example, the device 200 can make the sound source of a specific frequency band clearer or larger.

The producer profile may include information about the gain coverage. The device 200 can emphasize the vocal or musical instrument by applying a gain to the vocal or musical instrument. However, the device 200 can prevent the degradation of the overall sound quality due to the excessive sound source emphasis by applying the gain only within the gain application range.

The manufacturer profile may include information about the damping factor and the BPM. The damping factor is information indicating tightness of bits, and BPM is information indicating the number of bits per minute. Depending on the damping factor and the BPM, the sound quality, tone and bit sense that the user can perceive can be changed. The device 200 can output the sound close to the damping factor, BPM of the producer profile, but can determine the parameters such that the sound can be outputted considering the user's taste, condition, and the like.

The manufacturer profile may include information for controlling acoustical propensity for the tube amp. Unlike conventional loudspeakers, amplifiers have excellent resolution, depth, ambience, and dynamics. Therefore, the device 200 capable of outputting sound through the amplification amplifier is capable of finer control over the above-described characteristic information of the sound. When the device 200 can output sound through the vacuum tube amplifier, the device 200 can output sound based on the acoustic propensity information for the vacuum tube amplifier. Without being limited to a tube amp, the manufacturer profile can include information about various types of speakers.

The producer profile may further include information about the distance between the left and right speakers, the priority for each sound source, the resonance frequency of the kick drum, and the magnitude level. The above-described information may be information determined according to the intention of the content creator. The device 200 may determine the parameters to minimize the difference between the characteristic information of the contents of the producer profile and the reproduction environment information of the user profile.

For example, it is assumed that the information about the distance between the left and right speakers included in the manufacturer profile is 3 m, and the information about the distance between the left and right speakers included in the user profile is 2 m. The device 200 may compare the information contained in the manufacturer profile and the user profile to determine the parameters. The device 200 can actually determine the parameters so that the distance between the left and right speakers is 2 m but the content to be reproduced has the characteristics when the distance between the left and right speakers is 3 m. In one example, the parameter may be determined as a value that increases the difference in sound level or the difference in phase level of the sound source output between the left and right speakers.

The device 200 may include a control unit 210 and a playback unit 220.

The control unit 210 may include a profile mapper 211 for converting the producer profile 231 into a syntax form and a parameter determination unit 212 for determining the parameters based on the difference between the producer profile 231 and the user profile have.

The profile mapper 211 can convert the information contained in the producer profile, not the syntax form, into a syntax form. The information of the producer profile is converted into the syntax form by the profile mapper 211, so that the device 200 can determine the parameters based on the difference between the producer profile and the user profile. The profile mapper 211 can convert the information of the producer profile into various forms instead of the syntax form.

The parameter determination unit 212 can determine a parameter that minimizes the difference between the producer profile and the user profile of the syntax form. The device 200 may not reproduce the contents in an optimal state according to the specifications of the apparatus in which the contents are reproduced, the preferences of the users, tastes, etc., even if the contents are reproduced according to the producer profile. Therefore, the parameter determination unit 212 can limit the information of the user profile including the information on the playback environment that may affect the characteristics of the content being played back.

For example, it is assumed that the user profile includes information about the maximum value of the volume level that can be output from the speaker. The parameter determination unit 212 can determine the parameter with the maximum value of the volume level output from the speaker as a restriction condition. When the maximum value of the volume level of the content included in the producer profile is 100 dB and the maximum value of the volume level outputable by the speaker is 95 dB, the parameter determination section 212 determines the parameters so that the content can be reproduced at a level below 95 dB .

As another example, assume that the user profile includes information about the noise magnitude of the surrounding environment. The parameter determination unit 212 can determine the parameters with the noise level of the surrounding environment as the limiting condition. If the minimum value of the volume level of the content included in the producer profile is 20 dB and the noise level of the surrounding environment is 50 dB, the parameter determination unit 212 determines whether the content is reproduced at a level higher than 50 dB, Parameters can be determined.

The parameter determination unit 212 can adaptively determine a parameter for each sound source. For example, it is assumed that the priorities are determined in the order of vocal, piano, and base among the sound sources included in the content according to the producer profile. When the parameter determination unit 212 sets the restriction condition according to the user profile and determines the parameter, the parameter can be determined differently for each sound source according to the priority. For example, when a parameter for increasing the sound level of the content is determined according to the noise level of the surrounding environment, the parameter determination unit 212 sets the parameter level of the sound level of the vocal, piano, Can be determined. The rise of the sound level of the vocal is the highest, and the base can be the lowest. The parameters can be determined periodically. The parameter determination unit 212 can determine a parameter having a different value according to time.

The user profile may be periodically generated in the form of a syntax in the device 200. The user profile may include information such as user preference, taste and the like input by the user, information on the speaker on which the content is output, information on the surrounding environment in which the speaker is located, and the like.

The playback unit 220 can play back the content based on the parameters determined by the parameter determination unit 212. [ The parameter may have a different value depending on the corresponding content or time.

The device 200 can again determine the parameters based on the information of the fed user profile by generating or updating the information of the user profile based on the content reproduced by the reproducing unit 220. [ For example, the device 200 can receive the audio signal of the content output through the speaker via the microphone. The device 200 may generate or update information of the user profile based on the received audio. The device 200 may generate or update information on the speaker's status information and the room in which the speaker is located, based on the received audio information. The state information of the speaker may include information on the characteristics of the relationship between the input signal and the output signal of the speaker. The information on the space in which the speaker is located may include information on resonance occurrence, noise level information, and reflection sound.

3 is a block diagram illustrating an internal configuration of a device and a profile server according to an embodiment.

The device 310 shown in Figure 3 may receive the producer profile 321 from the profile server 320 without having the profile mapper 323 differently from the device 200 of Figure 2.

Referring to FIG. 3, the profile server 320 may include a controller 322 including a profile mapper 323.

The profile server 320 may obtain the content 330 to be reproduced in the device 310 and acquire the producer profile 321 from the content 330. The producer profile 321 may be obtained from the information contained in the header file of the content 330 or may be obtained by analyzing the content data 331.

The profile mapper 323 of the control unit 322 can convert the producer profile 321 into a syntax form. The producer profile 321 transformed into the syntax form can be transferred to the device 310. [

The device 310 may include a control unit 311 and a playback unit 313. The control unit 311 can determine the parameters based on the manufacturer profile and the user profile, and the playback unit 313 can play the content based on the determined parameters.

Hereinafter, a method of reproducing contents using metadata will be described in detail with reference to FIGS. 4 and 5. FIG.

4 is a flowchart illustrating a method of reproducing contents using metadata according to an exemplary embodiment of the present invention.

Referring to FIG. 4, in step S401, the device 120 may acquire metadata including information on the characteristics of the content. The device 120 may acquire metadata about the content to be reproduced. Metadata 131 may include information about the characteristics of content 130, including conditions under which content 130 may be effectively played back.

In step S403, the device 120 can acquire information on the environment in which the content is to be reproduced. The information about the environment in which the content is to be reproduced may include at least one of information about the user of the device 120, information about the hardware specification and status of the device 120, and information about the environment of the device 120 .

In step S405, the device 120 can determine the parameters for reproducing the content based on the information about the environment and the metadata on which the content obtained in steps S401 and S403 is to be reproduced. The device 120 may determine a parameter that can minimize the difference between the information about the environment in which the content is to be reproduced and the content characteristic information included in the meta data.

In step S407, the device 120 can reproduce the content based on the parameters determined in step S405.

FIG. 5 is a flowchart illustrating a method of reproducing metadata by converting metadata information into a syntax form according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in step S501, the device 200 may obtain a producer profile including information on content characteristics. The producer profile may be included in the metadata of the content.

In step S503, the device 200 may convert the information contained in the producer profile into a syntax form. If the information contained in the producer profile is not a syntax form, the device 200 may convert information other than the syntax form contained in the producer profile into a syntax form.

In step S505, the device 200 may obtain a user profile of the syntax form. The user profile may include information such as user preference, taste and the like input by the user, information on the speaker on which the content is output, information on the surrounding environment in which the speaker is located, and the like. The user profile can be obtained periodically.

In step S507, the device 200 may determine the parameters that can minimize the difference between the producer profile and the user profile. Specifically, the device 200 may compare the information about the surrounding environment of the user profile with the characteristic information of the content included in the producer profile to determine a parameter capable of minimizing the difference.

In step S509, the device 200 can reproduce the content based on the parameters determined in step S507. The device 200 can determine the parameters in consideration of both the producer profile and the user profile, and reproduce the content based on the determined parameters, thereby more effectively reproducing the content.

6 is an exemplary diagram illustrating an example of determining parameters using metadata according to an embodiment. The metadata may include a manufacturer profile, and the device 200 may determine the parameters based on the manufacturer profile and the user profile.

610 through 630 of FIG. 6 illustrate examples of parameters that can be determined according to a manufacturer profile and a user profile.

Referring to 610, the producer profile may include content characteristic information such as 'the piano is playing at a distance of about 3 meters from the listener in the forward 45 degree direction'. The device 200 may convert the content property information of the producer profile into a syntax form. For example, the device 200 can convert the information of the manufacturer profile into information of a syntax form including coordinate information indicating the position of the sound source.

In addition, the user profile at 610 includes information about the playback environment such as 'the left speaker is about 1 m closer to the listening position, the distance between the listener and the front speaker is about 3 m, and the distance between the left and right speakers is about 2 m' . ≪ / RTI > For example, the reproduction environment information may include information of a syntax form including coordinate information indicating the position of the user and each speaker.

The parameters can then be determined based on the difference between the information of the producer profile of 610 and the information of the user profile. Specifically, as a result of performing stereo imaging in the device 200, the location where the sound source can be positioned may be different based on the information of the manufacturer profile and the information of the user profile. The device 200 can determine a parameter such that the sound source of the content can be positioned closer to the position where the sound source according to the manufacturer profile information is located, based on the position where the sound source according to the information of the user profile is positioned. As shown at 610, the device 200 may determine a parameter to adjust the phase difference between the left and right speakers to 10ms and to increase the sound level of the right speaker by 2dB. In addition, the device 200 may use the parameters determined at 610 in a spatial rendering technique such as head related transfer function (HRTF) generation and virtual ambience generation.

Referring to FIG 620, the device 200 reproduces content according to the information of the producer profile, and determines parameters for reproducing the content with the information of the user profile as a restriction condition.

The producer profile may include content property information such that the tone of the vocal is not heard to be buried in the percussion instrument and the rough feel of the string in the bass solo portion will be sufficiently expressed. The device 200 may convert the content property information of the producer profile into a syntax form. For example, the device 200 can convert information of a syntax form that includes a higher priority of vocals than the base and emphasizes the bass sound source in the characteristic reproduction section.

Also, at 620, the user profile may include information about the playback environment, such as a sound level of 82 dB or more generated in a syntax form, a sound level being currently heard = 50 dB, and the like.

The parameters can then be determined based on the difference between the information of the producer profile 620 and the information of the user profile. Specifically, the device 200 may set the information of the user profile as a restriction condition, and determine the parameters so that the content can be reproduced according to the information of the producer profile. The device 200 can increase the volume of the vocals according to the information of the producer profile and increase the volume of the base during a specific playback interval to determine the parameters so that the content is played back. As shown at 620, the device 200 may determine a parameter to set the output limit level to 82dB, increase the volume of the treble vocal by 1dB, and increase the volume of the bass, the bass, in a particular playback interval by 2dB.

630, an example of determining a parameter for reproducing a content in the device 200 with the information of the user profile as a restriction condition is shown.

The producer profile may include information about the content characteristic of 'frequency at the peak point of the kick drum = 250 Hz, level at the peak point of the kick drum = -4 dBFS'. The device 200 may convert the content property information of the producer profile into a syntax form.

Also, at 630, the user profile may include information about the playback environment, such as 'the 150 Hz band is excessively boosted due to resonance problems on the spatial structure' generated in a syntax form.

The parameters can then be determined based on the difference between the information of the producer profile of 630 and the information of the user profile. Specifically, the device 200 may determine the parameters such that the information of the user profile is restricted, and the content can be effectively reproduced. The device 200 can determine the parameter according to the information of the user profile in consideration of the frequency at the peak point of the sound source with respect to the kick drums in the content is 250 Hz and the level is -4 dBFS according to the information of the producer profile.

As shown at 630, the device 200 may determine the parameters for the parametric equalizer to adjust the frequency characteristics according to the information of the user profile. Since the resonance may occur in the 150 Hz band according to the user profile information, the device 200 can determine the parameters so that the level in the 150 Hz band is reduced. The parametric equalizer can precisely control the frequency characteristics based on the center frequency. A parametric equalizer (PEQ) can be composed of three parameters for center frequency, frequency bandwidth control, and gain control. The device 200 can determine a parameter that sets the PEQ frequency (center frequency) to 150 Hz, the PEQ gain to -6 dB, and the Q factor (control of the frequency bandwidth) to 30. The device 200 can reproduce the content based on the determined parameter.

FIG. 7 is a view illustrating an example of reproducing contents according to energy information of each frequency band of metadata according to an exemplary embodiment.

Referring to FIG. 7, spectral energy information 701 for the content to be reproduced is shown. The producer profile may include spectral energy information that can be obtained as a result of content analysis. The device 200 may determine a parameter associated with the smoothing signal 703 or 704 to correct for a point where the energy per frequency band is rapidly changed, such as the spectral energy information 701 shown. The device 200 may use the smoothing signal 703 or 704 to reproduce content having the modified spectral energy information 702. [

FIG. 8 is an exemplary view showing an example of reproducing contents according to information on frequency response characteristics of metadata according to an embodiment.

Referring to FIG. 8, at 810, graphs 811 and 812 showing frequency response characteristics of respective contents of sound sources are shown. The tone color and sound quality of the user may vary depending on the frequency response characteristics of the contents. Therefore, the device 200 can determine the parameters for modifying the frequency response characteristics of the content based on the producer profile and the user profile.

Information about the frequency response characteristics of the content to be modified may be included in the producer profile as an intent of the manufacturer. In addition, the device 200 can determine the frequency response characteristics of the content to be modified based on the playback environment information including information such as the user preference of the user profile or the user status. The device 200 can determine a parameter for reproducing the content according to the determined frequency response characteristic.

At 820, graphs 821 and 822 showing the frequency response characteristics of the content of the content that can be reproduced according to the parameters determined by the device 200 are shown. The device 200 may transform the frequency response characteristics of the content to the optimal state according to the parameters determined based on the producer profile and the user profile.

FIG. 9 is an exemplary view showing an example of reproducing contents according to energy information of each section of metadata according to an embodiment.

In FIG. 9, reference numeral 910 denotes the energy per playback interval of the original content shown on the basis of the peak energy and the average energy of the original content. The peak energy and the average energy of the original content are information that can be obtained as a result of analyzing the content, and can be included in the producer profile.

The device 200 can set the restriction condition based on the environment information of the user profile and determine the parameter according to the set restriction condition. The device 200 can determine a parameter for reproducing the content so that the maximum difference in the volume level of the contents is within 30 db according to the information of the user profile .

FIG. 10 is a flowchart illustrating a method of controlling power of a device in which contents are reproduced according to energy information of each section of metadata according to an embodiment.

Referring to FIG. 10, in step S1001, the device 200 may acquire a producer profile indicating energy information for each section of the content. The device 200 can acquire energy information for each reproduction period of the content from the average energy and peak energy information of the manufacturer profile 231 described above.

In step S1003, the device 200 can acquire a user profile. The user profile may include information about a power source provided in the device 200, and information on the surrounding environment such as an operation mode of the device 200. [

In step S1005, the device 200 can determine a parameter for controlling the power source of the device 200, on which the content is reproduced, on the basis of the producer profile and the user profile acquired in steps S1001 and S1003 for each reproduction section. Specifically, the device 200 may determine the restriction condition based on the information of the user profile. For example, a constraint condition may be determined based on information about the available power supply energy levels contained in the user profile, the mode of the device 200 in operation (power saving mode, etc.), and the like. The device 200 can control the power of the device 200 according to the energy information for each reproduction period of the content based on the restriction condition.

For example, when information on the maximum and minimum power energy levels is determined as a constraint condition, the device 200 can determine a parameter for modifying the energy of each content in the reproduction interval according to the constraint condition. The device 200 may determine a parameter for controlling the power supply level to be supplied to the device 200 according to the modified energy of the reproduction section.

In step S1007, based on the parameters determined in step S1005, the device 200 can control the power source of the device 200 on which the content is reproduced, for each reproduction section.

Hereinafter, the internal components of the device will be described in detail with reference to FIG.

11 is a block diagram showing an internal configuration of a device according to an embodiment.

FIG. 11 is a block diagram illustrating an internal configuration of a device 1100 that reproduces content using metadata according to an embodiment. The device 1100 of FIG. 11 may correspond to the devices 120, 200, 310 of FIGS. 1-3.

11 includes a memory 1120, a GPS chip 1125, a communication unit 1130, a video processor 1135, an audio processor 1140, a user input unit 1145, a microphone unit 1150, A speaker unit 1160, a motion sensing unit 1165, a controller 1170, and the like.

The configuration of the device 1100 shown in Fig. 11 can be applied to various devices such as a mobile phone, a tablet PC, a PDA, an MP3 player, a kiosk, an electronic frame, a navigation device, a digital TV, a wrist watch, And a wearable device such as a display device.

Hereinafter, the components will be described in order.

The display unit 1110 may include a controller (not shown) for controlling the display panel 1111 and the display panel 1111. The display panel 1111 is implemented with various types of displays such as a liquid crystal display (LCD), an organic light emitting diode (OLED) display, an active matrix organic light-emitting diode (AM-OLED), and a plasma display panel . The display panel 1111 can be embodied as being flexible, transparent or wearable. The display unit 1110 may be combined with the touch panel 1147 of the user input unit 1145 and provided as a touch screen. For example, the touch screen may include an integrated module in which the display panel 1111 and the touch panel 1147 are combined in a laminated structure.

The display unit 1110 can display an image corresponding to the audio signal output by the speaker unit 1160 under the control of the controller 1170. [ An image that can be displayed by the display unit 1110 may include not only a plane image but also a three-dimensional image.

The memory 1120 may include at least one of an internal memory (not shown) and an external memory (not shown).

The built-in memory may be a volatile memory (for example, a dynamic RAM (DRAM), a static random access memory (SRAM), a synchronous dynamic RAM (SDRAM), or the like), a nonvolatile memory (e.g., an OTPROM ), A PROM (Programmable ROM), an EPROM (Erasable and Programmable ROM), an EEPROM (Electrically Erasable and Programmable ROM), a Mask ROM, a Flash ROM etc.), a hard disk drive (HDD), or a solid state drive . According to one embodiment, the controller 1170 may load and process commands or data received from at least one of the non-volatile memory or other components into the volatile memory. In addition, the control unit 1170 can store data received or generated from other components in the nonvolatile memory.

The external memory may store at least one of CF (Compact Flash), SD (Secure Digital), Micro-SD (Micro Secure Digital), Mini-SD (Mini Secure Digital), xD .

The memory 1120 may store various programs and data used in the operation of the device 1100. [ According to an exemplary embodiment, the memory 1120 may temporarily or semi-permanently store at least one of content, playback environment information, a user profile, and a manufacturer profile.

The control unit 1170 may control the display unit 1110 such that a part of the information stored in the memory 1120 is displayed on the display unit 1110. [ In other words, the control unit 1170 can display the content stored in the memory 1120 on the display unit 1110. [ Alternatively, when the user gesture is performed in one area of the display unit 1110, the controller 1170 may perform a control operation corresponding to the gesture of the user.

The controller 1170 according to an exemplary embodiment may determine a parameter for reproducing the content based on metadata including information on the characteristics of the content and information on the environment in which the content is to be reproduced. Then, the control unit 1170 can reproduce the content based on the determined parameter. The control unit 1170 can determine parameters that can minimize the difference between the information about the characteristics of the content of the metadata and the information about the environment in which the content is to be reproduced. The control unit 1170 can effectively reproduce the content by determining the parameters considering the information of the metadata as well as the reproduction environment information.

The control unit 1170 may include at least one of a RAM 1171, a ROM 1172, a CPU 1173, a GPU (Graphic Processing Unit) 1174, and a bus 1175. [ The RAM 1171, the ROM 1172, the CPU 1173 and the GPU 1174 may be connected to each other via a bus 1175. [

The CPU 1173 accesses the memory 1120 and performs booting using the O / S stored in the memory 1120. [ Various operations are performed using various programs stored in the memory 1120, contents, a user profile, a manufacturer profile, metadata, and the like.

A ROM 1172 stores a command set for booting the system and the like. For example, when a turn-on command is inputted and power is supplied, the device 1100 copies the O / S stored in the memory 1120 to the RAM 1171 according to a command stored in the ROM 1172, You can boot the system by running / S. When the booting is completed, the CPU 1173 copies various programs stored in the memory 1120 to the RAM 1171, executes the program copied to the RAM 1171, and performs various operations.

When the booting of the device 1100 is completed, the GPU 1174 displays the UI screen in the area of the display unit 1110. [ Specifically, the GPU 1174 may generate a UI screen including various objects such as contents, icons, menus, and the like. The UI screen according to an exemplary embodiment may be a UI screen that can be used to output content. The GPU 1174 computes an attribute value such as a coordinate value, a shape, a size, and a color to be displayed by each of the objects according to the layout of the screen. Then, the GPU 1174 can generate screens of various layouts including the objects based on the calculated attribute values. The screen generated by the GPU 1174 may be provided to the display unit 1110 and displayed in each area of the display unit 1110.

The GPS chip 1125 can receive the GPS signal from a GPS (Global Positioning System) satellite and calculate the current position of the device 1100. The control unit 1170 can calculate the user position using the GPS chip 1125 when using the navigation program or when the user's current position is required.

The communication unit 1130 can perform communication with various types of external devices according to various types of communication methods. The communication unit 1130 may include at least one of a Wi-Fi chip 1131, a Bluetooth chip 1132, a wireless communication chip 1133, and an NFC chip 1134. The control unit 1170 can perform communication with various external devices using the communication unit 1130. For example, the control unit 1170 can receive content, a user profile, a manufacturer profile, and the like using the communication unit 1130. [

The Wi-Fi chip 1131 and the Bluetooth chip 1132 can perform communication using the WiFi method and the Bluetooth method, respectively. When using the WiFi chip 1131 or the Bluetooth chip 1132, various connection information such as an SSID and a session key may be transmitted and received first, and communication information may be used to transmit and receive various information. The wireless communication chip 1133 refers to a chip that performs communication according to various communication standards such as IEEE, ZigBee, 3G (3rd Generation), 3GPP (Third Generation Partnership Project), LTE (Long Term Evolution) The NFC chip 1134 refers to a chip operating in an NFC (Near Field Communication) mode using 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860 to 960 MHz and 2.45 GHz.

The video processor 1135 can process the video data of the content received through the communication unit 1130 or the video data of the content stored in the memory 1120. The video processor 1135 can perform various image processing such as decoding, scaling, noise filtering, frame rate conversion, resolution conversion, and the like on the image data. The display unit 1110 can display the image data processed by the video processor 1135.

The audio processor 1140 can process the audio data of the content received through the communication unit 1130 or the audio data of the content stored in the memory 1120. [ In the audio processor 1140, various processes such as decoding or amplification of audio data, noise filtering, and the like can be performed. For example, the audio processor 1140 can process and output the audio data according to the parameters determined based on the meta data and the surrounding environment information by the control unit 1470.

The control unit 1170 can play the multimedia content by playing the multimedia content by running the video processor 1135 and the audio processor 1140. [ The speaker unit 1160 can output the audio data generated by the audio processor 1140. For example, the control unit 1170 may process the multimedia contents displayed on the display unit 1110 using the video processor 1135 and the audio processor 1140.

The user input unit 1145 can receive various commands from the user. The user input 1145 may include at least one of a key 1146, a touch panel 1147, and a pen recognition panel 1148. [ The device 1100 may output video and audio signals of content according to user input received from at least one of the key 1146, the touch panel 1147, and the pen recognition panel 1148, or may generate a user profile.

The key 1146 may include various types of keys, such as mechanical buttons, wheels, etc., formed in various areas such as the front or side of the body exterior of the device 1100,

The touch panel 1147 senses a user's touch input and outputs a touch event value corresponding to the sensed touch signal. When the touch panel 1147 is combined with the display panel 1111 to form a touch screen (not shown), the touch screen may be implemented by various types of touch sensors such as an electrostatic type, a pressure sensitive type, a piezoelectric type, The electrostatic type is a method of calculating the touch coordinates by sensing the minute electricity generated by the user's body when a part of the user's body is touched on the touch screen surface by using a dielectric coated on the surface of the touch screen. The depressurization type includes two electrode plates built in the touch screen. When the user touches the screen, the upper and lower plates of the touched point contact each other to sense current flow, and the touch coordinates are calculated. A touch event occurring on a touch screen can be generated by a finger of a person, but can also be generated by a conductive material capable of applying a capacitance change.

The pen recognition panel 1148 detects proximity or touch input of the pen as a result of operation of the user's touch pen (e.g., a stylus pen, a digitizer pen) Touch events can be output. The pen recognition panel 1148 may be implemented, for example, in an EMR manner and may sense a touch or proximity input according to proximity of a pen or change in intensity of an electromagnetic field due to a touch. In detail, the pen recognition panel 1148 includes an electromagnetic induction coil sensor (not shown) having a grid structure and an electronic signal processing unit (not shown) for providing an AC signal having a predetermined frequency to each loop coil of the electromagnetic induction coil sensor ). ≪ / RTI > When a pen incorporating a resonant circuit exists in the vicinity of the loop coil of the pen recognition panel 1148, the magnetic field transmitted from the loop coil generates a current based on mutual electromagnetic induction in the resonant circuit in the pen. Based on this current, an induction magnetic field is generated from the coils constituting the resonance circuit in the pen, and the pen recognition panel 1148 detects the induction magnetic field in the loop coil in the signal reception state, The touch position can be detected. The pen recognition panel 1148 may be provided at a lower portion of the display panel 1111 with a certain area, for example, an area capable of covering the display area of the display panel 1111. [

The microphone unit 1150 can receive a user voice or other sound and convert it into audio data. The control unit 1170 may use the user's voice input through the microphone unit 1150 in a call operation or convert the user's voice into audio data and store the audio data in the memory 1120.

In one embodiment, the microphone unit 1150 can receive audio data of the output content according to the parameters determined based on the metadata and the surrounding information. Accordingly, the microphone unit 1150 can be positioned next to the speaker unit 1160 to receive the output audio data. The control unit 1170 can generate a user profile based on the audio data input by the microphone unit 1150.

The image pickup section 1155 can capture a still image or a moving image under the control of the user. The image pickup unit 1155 may be implemented as a plurality of units such as a front camera and a rear camera.

When the image pickup unit 1155 and the microphone unit 1150 are provided, the control unit 1170 performs a control operation according to the user's voice input through the microphone unit 1150 or the user's motion recognized by the image pickup unit 1155 It is possible. For example, the device 1100 may operate in a motion control mode or a voice control mode. When operating in the motion control mode, the control unit 1170 activates the image pickup unit 1155 to pick up a user, track the motion change of the user, and perform a control operation corresponding thereto. For example, the control unit 1170 may output an image and an audio signal in accordance with the motion input of the user sensed by the image sensing unit 1155. [ When operating in the voice control mode, the control unit 1170 analyzes the user voice input through the microphone unit 1150 and operates in a voice recognition mode in which a control operation is performed according to the analyzed user voice.

The motion detection unit 1165 can detect movement of the main body of the device 1100. The device 1100 may be rotated or tilted in various directions. At this time, the motion detection unit 1165 can detect motion characteristics such as rotation direction, angle, and slope using at least one of various sensors such as a geomagnetism sensor, a gyro sensor, and an acceleration sensor. For example, the motion sensing unit 1165 may receive a user input by sensing motion of the main body of the device 1100, and may output an image and an audio signal according to the received input.

13 and 14, the embodiment may include a USB port to which a USB connector can be connected, various external input ports for connecting to various external terminals such as a headset, a mouse, and a LAN, , A DMB chip for receiving and processing a DMB (Digital Multimedia Broadcasting) signal, and various sensors.

The names of the components of the device 1100 described above may vary. In addition, the device 1100 according to the present disclosure may be configured to include at least one of the above-described components, some of which may be omitted or further include other additional components.

According to an embodiment, contents can be reproduced more effectively by processing content using not only characteristic information of the content but also information on the environment in which the content is to be reproduced.

The method according to one embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

Although the foregoing is directed to novel features of the present invention that are applicable to various embodiments, those skilled in the art will appreciate that the apparatus and method described above, without departing from the scope of the present invention, It will be understood that various deletions, substitutions, and alterations can be made in form and detail without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing description. All variations within the scope of the appended claims are embraced within the scope of the present invention.

Claims (22)

A method for reproducing a content,
Obtaining metadata including information on characteristics of the content;
Obtaining information on an environment in which the content is to be reproduced;
Determining parameters for reproducing the content based on the information about the environment in which the content is to be reproduced and the metadata; And
And reproducing the content based on the determined parameter. 2. The method of claim 1, wherein determining the parameter comprises:
Determining a parameter that can minimize a difference between information about a characteristic of the content included in the metadata and information about an environment in which the content is to be reproduced. 3. The method of claim 2,
Information on the environment in which the content is to be reproduced is generated in a syntax form or another form,
The step of determining the parameter
Converting information about a characteristic of the content included in the metadata into a systax form or another form. 3. The method of claim 2, wherein determining the parameter comprises:
Determining constraints based on information about the environment in which the content is to be played back;
And determining the parameter based on the constraint. 5. The method of claim 4,
Wherein the information about the characteristics of the content included in the meta data includes energy information for each reproduction period of the content,
Wherein determining the parameter comprises:
Determining the restriction condition based on information about an environment in which the content is to be reproduced; And
And determining the parameter based on the constraint and the energy information. The method according to claim 1,
Wherein the information about the characteristics of the content exists for each sound source included in the content,
Wherein the step of determining the parameter comprises determining the parameter for reproducing the content based on the characteristic information for each sound source. The method according to claim 1,
Wherein the characteristic information of the content includes energy information for each frequency band of the content,
Wherein the step of determining the parameter comprises determining the parameter for smoothing the energy of each frequency band of the content based on the energy information. The method according to claim 1,
Wherein the characteristic information of the content includes information on a frequency response characteristic of the content,
Wherein determining the parameter comprises determining the parameter for playing the content based on frequency response characteristic information of the metadata and information about the environment in which the content is to be played back. The method according to claim 1,
Wherein the characteristic information of the content included in the metadata includes configuration information for reproduction of the content for each device or reproduction function for which the content is to be reproduced,
Wherein determining the parameter comprises determining the parameter for playing the content based on the setting information. The method according to claim 1,
Receiving the reproduced content through an input device based on the determined parameter;
Updating information on an environment in which the content is to be played back based on the received content;
Further comprising re-determining the parameter based on the difference between the updated information and the characteristic information of the content included in the metadata. The method according to claim 1,
Wherein the characteristic information of the content included in the metadata includes energy information for each reproduction period of the content,
Wherein the step of determining the parameter includes a step of determining a parameter for controlling the power of the device on which the content is to be reproduced for each reproduction period of the content based on the energy information of the metadata,
And controlling the power source for each playback period of the content based on the determined parameter. The method of claim 1, wherein the information on the environment
Wherein the content includes at least one of specification and status information of a device to be reproduced, environmental information of a device on which the content is reproduced, and characteristics of a user. The method of claim 1,
At least one of information on the identification of the content, information on the intention of the producer that produced the content, information on the environment where the content is made, information on the listening condition of the content, and information on the result of analyzing the content / RTI > A device for playing back content,
The information processing method includes the steps of: obtaining metadata including information on a characteristic of the content; information about an environment in which the content is to be reproduced; information on an environment in which the content is to be reproduced; A control unit for determining a parameter; And
And a playback unit for playing back the content based on the determined parameter. 15. The apparatus of claim 14, wherein the control unit
And determines a parameter capable of minimizing a difference between information on a characteristic of the content included in the metadata and information on an environment in which the content is to be reproduced. 16. The method of claim 15,
Information on the environment in which the content is to be reproduced is generated in a syntax form or another form,
Wherein the control unit converts information on a characteristic of the content included in the meta data into a systax form or another form. 16. The apparatus of claim 15, wherein the control unit
Determine constraints based on information about the environment in which the content is to be played back, and determine the parameters based on the constraints. 15. The method of claim 14,
And a microphone for receiving the reproduced content through an input device based on the determined parameter,
Wherein the control unit updates the information on the environment in which the content is to be reproduced based on the received content, and based on the difference between the characteristic information of the content and the updated information contained in the meta data, Lt; / RTI > 15. The method of claim 14,
At least one of information on the identification of the content, information on the intention of the producer that produced the content, information on the environment where the content is made, information on the listening condition of the content, and information on the result of analyzing the content Device. 15. The method of claim 14,
Information on the environment in which the content is to be reproduced
Wherein the content includes at least one of a specification and status information of a device on which the content is to be reproduced, a peripheral environment information of the device on which the content is reproduced, and characteristics of the user. 15. The computer-readable recording medium according to any one of claims 1 to 14, wherein a program for implementing the method is recorded. 15. The computer program according to any one of claims 1 to 14, in combination with hardware for executing the method.

Images