KR20120104022A - Multimedia apparatus with sound effect function, sound effect apparatus and method for applying sound effect - Google Patents

Abstract

PURPOSE: A multimedia device, a sound effect generating device, and a sound effect generating method for generating sound effect are provided to prevent waste of an unnecessary resource and to prevent increase of power consumption. CONSTITUTION: A storing device(3100) stores a first filter function and a second filter function. The first filter function adds sound effect to an inputted audio signal. The second filter function adds sound effect to the inputted audio filter. A controlling unit(3200) operates the first filter function and the second filter function within the storing device. The first filter and the second filter mix respectively different sound effect with the inputted audio signal. The first filter and the second filter successively output the mixed audio signal. [Reference numerals] (3100) Storing device; (3200) Controlling unit

Description

Multimedia Apparatus with sound effect function, Sound effect apparatus and Method for applying sound effect}

The present invention relates to an audio signal decoding or reproducing apparatus.

An audio signal decoding or reproducing apparatus is a device for reproducing an input digital sound source or an analog sound source.

The decoding or reproducing apparatus has a surround concept applied to decode sound source content (eg, movies, music, music videos, etc.) to give a three-dimensional effect to a user when outputting sound. In particular, three-dimensional effects have been provided mainly for sound field effects of left and right channels.

In addition, various efforts have been made to output sound by adding various sound effects to a sound source. However, no effective device for providing various sound effects has been provided.

Accordingly, an object of the present invention is to provide a multimedia apparatus, an audio signal reproducing apparatus and a method capable of effectively providing various sound effects.

In order to achieve the above object, an embodiment of the present invention provides a multimedia playback device. The multimedia reproducing apparatus includes: storage means for storing a first filter function for adding a sound effect to an input audio signal and outputting the second filter function for adding and outputting a sound effect to the input audio signal; It may include a control unit for driving the first filter function and the second filter function in the storage means. The first filter and the second filter may mix different sound effects with the input audio signal and sequentially output the mixed sound effects by the controller.

The controller may operate the first filter and the second filter sequentially in time.

If the controller receives a sound effect different from that of the first filter during the operation of the first filter, the controller may start the operation of the second filter without terminating the operation of the first filter.

Even if the operation of the second filter is started, the controller may preferentially use the output of the first filter over the output of the second filter for a predetermined time.

When the controller receives a sound effect different from the sound effect of the first filter during the operation of the first filter, the first filter and the second filter may simultaneously drive for a predetermined time.

On the other hand, in order to achieve the above object, according to another embodiment of the present invention, a sound effect generating apparatus is provided. The sound effect generator includes: a first filter for adding a sound effect to an input audio signal and outputting the sound effect; And a second filter for adding a sound effect to the input audio signal and outputting the sound effect. The first filter and the second filter may sequentially mix different sound effects with the input audio signal. The first filter and the second filter may operate sequentially in time.

When a sound effect different from the sound effect of the first filter is requested during the operation of the first filter, the operation of the second filter may be started without completing the operation of the first filter. Even when the operation of the second filter is started, the output of the first filter may be used in preference to the output of the second filter for a predetermined time.

When a sound effect different from the sound effect of the first filter is requested during the operation of the first filter, the first filter and the second filter may be simultaneously driven for a predetermined time.

On the other hand, in order to achieve the above object, according to another embodiment of the present invention, a sound effect generating method is provided. The sound effect generating method includes driving a first filter for a first sound effect; If the second sound effect is requested, the method may include starting the operation of the second filter for the second sound effect while maintaining driving of the first filter for a predetermined time. Here, the output of the first filter may be used during the predetermined time. The method may further include stopping the operation of the first filter after the predetermined time.

The present invention provides a multimedia apparatus, an audio signal reproducing apparatus and a method which can effectively provide various sound effects. The present invention does not use a plurality of filters to provide various sound effects, thereby preventing unnecessary resources from being wasted and increasing power consumption.

In addition, according to the present invention, when switching from the driving sound effect to another sound effect, no noise is generated and no time delay problem is caused.

1 is a block diagram showing the configuration of an audio signal reproducing apparatus according to the present invention.
FIG. 2 is a block diagram illustrating the sound effect unit 115 of FIG. 1 according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating the filter shown in FIG. 2.
4 is a block diagram illustrating a sound effect unit 115 of FIG. 1 according to another embodiment of the present invention.
FIG. 5 is an exemplary view illustrating an exemplary operation of the sound effect unit illustrated in FIG. 4, and FIG. 6 is a flowchart illustrating an exemplary operation of the sound effect unit illustrated in FIG. 4.
FIG. 7 is a block diagram illustrating a sound effect unit 115 of FIG. 1 according to another embodiment of the present invention, and FIG. 8 is an exemplary view showing an exemplary operation of the sound effect unit shown in FIG. 7.
FIG. 9 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented as a controller of an image display apparatus, and FIG. 10 is a detailed block diagram of the controller.
FIG. 11 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented as a controller of the mobile terminal 1000.
FIG. 12 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented by a combination of a storage unit 3100 and a controller 3200 of the multimedia apparatus 3000.

It is to be noted that the technical terms used herein are merely used to describe particular embodiments, and are not intended to limit the present invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when the technical terms used herein are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, the term "comprising" or "comprising" or the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

In addition, the suffixes "module" and "unit" for the components used herein are given or mixed in consideration of ease of specification, and do not have distinct meanings or roles from each other.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an audio signal reproducing apparatus according to the present invention.

The illustrated audio signal reproducing apparatus (or audio signal decoding apparatus) 100 includes the audio decoder 101, the sound image positioning unit 103, the crosstalk reducing unit 105, the subband analyzing unit 107, and the phase adjusting unit 109. ), A gain adjusting unit 111, a subband combining unit 113, and a sound effect unit 115.

The audio decoder 101 may include various decoders to decode audio signals encoded in various ways.

For example, if the audio signal is an encoded audio signal, it may be decoded. Specifically, when the audio signal is an encoded audio signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder. In addition, when the audio signal is an encoded audio signal of the MPEG 4 Bit Sliced Arithmetic Coding (BSAC) standard according to the terrestrial digital multimedia broadcasting (DMB) scheme, it may be decoded by an MPEG 4 decoder. In addition, when the audio signal is a coded audio signal of the Advanced Audio Codec (AAC) standard of MPEG 2 according to the satellite DMB scheme or DVB-H, it may be decoded by the AAC decoder. In addition, when the audio signal is a coded audio signal of Dolby AC-3 standard, it can be decoded by the AC-3 decoder.

The sound image positioning unit 103 controls the sound image positioning on the input decoded audio signal. Here, sound image localization means a position of a sound image that is perceived sensoryly. For example, with respect to the stereo audio signals of the left and right channels, when the audio signals of the respective channels are the same, the sound image orientation may be the middle of the left speaker and the right speaker.

The method of locating a sound image is, for example, based on the phase difference (time difference) and the level ratio (sound pressure level ratio) of the audio signal reaching each listener's ear, the sound source at a specific position (specific direction) in the sound field space. You can feel it.

For such sound localization control, in the embodiment of the present invention, head-related transfer function filtering may be used on the input decoded audio signal.

HRTF is a transfer function between sound waves coming from an arbitrary source and sound waves reaching the ear tympanum, which is the ear of a model in the shape of an actual listener's ear or a person. This can be achieved by placing a microphone in and measuring the impulse response of the audio signal for a particular angle.

This head transfer function (HRTF) varies in value depending on the orientation and altitude of the sound source. It may also vary depending on physical characteristics such as the listener's head shape, head size or ear shape.

On the other hand, in the embodiment of the present invention, the head transfer function may be variable.

Head transfer function (HRTF) filtering may be performed on a mono channel basis. For example, the mono channel audio signal may be convolved with the impulse response to the first head transfer function and the impulse response to the second head transfer function, respectively, to generate a left audio signal and a right audio signal. Accordingly, sound image positioning can be performed.

On the other hand, when a multi-channel audio signal is input, the head transfer function (HRTF) filtering may be performed for each channel, and the left and right audio signals may be generated, respectively, and finally summed and output.

The cross-talk canceler 105 performs signal processing for reducing the cross talk of the audio image controlled audio signal. That is, in order to prevent the transmitted sound reaching the left ear from reaching the right ear and not recognizing the direction of the virtual sound source (cross talk phenomenon), an additional audio signal for erasing it may be transmitted. .

For example, the crosstalk reduction unit 105 may add a plurality of reverberation components having a delay time to the difference signal between the audio signal of the right channel and the audio signal of the left channel.

Accordingly, the left audio signal and the right audio signal that have passed through the crosstalk reduction unit 105 are heard only by the corresponding ears (left ear, right ear) of the listener.

Meanwhile, signal processing for crosstalk reduction may be performed based on the time domain, but is not limited thereto and may be performed based on the frequency domain.

On the other hand, the crosstalk reduction unit 105 may be selectively provided. That is, it is also possible to directly input the left audio signal and the right audio signal output from the image positioning unit 103 to the sub band analyzer 107.

The subband analysis unit 107 performs subband analysis filtering on the audio-position controlled audio signal. That is, a subband analysis filter bank is provided to convert the audio-position-determined audio signal into a frequency signal. The subbands of the audio signal filtered by the subband analyzer 107 may be 32 subbands or 64 subbands.

As described above, the audio signal divided according to frequency bands may be performed by the phase adjusting unit 109 and the gain adjusting unit 111 according to the frequency band or the frequency band group.

A frequency dependent phase controller 109 adjusts a phase for each frequency band separated for each band. This phase adjustment may be performed based on the detected depth information or the amount of change in depth. It is preferable to increase the phase as the detected depth is larger or the amount of change in the depth is larger. It is possible to increase to the upper limit when the phase increases. On the other hand, if there is little depth or there is little change in depth, that is, less than a predetermined value, phase adjustment may not be performed.

For example, when the phase of an audio signal having a predetermined frequency is increased by 1800 degrees, the audio signal may be seen to be further protruded toward the user.

The phase adjustment method may be performed in various ways. For example, you can change the sign between channels by dividing the band or band only for a certain frequency range, change the sign between channels by grouping them in a specific frequency range, or adjust the phase between channels independently in each frequency band, The phases between channels can be adjusted by dividing bands or bands only for a specific frequency range, or the phases between channels can be controlled by grouping them for a specific frequency range.

The gain adjusting unit 111 adjusts gain for each frequency band separated for each band.

The gain adjustment method may be performed in various ways. For example, the gain can be adjusted independently in all frequency bands, the gain can be adjusted by dividing the band or band only for a specific frequency range, or the gain can be adjusted for each group by grouping the band for a specific frequency range.

For example, the gain may be adjusted when the frequency band is 1000 Hz to 4000 Hz, and the gain may not be adjusted in other frequency bands.

The subband synthesis unit 113 performs subband synthesis filtering on the audio signal whose phase or gain is adjusted for each frequency band. That is, a subband synthesis filter bank is provided to synthesize subbands divided into four subbands, 64 subbands, or the like. Accordingly, an audio signal in which sound image positioning, phase adjustment, gain adjustment, and the like is finally performed is output.

On the other hand, although not shown in the figure, it is also possible to provide a channel separator between the audio decoder 101 and the sound image positioning section 103.

The channel separator divides an input audio signal for each channel. For example, the audio signal may be separated into a rear channel and a front channel. The rear channel may be an audio signal output from the rear, and the front channel may be an audio signal output from the front. In addition, it can be divided into 5.1 channels, or in the case of stereo, it can be divided into the left channel and the right channel.

Meanwhile, the sound effect unit 115 adds various sound effects to the audio signal on which the sound image positioning, phase adjustment, gain adjustment, and the like are performed. When the sound is sounded in a space, the sound effect generally refers to the clarity of the sound, the state of separation, reverberation, reverberation, and the like. This sound effect can give the sound a ringing effect, for example, in a theater, concert hall, study, or cave. In addition, the sound effect may perform an equalizer function in addition to allowing the sound to ring in any space. The equalizer function is to amplify or reduce the sound of a specific frequency band. For example, when the audio signal is about news, it can amplify the human voice frequency band and reduce other portions. Alternatively, when the audio signal relates to a movie, the sound of the low frequency band can be amplified so that the user feels grand. In addition, when the audio signal is music, it may be to amplify a specific frequency band according to various genres such as pop, classic, rock, and the like. In order to generate the sound effect as described above, various filters may be used as shown in FIG. 2.

Meanwhile, the audio signal reproducing apparatus 100 illustrated in FIG. 1 may be implemented as software programs or codes, not hardware. The image reproducing apparatus 1000 of FIG. 9 and the mobile terminal 2000 of FIG. 11 will be described later. It may be executed by each control unit of the.

FIG. 2 is a block diagram illustrating the sound effect unit 115 of FIG. 1 according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating the filter shown in FIG. 2.

As can be seen with reference to Figure 2, the sound effect unit 115 includes a plurality of filters and multiplexers to give a variety of sound effects. Each of these filters produces a different sound effect (or sound field). For example, the sound effect first filter may be configured for the echo effect in the concert hall, and the sound effect second filter may be configured for the echo effect in the cave. In addition, each filter is configured to have an echo effect in any of soundproof rooms, bathrooms, living rooms, stone rooms, auditoriums, stadiums, hangars, carpeted corridors, corridors, forests, cities, mountains, quarry, plains, and parking lots. Can be.

As shown in FIG. 3, the filter may include a primary reflection generator, a secondary reflection generator, and an echo generator. The primary reflection sound generator 32 has the effect of listening to the sound reaching the reflection of the wall when the sound source data is reproduced, and exhibits different sound field effects according to predetermined functions and coefficient values for filtering the audio signal.

The primary reflection sound generator filters the audio signal using a predetermined function and a coefficient value, and then mixes the audio signal with a second input audio signal and outputs the mixed audio signal.

The secondary reflection sound generator generates a sound source that sounds as if the sound is reflected by various obstacles and the attenuated effect is fed back to the listener.

The secondary reflection sound generator filters a portion of the audio signal output from the primary reflection sound generator using a predetermined function and a coefficient value, and then feeds it back to mix with another portion of the audio signal.

The echo generator randomly mixes the reverberation components by using a predetermined function and coefficients of the audio signal output through the primary reflection generator and the secondary reflection generator to generate an echo as if the sound source is reproduced in a real place.

The filter including the above-described primary reflection generator, secondary reflection generator, and echo generator may be implemented as a software program or codes. In addition, the sound effect unit 115 including the filter and the multiplex may be implemented as a software program or codes.

On the other hand, as described above, although a plurality of filters are included, in general, sound effects are not output at the same time, but only one at a time, so in FIG. 2, only one of the outputs from the plurality of filters using a multiplexer is used. Finally output

As described above, in order to provide various sound effects, a plurality of filters must be used, but using a plurality of filters in this way uses unnecessary resources. This will increase power consumption.

Meanwhile, unlike FIG. 2, there is a method of selecting and driving one of a plurality of filters using a switch, but there is a disadvantage in that noise is caused by the switch. Another disadvantage is that a delay occurs by the switch when switching the sound effect to another.

4 is a block diagram illustrating a sound effect unit 115 of FIG. 1 according to another embodiment of the present invention.

As shown in FIG. 4, the sound effect unit 115 may include two sound effect filters, unlike in FIG. 2. The sound effect unit 115 including the filter may be implemented as a software program or codes.

The sound effect unit 115 illustrated in FIG. 4 is proposed to solve a time delay problem and a resource problem resulting from the configuration of the sound effect unit illustrated in FIG. 2.

As shown in FIG. 3, each sound effect filter has the same structure. As described above, only one filter is used at a time among several sound effect filters, and the sound effect unit 115 shown in FIG. 4 is shown. ) Can only use at least two sound effect filters.

The at least two sound effect filters may be used sequentially. For example, the sound effect second filter may be in a standby state when the sound effect first filter is in use. More specifically, when the sound effect first filter is operating to generate an echo effect in the cave, the sound effect second filter may be waiting to generate an echo effect in the concert hall. And, if the echo effect in the concert hall is commanded to be used, the operation of the sound effect second filter can be started. Once the operation of the sound effect second filter is initiated, the sound effect first filter may be waiting to generate another echo effect.

As described in the above example, by using two sound effect filters sequentially, various sound effects can be produced. More detailed operation will be described with reference to FIG. 5.

FIG. 5 is an exemplary view illustrating an exemplary operation of the sound effect unit illustrated in FIG. 4, and FIG. 6 is a flowchart illustrating an exemplary operation of the sound effect unit illustrated in FIG. 4.

As can be seen with reference to Figure 5, the two sound effect filters are operated sequentially, but for a period of time both the first filter and the second filter to operate for stabilization, using only the output of one filter Can be.

For example, in FIG. 5, when the sound effect first filter is used, and the command for using the second filter is received, the operation of the first filter is maintained for a predetermined time, for example, for the time t1 shown. Is initiated. The operation of the second filter is started for the predetermined time, for example, t1 time, but the output of the second filter may not be used. Even when the operation of the second filter is started as described above, the output of the second filter is not used for the time t1 because the output of the second filter is not stabilized as soon as the operation of the second filter is started. .

In addition, in order for the second filter to generate a predetermined sound effect, a predetermined filter coefficient is required. Therefore, when the start of the operation of the second filter is requested while the first filter is in operation, the second filter acquires a coefficient for the predetermined sound effect during the t1 time and starts operation. When the stabilization is completed after the t1 time, the second filter starts operation, and the first filter stops operation.

On the other hand, when a request for another sound effect is received while the second filter is in operation, the first filter obtains filter coefficients for the other sound effect for t2 time and prepares to start operation of the first filter. The second filter maintains output until the first filter stabilizes for the t2 time. When the t2 time has stabilized, the second filter stops operating, and the first filter operates to output an audio signal from the first filter.

Referring to FIG. 6 again, after driving the first filter for the first sound effect (S110), when receiving a request for the second sound effect, the driving of the first filter is maintained for a predetermined time. The operation of the second filter is started for the second sound effect (S120). Then, the output of the first filter is used for the predetermined time, and the output of the second filter is used after the predetermined time (S130).

The operations described so far may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware or a combination thereof.

FIG. 7 is a block diagram illustrating a sound effect unit 115 of FIG. 1 according to another embodiment of the present invention, and FIG. 8 is an exemplary view showing an exemplary operation of the sound effect unit shown in FIG. 7.

As can be seen with reference to FIG. 7, according to another embodiment of the present invention, the sound effect unit 115 may include a sound effect first filter, a sound effect second filter, and a multiplexer. .

The first filter may use filter coefficients 1, 3 and 5, for example, and the second filter may use filter coefficients 2 and 4, for example. The filter coefficients 1,2,3,4,5 are coefficients for different sound effects. The filter coefficients 1 to 5 are input to respective filters when receiving each sound effect request.

The output of the first filter and the second filter is selected only one stable output using the multiplexer.

For example, as shown in FIG. 8, when a request for a first sound effect is received, 1 is input to the first filter as the filter coefficient, and the first filter has a first sound effect according to filter coefficient 1. Output the applied audio signal 1. Subsequently, when a request for a second sound effect is received, 2 is input as the filter coefficient to the second filter, and the second filter outputs the audio signal 2 to which the second sound effect is applied according to filter coefficient 2.

When the audio signal 1 and the audio signal 2 are output in this way, the multiplexer can select and output only the stable signal.

Up to now, the configuration and operation of the sound effect unit 115 has been described according to various embodiments of the present invention. However, the scope of protection of the present invention is not limited to such an operation, and it should be interpreted that the operation that can be easily derived by those skilled in the art by the illustrated configuration is included in the scope of protection of the present invention.

In addition, although the audio signal reproducing apparatus has been described so far, the audio signal reproducing apparatus may be implemented as a component of the image display apparatus shown in FIG. 9. This will be described with reference to FIG. 9.

FIG. 9 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented as a controller of an image display apparatus, and FIG. 10 is a detailed block diagram of the controller.

Referring to FIG. 9, the image display apparatus 1000 according to an exemplary embodiment of the present invention may include a tuner 1100, a demodulator 12000, an external device interface unit 1300, a network interface unit 1350, and a storage unit ( 1400, a user input interface 1500, a controller 1700, a display 1800, an audio output unit 1850, and a 3D viewing apparatus 1950.

The tuner 1100 selects an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels from among RF (Radio Frequency) broadcast signals received through an antenna. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal.

For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the analog broadcast signal is converted into an analog baseband video or audio signal (CVBS / SIF). That is, the tuner 1100 may process a digital broadcast signal or an analog broadcast signal. The analog baseband image or audio signal CVBS / SIF output from the tuner 1100 may be directly input to the controller 1700.

In addition, the tuner 1100 may receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of multiple carriers according to a digital video broadcasting (DVB) scheme.

Meanwhile, in the present invention, the tuner 1100 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna and converts them into intermediate frequency signals or baseband video or audio signals. I can convert it.

The demodulator 12000 receives a digital IF signal DIF converted by the tuner 1100 and performs a demodulation operation.

For example, when the digital IF signal output from the tuner 1100 is an ATSC method, the demodulator 12000 performs 7-VSB (7-Vestigal Side Band) demodulation. In addition, the demodulator 12000 may perform channel decoding. To this end, the demodulator 12000 includes a trellis decoder, a de-interleaver, a reed solomon decoder, and the like. Soloman decryption can be performed.

For example, when the digital IF signal output from the tuner 1100 is a DVB scheme, the demodulator 12000 performs coded orthogonal frequency division modulation (COFDMA) demodulation. In addition, the demodulator 12000 may perform channel decoding. To this end, the demodulator 12000 may include a convolution decoder, a deinterleaver, a reed-soloman decoder, and the like to perform convolutional decoding, deinterleaving, and reed soloman decoding.

The demodulator 12000 may output a stream signal TS after performing demodulation and channel decoding. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. For example, the stream signal may be an MPEG-2 Transport Stream (TS) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, and the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

On the other hand, the demodulator 12000 described above can be provided separately according to the ATSC system and the DVB system. That is, it can be provided as an ATSC demodulation unit and a DVB demodulation unit.

The stream signal output from the demodulator 12000 may be input to the controller 1700.

After performing demultiplexing, image / audio signal processing, and the like, the controller 1700 outputs an image to the display 1800 and outputs an audio to the audio output unit 1850.

The external device interface unit 1300 may transmit or receive data with the connected external device. To this end, the external device interface unit 1300 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 1300 may be connected to an external device such as a digital versatile disk (DVD), a Blu-ray, a game device, a camera, a camcorder, a computer (laptop), or the like by wire / wireless. The external device interface unit 1300 transmits an image, audio, or data signal input from the outside to the controller 1700 of the image display apparatus 1000 through the connected external device. In addition, the controller 1700 may output an image, audio, or data signal processed by the controller 1700 to a connected external device. To this end, the external device interface unit 1300 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The A / V input / output unit includes a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), and a DVI so that video and audio signals of an external device can be input to the video display device 1000. (Digital Visual Interface) terminal, HDMI (High Definition Multimedia Interface) terminal, RGB terminal, D-SUB terminal and the like.

The wireless communication unit can perform short-range wireless communication with other electronic devices. The image display apparatus 1000 may communicate with Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and Digital Living Network Alliance (DLNA). Depending on the specification, it can be networked with other electronic devices.

In addition, the external device interface unit 1300 may be connected through at least one of the various set-top boxes and the various terminals described above to perform input / output operations with the set-top box.

Meanwhile, the external device interface unit 1300 may transmit / receive data with the 3D viewing device 1950.

The network interface unit 1350 provides an interface for connecting the image display apparatus 1000 to a wired / wireless network including an internet network. The network interface unit 1350 may include an Ethernet terminal for connection with a wired network, and for connection with a wireless network, a WLAN (Wi-Fi) or a Wibro (Wireless). Broadband, Wimax (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA) communication standards, and the like may be used.

The network interface unit 1350 may receive content or data provided by the Internet or a content provider or a network operator through a network. That is, it can receive contents and related information such as movies, advertisements, games, VOD, broadcasting signals, etc., provided from the Internet, a content provider, and the like through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received. It may also transmit data to the Internet or content provider or network operator.

In addition, the network interface unit 1350 may be connected to, for example, an IP (Internet Protocol) TV, and receive a video, audio, or data signal processed by an IPTV set-top box to enable bidirectional communication. The signal processed by the controller 1700 may be transmitted to the set-top box for IPTV.

Meanwhile, the above-described IPTV may mean ADSL-TV, VDSL-TV, FTTH-TV, etc. according to the type of transmission network, and include TV over DSL, Video over DSL, TV overIP (TVIP), and Broadband TV ( BTV) and the like. In addition, IPTV may also mean an Internet TV capable of accessing the Internet, or a full browsing TV.

The storage unit 1400 may store a program for processing and controlling each signal in the controller 1700, or may store a signal-processed video, audio, or data signal.

In addition, the storage unit 1400 may perform a function for temporarily storing an image, audio, or data signal input to the external device interface unit 1300. In addition, the storage unit 1400 may store information about a predetermined broadcast channel through a channel storage function such as a channel map.

The storage unit 1400 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg, SD or XD memory), It may include at least one type of storage medium such as RAM, ROM (EEPROM, etc.). The image display apparatus 1000 may reproduce and provide a file (video file, still image file, music file, document file, etc.) stored in the storage unit 1400 to the user.

9 illustrates an embodiment in which the storage unit 1400 is provided separately from the control unit 1700, but the scope of the present invention is not limited thereto. The storage 1400 may be included in the controller 1700.

The user input interface unit 1500 transmits a signal input by the user to the controller 1700 or transmits a signal from the controller 1700 to the user.

For example, the user input interface unit 1500 may power on / off, select a channel, and display a screen from the remote controller 2000 according to various communication methods such as an RF (Radio Frequency) communication method and an infrared (IR) communication method. A user input signal such as a setting may be received, or a signal from the controller 1700 may be transmitted to the remote controller 2000.

Also, for example, the user input interface unit 1500 may transmit a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, and a set value to the controller 1700.

Also, for example, the user input interface unit 1500 may transmit a user input signal input from a sensing unit (not shown) that senses a user's gesture to the controller 1700 or may transmit a signal from the controller 1700. The transmission may be transmitted to a sensing unit (not shown). Here, the sensing unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, and the like.

The control unit 1700 demultiplexes the input stream or processes the demultiplexed signals through the tuner 1100, the demodulator 12000, or the external device interface unit 1300, and outputs a video or audio signal. You can create and output.

The image signal processed by the controller 1700 may be input to the display 1800 and displayed as an image corresponding to the image signal. In addition, the image signal processed by the controller 1700 may be input to the external output device through the external device interface unit 1300.

The audio signal processed by the controller 1700 may be sound output to the audio output unit 1850. In addition, the audio signal processed by the controller 1700 may be input to the external output device through the external device interface 1300.

As can be seen with reference to FIG. 10, the controller 1700 according to an embodiment of the present invention may include an audio processor 100 in which the audio signal reproducing apparatus 100 described with reference to FIG. 1 is implemented as a component. have. In addition, the controller 1700 may include a demultiplexer 210, an image processor 220, an OSD generator 240, a mixer 245, a frame rate converter 250, and a formatter 260. have. In addition, it may further include a data processor (not shown).

The demultiplexer 210 demultiplexes an input stream. For example, when an MPEG-2 TS is input, it may be demultiplexed and separated into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer 210 may be a stream signal output from the tuner 1100, the demodulator 12000, or the external device interface unit 1300.

The image processor 220 may perform image processing of the demultiplexed image signal. To this end, the image processor 220 may include an image decoder 225 and a scaler 235.

The image decoder 225 decodes the demultiplexed video signal, and the scaler 235 performs scaling to output the resolution of the decoded video signal on the display 1800.

The video decoder 225 may include decoders of various standards. For example, the image decoder 225 may include at least one of an MPEG-2 decoder, an H.264 decoder, an MPEC-C decoder (MPEC-C part 3), an MVC decoder, and an FTV decoder.

In addition, the controller 1700 may control overall operations of the image display apparatus 1000. For example, the controller 1700 may control the tuner 1100 so as to tune to an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 1700 may control the image display apparatus 1000 by a user command or an internal program input through the user input interface 1500.

For example, the controller 1700 controls the tuner 1100 such that a signal of a selected channel is input according to a predetermined channel selection command received through the user input interface 1500. Then, video, audio, or data signals of the selected channel are processed. The controller 1700 may output the selected channel information and the like through the display 1800 or the audio output unit 1850 together with the processed image or audio signal.

As another example, the controller 1700 may, for example, receive an external device image playback command received through the user input interface unit 1500, from an external device input through the external device interface unit 1300, for example, a camera or a camcorder. The video signal or the audio signal may be output through the display 1800 or the audio output unit 1850.

The controller 1700 may control the display 1800 to display an image. For example, a broadcast image input through the tuner 1100, an external input image input through the external device interface unit 1300, or an image input through the network interface unit 1350, or an image stored in the storage unit 1400. May be controlled to be displayed on the display 1800.

In this case, the image displayed on the display 1800 may be a still image or a video, and may be a 2D image or a 3D image.

Meanwhile, the controller 1700 may generate and display a 3D object with respect to a predetermined object in the image displayed on the display 1800. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

Such a 3D object may be processed to have a depth different from that of the image displayed on the display 1800. Preferably, the 3D object may be processed to protrude compared to an image displayed on the display 1800.

The controller 1700 recognizes a user's position based on an image photographed by a photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 1000 may be determined. In addition, the x-axis coordinates and the y-axis coordinates in the display 1800 corresponding to the user position may be determined.

On the other hand, although not shown in the figure, it may be further provided with a channel browsing processing unit for generating a thumbnail image corresponding to the channel signal or the external input signal. The channel browsing processor may receive a stream signal TS output from the demodulator 12000 or a stream signal output from the external device interface unit 1300, and extract a video from the input stream signal to generate a thumbnail image. Can be. The generated thumbnail image may be input as it is or encoded to the controller 1700. In addition, the generated thumbnail image may be encoded in a stream form and input to the controller 1700. The controller 1700 may display a thumbnail list including a plurality of thumbnail images on the display 1800 by using the input thumbnail image. In this case, the thumbnail list may be displayed in a simple viewing manner displayed in a partial region while a predetermined image is displayed on the display 1800 or in an entire viewing manner displayed in most regions of the display 1800. The thumbnail images in the thumbnail list may be updated sequentially.

The display 1800 converts an image signal, a data signal, an OSD signal, a control signal, or an image signal, a data signal, a control signal, etc. received from the external device interface unit 1300 processed by the controller 1700 to convert a driving signal. Create

The display 1800 may be a PDP, an LCD, an OLED, a flexible display, and the like, and in particular, it is preferable that a 3D display is possible according to an embodiment of the present invention.

For viewing the 3D image, the display 1800 may be divided into an additional display method and a single display method.

The independent display method may implement a 3D image by the display 1800 alone without additional display, for example, glasses, and the like, for example, a lenticular method, a parallax barrier, or the like. Various methods can be applied.

Meanwhile, the additional display method may implement a 3D image by using an additional display in addition to the display 1800. For example, various methods such as a head mounted display (HMD) type and glasses type may be applied. In addition, the spectacles type can be further divided into a passive scheme such as a polarized glasses type and an active scheme such as a shutter glass type. On the other hand, the head mounted display type can be divided into passive and active methods.

In the embodiment of the present invention, the 3D additional display 1950 focuses on the 3D glasses for stereoscopic image viewing. The 3D glass 1950 may include a passive polarized glass or an active shutter glass, and is described in the concept of including the aforementioned head mount type.

The display 1800 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 1850 receives a signal processed by the controller 1700, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs a voice signal. The voice output unit 1850 may be implemented with various types of speakers.

As described above, a sensing unit (not shown) including at least one of a touch sensor, a voice sensor, a position sensor, and a motion sensor may be further included in the image display apparatus 1000 to detect a gesture of a user. have. The signal detected by the sensing unit (not shown) is transmitted to the controller 1700 through the user input interface 1500.

The controller 1700 may detect a gesture of a user by combining or combining an image photographed by a photographing unit or a sensed signal from a sensing unit (not shown).

The remote control apparatus 2000 transmits the user input to the user input interface unit 1500. To this end, the remote control apparatus 2000 may use Bluetooth, RF (Radio Frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee (ZigBee) method and the like. In addition, the remote control apparatus 2000 may receive an image, an audio or a data signal output from the user input interface unit 1500, and display or output the audio from the remote control apparatus 2000.

The video display device 1000 described above is a fixed type of ATSC (7-VSB) digital broadcasting, DVB-T (COFDM) digital broadcasting, ISDB-T (BST-OFDM) digital broadcasting, and the like. It may be a digital broadcast receiver capable of receiving at least one. In addition, as a mobile type, digital broadcasting of terrestrial DMB system, digital broadcasting of satellite DMB system, digital broadcasting of ATSC-M / H system, digital broadcasting of DVB-H system (COFDM system) and media flow link only system It may be a digital broadcast receiver capable of receiving at least one of digital broadcasts. It may also be a digital broadcast receiver for cable, satellite communications, or IPTV.

On the other hand, the video display device described in the present specification is a TV receiver, a mobile phone, a smart phone (notebook computer), a digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), etc. May be included.

Meanwhile, a block diagram of the image display apparatus 1000 shown in FIG. 9 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 1000 that is actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

Up to now, the audio signal reproducing apparatus illustrated in FIG. 1 has been described as being implemented as an audio processing unit of the controller 1700 in the image display apparatus 1000.

However, the present invention is not limited thereto, and the audio signal reproducing apparatus illustrated in FIG. 1 may be implemented as a component of a mobile device such as a mobile phone, a smart phone, and a tablet.

FIG. 11 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented as a controller of the mobile terminal 1000.

The mobile terminal 2100 may include a wireless communication unit 2110, an audio / video input unit 2120, a user input unit 2130, a sensing unit 2140, an output unit 2150, a memory 2160, and an interface. The unit 2170, a controller 2180, and a power supply unit 2190 may be included. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The controller 2180 may include an audio processor 100 implemented as a component of the audio signal reproducing apparatus 100 described with reference to FIG. 1.

The wireless communication unit 2110 may include one or more modules that enable wireless communication between the mobile terminal 2100 and the wireless communication system or between the mobile terminal 2100 and a network in which the mobile terminal 2100 is located. For example, the wireless communication unit 2110 may include a broadcast receiving module 2111, a mobile communication module 2112, a wireless internet module 2113, a short range communication module 2114, a location information module 2115, and the like. .

The broadcast receiving module 2111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel. The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 2112. The broadcast signal and / or broadcast related information received through the broadcast receiving module 2111 may be stored in the memory 2160.

The mobile communication module 2112 transmits and receives a wireless signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless internet module 2113 refers to a module for wireless internet access and may be embedded or external to the mobile terminal 2100. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 2114 refers to a module for short range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The location information module 2115 is a module for obtaining a location of a mobile terminal, and a representative example thereof is a GPS (Global Position System) module.

Referring to FIG. 11, the A / V input unit 2120 is for inputting an audio signal or a video signal, and may include a camera 2121 and a microphone 2122. The camera 2121 processes an image frame such as a still image or a video obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display portion 2151.

The image frame processed by the camera 2121 may be stored in the memory 2160 or transmitted to the outside through the wireless communication unit 2110. Two or more cameras 2121 may be provided according to a usage environment.

The microphone 2122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 2112 and output in the call mode. The microphone 2122 may be implemented with various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 2130 generates input data for the user to control the operation of the terminal. The user input unit 2130 may include a key pad dome switch, a touch pad (constant voltage / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 2140 detects a current state of the mobile terminal 2100 such as an open / closed state of the mobile terminal 2100, a position of the mobile terminal 2100, a presence or absence of a user contact, a bearing of the mobile terminal, an acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the mobile terminal 2100. For example, if the mobile terminal 2100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. Also, whether the power supply unit 2190 is supplied with power or whether the interface unit 2170 is coupled to an external device may be sensed. The sensing unit 2140 may include a proximity sensor 2141.

The output unit 2150 is used to generate an output related to visual, auditory, or tactile senses, and may include a display unit 2151, an audio output module 2152, an alarm unit 2153, and a haptic module 2154. have.

The display unit 2151 displays (outputs) information processed by the mobile terminal 2100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 2100 is in a video call mode or a photographing mode, the mobile terminal 2100 displays a photographed and / or received image, a UI, or a GUI.

The display unit 2151 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). display, a 3D display, or an e-ink display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display portion 2151 may also be configured as a light transmissive structure. With this structure, the user can see the object located behind the terminal body through the area occupied by the display portion 2151 of the terminal body.

According to an implementation form of the mobile terminal 2100, two or more display units 2151 may exist. For example, the plurality of display units may be spaced apart or integrally disposed on one surface of the mobile terminal 2100, or may be disposed on different surfaces.

When the display unit 2151 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 2151 may be used in addition to an output device. Can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in pressure applied to a specific portion of the display portion 2151 or capacitance generated at a specific portion of the display portion 2151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 2180. As a result, the controller 2180 may determine which area of the display unit 2151 is touched.

Referring to FIG. 11, a proximity sensor 2141 may be disposed in an inner region of the mobile terminal covered by the touch screen or near the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

The sound output module 2152 may output audio data received from the wireless communication unit 2110 or stored in the memory 2160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 2152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed by the mobile terminal 2100. The sound output module 2152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 2153 outputs a signal for notifying occurrence of an event of the mobile terminal 2100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 2153 may output a signal for notifying an occurrence of an event by vibration, in addition to a video signal or an audio signal. The video signal or the audio signal may also be output through the display unit 2151 or the audio output module 2152, and they may be classified as part of the alarm unit 2153.

The haptic module 2154 generates various tactile effects that a user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 2154. The intensity and pattern of vibration generated by the haptic module 2154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 2154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through the jetting or suction port, grazing to the skin surface, contact of the electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 2154 may not only deliver the haptic effect through direct contact, but also may implement the user to feel the haptic effect through a muscle sense such as a finger or an arm. Two or more haptic modules 2154 may be provided according to a configuration aspect of the mobile terminal 2100.

The memory 2160 may store a program for the operation of the controller 2180, and may temporarily store input / output data (eg, a phone book, a message, a still image, a video, etc.). The memory 2160 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

The memory 2160 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), RAM random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic It may include a storage medium of at least one type of disk, optical disk. The mobile terminal 2100 may operate in association with a web storage that performs a storage function of the memory 2160 on the Internet.

The interface unit 2170 serves as a path with all external devices connected to the mobile terminal 2100. The interface unit 2170 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 2100, or transmits data inside the mobile terminal 2100 to an external device. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, The video input / output (I / O) port, the earphone port, and the like may be included in the interface unit 2170.

The identification module is a chip that stores various types of information for authenticating the use authority of the mobile terminal 2100. The identification module includes a user identify module (UIM), a subscriber identify module (SIM), and a universal user authentication module (SIM). universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Therefore, the identification device may be connected to the terminal 2100 through a port.

When the mobile terminal 2100 is connected to an external cradle, the interface unit is a passage through which power from the cradle is supplied to the mobile terminal 2100, or various command signals input from the cradle by a user are moved. It may be a passage that is delivered to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like.

The power supply unit 2190 receives external power and internal power under the control of the controller 2180 to supply power for operation of each component.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, May be modified, modified, or improved.

FIG. 12 is a block diagram illustrating that the audio signal reproducing apparatus illustrated in FIG. 1 is implemented by a combination of a storage unit 3100 and a controller 3200 of the multimedia apparatus 3000.

As shown in FIG. 12, the multimedia apparatus 3000 includes a storage means 3100 and a controller 3200.

The storage means 3100 stores software programs or codes in which the functions of the above-described audio signal reproducing apparatus are implemented. Implementing the functions of the audio signal reproducing apparatus in a software program or code is obvious to those skilled in the art and will not be described in detail.

The controller 3200 reads and executes the software program or code stored in the storage means 3100.

The operation of the storage means 3100 and the controller 3200 will be briefly described. The storage means 3200 may add a sound effect to an input audio signal and output the first filter function and the sound effect to the input audio signal. Add a second filter to store the output. The controller 3200 drives the first filter and the second filter function in the storage means 3100. For example, the controller 3200 may sequentially output the first filter and the second filter by mixing different sound effects with the input audio signal.

101: audio decoder 103: sound image top
105: crosstalk reduction unit 107: subband analysis unit
109: phase adjuster 111: gain adjuster
113: subband synthesis unit 115: sound effect unit
1000: video display device 2000: mobile terminal

Claims (11)

Storage means for storing a first filter function for adding a sound effect to an input audio signal and outputting the second filter function for adding and outputting a sound effect to the input audio signal;
A control unit for driving a first filter function and a second filter function in the storage means,
And the first filter and the second filter, by the controller, mix different sound effects with the input audio signal and sequentially output the mixed sound effects. The apparatus of claim 1, wherein the control unit
And the first filter and the second filter are sequentially operated in time. The apparatus of claim 1, wherein the control unit
And receiving a sound effect different from that of the first filter during the operation of the first filter, starting the operation of the second filter without terminating the operation of the first filter. The apparatus of claim 1, wherein the control unit
And the output of the first filter is given priority over the output of the second filter for a predetermined time even if the operation of the second filter is started. The method of claim 1,
And receiving a sound effect different from that of the first filter during the operation of the first filter, wherein the first filter and the second filter are simultaneously driven for a predetermined time. As a sound effect generator,
A first filter for adding a sound effect to the input audio signal and outputting the sound effect;
A second filter for adding a sound effect to the input audio signal and outputting the sound effect;
And the first filter and the second filter mix different sound effects with the input audio signal and sequentially output the mixed sound effects. The method of claim 6,
And the first filter and the second filter operate sequentially in time. The method of claim 6,
If a sound effect different from the sound effect of the first filter is requested during the operation of the first filter, the sound effect is generated without starting the operation of the first filter and starting the operation of the second filter. Device. The method of claim 8,
Even if the operation of the second filter is started, the output of the first filter over the output of the second filter for a predetermined time, characterized in that the sound effect generating device. The method of claim 6,
And receiving a sound effect different from the sound effect of the first filter during the operation of the first filter, the first filter and the second filter are driven simultaneously for a predetermined time. As a sound effect generation method,
Driving a first filter for a first sound effect;
When the second sound effect is requested, starting the operation of the second filter for the second sound effect while maintaining driving of the first filter for a predetermined time, wherein the first filter is Output is used,
And stopping the operation of the first filter after the predetermined time.

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