CN102893633B - Audio system equalization for portable media playback devices - Google Patents

Abstract

A method, an apparatus, a system, and logic encoded in a computer-readable storage medium to instruct a processing system to carry out the method. The method includes applying corrective filters directly in a portable media device to correct, e.g., equalize for the overall system comprising the portable media device and the playback system to which it is attached. Also a method of determining the corrective filters by playing back one or more calibration signals on the playback system while recording the resulting sound field on the portable media device.

Description

For the audio system equalization of portable media playback reproducer

The cross reference of related application

This application claims the U.S. Provisional Patent Application No.332 submitted on May 6th, 2010, the priority of 159, this U.S. Provisional Patent Application whole in being incorporated in this.

Technical field

The disclosure is usually directed to Audio Signal Processing, and particularly for the audio system equalization of attachment device for displaying audio.

Background technology

Attachment device for displaying audio has become the very common mode for playback media.The device of the audio frequency of playback stored digital (such as and mobile phone) be used to playback of music and audio-visual content.Trend for the growth of this device is, they and the transcriber for plays back audio miscellaneous and system are attached.Such as, her iPod may be attached to the household audio and video system comprising loud speaker, the TV with loud speaker or have the independently docking station (docking station) of loud speaker by user.Each in these is an example of the different playback system that identical mancarried device may be attached.

Namely the portable playback device being used in the audio frequency of stored digital can obtain more than 10 years, and the mancarried device of the audio frequency of the stored digital on playback dish or belt occurs decades, also still there are the needs of playback in a period of time from the equalization of the audio frequency of this device this device being connected to one group of possible playback system.This device commercially commercially available example as how long, the Diamond Multimedia in California manufactures portable playback device was introduced into for MP3 playback in 1998.The PJB-100Personal Jukebox manufactured by the HanGo Electronics Co. of Korea S, Ltd is admitted to be that first based on the device of hard drive and in 1999 by commercial introducing usually.Apple IPOD was introduced in calendar year 2001.Each in these devices comprises digital processing unit to decompress and to present the audio frequency of compression of stored digital.

Will be advantageous that, equalization filter is comprised at attachment device for displaying audio, this equalization filter is wanted directly in attachment device for displaying audio, to be applied to audio signal, to carry out equilibrium for whole system, the playback system listening to experience that this whole system comprises attachment device for displaying audio and is attached for improving.Can further advantageously, comprise at attachment device for displaying audio and organize equalization filter more, the each group of different playback system that can be applicable in the playback system that mancarried device may be attached, to carry out equilibrium for whole system, this whole system comprises the playback system of attachment device for displaying audio and attachment thereof.Also will be advantageous that, there is the method for end users operation, the method uses attachment device for displaying audio to determine the one group of equalization filter used together with specific playback system in attachment device for displaying audio, to carry out equilibrium for whole system, this whole system comprises the playback system of attachment device for displaying audio and attachment thereof.

Accompanying drawing explanation

Figure 1A and Figure 1B respectively shows the simplification view of the playback system that user, attachment device for displaying audio and attachment device for displaying audio can couple with it, and wherein Figure 1A shows the element in calibration mode, and Figure 1B shows the element in playback mode.

Fig. 2 shows the simplified block diagram of an example embodiment of the attachment device for displaying audio comprising at least one feature of the present invention.

Fig. 3 shows the simplified block diagram of an example embodiment of the attachable playback system of attachment device for displaying audio, and is used in when so connecting and realizes in feature of the present invention.

Fig. 4 shows the simplified flow chart of the embodiment of calibration steps.

Fig. 5 shows the simplified flow chart of method of operation attachment device for displaying audio, for attachment device for displaying audio or the data of set storing the group being used for correcting filter on attachment device for displaying audio.

Fig. 6 shows a simplified block diagram arranged according to some embodiments of the present invention, and these embodiments comprise the remote storage of the data of the set of one or more group for correcting filter.

Embodiment

General introduction

Embodiments of the invention comprise method, equipment, system and encode so that instruction processing system realizes the logic of the method in computer-readable storage medium.The method comprises directly application correction filtering (such as, equalization filtering) in attachment device for displaying audio, at least for correcting for the whole system of the playback system comprising attachment device for displaying audio and attachment thereof, such as, carries out equilibrium.

Some embodiments comprise the method for operation attachment device for displaying audio.The method comprises: when attachment device for displaying audio and specific playback system couple, when the particular group of one or more correcting filter that attachment device for displaying audio application is selected from the set of one or more group of the correcting filter prestored or data for it, playing back audio signal in the attachment device for displaying audio in specific audition is arranged and the combination of specific playback system.In attachment device for displaying audio or prestore for attachment device for displaying audio correcting filter one or more group set or for its data.To arrange with corresponding audition for each group in one or more group of set and to associate with corresponding playback system.The particular group of one or more correcting filter is that the calibration process by comprising the steps is determined: on attachment device for displaying audio, record the sound field obtained by one or more predefined calibrating signal of playback on specific playback system, to utilize in attachment device for displaying audio microphone that is built-in or that be connected with attachment device for displaying audio this microphone at one or more listener positions place that specific audition is arranged time carry out this record, analyze the record of sound field to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system, and the data for the particular group for one or more correcting filter of specific playback system are stored in attachment device for displaying audio or for attachment device for displaying audio.

Some embodiments comprise the method for operation attachment device for displaying audio, it comprises: on attachment device for displaying audio, record the sound field obtained by one or more predefined calibrating signal of playback on specific playback system, utilizes one or more listener positions place that in attachment device for displaying audio, microphone that is built-in or that be connected with attachment device for displaying audio is arranged at specific audition at this microphone to carry out this record.The method comprises the record of analysis sound field to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system, and the data for the particular group for one or more correcting filter of specific playback system are stored in attachment device for displaying audio or for attachment device for displaying audio, make when attachment device for displaying audio and specific playback system couple, when the particular group of attachment device for displaying audio application one or more correcting filter determined, audio signal can the combination of attachment device for displaying audio in specific audition is arranged and specific playback system be play.

In some versions, in set of one or more group of the correcting filter prestored be stored in attachment device for displaying audio for the data of the particular group of one or more correcting filter or store for attachment device for displaying audio or the data for it, to arrange with corresponding audition for each group in one or more group of set and to associate with corresponding playback system.

Some embodiments comprise attachment device for displaying audio, and it comprises: playback subsystem, are configured to the audio signal selected by playback; And filtering subsystem, couple with playback subsystem and the playback be configured in audio signal by the group applied audio signal of one or more correcting filter.This attachment device for displaying audio also comprises: coupler, is configured to attachment device for displaying audio to couple with the coupler of mating be included in playback system; User interface, is configured to accept the input from user; And microphone or to the coupler of microphone.When filtering subsystem is configured to attachment device for displaying audio and specific playback system be coupled in specific audition is arranged, during via specific playback system playing back audio signal, apply the particular group of arranging one or more correcting filter associated with specific playback system and specific audition.The particular group of one or more correcting filter is set of one or more group of correcting filter or a part for the data for it of prestoring in attachment device for displaying audio or for attachment device for displaying audio, and in one or more group of set each group to arrange with corresponding audition and to associate with corresponding playback system.In some versions, attachment device for displaying audio is configured to: record the sound field obtained by one or more predefined calibrating signal of playback on specific playback system, utilize the microphone in attachment device for displaying audio or the microphone that is connected with attachment device for displaying audio this microphone at one or more listener positions place that specific audition is arranged time carry out this record.In more such schemes, attachment device for displaying audio is also configured to: analyze the record of sound field to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system; And the data for the particular group for one or more correcting filter of specific playback system are stored in attachment device for displaying audio or for attachment device for displaying audio.

Some embodiments comprise attachment device for displaying audio, and it comprises: for the parts of playing back audio signal; For the parts of filtering, be configured to the group applied audio signal of one or more correcting filter during the parts playing back audio signal for playback; For the parts that attachment device for displaying audio and playback system are coupled; For accepting the parts of the input from user; And for recording the parts of sound field.When parts for filtering are configured to attachment device for displaying audio and specific playback system be coupled by the parts for coupling in specific audition is arranged, during via specific playback system playing back audio signal, apply the particular group of arranging one or more correcting filter associated with specific playback system and specific audition.The particular group of one or more correcting filter is set of one or more group of correcting filter or a part for the data for it of prestoring in attachment device for displaying audio or for attachment device for displaying audio, and in one or more group of set each group to arrange with corresponding audition and to associate with corresponding playback system.Some schemes of attachment device for displaying audio also comprise: for analyzing the record of the sound field obtained by one or more predefined calibrating signal to determine the parts of the group of one or more correcting filter; And for the parts of the data that store the group for one or more correcting filter.The sound field that one or more listener positions place record that parts for recording are configured to arrange at specific audition is obtained by one or more predefined calibrating signal of playback on specific playback system, the parts for analyzing are configured to analyze the record of sound field to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system; And the parts for storing are configured to store the data for the particular group for one or more correcting filter of specific playback system in attachment device for displaying audio or for attachment device for displaying audio.

Specific embodiment can provide in these aspects, feature or advantage all, some or all do not provide.Specific embodiment can provide one or more other side, feature or advantage, one of them or more easily can to understand according to accompanying drawing in this application, specification and claim to those skilled in the art.

Some embodiments

Figure 1A and Figure 1B respectively shows the simplification view that user 141, attachment device for displaying audio 121 and attachment device for displaying audio can be coupled to its playback system 103.These are exemplary components of example embodiment of the present invention.Figure 1A shows the element in calibration mode, and Figure 1B shows the element in playback mode.

Attachment device for displaying audio 121 comprises coupler 127, and this coupler 127 is configured to attachment device for displaying audio to be couple to the coupling coupler be included in playback system (in this case, playback system 103).Attachment device for displaying audio 121 also comprises user interface 123, and this user interface 123 typically comprises display unit and user's input mechanism, and this user's input mechanism is configured to accept the order from user 141.Attachment device for displaying audio 121 also comprises playback subsystem 128 and filtering subsystem 129, this playback subsystem 128 is configured to the audio signal selected by playback, this filtering subsystem 129 be couple to playback subsystem and the playback be configured in audio signal by the group applied audio signal of one or more correcting filter.But not shown other element more shown in drawings in detail at this device comprises processor and storage subsystem in the drawings, and its element is included in playback subsystem 128 and filtering subsystem 129 in certain embodiments.Storage subsystem is configured to the data of one or more group stored for correcting filter, and by the market demand of particular group in filtering subsystem.

Playback system 103 comprises at least one loud speaker 105(and illustrated two in this example playback system) and comprise the playback module 107 of one or more audio frequency amplifier.

Figure 1B illustrates one aspect of the present invention, be included in via media apparatus 127 and playback system 103 separately on coupler 127 and 113 attachment device for displaying audio 121 is couple to playback system 103 time from the normal playback of the audio signal of the media file be stored in attachment device for displaying audio 121.User 141 is at specific listener positions place.The position of specific acoustic surrounding and listener and playback system limits audition and arranges.When attachment device for displaying audio 121 is by using filtering subsystem 129 to apply the particular group of arranging one or more correcting filter selected from set of one or more group of the correcting filter prestored for this specific playback system 103 and audition, playing back audio signal in the combination of attachment device for displaying audio and specific playback system.

As described in more detail below, in attachment device for displaying audio 121 and audition are arranged or arrange set (such as, there is the form of the data for filter) of one or more group prestoring correcting filter for attachment device for displaying audio 121 and audition.Each group of one or more correcting filter of this set to arrange with corresponding audition with corresponding playback system and associate.

Figure 1A illustrates another aspect of the present invention: for determining at least for arranging that (in this example, specific playback system 103) carries out the calibration process of the particular group of one or more balanced correcting filter for playback system and audition.Attachment device for displaying audio 121 comprises at least one built-in microphone 125, or can be connected with at least one microphone 125.Calibration process comprises: during one or more the listener positions place expected arranged at audition at microphone 125, and portable playback device 121 records the sound field obtained by least one predefined calibrating signal 111 of playback on specific playback system 103.Calibration process comprises: analyze the record of sound field to determine at least for carrying out the data of the particular group of one or more balanced correcting filter for specific playback system (and may also for acoustic surrounding), and in attachment device for displaying audio 121 or store the data of the particular group for one or more correcting filter for specific playback system (arranging with audition) for attachment device for displaying audio 121.Note, in certain embodiments, calibration process comprises carries out recording and being averaging result from some positions.Therefore the LisPos arranging the more than one expectation associated with audition can be there is.

By this way, in attachment device for displaying audio or prestore the data of set of the group for correcting filter for attachment device for displaying audio, each group of set to arrange with audition with corresponding playback system and associate.

Device

The present invention does not limit the type of attachment device for displaying audio.Minimum requirements is: the audio frequency can playing stored digital, has one or more microphone or can be connected to one or more microphone, and can be couple to any one in multiple playback system.The example of attachment device for displaying audio includes but not limited to: audio playback, such as Apple sandisk creative ZEN microsoft and other model from other manufacturer listed too much and not.Example also includes but not limited to: the cellular phone with audio storage and playback capability manufactured by each manufacturer of cellular phone in fact and so-called " intelligence " cellular phone, such as Apple IPHONE, Google NEXUS ONE and other " intelligence " cellular phones many listed too much and not.Have in these many can the voice data of not only playback stored digital but also playing back audiovisual content, such as can comprise the video file of the stored digital of the voice data of stored digital.

The present invention does not limit the type of playback system yet.Minimum requirements is, comprises one or more loud speaker, and can with portable playback device directly by with its docking (dock), by wired connection, be connected by wireless connections and via wired or wireless network.Minimum requirements also comprises: at least one signal that can receive the audio content at least comprised from portable playback device when being connected with portable playback device, and the audio frequency of at least this signal of playback.Minimum requirements also comprises: playback can be stored in one or more calibration file in storage subsystem in playback system, that can be loaded in playback system or send to playback system from external calibration signal source.The example of playback system includes but not limited to: be designed to comprise for specific one or more the so-called docking loud speaker (docking speaker) of connector of attachment device for displaying audio of a model.Such as, the popular shopping website Amazon.com of the U.S. lists 1953 on March 16th, 2010 for the search " iPod speaker " in kind of class of electronic devices, and lists 1295 for search " docking speaker ".The example of playback system also includes but not limited to: the household audio and video system comprising home theater system, some of them also comprise for specific one or more the connector of attachment device for displaying audio of model, and other comprises common input connector, such as gramophone (RCA) connector and for TRS(point, ring, cover (tip, ring, sleeve)) or TRRS(point, ring, ring, cover (tip, ring, ring, sleeve)) socket of connector.The example of playback system also includes but not limited to: comprise loud speaker or be connected to the television set of loud speaker.This television set generally includes the connector for external audio.Example also includes but not limited to: automobile audio system, its generally included in 2010 for specific one or more the connector of attachment device for displaying audio of model and/or common input connector, such as TRS(point, ring, cover) or TRRS(point, ring, ring, cover) socket of connector.

Embodiments of the invention are useful especially, because specific attachment device for displaying audio can be connected to more than one playback system.

Exemplary portable media device

Fig. 2 shows the simplified block diagram of an example embodiment of the attachment device for displaying audio comprising at least one feature of the present invention.To those skilled in the art can it is clear that be that all elements shown in Fig. 2 all can be included in all attachment device for displaying audio embodiments, and further, some attachment device for displaying audios can comprise unshowned extra element in Fig. 2.

The digital element of attachment device for displaying audio 121 comprise for simplicity only be depicted as single bus by bus subsystem 241() element that couples.These digital elements comprise at least one processor 243, storage subsystem 245, user interface 123, at least one digital interface 231 coupled with main connector 211, and for the digital information of such as digital audio signal and so on being converted to one or more digital to analog converter (DAC) for the simulated audio signal via one or more audio frequency amplifier playback in analog subsystem 225, and for simulated audio signal being converted to one or more analog to digital converter (ADC) of digitaling analoging signal.DAC with ADC is shown as module 233 together with their interface associated.DAC and ADC 233 is couple to analog subsystem 225.Attachment device for displaying audio 121 also comprises at least one wave point 249, such as, but not limited to, radio network interface, Bluetooth interface, infrared interface etc.A this wave point is common Wi-fi IEEE802.11 radio network interface.Some embodiments of attachment device for displaying audio 121 also comprise cellular telephone wireless network interface, make this device to serve as cellular phone.Some embodiments also comprise other radio network interface, such as Bluetooth interface.

Attachment device for displaying audio 121 also comprises battery and the electronics subsystems 215 associated, and it is couple to main connector 211 in one embodiment.

In certain embodiments, analog subsystem 225 is connected to main connector 211, makes such as simulated audio signal be available at main connector 211 place.Main connector 211 is also couple to bus subsystem 241 and at least one digital interface 231, any device signal being provided to be connected with main connector 211 and can obtaining from any device be connected with main connector 211.

Analog subsystem 225 is couple to microphone 125, and this microphone 125 is built-in in the present embodiment.Other embodiment can be connected to microphone 125.The present embodiment also comprises at least one loud speaker 227 be connected with analog subsystem 225.Comprise the group of at least one input/output connector 213, make the outer set of loud speaker (such as, being incorporated to the loud speaker in head-telephone (headphone)) can be connected and make different simulated audio signals can be transfused to via analog subsystem 225.

In certain embodiments, user interface 123 comprise operation for show to user information display screen 261, for accepting from one or more button 264 of the input of user and also for accepting the keypad/keyboard 263 from the input of user.In certain embodiments, display screen 261 comprises the touch-sensitive surface for accepting the input from user, and in some this embodiments, at least some in button 264 is so-called soft key, produce because they are specific region the Show Button (may have the message for user) by making display screen 261, and make user contact this specific region just to cause identical input as viewing hardware button.Similarly, although show the module of separation for keypad/keyboard 263, the some or all soft key that can comprise on display screen 261 in these elements.

Storage subsystem 245 comprises the program of the form with executable instruction, this executable instruction make when being performed by least one processor 243 to realize attachment device for displaying audio 121 conventional func and for realize of the present invention in.Such as, some in program 251 provide this function when performing, and show and accept to be included in display screen 261 from button 264(the soft key of display as made) input, and in certain embodiments, accept to have the input of many touch gestures form, as 2010 common.Storage subsystem 245 is also configured to storing digital content, be shown in Figure 2 for audiovisual (AV) content 253 of storage, but it only can comprise the audio frequency of stored digital.Content in the content 253 stored typically is stored as compression data file, such as, is stored as AAC or mp3 file in case of audio, such as audio file 254.Program 251 is also included in and makes the audio file of playback stored digital when being performed to be formed and be converted to analog form by the DAC in module 233 and the instruction of the digital signal of being amplified by least one amplifier in analog subsystem 225.Therefore, attachment device for displaying audio 121 comprises the playback subsystem of the audio signal be configured to selected by playback.In the embodiment illustrated, playback system is made up of the instruction making playback form the audio content of selected audio signal when being performed in the program 251 in the element of analog subsystem 225, the DAC of module 233 and storage subsystem 245.

As will be described in more detail, storage subsystem 245 is also configured to the multiple correcting filter profiles (such as, equalization profile) 257 storing the data required for group comprised to realize correcting filter.In one embodiment, each correcting filter profile 258 of correcting filter profile set 257 provides to realize for the data required for the particular group of one or more correcting filter of specific playback system.Because correcting filter profile 258 provides to realize for the data required for the particular group of one or more correcting filter of specific playback system, therefore in order to language simple for the purpose of, term " correcting filter profile 258 " and " data for the group of one or more correcting filter " will synonymously use.But, there is a kind of mode that profile is only the group realizing one or more correcting filter, therefore use identical language to be not intended to limit the invention to use profile.

Therefore, attachment device for displaying audio 121 comprises filtering subsystem, this filtering subsystem and playback subsystem couple and the playback be configured in selected audio signal by the group applied audio signal of one or more correcting filter.

Storage subsystem 245 is made up of several types storage device, and comprises solid-state memory and can comprise magnetic memory, such as, and hard disk.As can clearly to those skilled in the art, many changes be possible.

Some in the element of attachment device for displaying audio 121 can provide as a part for large integrated circuit.Can between more than one device distribution function.In addition, one or more discrete assembly can be there is.The function of at least one element can by one or more at least one processor 243 performs one or more program to provide.One or more processor 243 can comprise the function of DSP device, such as, has the form of the DSP part of integrated circuit, or in certain embodiments, the form of the separative DSP device of tool.As an alternative or extraly, general processor can be used.Many this changes are possible.In order to not fuzzy original aspect, do not provide the more details of the possible architecture about attachment device for displaying audio 121 in this application.

Example playback system

Fig. 3 illustrates the simplified block diagram of an example embodiment of playback system 103.Attachment device for displaying audio can be connected to more than one playback system.The playback system illustrated is an example.To those skilled in the art can it is clear that be that all elements shown in Fig. 3 all can be included in all playback system embodiments, and further, some playback systems can comprise unshowned extra element in Fig. 3.Such as, the playback system of Fig. 3 comprises many digital elements, comprises the memory of digital media file, and comprises for playback system being connected to wireless network and being used for having the interface of cable network connection.Many playback systems can not have this element.

Playback system is included in the coupler (being coupler 113 shown in Figure 1A and Figure 1B) of attachment device for displaying audio (such as media apparatus 121).In the embodiments of figure 3, coupler 113 has the form being configured to the main connector 311 connected with attachment device for displaying audio (such as, device 121).Main connector 311 comprises the connection accepting simulated audio signal from the attachment device for displaying audio connected.Main connector 311 is connected with analog subsystem 325, and analog subsystem 325 comprises for one or more audio frequency amplifier via one group that couples one or more loud speaker 105 playing back audio signal.

Comprise the group of at least one input/output connector 313, different simulated audio signals can be transfused to via analog subsystem 325.Therefore, as the replacement of main connector 311 or except main connector 311, the analog input connector in 313 also can serve as the coupler (being coupler 113 shown in Figure 1A and Figure 1B) of attachment device for displaying audio.Certainly, some embodiments do not comprise this input additionally, and other embodiment does not comprise the main connector being configured to accept analog input signal.In certain embodiments, lead-out terminal is also included in element 313, makes the outer set that can connect loud speaker, such as, comprises the head-telephone of speaker unit.

In the embodiment illustrated, the control etc. of volume realizes via the user interface 347 comprising digital element in this case.User interface for playback system can also comprise one or more analog element certainly, such as analog volume controller.

The digital element of playback system embodiment 103 comprise for simplicity only be depicted as single bus by bus subsystem 341() element that couples.These digital elements comprise at least one processor 343, storage subsystem 345, user interface 347, at least one digital interface 331 coupled with main connector 311 and one or more digital to analog converter (DAC), and this one or more digital to analog converter (DAC) is for will such as be converted to for the simulated audio signal via the playback at least one loud speaker 105 of one or more audio frequency amplifier in analog subsystem 325 from the digital information of the digital audio signal and so on of the AV content be stored in storage subsystem 345.DAC is shown as module 333 together with their interface associated, and couples with analog subsystem 325.

In some versions, playback system 103 also comprises at least one wave point 349, such as, but not limited to, radio network interface, Bluetooth interface, infrared interface etc.A this wave point is common Wi-fi IEEE 802.11 radio network interface.Radio network interface makes it possible to be connected to network, such as, home network, this home network can be connected to external network again, such as, internet.Some embodiments of playback system 103 also comprise and are configured to accept from the infrared interface of the order of remote control 315 and Bluetooth interface.

Some embodiments also comprise one or more other network interface 335, make playback system 103 to be connected to cable network, such as, cable home networks, this cable home networks can be connected to external network again, such as, internet.

In certain embodiments, main connector is also couple to charging circuit 317, and this charging circuit 317 is configured to supply electric power to charge to the portable playback device connected, and accepts the control signal relevant with charging.

In certain embodiments, main connector 311 is also couple to bus subsystem 341 and at least one digital interface 331, any device signal being provided to be connected with main connector 311 and can obtaining from any device be connected with main connector 311.

In some embodiments comprising one or more processor 343 and storage subsystem 345, storage subsystem 345 comprises the program of the form with executable instruction, and this executable instruction makes when being performed by least one processor 343 conventional func realizing playback system 103.In some this embodiments, storage subsystem 345 is also configured to storing digital content, be shown in Figure 3 for audiovisual (AV) content 353 of storage, but it only can comprise the audio frequency of stored digital.Content in the content 353 stored typically is stored as compression data file, such as, is stored as AAC or mp3 file in case of audio, such as audio file 354.

Although the invention is not restricted to this embodiment, in certain embodiments, the user interface 347 digitally driven is comprised.In the exemplary embodiment, user interface 347 comprise operation for show to user information display screen 361 and for accepting one or more button from the input of user and knob 364.In certain embodiments, display screen 361 comprises the touch-sensitive surface for accepting the input from user, and in some this embodiments, at least some in button or knob 364 is so-called soft key, produce because they are specific region the Show Button (may have the message for user) by making display screen 361, and make user contact this specific region just to cause identical input as viewing hardware button.Therefore, some in program 351 such as provide this function when performing, and show and accept to be included in display screen 361 from button 364(the soft key of display as made) input.

Storage subsystem 345 is made up of several types storage device, and comprises solid-state memory and can comprise magnetic memory, such as, and hard disk.As can clearly to those skilled in the art, many changes be possible.

An aspect of embodiments of the invention is by one or more calibrating signal of playback system playback.In some versions, calibrating signal can such as via aerial lug or via wireless or wired connection input.In other scheme, calibrating signal can be pre-stored in storage subsystem in digital form.In other scheme, calibrating signal can obtain by connecting and be stored in digital form in storage subsystem 355 for playback subsequently.In the example embodiment of Fig. 3, the calibrating signal of stored digital is shown as calibrating signal 355.

Some in the element of playback system 103 can provide as a part for large integrated circuit.Can between more than one device distribution function.In addition, one or more discrete assembly can be there is.The function of at least one element can by one or more at least one processor 343 performs one or more program to provide.Many this changes are possible.In order to not fuzzy original aspect, do not provide the more details of the possible architecture about playback system 103 in this application.

The original aspect of embodiments of the invention is, single attachment device for displaying audio can be connected to some different playback reproducers or even can in various positions by the device listened to.Therefore, although shown an only playback system example here, it will be understood by those skilled in the art that the many possible playback reproducer that there is attachment device for displaying audio and can connect.Some this playback reproducers are relatively simple, and other is more complicated.

Invention disclosed provide for by attachment device for displaying audio directly application correct mechanism and the method that the correction filtering (such as, equalization) of each in the various playback systems that may be attached attachment device for displaying audio is applied in filtering.The invention is not restricted to the correction filtering of any particular type, and equalization is the example as the correction filtering that can be employed described in this application.

Exemplary method

Some embodiments comprise the method for operation attachment device for displaying audio 121.The method comprises, and is couple to specific playback system 103 and when specifically listening in layout, playing back audio signal in the combination of attachment device for displaying audio 121/ playback system at attachment device for displaying audio 121.At playback, the particular group of one or more correcting filter that attachment device for displaying audio application is selected from the set of the data of at least one group for one or more correcting filter prestored.

In attachment device for displaying audio 121 or prestore the data of set of one or more group for correcting filter for attachment device for displaying audio 121.The data of each group for gathering associate with corresponding playback system (arranging with audition).In the figure 2 example, the particular group of one or more correcting filter is shown as profile 258, and this profile 258 comprises to such as realize the group of filter and the data needed by least one in one or more processor 243 being run one or more program.

Note, term " audition layout " can cover a concrete position, maybe can cover for specific playback system the scope listening to position or anyly listen to position.Such as, correcting filter can be designed to equilibrium and have listening to of the playback system of specific loud speaker 105, and when being determined, the scope listening to position may can be can be used for for a concrete listener positions.In addition, can carry out measuring (record) from multiple position, to determine single average correcting filter for the scope of position.Therefore, term " audition layout " should not be considered to only imply and use the single of specific playback system to listen to position, that is, be not suitable for other position using specific playback system.First, the scope that the correcting filter determined can be used to position is recorded according to from one or more of single position, and secondly, in some calibration steps embodiments, can carry out measuring from some positions to determine to be suitable for single group of " on average " correcting filter of the scope of position.

Exemplary calibration method

The particular group of one or more correcting filter is determined by calibration process.Fig. 4 shows the simplified flow chart of the embodiment of calibration steps 400.Method 400 comprises: in 403, one or more predefined calibrating signal 111 of playback on specific playback system 103, and, in 405, at playback, portable playback device 121 records the sound field obtained by one or more predefined calibrating signal 111 of playback on specific playback system 103.Microphone 125 that is built-in or that be connected with attachment device for displaying audio 121 in attachment device for displaying audio 121 is utilized to carry out this record when one or more listener positions place expected in a part of arranging as audition of this microphone 125.As noted before, the more than one position arranged with audition and associate can be there is, and this record can be included in the record that more than one position is carried out.The method comprises: in 407, analyze the record of sound field to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system (and may also for acoustic surrounding), and in 409, in attachment device for displaying audio or for attachment device for displaying audio, store the particular group for one or more correcting filter of specific playback system (and acoustic surrounding).

In one group of embodiment, be stored in attachment device for displaying audio 121.In another group embodiment, store (although may provisionally) and on attachment device for displaying audio 121, then or after a while remotely store for attachment device for displaying audio 121, such as, remote storage system on the remote server stores.Therefore, at attachment device for displaying audio 121 " in or for " attachment device for displaying audio 121 for specific playback system 103(and acoustic surrounding) store.

In one embodiment, attachment device for displaying audio 121 comprises user interface, and this user interface presents ' calibration ' button or presents and is provided for some other function that user can indicate the record of the particular group realizing one or more correcting filter, analysis and storage in button 264.Calibration steps comprises the instruction that receives on a user interface from user to realize the record of the particular group of one or more correcting filter, analysis and storage, and realizes these steps in response to this reception.

In addition, comprise in some embodiments of its oneself microphone at attachment device for displaying audio 121, the embodiment of the method provides that be highly susceptible to using, self-contained form factor (formfactor) for calibration.User can knock ' calibration ' button in button 264 simply, and remains in LisPos by attachment device for displaying audio 121, such as, before playback system loud speaker 105.

Calibrating signal to be in one embodiment pre-stored in attachment device for displaying audio 121 (such as, be stored in advance in the storage subsystem 245 of attachment device for displaying audio 121 as calibrating signal 255), and be loaded in playback system 103 for being stored in playback system.In other embodiments, attachment device for displaying audio 121 is by wire or be wirelessly connected to playback system from LisPos, and calibrating signal is sent to playback system 103 and playback, and the sound field that result obtains is recorded for analyzing to determine the particular group of one or more correcting filter of the combination for attachment device for displaying audio 121 and playback system.In yet another embodiment, one or more calibrating signal provides for playback on playback system by some other mechanism, such as, is preloaded in playback system, or is provided in real time by another source.The invention is not restricted to any specific mode that one or more calibrating signal is provided to playback system.The present invention is also not limited to the mode that any calibrating signal is provided to playback system, such as, and digital form or as analog signal.

The exemplary method of operation attachment device for displaying audio,

Fig. 5 shows operation attachment device for displaying audio (such as, device 121) the simplified flow chart of method 500, for this attachment device for displaying audio or on this attachment device for displaying audio store be used for correcting filter group set data (such as, there is the form of the data for realizing correcting filter), each group associates with corresponding playback system (arranging with audition).

The method comprises: in 503, in specific acoustic surrounding, attachment device for displaying audio 121 is connected to specific playback system 103.The method also comprises: in 505 (manually or automatically) select to prestore at least for for specific playback system 103(and may also for acoustic surrounding) carry out the particular group of one or more balanced correcting filter.When locally not storing the data of set of the group being used for correcting filter, 505 comprise the particular group of at least loading one or more selected correcting filter.This may occur discretely, and locates in the time different from this selection.507 to be included in when attachment device for displaying audio 121 is connected to specific playback system 103 playing back audio signal on attachment device for displaying audio 121.This playback comprises the particular group of one or more correcting filter of application.

Select the group of one or more correcting filter

When carrying out manually selecting in 505, in certain embodiments, attachment device for displaying audio comprises user interface 123, this user interface 123 comprise such as button 264 to the instruction of the group of one or more correcting filter prestored of user.The method comprises: media mancarried device 121 such as receives the instruction from user via user interface 123 to use the particular group of one or more correcting filter for playback.

Some embodiments provide the automatic selection of the group of one or more correcting filter.In certain embodiments, such as, for some so-called " docking loud speaker " playback systems, playback system can be configured to provide instruction to the attachment device for displaying audio of attachment, such as, the instruction type of playback reproducer and/or the signal of model is provided via main connector.In certain embodiments, method 500 comprises: attachment device for displaying audio receives the instruction from specific playback system indicating specific attachment device for displaying audio and specific playback system to couple.Some embodiments of attachment device for displaying audio are configured such that, in response to this instruction, the method comprises selects the particular group of one or more correcting filter associated with specific attachment device for displaying audio for playback automatically.

In addition, some embodiments of attachment device for displaying audio have predefined group of the predefined correcting filter of playback system for specific classification.Such as, simply " docking loud speaker " playback system can form a classification, television receiver can form a classification, the household three-dimensional acoustic receiver with the loud speaker of connection can form a classification, the family expenses receiver with the sub-woofer speaker (subwoofer) of connection can form a classification, automobile playback system in automobile can form a classification, like this.In certain embodiments, at least one group in the group of correcting filter is for the predefined default set of a class playback system.

The type of correcting filter

How the type or this correcting filter that the invention is not restricted to any specific correcting filter are implemented or specify.In the near future, attachment device for displaying audio can have enough disposal abilities to realize than one group of correcting filter that multi-band equalization filter is more complicated.The type of some possible correcting filters is described below.These are provided as just example and do not limit the invention to the type of any specific correcting filter.

Multi-band equalization filter

Some embodiments of the group of one or more correcting filter comprise the group of multi-band equalization filter.The frequency range listened to is divided into one group of frequency band, and each filter of this group multi-band equalization filter is one of frequency band setting relative gain.This multi-band equalization filter is known in the art.Quantity for the frequency band of any specific attachment device for displaying audio can be fixing, or can set, and typically be relatively little quantity, and such as, 6,9 or 12.There is many modes realizing this filter, and the digital signal processing method that an embodiment uses the program in the program 251 performed by processor 243 (such as, on DSP element) to realize.That is, the particular group applying one or more correcting filter when attachment device for displaying audio is couple to specific playback system is included at least one in one or more processor of attachment device for displaying audio carries out digital processing to digital signal.In certain embodiments, multi-band equalization filter implanted (implant) is as the set of number parameter filter at each frequency band place.This parameter filter is limited by one group of parameter.In one embodiment, each group of correcting filter profile 258 as correcting filter profile set 257 of parameter is stored, and can be used for realizing the particular group for one or more correcting filter of specific playback system.

In alternative embodiments, the playback circuitry in attachment device for displaying audio 121 realizes one group of variable gain according to the respective gain parameter of the frequency band for predefined quantity and controls.One group of gain setting is stored as the correcting filter profile 258 of correcting filter profile set 257, and can be used for realizing the particular group for one or more correcting filter of specific playback system.

Multi-channel audio

More complicated correcting filter is applicable to the playback via the playback system comprised more than two loud speakers, such as, provides the playback system of surround sound, as common in current home theater system.Correcting filter for this playback system can comprise more complicated setting, and this is set as that the signal produced for the different loud speaker 105 in playback system by attachment device for displaying audio 121 provides relative gain.

Perception territory (Perceptual domain) processes

Recently, the process of perception territory is invented, and that takes into account the change of the perception of the audio frequency of the reproduction level depending on audio signal.The audio signal of the time sampling represented is pretreated to produce the time varying spectrum of the signal level in the multiple frequency band of instruction (critical band), such as, 40 bands, each band is represented by frequency band number, and block change in time.The time varying spectrum of audio signal can be produced in many ways, but advantageously, with being separated so that the frequency resolution of the simulating human sense of hearing.Calculate the amount being called pumping signal, it is close to the distribution at critical band place along the energy of the basilar memebrane of the inner ear of the mankind during time block.Although other can also be used to convert, the discrete cosine transform (MDCT) such as revised, but by using analogue audio frequency through the group selected by the frequency response of the external ear of the mankind and the filter of inner ear and band pass filter (such as, be chosen as and imitate at be concerned about each critical band place along the band pass filter of critical band filtering that the basilar memebrane in human ear is observed) calculate the discrete Fourier transform in short-term (STDFT) of the operation of audio signal, thus effectively can realize the excitation of perception territory.Example embodiment uses one group of filter with the spacing of 1ERB, and result obtains 40 bands altogether.

There is the multi-band compressor reducer that tone color keeps the distortion of (timbre preservation) to reduce

In playback reproducer, voice reproducing can by perceivable distortion, and usually along with playback playback level increases and distortion tempestuously.This distortion is often for playback reproducer frequency dependence.Correct a form of filtering be before playback by multi-band compression applications in audio signal to reduce distortion and to make great efforts to make playback level maximize.A straightforward procedure comprises appointment distortion threshold, and its each frequency band for compressor reducer is designated.Different yield values is applied to each frequency band to guarantee to output signal any one that be no more than in corresponding distortion threshold by compressor reducer independently.

The tone color that the one group of correcting filter improved comprises in multi-band compressor reducer keeps.Tone color be maintained by according to (i) for frequency band respective fixing threshold value and determine in multiple frequency band in each according to the audio signal level (numeral or simulated audio signal) in (ii) the second frequency band and the fixed threshold (iii) in the second frequency band at least in part time variable threshold value realize.Therefore, time each, variable threshold value is that input signal is adaptive.If specific frequency band is due on its fixed threshold (or, close to fixed threshold) and receive significant gain and reduce, then the time variable threshold value of one or more other frequency band also reduces and reduces to receive some gains.

Apply multi-band compressor reducer that this tone color keeps to correct an example embodiment of filtering and comprise and to provide for the first frequency band or determine fixed threshold and determine the first level of the audio signal in the first frequency band.First level can be less than fixed threshold.The method comprises further also for the second level of the second frequency band determination audio signal, and variable threshold value when being calculated for the first frequency band by use second level.Time variable threshold value be less than fixed threshold.The method comprises the audio signal in the first frequency band is decayed to variable threshold value when being equal to or less than, or alternately, along with close to time variable threshold value and the audio signal decayed all the more in the first frequency band.Variable threshold value when can calculate with the average difference of its corresponding fixed threshold according to the audio input signal in each frequency band.Alternatively, the second fixed threshold for the second frequency band can be determined further.Second level of audio signal can more than the second fixed threshold, and result obtains the audio signal in the second frequency band to decay to the second fixed threshold.One group of correcting filter for realizing this method comprises multi-band bank of filters (filterbank), compression function element and at least one tone color holding element.Each compression function element can be exclusively used in frequency band.Tone color holding element is couple to multi-band bank of filters and compression function element.Tone color holding element receives the fixed threshold for each frequency band and provides the time variable threshold value for each frequency band.Time variable threshold value for frequency band is determined by the horizontal component of out-of-band audio signal.

For the more details of this correction filtering, see the U.S. Provisional Patent Application 61/315 being entitled as " TECHNIQUES FOR DISTORTION REDUCING MULTI-BANDCOMPRESSOR WITH TIMBRE PRESERVATION " that on March 18th, 2010 submits to, 172, its content is by reference to being incorporated in this, and its copy is enclosed as appendix A at this.

For mating the liftering of target response

Another form application inverse filter correcting filtering, to change the frequency response of the loud speaker of playback system, efforts be made so that the loud speaker of liftering exports and target frequency responses match.As described above based in perception process, the frequency band of the whole frequency range that the consideration that the method have been applied to " critical band "-actuate according to perception is determined.Typically, the critical band of division audible frequency range has the width along with the frequency of crossing (across) audible frequency range increases.The method uses " critical point band (critically banded) " data, and hint whole frequency range comprises critical band, and data comprise subset, and each subset is made up of the data of the audio content in different that represents in critical band.

Target frequency response can be smooth or can have some other reservation shape.

In certain embodiments, calibration steps comprises the loud speaker determination inverse filter for playback system.Calibration comprises: the impulse response measuring the loud speaker at each place in the many different locus in audition is arranged, time alignment carried out to the impulse response measured and is averaging to determine average impulse response, and using critical band smoothing to determine inverse filter according to average impulse response and target frequency response.Such as, critical band smoothing can be applied to average impulse response and during determining inverse filter, also be applied to target frequency response alternatively, or can be applied to determining that target frequency responds.Can guarantee to listen to for various the frequency response that loud speaker is determined in position in the measurement of the impulse response at multiple locus place.In certain embodiments, the time alignment of the impulse response of measurement performs by using real cepstrum (real cepstrum) and minimum phase reconstruct (minimum phasereconstruction) technology.

In certain embodiments, average impulse response is converted into frequency domain via discrete Fourier transform (DFT) or other time domain to the conversion of frequency domain.The frequency component that result obtains represents the average impulse response of measurement.These frequency components in each transformation library (bin) are combined into the frequency domain data in the critical band (such as 20 bands or 40 bands) of lesser amt, as the process of other perception territory.Dividing with becoming the critical point of frequency resolution being with data to be designed to imitate human auditory system of average impulse response data.Frequency component in conversion frequency storehouse to be weighted and by the frequency component produced for each critical band that the data for band weighting sue for peaces typically via applying suitable critical band-splitting filter to it, thus to perform and point to be with.Typically, these filter table reveal approximately circular (rounded) exponential shape and are separated equably with the yardstick of equivalent rectangular bandwidth (Equivalent RectangularBandwidth, ERB).Spacing in the frequency of critical band and crossover provide suitable with the ability of human auditory system measured by the degree of regularization (regularization) of impulse response.The application of critical band filters is an example (perceptually the irregular of incoherent impulse response typically smooths out by critical band filters, makes determined inverse filter not need cost resource to correct these details) of critical band smoothing.

For determining that the value of inverse filter determines according to the target response in frequency window (such as, critical band) and average impulse response (such as according to the version of its smoothing).The impulse response data of critical point of band are used to find the inverse filter realizing the target response expected.In certain embodiments, in order to maintain equal loudness when using inverse filter, inverse filter is preferably for the reference signal (such as pink noise) normalization (normalize) of the common sound of its spectrogram representation.

In certain embodiments, directly inverse filter coefficient is calculated in the time domain.

The inverse filter that result obtains forms the group being applied to the correcting filter of the signal in playback system as described in this application.

For the more details of this correction filtering, see the international patent application No.PCT/US2010/020846 being entitled as " METHOD FOR DETERMINING INVERSE FILTER FROMCRITICALLY BANDED IMPULSE RESPONSE DATA " that on January 13rd, 2010 submits to, its content is by reference to being incorporated in this, and its copy is enclosed as Appendix B at this.

Store the data of the group of correcting filter

In certain embodiments, to be stored on attachment device for displaying audio 121 or for attachment device for displaying audio 121 as the part of the set of group for the group that realizes the parameter of the group of one or more correcting filter and to be stored.In certain embodiments, this set is stored with the form of database.Each entry is one group of parameter of the group for realizing one or more correcting filter for specific playback system, and the indicating device that the particular group comprising one or more correcting filter associates with specific playback system.Therefore, the indicating device that the particular group comprising one or more correcting filter of storage for the step 409 of Fig. 4 of this embodiment associates with specific playback system.

In certain embodiments, the data (such as, database) for the set of one or more group of correcting filter are stored in the storage subsystem be included in attachment device for displaying audio.Therefore, as shown in Figure 2, in certain embodiments, storage subsystem 245 comprises correcting filter profile 257, and shows a this profile 258.

In other embodiments, the data of set of one or more group for correcting filter are stored away from attachment device for displaying audio.Fig. 6 shows a simplified block diagram arranged according to some embodiments of the present invention, and these embodiments comprise the remote storage of the data of the set of one or more group for correcting filter.During step 409, originally can be stored in the storage device in attachment device for displaying audio 121 temporarily, and store at a distance subsequently, such as, be connected to network 625(at attachment device for displaying audio that it can be any individual or public network, even internet) personal computer 623 that couples time store at a distance.Server system 627 is also connected to network 625.Server system 627 comprises one or more processor and storage subsystem 645.Storage subsystem 645 is configured to the data of one or more set stored for the group of correcting filter, and each this set is with specific attachment device for displaying audio 121 or specifically user or specific user associate with attachment device for displaying audio.In shown example, show the data of a set 657 of one or more group for correcting filter.Show the data for a group 658.In certain embodiments, the data of this set have the form of database.The data of each group for one or more correcting filter are stored the entry comprising the parameter in order to realize correcting filter being called correcting filter profile in a database as us.When attachment device for displaying audio 121 is connected to the personal computer 623 be connected with server 627 via network, send the particular group of the correcting filter in the temporary storage in attachment device for displaying audio 121 for being stored in the storage subsystem 645 of server 627.Similarly, when attachment device for displaying audio 121 is connected to the personal computer 623 be connected with server 627 via network, one or more group be stored in such as the correcting filter of correcting filter profile in storage subsystem 645 can be loaded onto the use for playback in attachment device for displaying audio 121.Therefore, such as, when attachment device for displaying audio and specific playback system couple, the particular group for the correcting filter of specific playback system can be loaded into the use of attachment device for displaying audio 121 for playback from remote memory.

Analyze

Process action 405 is included in sound field attachment device for displaying audio 121 recording and is obtained by playback calibrating signal on playback system 103.Process action 407 comprises analyzes this record to determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system (and may also for acoustic surrounding).

The invention is not restricted to one or more calibrating signal of any specific type or any specific analytical method.In one embodiment, calibrating signal by the known amplitude at the different frequency place in predefined quantity different periodicity pitches and form.In one embodiment, centre frequency is the centre frequency of the correcting filter used in attachment device for displaying audio 121.The centre frequency of graphic equalizer distributes with being generally logarithm, such as, with octave (in octaves).In certain embodiments, therefore the centre frequency of the component of test signal is also expanded by logarithm.In certain embodiments, the amplitude of the different frequency component of test signal is equal, and in other embodiments, amplitude changes according to the inverse of frequency.

Analyzing and processing 407 comprises the amplitude determined at the different frequency place of recorded record to determine to make to respond balanced gain in the meeting at frequency place.The data of the particular group of one or more correcting filter are formed in the gain at centre frequency place, such as, for attachment device for displaying audio 121 or in attachment device for displaying audio 121 for the correcting filter profile that specific playback system and acoustic surrounding store.

Noise signal is used for calibrating signal by an alternate embodiments.In one embodiment, calibrating signal is white noise signal, that is, all frequencies are had to the noise signal of identical power distribution.In another embodiment, calibrating signal is pink noise signal, that is, have the noise signal that the power proportional with the inverse of frequency distributes.Being used as in some embodiments of calibrating signal in noise signal, utilizing the digital synthesis method of pseudo noise to produce noise signal by using.

Be used as in some embodiments of calibrating signal in noise signal, analyze 407 and comprise and well known to a person skilled in the art that method (such as by realizing discrete Fourier transform (DFT), such as performing as fast Fourier transform (FFT)) determines the spectrum of sound field recorded by using.

According to the object reference spectrum of the result of conversion and the signal after processing for the group by one or more correcting filter, determine and store the data of the particular group for one or more correcting filter, the particular group of this one or more correcting filter revises the determined spectrum of the sound field recorded to mate the object reference spectrum for specific playback system and acoustic surrounding.

Be used for analyzing 407 by digital method although be described above, in alternative embodiments, some or all in this analysis can be performed by analog circuit.The signal of record is such as divided into frequency band by one group of band pass filter, and level measuring circuit is used to determine the signal of the signal power represented in frequency band.Then these data values can be digitized, and determine that one group of gain for frequency band is using as data so that the group for one or more correcting filter for specific playback system and acoustic surrounding stores.

Because being described herein method and apparatus.In certain embodiments, calibrating signal is played on playback system.Use microphone that is built-in or attachment, the sound field that result obtains is recorded on attachment device for displaying audio.The sound field of analytic record and the group calculated for one or more correcting filter of playback system.On attachment device for displaying audio or store the data of group being used for one or more correcting filter for attachment device for displaying audio, these data associate with described playback system.Therefore the data of the set of the group being used for correcting filter are stored.Then can fetch the data for particular group of storage, and when attachment device for displaying audio attaches to corresponding playback system from attachment device for displaying audio to the particular group of played any one or more correcting filter of voice applications.Apply equalization because embodiments of the invention are included in attachment device for displaying audio, therefore such an embodiment provides the benefit of the indoor equalization for the audio playback system not comprising this feature.In addition, when attachment device for displaying audio comprises its oneself microphone, some embodiments of the present invention provide that be highly susceptible to using, self-contained form factor for calibration.User knocks calibration knob simply and keeps attachment device for displaying audio listening in position before the loud speaker of playback system.

In the context of the document, term " wireless " and derivative thereof can be used to describe and can transmit the circuit, device, system, method, technology, channel etc. of data by using the electromagnetic radiation of modulation by non-solid medium.

Except non-specific statement, otherwise, as apparent from following explanation, understand and in the discussion of whole specification, to utilize the term of such as " process ", " calculating ", " computing ", " determination " etc. and so on to refer to handle and/or data that conversion is expressed as physical quantity (such as electronics amount) become to be expressed as similarly the computer of other data of physical quantity or the action of computing system or similar computing electronics and/or process.

In a similar fashion, term " processor " can refer to processing example if the electronic data from register and/or memory is to be transformed to any device of other electronic data that such as can be stored in register and/or memory or the part of device by this electronic data." computer " or " computing machine " or " computing platform " can comprise one or more processor.

Note, when describing method comprises some key elements (such as, some steps), unless stated particularly, otherwise do not imply the order of this key element (such as, step).

In certain embodiments, computer-readable storage medium is configured to have (such as, had by coding) instruction stored therein, this instruction makes when one or more processor of processed system (such as comprising digital signal processing device or the subsystem of at least one processor elements and storage subsystem) performs to realize the method as described in this application.

The methodology described in this application be in certain embodiments can by be received in one or more computer-readable medium is encoded instruction, logic one or more processor perform.When being performed by one or more processor, instruction makes at least one method realizing describing in this application.Comprise any processor that can perform one group of instruction (order or other) of specifying the action that will take.Therefore, an example is the typical treatment system comprising one or more processor.Each processor can comprise in CPU or similar element, Graphics Processing Unit (GPU) and/or programmable DSP unit one or more.Treatment system also comprises the storage subsystem with at least one storage medium, it can comprise the memory embedded in semiconductor device, or comprises main RAM and/or static RAM (SRAM) and/or ROM and also comprise the memory sub-system of separation of cache memory.Storage subsystem can also comprise one or more other storage device, such as magnetic and/or optics and/or other solid-state storage device.Bus subsystem can be comprised for communicating between the components.Treatment system can also be the distributed processing system(DPS) with the processor coupled by network (such as, via Network Interface Unit or radio network interface device).If treatment system requires display, then can comprise this display, such as, liquid crystal display (LCD), organic light emitting display (OLED) or cathode ray tube (CRT) display.If require the input of manual data, then treatment system also comprise such as alphanumeric input unit (such as keyboard), point to control device (such as mouse) etc. in one or more and so on input unit.If be based on context clearly and unless explicitly stated, otherwise term as used in this application " storage device ", " storage subsystem " or " memory cell " also comprise the storage system of such as disk drive unit and so on.Treatment system in some configurations can comprise voice output and Network Interface Unit.

Therefore storage subsystem comprises computer-readable storage medium, this computer-readable storage medium is configured to have (such as, had by coding) instruction, such as, logic, such as, software, this instruction make in the method step realizing describing in this application when being performed by one or more processor one or more.Software may reside in hard disk, or all or at least in part can also be present in RAM and/or in processor by the term of execution of computer system at it.Therefore, memory and processor also form the computer-readable medium of the instruction it having coding.

In addition, computer-readable storage medium can form computer program, or is included in computer program.

In alternative embodiments, one or more processor operations connects (such as in independently device or the deployment that can connect at network, network connects) to one or more other processor, one of them or more processor with the status operation of the status of server or client machine in server-client network environment, or can operate as peer machines in equity or distributed network environment.Unless got rid of clearly in this application, otherwise term " treatment system " comprises all such possibilities.One or more processor can form personal computer (PC), attachment device for displaying audio, media playback system, dull and stereotyped PC, Set Top Box (STB), PDA(Personal Digital Assistant), game machine, cellular phone, Web apparatus (appliance), network router, switch or bridge or can perform any machine of one group of instruction (order or other) of specifying the action will taked by this machine.

Note, although some figure illustrate only single processor and single storage subsystem, such as, store the single memory comprising the logic of instruction, but it will be appreciated by those skilled in the art that the many assemblies in above-described assembly are included, but illustrate ambiguously or describe in order to not fuzzy original aspect.Such as, although only illustrate individual machine, term " machine " should also be regarded as comprising and perform one group of (or many groups) instruction independently or in combination to perform any set of the individual machine of any one in the methodology discussed in this application or more.

Therefore, each embodiment in the method described in this application has the form of computer-readable storage medium, this computer-readable storage medium is configured to have one group of instruction, such as, computer program, it makes implementation method step when the upper execution of one or more processor (such as, as one or more processor of a part for attachment device for displaying audio).Some embodiments have the form of logic itself.Therefore, as will be apparent to those skilled in the art, embodiments of the invention can be implemented as method, equipment (such as special purpose equipment), equipment (such as data handling system), logic (such as, be embodied in computer-readable storage medium) or coding have the computer-readable storage medium of instruction (such as, configuring the computer-readable storage medium as computer program).Computer-readable medium is configured to have one group of instruction, and this instruction makes implementation method step when being performed by one or more processor.Therefore, the form of method, completely hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect can be taked in aspect of the present invention.In addition, the present invention can take programmed logic such as in computer-readable medium (such as, computer program on computer-readable storage medium) or configure the form with the computer-readable medium (such as, computer program) of computer-readable program code.

Although computer-readable medium is shown as single medium in the exemplary embodiment, but term " medium " should be regarded as comprising the single medium of the instruction storing one or more group or multiple medium (such as, the high-speed cache of some memories, centralized or distributed data base and/or association and server).Computer-readable medium can take many forms, includes but not limited to non-volatile media and Volatile media.Non-volatile media comprises, such as, and CD, disk and magneto optical disk.Volatile media comprises dynamic memory, such as main storage.

Also will understand, embodiments of the invention are not limited to any specific implementation or programming technique, and the present invention can use any suitable technology for realizing the function described in this application to realize.In addition, embodiment is not limited to any specific programming language or operating system.

In whole specification, mention that " embodiment " or " embodiment " mean, be combined the specific feature, structure or the characteristic that describe with embodiment and be included at least one embodiment of the present invention.Therefore, the phrase " in one embodiment " in each place in whole specification or the appearance of " in an embodiment " differ to establish a capital and refer to same embodiment, but may refer to same embodiment.In addition, as those skilled in the art can clearly according to the disclosure, can in any suitable manner in conjunction with specific feature, structure or characteristic in one or more embodiment.

Similarly, be understood that, in the foregoing description of example embodiment of the present invention, simplify for making the disclosure and help one or more the object understood in each original aspect, each feature of the present invention is integrated into sometimes together at single embodiment, figure or during it illustrates.But disclosed the method is not interpreted as reflecting that invention required for protection needs the intention of feature more more than the feature clearly described in each claim.On the contrary, as claim reflection below, original aspect depends on and is less than single all features in front disclosed embodiment.Therefore, the claim after embodiment is hereby expressly incorporated into this detailed description in this embodiment thus, and each claim self remains independent embodiments of the invention.

In addition, although some embodiments described in this application comprise some features of being included in other embodiment but do not comprise further feature, but the combination of the feature of different embodiments intention within the scope of the present invention, and form different embodiments, as skilled in the art will understand.Such as, below in claim, any claimed embodiment can be used with any combination.

In addition, some embodiments are described in this application as can by the combination of the key element of the processor of computer system or the method realized by other parts of practical function or method.Therefore, the processor with the required instruction of the key element for realizing this method or method forms the parts of the key element for implementation method or method.In addition, the element of the apparatus embodiments described in this application is for realizing by the example of the parts of the function performed for the element realizing object of the present invention.

In the explanation provided in this application, set forth many details.But, be to be understood that embodiments of the invention can be put into practice when not having these details.In other example, in order to not fuzzy to the understanding of this explanation, be not shown specifically known method, structure and technology.

Unless otherwise prescribed, as used in this article, use for the ordinal adjectives " first ", " second ", " the 3rd " etc. that describe common object only indicates the different example mentioning similar object, and is not intended to imply that the object so described must have the sequence provided temporally, spatially, hierarchically or in any other way.

The all United States Patent (USP)s quoted in this application, U.S. Patent application and specify the world (PCT) patent application of the U.S. by reference to being incorporated in this.Do not allow by reference to being incorporated to itself by with reference to when being incorporated to the material of information in patent regulation or regulation, material in this application by reference to be incorporated in this material by reference to being incorporated to any information got rid of by reference to being incorporated to, unless this information is clearly by reference to being incorporated into this.

The discussion of any prior art in this manual never should be considered to this prior art be generally known, the public known or the accreditation of the part that forms the general knowledge in this area.

In explanation in claim below and the application, term " comprises ", " by ... composition " or any one in " it comprises " are open terms, and it means the element/feature at least comprised subsequently, but does not get rid of other.Therefore, when using in the claims, term " comprises " parts or element or step that should not be interpreted as limiting and list thereafter.Such as, the scope stating " device comprises A and B " should not be limited to the device be only made up of element A and B.Term as used in this article " comprises " or any one in " it comprises " or " comprising ... " is also open term, and it also means at least to comprise the element/feature after this term, but do not get rid of other.Therefore, " to comprise " and " comprising " synonym and meaning " comprising ".

Similarly, it should be noted that when using in the claims, term " couples " and should not be interpreted as being restricted to only directly connecting.Term can be used " to couple " and " connection " and derivative thereof.Be to be understood that these terms are not intended to as synonym each other.Therefore, the output that the scope of " device A is couple to device B " stated should not be limited to wherein device A is directly connected to device or the system of the input of device B.This means existence between the output and the input of B of A can be the path in the path comprising other device or parts." couple " and two or more element direct physical or electrical contacts can be meant, or two or more elements are not in direct contact with one another but still cooperate or interact with each other.

Therefore; although described the embodiment being considered to the preferred embodiments of the present invention; but to those skilled in the art will recognize that when not departing from spirit of the present invention and can carry out other and amendment further to it, and be intended to claimed as fall within the scope of the present invention all change and amendment.Such as, any formula provided above only represents operable process.Can add in block diagrams or delete function from block diagram, and can swap operation between functional blocks.Can add or delete step the method described within the scope of the present invention.

Claims (25)

1. operate a method for attachment device for displaying audio, comprising:

Attachment device for displaying audio records the sound field obtained by one or more predefined calibrating signal of playback on specific playback system, this playback system comprises loud speaker and in the outside of attachment device for displaying audio, utilize built-in in attachment device for displaying audio or carry out this record at this microphone when the listener positions place of the multiple different expectation that specific audition is arranged from the microphone that attachment device for displaying audio connects, measuring the impulse response at each place in the multiple different locus of loud speaker in specific audition is arranged thus;

Measured impulse response is averaging to determine average impulse response;

According to the target response of average impulse response and the loud speaker according to specific playback system, determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system, and

The data for the particular group for one or more correcting filter of specific playback system are stored in attachment device for displaying audio or for attachment device for displaying audio,

Wherein, when attachment device for displaying audio and specific playback system couple, when attachment device for displaying audio applies the particular group of one or more correcting filter, attachment device for displaying audio and specific playback system be combined in specific audition arrange in playing back audio signal.

2. the method for claim 1, also comprises and critical band smoothing is applied to average impulse response.

3. the method for claim 1, wherein the particular group of correcting filter or the data for it are stored in the storage subsystem be included in attachment device for displaying audio.

4. the method as described in any one in Claim 1-3, wherein comprises: the indicating device that the particular group storing one or more correcting filter associates with specific playback system in attachment device for displaying audio or for the attachment device for displaying audio particular group of storage for one or more correcting filter of specific playback system or the data for it.

5. the method as described in any one in Claim 1-3, wherein attachment device for displaying audio comprises user interface, and wherein calibration steps comprise the instruction that receives on a user interface from user in case realize one or more correcting filter particular group or for its data record, determine and store.

6. the method as described in any one in Claim 1-3, wherein attachment device for displaying audio is by network-coupled to teleprocessing system, and wherein determines that particular group comprises:

The sound field of record or the data relevant with it are sent to teleprocessing system,

Particular group is determined in teleprocessing system, and

Determined particular group or the data for it are received from teleprocessing system via network.

7. the method as described in any one in Claim 1-3, wherein determines that the step of particular group is performed by one or more processor be included in attachment device for displaying audio.

8. the method as described in any one in claim 1 to 2, one of them or more the particular group of correcting filter or the data for it be stored in the storage subsystem away from attachment device for displaying audio, make attachment device for displaying audio and specific playback system couple for during playing back audio signal or before the particular group of correcting filter or the data for it be loaded in attachment device for displaying audio.

9. the method as described in any one in Claim 1-3, wherein attachment device for displaying audio can operate as portable phone.

10. operate an equipment for attachment device for displaying audio, comprising:

For recording the device of the sound field obtained by one or more predefined calibrating signal of playback on specific playback system on attachment device for displaying audio, this playback system comprises loud speaker and in the outside of attachment device for displaying audio, utilize built-in in attachment device for displaying audio or carry out this record at this microphone when the listener positions place of the multiple different expectation that specific audition is arranged from the microphone that attachment device for displaying audio connects, measure the impulse response at each place in the multiple different locus of loud speaker in specific audition is arranged thus,

For being averaging to determine the device of average impulse response to measured impulse response;

For according to average impulse response and determine at least for carrying out the device of the particular group of one or more balanced correcting filter for specific playback system according to the target response of the loud speaker of specific playback system, and

For storing the device for the data of the particular group for one or more correcting filter of specific playback system in attachment device for displaying audio or for attachment device for displaying audio,

Wherein, when attachment device for displaying audio and specific playback system couple, when attachment device for displaying audio applies the particular group of one or more correcting filter, attachment device for displaying audio and specific playback system be combined in specific audition arrange in playing back audio signal.

11. equipment as claimed in claim 10, also comprise the device for critical band smoothing being applied to average impulse response.

12. equipment as claimed in claim 10, wherein the particular group of correcting filter or the data for it are stored in the storage subsystem be included in attachment device for displaying audio.

13. equipment as described in any one in claim 10 to 12, wherein for comprising in attachment device for displaying audio or for the device that attachment device for displaying audio stores the particular group for one or more correcting filter of specific playback system or the data for it: the device of the indicating device that the particular group for storing one or more correcting filter associates with specific playback system.

14. equipment as described in any one in claim 10 to 12, wherein attachment device for displaying audio comprises user interface, and wherein calibration process comprise the instruction that receives on a user interface from user in case realize one or more correcting filter particular group or for its data record, determine and store.

15. equipment as described in any one in claim 10 to 12, wherein attachment device for displaying audio by network-coupled to teleprocessing system, and wherein for determining that the device of particular group comprises:

For the sound field of record or the data relevant with it being sent to the device of teleprocessing system,

For determining the device of particular group in teleprocessing system, and

For receiving the device of determined particular group or the data for it from teleprocessing system via network.

16. equipment as described in any one in claim 10 to 12, wherein for determining that the device of particular group comprises one or more and is included in processor in attachment device for displaying audio.

17. equipment as described in any one in claim 10 to 11, one of them or more the particular group of correcting filter or the data for it be stored in the storage subsystem away from attachment device for displaying audio, make attachment device for displaying audio and specific playback system couple for during playing back audio signal or before the particular group of correcting filter or the data for it be loaded in attachment device for displaying audio.

18. equipment as described in any one in claim 10 to 12, wherein attachment device for displaying audio can operate as portable phone.

19. 1 kinds of attachment device for displaying audios, comprising:

Playback subsystem, is configured to the audio signal selected by playback;

Filtering subsystem, couple with playback subsystem and the playback be configured in audio signal by the group applied audio signal of one or more correcting filter;

Coupler, is configured to attachment device for displaying audio to couple with the coupler of mating be included in playback system; Wherein this playback system comprises loud speaker and in the outside of attachment device for displaying audio;

User interface, is configured to accept the input from user; And

Microphone or the coupler to microphone;

When wherein filtering subsystem is configured to attachment device for displaying audio and specific playback system be coupled in specific audition is arranged, the particular group of arranging one or more correcting filter associated with specific playback system and specific audition is applied during via specific playback system playing back audio signal

Wherein the attachment device for displaying audio calibration process be configured to by comprising following operation determines the particular group of one or more correcting filter:

Record the sound field obtained by one or more predefined calibrating signal of playback on specific playback system, utilize the microphone in attachment device for displaying audio or carry out this record at this microphone when the listener positions place of the multiple different expectation that specific audition is arranged from the microphone that attachment device for displaying audio connects, measure the impulse response at each place in the multiple different locus of loud speaker in specific audition is arranged thus;

Measured impulse response is averaging to determine average impulse response;

According to the target response of average impulse response and the loud speaker according to specific playback system, determine at least for carrying out the particular group of one or more balanced correcting filter for specific playback system; And

The data for the particular group for one or more correcting filter of specific playback system are stored in attachment device for displaying audio or for attachment device for displaying audio.

20. attachment device for displaying audios as claimed in claim 19, also comprise:

At least one processor; And

Storage subsystem, is couple to filtering subsystem and this at least one processor,

The particular group wherein applying one or more correcting filter to be included at least one processor in one or more processor digitally processing digital signal.

21. attachment device for displaying audios as described in any one in claim 19 to 20, wherein store the particular group for one or more correcting filter of specific playback system in attachment device for displaying audio or for attachment device for displaying audio or the data for it comprise: the indicating device that the particular group storing one or more correcting filter associates with specific playback system.

22. attachment device for displaying audios as described in any one in claim 19 to 20, wherein attachment device for displaying audio be configured to the instruction that receives on a user interface from user in case realize one or more correcting filter particular group or for its data record, determine and store.

23. attachment device for displaying audios as described in any one in claim 19 to 20, wherein attachment device for displaying audio comprise for by attachment device for displaying audio via the network interface of network-coupled to teleprocessing system, and wherein attachment device for displaying audio for determining that the process of particular group is configured to:

The sound field of record or the data relevant with it are sent to teleprocessing system and can determine particular group to make teleprocessing system, and receive determined particular group or the data for it via network from teleprocessing system.

24. attachment device for displaying audios as claimed in claim 20,

Wherein analytic record is to determine that particular group is performed by this at least one processor.

25. attachment device for displaying audios as described in any one in claim 19 to 20, comprise and make attachment device for displaying audio can operate assembly as portable phone.