TW201538001A - Sound outputting device and equalizer adjusting method - Google Patents

Abstract

A sound outputting device includes a housing; a sound interface module, for receiving a sound input signal; a distance measuring module, for measuring at least one distance between the sound outputting device and at least one reflecting surface on at least one direction; a fuzzy processing module, coupled to the distance measuring module for generating an equalizer indicating signal according to the at least one distance; a sound processing module, for adjusting the sound input signal according to the equalizer indicating signal to generate a sound output signal; and a sound outputting module, for generating sound according to the sound output signal.

Description

Sound output device and equalizer adjustment method thereof

The present invention relates to a sound output device and an equalizer adjustment method thereof, and more particularly to a sound output device capable of adjusting an equalizer setting according to a distance from a reflecting surface, and an equalizer adjusting method thereof.

Generally speaking, in the development and design stage of audio products, the Anechoic Chamber, which is similar to the open space, is used as a standard for adjusting sound quality and sound field. However, due to space constraints, the space and reflection conditions of the audio products in real life are far from the soundless room. If the equalizer setting according to the soundless room is used, the audio products may not be optimal. Sound field and sound quality. For example, when the audio product is playing the sound source signal, the treble and bass in the sound source signal may reflect reverberation, which may cause the user to hear the bass sound pressure is too high or the high sound pressure is too low. . That is to say, the sound quality played by the audio product will vary depending on the space and reflection conditions of the audio product, which may result in a bad user experience.

Therefore, how to adjust the equalizer settings of audio products according to different environmental conditions has become an issue that the industry is eager to explore.

In order to solve the above problems, the present invention provides an acoustic output device capable of adjusting an equalizer setting according to a distance from a reflecting surface, and an equalizer adjusting method thereof.

The invention discloses a sound output device comprising a casing; an audio interface module for receiving an audio input signal; and a distance measuring module for measuring at least one of the sounds At least one distance between the output device and the at least one reflective surface; a blur processing module coupled to the distance measuring module for generating an equalizer indicating signal according to the at least one distance; and an audio processing module The sound input signal is adjusted according to the equalizer indication signal to generate an audio output signal; and an audio output module is configured to generate a sound according to the audio output signal.

The present invention further discloses an equalizer adjustment method for an audio output device, the equalizer adjustment method comprising measuring at least one distance between the sound output device and the at least one reflective surface in at least one direction; Adjusting an audio output signal output by the sound output device at least one distance.

10‧‧‧Sound output device

100‧‧‧ Shell

102‧‧‧Audio interface module

104‧‧‧ Distance measurement module

106‧‧‧Fuzzy Processing Module

108‧‧‧Audio Processing Module

110‧‧‧Sound output module

300‧‧‧Fuzzy interface unit

302‧‧‧ storage unit

304‧‧‧ Fuzzy Judgment Unit

306‧‧‧Processing unit

50‧‧‧ Equalizer adjustment method

500~508‧‧‧Steps

C1~c8‧‧‧ constant

D1~D6‧‧‧Distance

CON‧‧‧ final conclusion

EQ‧‧‧ equalizer indicator signal

EQC, EWQ, EQF‧‧‧ equalizer settings

FTL, FTM, FTR‧‧‧ vague words

LD, MD, RD‧‧ direction

LDD, MDD, RDD‧‧‧ distance

LDP, MDP, RDP‧‧‧ measuring unit

RS1~RS3‧‧‧reflecting surface

SIN‧‧‧ audio input signal

SOUT‧‧‧ audio output signal

SPE‧‧‧Speaker

FIG. 1 is a schematic diagram of a sound output device according to an embodiment of the present invention.

2A and 2B are schematic views showing the position of the sound output device according to the embodiment of the present invention.

FIG. 3 is a schematic diagram of an implementation of the blurring processing module shown in FIG. 1.

Figure 4 is a probability distribution diagram of an embodiment of the present invention.

FIG. 5 is a flowchart of a method for adjusting an equalizer according to an embodiment of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a sound output device 10 according to an embodiment of the present invention. The sound output device 10 can be an audio or a speaker, but is not limited thereto. As shown in FIG. 1 , the sound output device 10 includes a housing 100 , an audio interface module 102 , a distance measurement module 104 , a blur processing module 106 , an audio processing module 108 , and an audio output module . 110. The audio interface module 102 is configured to receive an audio input signal SIN and output the audio input signal SIN to the audio processing module 108. The distance measuring module 104 includes measuring units LDP, MDP, and RDP for measuring the distances LDD, MDD, and RDD between the sound output device 10 and the at least one reflecting surface in the directions LD, MD, and RD. The fuzzy processing module 106 is configured to generate an equalizer indication signal EQ to the audio processing module 108 according to the distances LDD, MDD, and RDD measured by the distance measurement module 104. The audio processing module 108 can adjust the audio input signal SIN according to the equalizer indication signal EQ to generate a Audio output signal SOUT. The sound output module 110 is configured to play a sound to the user to listen according to the audio output signal SOUT. For example, the sound output module 110 can be a speaker array, which can include single or multiple speakers. FIG. 1 only shows two speakers SPE as representatives. According to different applications and design concepts, the sound output module 110 The number of speakers you have can be changed. In this way, the sound output device 10 can adjust the audio input signal SOUT according to the distance from the reflecting surface, so that the sound quality and the sound field conform to the environment space.

In detail, the direction MD is opposite to the playback direction SD of the sound output module 110, and the directions LD and RD are respectively different from the direction MD by an angle φ. For example, the angle φ may be 45°, but is not limited thereto. The measuring units LDP, MDP and RDP can measure the distances LDD, MDD and the distance between the sound output device 10 and the at least one reflecting surface (such as a wall) in the directions LD, MD, RD by means of ultrasonic mode, light wave mode or infrared mode. RDD. For example, please refer to FIG. 2A and FIG. 2B. FIG. 2A and FIG. 2B are schematic diagrams showing the position of the sound output device according to the embodiment of the present invention. As shown in Fig. 2A, the sound output device is disposed in front of the reflecting surface RS1. The measuring units LDP, MDP, and RDP respectively obtain the distances D1, D2, and D3 as the distances LDD, MDD, and RDD. On the other hand, in Fig. 2B, the sound output device is provided at a corner formed by the reflection surfaces RS2 and RS3. The measuring units LDP, MDP, and RDP obtain distances D4, D5, and D6 as distances LDD, MDD, and RDD, respectively. After obtaining the distances LDD, MDD and RDD, the blur processing module 106 can calculate and determine the most suitable equalizer setting according to the measured distances LDD, MDD and RDD, and generate corresponding equalizer indication signals. EQ. The audio processing module 108 adjusts the gain of each frequency band signal in the audio input signal SIN according to the equalizer indication signal EQ to generate the audio output signal SOUT. In this way, the sound output device 10 can adjust the gain of each frequency band signal in the audio input signal SIN according to the environmental conditions in which it is located (ie, adjust the equalizer setting), so that the sound quality and the sound field conform to the environment space.

It should be noted that the distance measuring module 104 is not limited to measuring only the distances LDD, MDD and RDD between the sound output device 10 and the reflecting surface in the directions LD, MD, RD, and can be provided by setting more measuring units. Measuring the distance between the sound output device 10 and the reflecting surface in more directions to take More detailed environmental conditions are used as the basis for adjusting the equalizer settings. For example, the distance measuring module 104 can separately measure the distance between the top of the sound output device 10 and the upper reflecting surface to obtain three-dimensional environmental parameters.

The implementation of the fuzzy processing module 106 can vary depending on the application and design philosophy. For example, please refer to FIG. 3, which is a schematic diagram of an implementation of the blurring processing module 106 shown in FIG. 1. As shown in FIG. 3, the fuzzy processing module 106 includes a blurring interface unit 300, a storage unit 302, a blur determining unit 304, and a processing unit 306. The fuzzification interface unit 300 is configured to generate fuzzy terms FTL, FTM, and FTR corresponding to the directions LD, MD, and RD according to the distances LDD, MDD, and RDD obtained by the distance measurement module 104. Then, the fuzzy determining unit 304 determines and generates at least one conclusion semantic word according to the fuzzy rule stored in the storage unit 302 and the fuzzy semantic terms FTL, FTM, and FTR. Next, the fuzzy determining unit 304 generates and outputs a final conclusion CON to the processing unit 306 according to the obtained at least one conclusion idiom. The processing unit 306 thus determines the optimal equalizer settings based on the final conclusion CON and generates a corresponding equalizer indication signal EQ to the audio processing module 108.

An example of the detailed operational flow of the blurring processing module 106 shown in FIG. 3 is as follows. The fuzzification interface unit 300 converts the distances LDD, MDD, and RDD into fuzzy verbs FTL, FTM, and FTR by the following formula:

Where x is the distance LDD, MDD and RDD obtained by the distance measuring module 104, and c1~c8 are preset constants. Please refer to Fig. 4, and Fig. 4 is a probability distribution diagram obtained according to formulas (1) to (5).

According to the probability distribution diagrams shown in the formulas (1) to (5) and FIG. 4, the blurring interface unit 300 can convert the distances LDD, MDD, and RDD obtained by the measurement module 104 into very near (VeryShort), near Ambiguous terms such as (Short), Medium, Long, and VeryLong, and get the corresponding chances. For example, if the distance LDD is between the constant C2 and the constant C3, the fuzzification interface unit 300 determines the fuzzy linguistic FTL as "near" and its probability is 1 (hereinafter referred to as (near, 1)). On the other hand, if the distance LDD is the average of the constant C3 and the constant C4, the blurring interface unit 300 determines the fuzzy linguistic FTL as (near, 0.5) and (medium, 0.5).

After the fuzzification interface unit 300 converts the distances LDD, MDD, and RDD into the corresponding fuzzy lyrics FTL, FTM, FTR, and probability, the fuzzy determination unit 304 determines whether the fuzzy lexical terms FTL, FTM, and FTR are consistently stored in the storage unit 302. A fuzzy rule in the middle to generate at least one connotation term corresponding to at least one equalizer setting. For example, the fuzzy rule may include: fuzzy rule FR1: If the fuzzy lexical meanings FTL and FTR are both "very close", the conclusion semantics is "corner".

Fuzzy rule FR2: If the fuzzy lexical meanings FTL and FTR are both "medium" and the fuzzy verbs FTM is "near", the conclusion semantics is "by wall".

Fuzzy rule FR3: If the ambiguous words FTL, FTM, and FTR are both "very far", the conclusion is "freestanding".

According to the fuzzy rules FR1 FR FR3, the fuzzy determining unit 304 can obtain conclusion words such as "corner", "by wall", "independent standing" according to the ambiguous words FTL, FTM, and FTR, and obtain corresponding correspondence through the intersection method. Probability. For example, if the fuzzy lexical FTL is (very close, 0.5) and the ambiguous verb FTR is (very close, 0.7), the fuzzy determining unit 304 obtains the conclusion verb as "corner" according to the fuzzy rule FR1, and its probability Is 0.5. Then, the fuzzy determination unit 304 obtains a union of all the connotative semantic words, and outputs it as a final conclusion CON to the processing unit 306. In one embodiment, the final conclusion CON produced by the fuzzy decision unit 304 is (corner, 0.7) ∪ (by wall, 0.3) ∪ (independent standing, 0). Finally, in the processing unit 306, the EQC, the EQW, the EQF, and the final conclusion CON are set according to the equalizers corresponding to the "corner", "by wall", and "independent standing", and the optimum equalizer setting is determined, and accordingly, etc. The indicator indicates the signal EQ. In this way, the audio processing module 108 can adjust the gain of each frequency band signal in the audio input signal SIN according to the equalizer indication signal EQ.

It should be noted that the sound output device described in the above embodiment adjusts the equalizer setting according to the distance between itself and the reflecting surface in different directions, so that the sound quality and the sound field conform to the environment in which the sound output device is located. Depending on the application and design philosophy, those of ordinary skill in the art should be able to implement appropriate changes and modifications.

The manner in which the sound output device 10 adjusts the equalizer settings can be summarized as a first equalizer adjustment method 50, as shown in FIG. The equalizer adjustment method 50 can be used for a sound output device and includes the following steps: Step 500: Start.

Step 502: Determine at least one ambiguous meaning word corresponding to the at least one direction according to the at least one distance.

Step 504: Determine at least one conclusion semantic word corresponding to the at least one equalizer setting according to the at least one fuzzy rule and the at least one ambiguous ideogram.

Step 506: Adjust the audio output signal according to the at least one conclusion language.

Step 508: End.

According to the equalizer adjustment method 50, the sound output device can adjust the equalizer settings according to the environmental conditions of the environment, so that the sound quality and the sound field conform to the environmental space. For the detailed operation process of the equalizer adjustment method 50, reference may be made to the above, and for brevity, it will not be described herein.

In summary, the sound output device and the equalizer adjustment method disclosed in the above embodiments can adjust the equalizer settings according to the environmental conditions of the environment. Regardless of where the user places the sound output device, the sound output device can change the equalizer settings to provide a good listening experience.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧Sound output device

100‧‧‧ Shell

102‧‧‧Audio interface module

104‧‧‧ Distance measurement module

106‧‧‧Fuzzy Processing Module

108‧‧‧Audio Processing Module

110‧‧‧Sound output module

EQ‧‧‧ equalizer indicator signal

LD, MD, RD‧‧ direction

LDP, MDP, RDP‧‧‧ measuring unit

SIN‧‧‧ audio input signal

SOUT‧‧‧ audio output signal

SPE‧‧‧Speaker

Claims (12)

An audio output device includes: a housing; an audio interface module for receiving an audio input signal; and a distance measuring module for measuring at least one of the sound output device and the at least one reflective surface At least one distance; a blur processing module coupled to the distance measuring module for generating an equalizer indicating signal according to the at least one distance; and an audio processing module for indicating according to the equalizer Signal, adjusting the audio input signal to generate an audio output signal; and a sound output module for generating a sound according to the audio output signal. The sound output device of claim 1, wherein the blurring processing module comprises: a blurring interface unit, configured to generate at least one ambiguous meaning word corresponding to the at least one direction according to the at least one distance; a unit for storing at least one fuzzy rule; a fuzzy determining unit coupled to the fuzzy interface unit and the storage unit, configured to generate, according to the at least one fuzzy grammar and the at least one fuzzy rule, corresponding to being stored in the At least one conclusion vocabulary set by at least one equalizer of the audio processing module; and a processing unit configured to generate the equalizer indication signal according to the at least one conclusion linguistic. The sound output device of claim 1, wherein the distance measuring module comprises: a first distance measuring unit for measuring between the sound output device and a first reflecting surface in a first direction a first distance measuring unit, configured to measure a second distance between the sound output device and a second reflecting surface in a second direction; a third distance measuring unit, To measure the sound output device and a third A third distance between the three reflecting surfaces. The sound output device of claim 1, wherein the distance measuring module measures the at least one distance in an ultrasonic manner. The sound output device of claim 1, wherein the distance measuring module measures the at least one distance in a light wave manner. The sound output device of claim 1, wherein the distance measuring module measures the at least one distance in an infrared manner. An equalizer adjustment method for an audio output device, the method includes: measuring at least one distance between the sound output device and the at least one reflective surface in at least one direction; and according to the at least one distance And adjusting an audio input signal received by the sound output device. The equalizer adjustment method of claim 7, wherein the step of adjusting the audio input signal received by the sound output device according to the at least one distance comprises: determining, according to the at least one distance, corresponding to the at least one direction At least one vague ideogram; determining at least one connotation term corresponding to at least one equalizer stored in the audio processing module according to the at least one fuzzy rule and the at least one vague ideogram; and according to the at least one conclusion The vocabulary is used to adjust the audio output signal. The equalizer adjustment method of claim 7, wherein the measuring the at least one distance between the sound output device and the at least one reflective surface comprises: measuring in a first direction a second direction and a third distance between the sound output device and a first reflective surface, a first distance, a second distance, and a third distance. The equalizer adjustment method of claim 7, wherein the measuring the at least one distance between the sound output device and the at least one reflecting surface in the at least one direction comprises: using an ultrasonic method, measuring The at least one of the at least one distance between the sound output device and the at least one reflective surface. The equalizer adjustment method of claim 7, wherein the sound is measured in the at least one direction The step of the at least one distance between the output device and the at least one reflective surface includes measuring, by the optical wave method, the at least one distance between the at least one upward sound output device and the at least one reflective surface. The equalizer adjustment method of claim 7, wherein the measuring the at least one distance between the at least one upward sound output device and the at least one reflective surface comprises: measuring by using an infrared method At least one of the at least one distance between the sound output device and the at least one reflective surface.