Audio playing method, playing device, test device and audio playing system

Abstract

The invention relates to the technical field of spatial audio, and discloses an audio playing method, playing equipment, test equipment and an audio playing system, the method is applied to the playing equipment in the audio playing system, and the audio playing system further comprises the test equipment. The test device can generate the test audio in the horizontal direction and the test audio in the vertical direction according to the related transfer function of the to-be-tested head, and then the test audio and the test audio are played to the evaluation object through the playing device. The test device receives a horizontal listening and distinguishing result of the test audio in the horizontal direction and a vertical listening and distinguishing result of the test audio in the vertical direction by the evaluation object, and performs quality evaluation on the related transfer function of the to-be-tested head according to the results, so as to obtain a related transfer function of a target head; and transmitting the target head-related transfer function to a playing device, and performing audio playing by the playing device through the target head-related transfer function. Therefore, when the playing equipment performs audio playing, the quality of the HRTF adopted by the playing equipment is relatively good.

Description

Technical Field

[0001] The present application relates to the field of spatial audio technology, and in particular to an audio playback method, a playback device, a testing device, and an audio playback system. Background Art

[0002] At present, the Head-Related Transfer Function (HRTF) describes the transmission process of sound waves from the sound source to the ears. It can simulate the propagation and positioning of sound in space and create an immersive auditory experience for users.

[0003] In order to play spatial audio, existing playback devices (such as headphones, etc.) generally have HRTF inside, and play it through HRTF. The HRTF is generally generated by recording the spatial audio through a universal human head first, and then the HRTF is stored in the playback device. When used, the spatial audio can be played through the HRTF. However, due to factors such as different recording environments and different universal human heads used, the quality of the HRTF obtained will be uneven. Therefore, how to choose a better quality HRTF for audio playback is a problem that needs to be solved urgently. Summary of the invention

[0004] The main purpose of this application is to provide an audio playback method, a playback device, a test device and an audio playback system, aiming to solve the technical problem of how to select a HRTF with better quality for audio playback in the prior art.

[0005] To achieve the above object, the present application provides an audio playback method, which is applied to a playback device in an audio playback system, wherein the audio playback system also includes a test device, and the method includes:

[0006] receiving a target head-related transfer function sent by the test device, and performing audio playback through the target head-related transfer function;

[0007] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0008] In one embodiment, before the step of receiving the target head-related transfer function sent by the test device, the method further includes:

[0009] Receiving a horizontal test audio and a vertical test audio generated by the test device according to the transfer function related to the head to be tested;

[0010] Playing the horizontal test audio so that the test device obtains the horizontal hearing discrimination result generated by the test subject according to the horizontal test audio;

[0011] The vertical test audio is played so that the test device obtains the vertical hearing distinction result generated by the test subject according to the vertical test audio.

[0012] In addition, to achieve the above-mentioned purpose, the present application provides an audio playback method, the method is applied to a test device in an audio playback system, the audio playback system also includes a playback device, the method includes:

[0013] transmitting the target head-related transfer function to the playback device, so that the playback device plays audio through the target head-related transfer function;

[0014] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0015] In one embodiment, before the step of transmitting the target HRT function to the playback device, the method further includes:

[0016] Acquire a transfer function related to the head to be tested, and generate a test audio in the horizontal direction and a test audio in the vertical direction according to the transfer function related to the head to be tested;

[0017] Transmitting the horizontal test audio and the vertical test audio to the playback device, so that the playback device plays the horizontal test audio and the vertical test audio;

[0018] Receiving a horizontal hearing distinction result generated by the subject of evaluation according to the test audio in the horizontal direction, and receiving a vertical hearing distinction result generated by the subject of evaluation according to the test audio in the vertical direction;

[0019] The quality of the head-related transfer function to be tested is evaluated according to the horizontal hearing distinction result and the vertical hearing distinction result to obtain a target head-related transfer function.

[0020] In one embodiment, the step of generating a horizontal test audio and a vertical test audio according to the head-related transfer function to be tested comprises:

[0021] Determine the horizontal test sound source position according to the horizontal test plate, and determine the vertical test sound source position according to the vertical test plate;

[0022] A test audio in the horizontal direction is generated through the head-related transfer function to be tested based on the horizontal test sound source position, and a test audio in the vertical direction is generated through the head-related transfer function to be tested based on the vertical test sound source position.

[0023] In one embodiment, the step of performing quality evaluation on the head-related transfer function to be tested according to the horizontal audio discrimination result and the vertical audio discrimination result comprises:

[0024] Determine the horizontal listening accuracy rate according to the horizontal listening results, and determine the vertical listening accuracy rate according to the vertical listening results;

[0025] The quality of the head-related transfer function to be tested is evaluated based on the horizontal hearing discrimination accuracy and the vertical hearing discrimination accuracy.

[0026] In one embodiment, the step of determining the horizontal listening accuracy rate according to the horizontal listening results and determining the vertical listening accuracy rate according to the vertical listening results includes:

[0027] Determine whether the horizontal listening result is within a preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first determination result;

[0028] Determining the horizontal listening accuracy rate according to the first judgment result;

[0029] Determine whether the vertical listening result is within a preset vertical listening position range corresponding to the horizontal test sound source position, and generate a second determination result;

[0030] The vertical hearing discrimination accuracy is determined according to the second judgment result.

[0031] In addition, to achieve the above-mentioned purpose, the present application also proposes a playback device, the playback device comprising:

[0032] An audio playback module, used for receiving a target head-related transfer function sent by a test device, and playing audio through the target head-related transfer function;

[0033] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0034] In addition, to achieve the above purpose, the present application also proposes a testing device, the testing device comprising:

[0035] A transmission module, used for transmitting the target head-related transfer function to a playback device, so that the playback device plays audio through the target head-related transfer function;

[0036] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes an audio playback system, which includes the playback device as described above and the testing device as described above.

[0038] The present application provides an audio playback method, a playback device, a test device and an audio playback system. The method is applied to a playback device in an audio playback system. The audio playback system also includes a test device. The method includes: receiving a target head-related transfer function sent by the test device, and performing audio playback through the target head-related transfer function; wherein the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to a horizontal listening result and a vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested. Since the test device in the present application can first generate horizontal test audio and vertical test audio according to the head-related transfer function to be tested, and then play them to the evaluation object through the playback device, the test device receives the horizontal hearing recognition result of the horizontal test audio and the vertical hearing recognition result of the vertical test audio from the evaluation object, and performs quality evaluation on the head-related transfer function to be tested according to the horizontal hearing recognition result and the vertical hearing recognition result, thereby obtaining the target head-related transfer function, and then transmitting the target head-related transfer function to the playback device, and the playback device plays audio through the target head-related transfer function. Therefore, when the playback device plays audio, the HRTF quality used is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 This is a flowchart of the first embodiment of the audio playback method of the present application;

[0042] Figure 2 This is a flow chart of obtaining the target head-related transfer function in the first embodiment of the audio playback method of the present application;

[0043] Figure 3 This is a structural schematic diagram of a horizontal test disk in the first embodiment of the audio playback method of the present application;

[0044] Figure 4 This is a schematic diagram of the structure of a vertical test disk in the first embodiment of the audio playback method of the present application;

[0045] Figure 5 This is a flow chart of the second embodiment of the audio playback method of the present application;

[0046] Figure 6 This is a structural block diagram of the first embodiment of the playback device of this application;

[0047] Figure 7 This is a structural block diagram of the first embodiment of the testing device of the present application.

[0048] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] It should be noted that, at present, the Head-Related Transfer Function (HRTF) describes the transmission process of sound waves from the sound source to the ears, which can simulate the propagation and positioning of sound in space and create an immersive auditory experience for users.

[0051] In order to play spatial audio, existing playback devices (such as headphones, etc.) generally have HRTF inside, and play it through HRTF. The HRTF is generally generated by recording the spatial audio through a universal human head first, and then the HRTF is stored in the playback device. When used, the spatial audio can be played through the HRTF. However, due to factors such as different recording environments and different universal human heads used, the quality of the HRTF obtained will be uneven. Therefore, how to choose a better quality HRTF for audio playback is a problem that needs to be solved urgently.

[0052] In order to solve the above defects, the present embodiment provides an audio playback method, which is applied to a playback device in an audio playback system, and the audio playback system also includes a test device. In the present embodiment, the test device can first generate a horizontal test audio and a vertical test audio according to the head-related transfer function to be tested, and then play them to the evaluation object through the playback device. The test device receives the horizontal hearing results of the horizontal test audio and the vertical hearing results of the vertical test audio from the evaluation object, and performs a quality evaluation on the head-related transfer function to be tested according to the horizontal hearing results and the vertical hearing results, thereby obtaining a target head-related transfer function, and then transmits the target head-related transfer function to the playback device, and the playback device plays audio through the target head-related transfer function. As a result, the HRTF quality used by the playback device is better when playing audio.

[0053] For ease of understanding, the following combination Figures 1 to 7 The audio playback method provided in the embodiment of the present application and the headphones provided in the following embodiment are specifically introduced.

[0054] The present application embodiment provides an audio playback method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the audio playback method of the present application. Figure 1 As shown, in this embodiment, the above method can be applied to a playback device in an audio playback system, and the audio playback system also includes a test device.

[0055] It should be noted that the audio playback method provided in the embodiment of the present application can be applied to the scenario of selecting a HRTF with better quality for audio playback. The above-mentioned playback device can be a device for spatial audio playback, such as headphones or other devices with speakers, etc., which is not limited in this embodiment. The above-mentioned test device can be a device for quality evaluation of HRTF, such as a computer, etc., which is also not limited in this embodiment. In this embodiment, when performing HRTF quality evaluation, the test device and the playback device can be connected. When a HRTF with better quality is selected after the evaluation is completed, the test device can transmit the HRTF to the playback device, and the playback device can play the spatial audio through the HRTF. And after the playback device receives the HRTF, it can play the spatial audio independently without the test device, that is, it does not need to be connected to the test device.

[0056] In this embodiment, the method includes:

[0057] Step S20: receiving the target head-related transfer function sent by the test device, and playing audio through the target head-related transfer function;

[0058] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0059] It is understandable that the executor of the method of this embodiment can be an audio playback device with audio playback, data processing and program running functions, such as the above-mentioned headphones, etc., and of course it can also be other devices that realize the same or similar functions. This embodiment is not limited to this. This embodiment is illustrated with the above-mentioned playback device.

[0060] It should be understood that the target HRTF may be a HRTF with better quality selected by the test device. In this embodiment, before the playback device plays audio, the HRTF with better quality needs to be selected by the test device. The better quality may specifically refer to a higher spatial audio playback effect, that is, the audio is played at a more precise position. This is because when different HRTFs are recorded, the quality of the obtained HRTFs may be uneven due to the different recording environments or the universal human heads used. Therefore, it is necessary to select a HRTF with higher spatial audio playback effect as the target HRTF for the playback device to use.

[0061] The head-related transfer function to be tested is a head-related transfer function that needs to be quality evaluated. When the evaluation result of the head-related transfer function to be tested meets the preset evaluation requirements, the head-related transfer function to be tested can be used as the upper target head-related transfer function.

[0062] In order to obtain the above target head related transfer function, refer to Figure 2 , Figure 2 This is a flow chart of obtaining the target head-related transfer function in the first embodiment of the audio playback method of the present application, as shown in FIG. Figure 2As shown, in this embodiment, before the playback device receives the target head-related transfer function, the test device can obtain the head-related transfer function to be tested, and generate a test audio in the horizontal direction and a test audio in the vertical direction according to the head-related transfer function to be tested; transmit the test audio in the horizontal direction and the test audio in the vertical direction to the playback device, so that the playback device plays the test audio in the horizontal direction and the test audio in the vertical direction; receive the horizontal listening result generated by the evaluation object according to the horizontal test audio, and receive the vertical listening result generated by the evaluation object according to the vertical test audio; perform quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result to obtain the target head-related transfer function.

[0063] like Figure 2 As shown, a spatial audio algorithm can be set in the test device first, and the above-mentioned head-related transfer function to be tested (ie, Figure 2 The algorithm loads the head transfer function (HRTF).

[0064] After the test device has loaded the head-related transfer function to be tested, a set of spatial audio virtual speakers can be generated according to the loaded head-related transfer function to be tested by the spatial audio algorithm, and then the horizontal test audio and the vertical test audio can be generated according to the head-related transfer function to be tested. This is because the spatial audio can make the listener have a three-dimensional sense of direction. Therefore, this embodiment can be divided into two aspects, horizontal and vertical directions, to evaluate the quality of the head-related transfer function to be tested. The horizontal test audio can be the spatial audio for quality evaluation based on the horizontal plane direction, and the vertical test audio can be the spatial audio for quality evaluation perpendicular to the horizontal plane direction.

[0065] The above-mentioned evaluation object can be an object for quality evaluation, which can be a real person or a device for evaluation. After the test device obtains the test audio in the horizontal direction and the test audio in the vertical direction, it can be transmitted to the playback device, and the playback device plays them respectively. The evaluation object listens to the test audio in the horizontal direction and generates a corresponding horizontal hearing result, listens to the test audio in the vertical direction, and generates a corresponding vertical hearing result. The evaluation object also feeds back the horizontal hearing result and the vertical hearing result to the test device. The test device then performs a quality evaluation on the current head-related transfer function to be tested based on the horizontal hearing result and the vertical hearing result, and obtains the target head-related transfer function.

[0066] After the target HRTF is obtained, the target HRTF can be transmitted to the playback device (i.e. Figure 2Similarly, the playback device can also have a preset spatial audio algorithm (i.e. Figure 2 The spatial audio algorithm is developed in the process of generating a virtualized loudspeaker (i.e., Figure 2 Virtual speakers are generated in various directions. When spatial audio to be played is received, it can be played through each virtual speaker, thereby simulating the effect of three-dimensional directionality (i.e. Figure 2 (medium spatial audio effect).

[0067] Further, in order to enable the test device to generate the test audio in the horizontal direction and the test audio in the vertical direction, in this embodiment, when the test device generates the test audio in the horizontal direction and the test audio in the vertical direction according to the head-related transfer function to be tested, the specific process is as follows:

[0068] Determine the horizontal test sound source position according to the horizontal test plate, and determine the vertical test sound source position according to the vertical test plate;

[0069] A test audio in the horizontal direction is generated through the head-related transfer function to be tested based on the horizontal test sound source position, and a test audio in the vertical direction is generated through the head-related transfer function to be tested based on the vertical test sound source position.

[0070] It should be noted that the horizontal test disc may be a test disc for evaluating the quality of the transfer function of the head under test in the horizontal direction, and the vertical test disc may be a test disc for evaluating the quality of the transfer function of the head under test in the vertical direction. The horizontal test sound source position may be a sound point selected on the horizontal test disc for horizontal direction testing, and the vertical test sound source position may be a sound point selected on the vertical test disc for vertical direction testing.

[0071] For ease of understanding, refer to Figure 3 as well as Figure 4 To explain, Figure 3 This is a schematic diagram of the structure of the horizontal test disk in the first embodiment of the audio playback method of this application. Figure 4 This is a schematic diagram of the structure of a vertical test disk in the first embodiment of the audio playback method of the present application;

[0072] like Figure 3 As shown, since there is space for all angles in the horizontal direction for the listener, the range can be set to 0° to 360° when testing the playback quality in the horizontal direction in this embodiment. The test device can set the sound source position from the horizontal test disk as the above-mentioned horizontal test sound source position (i.e. Figure 2 The sound source is generated at the horizontal angle. Figure 4As shown, for the listener, there is not space at all angles in the vertical direction, that is, the space below the head is occupied by the body. Therefore, when testing the playback quality in the vertical direction, the range of this embodiment can be set to 330° to 0° and 0° to 210°. Of course, other degrees can also be set, and this embodiment does not limit this. The test equipment can set the sound point from the vertical test plate as the vertical test sound source position (i.e. Figure 2 The sound source is generated at a vertical angle in the middle).

[0073] It should be emphasized that in this embodiment, when setting the horizontal test plate and the vertical test plate, the center is the test object, that is, Figure 3 as well as Figure 4 The O point in the figure is taken as the evaluation object, and the horizontal test sound source position and the vertical test sound source position are selected according to a certain radius. The specific radius can be set according to the actual situation, and this embodiment does not limit this.

[0074] For example, the horizontal test sound source position selected according to a certain radius can be Figure 3 A1 and A2 positions; for example, the vertical test sound source position selected according to a certain radius can be Figure 4 In the B1 and B2 positions.

[0075] It should also be emphasized that in this embodiment, of course, all angles can be used as sound source positions. Therefore, the number of selected horizontal test sound source positions and vertical test sound source positions can be set according to actual conditions, and this embodiment does not impose any restrictions on this.

[0076] After determining the horizontal test sound source position and the vertical test sound source position, the test device can generate horizontal test audio based on the horizontal test sound source position through the test head related transfer function, and generate vertical test audio based on the vertical test sound source position through the test head related transfer function, and transmit them to the playback device for playback.

[0077] Furthermore, in order to enable the test device to obtain horizontal hearing discrimination results and vertical hearing discrimination results, in this embodiment, before the step of receiving the target head-related transfer function sent by the test device, the step further includes:

[0078] Receiving a horizontal test audio and a vertical test audio generated by the test device according to the transfer function related to the head to be tested;

[0079] Playing the horizontal test audio so that the test device obtains the horizontal hearing discrimination result generated by the test subject according to the horizontal test audio;

[0080] The vertical test audio is played so that the test device obtains the vertical hearing distinction result generated by the test subject according to the vertical test audio.

[0081] In actual use, the evaluation subject can wear the playback device, and when the playback device receives the horizontal test audio, it plays it. The evaluation subject can select the location of the sound source heard on the horizontal test disk according to the horizontal test audio heard, as the above-mentioned horizontal listening result; when the playback device receives the vertical test audio, it plays it. The evaluation subject can select the location of the sound source heard on the vertical test disk according to the vertical test audio heard, as the above-mentioned vertical listening result (i.e. Figure 2 (the direction from which the sound source comes).

[0082] Exemplarily, when the above-mentioned evaluation object is a certain evaluation device (such as an artificial head with a microphone), this embodiment can be provided with a hearing recognition program in the evaluation object, and a microphone can be provided on the evaluation object, and the hearing recognition program can be run through the evaluation object, and when the above-mentioned horizontal test audio or vertical test audio is heard through the microphone, the corresponding sound source position can be identified through the hearing recognition program as a horizontal hearing recognition result or a vertical hearing recognition result, and the result can be fed back to the test device. The above-mentioned specific evaluation object and hearing recognition program can be set according to actual conditions, and this embodiment does not limit this;

[0083] When the above-mentioned evaluation object is a real person (hereinafter referred to as the tester), this embodiment allows the tester to wear the above-mentioned playback device. When the tester listens to the horizontal test audio or the vertical test audio, he can click on the display screen of the test device. The display screen can display a horizontal test disk and a vertical test disk. The tester can click a certain point on the horizontal test disk or the vertical test disk as the sound source position identified by the tester, so that the test device can obtain horizontal hearing recognition results and vertical hearing recognition results.

[0084] Furthermore, in order to perform quality evaluation, in this embodiment, after the test device obtains the horizontal hearing recognition result and the vertical hearing recognition result, the quality evaluation can be performed according to the result (ie Figure 2 The specific process is as follows:

[0085] Determine the horizontal listening accuracy rate according to the horizontal listening results, and determine the vertical listening accuracy rate according to the vertical listening results;

[0086] The quality of the head-related transfer function to be tested is evaluated based on the horizontal hearing discrimination accuracy and the vertical hearing discrimination accuracy.

[0087] It can be understood that the above-mentioned horizontal hearing accuracy rate can be the percentage of the number of times the evaluation subject successfully distinguishes the test audio in the horizontal direction to the total number of test audio in the horizontal direction, and the vertical hearing accuracy rate can be the percentage of the number of times the evaluation subject successfully distinguishes the test audio in the vertical direction to the total number of test audio in the vertical direction.

[0088] For example, based on Figure 3 If the current horizontal test audio is the audio emitted by point A1, when the horizontal hearing result of the test object is not the A1 point, it is judged that the hearing has failed; if it is the A1 point, it can be judged that the hearing has succeeded.

[0089] After obtaining the horizontal and vertical hearing accuracy rates, the quality evaluation of the head-related transfer function to be tested can be performed based on the accuracy rates. Specifically, the horizontal hearing accuracy rate can reach a certain preset horizontal hearing accuracy rate threshold (i.e. Figure 2 When the vertical hearing accuracy reaches a certain preset vertical hearing accuracy threshold (i.e. Figure 2 By performing vertical HRTF screening), the head-related transfer function to be tested can be determined as a head-related transfer function with better quality and used as the target head-related transfer function.

[0090] As another implementation method, the present embodiment may further set up multiple evaluation objects, and obtain the horizontal hearing discrimination accuracy and vertical hearing discrimination accuracy of each evaluation object for the head-related transfer function to be tested, respectively, calculate the average level hearing discrimination accuracy based on each horizontal hearing discrimination accuracy, calculate the average vertical hearing discrimination accuracy based on each vertical hearing discrimination accuracy, and then determine whether the average level hearing discrimination accuracy reaches a preset horizontal hearing discrimination accuracy threshold, and whether the vertical hearing discrimination accuracy reaches a preset vertical hearing discrimination accuracy threshold.

[0091] As another implementation method, when it is necessary to compare the qualities of the transfer functions associated with the heads to be tested, the transfer functions associated with the heads to be tested can be sorted according to the horizontal and vertical hearing accuracy rates mentioned above, and the horizontal and vertical rankings can be obtained respectively. Then, a comprehensive ranking can be calculated based on the horizontal and vertical rankings. The higher the ranking, the better the comprehensive quality of the transfer functions associated with the heads to be tested.

[0092] Similarly, if you only need to pay attention to the horizontal quality or the vertical quality, you only need to pay attention to the horizontal ranking or the vertical ranking. The higher the ranking, the better the horizontal or vertical quality of the transfer function of the head under test.

[0093] Furthermore, considering that it may lead to poor evaluation effect if the position that the evaluation object listens to is determined to be correct only when the position is the corresponding sound source position, in this embodiment, when the test device determines the horizontal listening accuracy rate according to the horizontal listening result, and determines the vertical listening accuracy rate according to the vertical listening result, the specific process is as follows:

[0094] Determine whether the horizontal listening result is within a preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first determination result;

[0095] Determining the horizontal listening accuracy rate according to the first judgment result;

[0096] Determine whether the vertical listening result is within a preset vertical listening position range corresponding to the horizontal test sound source position, and generate a second determination result;

[0097] The vertical hearing discrimination accuracy is determined according to the second judgment result.

[0098] It should be noted that the above-mentioned preset horizontal hearing position range may be a preset range for determining horizontal hearing to be correct, and the above-mentioned preset vertical hearing range may be a preset range for determining vertical hearing to be correct.

[0099] The test device of this embodiment can generate a preset range for each test sound source position in advance. Figure 3 as well as Figure 4 To explain, Figure 3 For the horizontal test sound source position A1, the horizontal listening position range corresponding to A1 can be a certain distance on both sides of A1 on the horizontal test plate (i.e. Figure 3 If the selected point is within this range, it can be judged as correct.

[0100] Therefore, in actual use, the test equipment can determine whether the horizontal listening result is located in the preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first judgment result, and then calculate the horizontal listening accuracy based on the first judgment result; similarly, the test equipment can determine whether the vertical listening result is located in the preset vertical listening position range corresponding to the vertical test sound source position, and generate a second judgment result, and then calculate the vertical listening accuracy based on the second judgment result.

[0101] It should be emphasized that the preset listening position ranges corresponding to the above-mentioned positions can be set according to different needs. If more stringent quality requirements are required in the horizontal direction, the preset horizontal listening position range can be set smaller. If more stringent quality requirements are required in the vertical direction, the preset vertical listening position range can be set smaller.

[0102] It should also be emphasized that in order to further improve the accuracy, in this embodiment, different accuracy weights can be set for different positions within the above-mentioned preset listening position range, and the closer to the test sound source position, the higher the accuracy weight. Then, when calculating the listening accuracy, the accuracy weight can be combined for calculation to further improve the accuracy.

[0103] For example, based on Figure 3 As shown, in this embodiment, within the range between A1'A1", the closer the point is to the A1 position, the higher the accuracy weight is set. Specifically, it can be set to 0% outside A1'A1" and increase successively until the A1 point is 100%. If the point selected by the evaluation object is closer to the A1 point, it can also indicate that the result is more accurate and the obtained accuracy is higher.

[0104] In this embodiment, the test device can first generate horizontal test audio and vertical test audio according to the head-related transfer function to be tested, and then play them to the evaluation object through the playback device, the test device receives the horizontal hearing recognition result of the horizontal test audio and the vertical hearing recognition result of the vertical test audio from the evaluation object, and performs quality evaluation on the head-related transfer function to be tested according to the horizontal hearing recognition result and the vertical hearing recognition result, thereby obtaining the target head-related transfer function, and then transmits the target head-related transfer function to the playback device, and the playback device plays audio through the target head-related transfer function. Therefore, when the playback device plays audio, the HRTF used has better quality.

[0105] In addition, to achieve the above purpose, the present application embodiment also provides an audio playback method, referring to Figure 5 , Figure 5 This is a flowchart diagram of the second embodiment of the audio playing method of the present application.

[0106] In this embodiment, the above method can be applied to a test device in an audio playback system, the audio playback system also includes a playback device, and the method includes:

[0107] Step S10: transmitting the target head-related transfer function to the playback device, so that the playback device plays audio through the target head-related transfer function;

[0108] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0109] Furthermore, before the step of transmitting the target HRF to the playback device, the step further includes:

[0110] Acquire a transfer function related to the head to be tested, and generate a test audio in the horizontal direction and a test audio in the vertical direction according to the transfer function related to the head to be tested;

[0111] Transmitting the horizontal test audio and the vertical test audio to the playback device, so that the playback device plays the horizontal test audio and the vertical test audio;

[0112] Receiving a horizontal hearing distinction result generated by the subject of evaluation according to the test audio in the horizontal direction, and receiving a vertical hearing distinction result generated by the subject of evaluation according to the test audio in the vertical direction;

[0113] The quality of the head-related transfer function to be tested is evaluated according to the horizontal hearing distinction result and the vertical hearing distinction result to obtain a target head-related transfer function.

[0114] Further, the step of generating the test audio in the horizontal direction and the test audio in the vertical direction according to the head-related transfer function to be tested comprises:

[0115] Determine the horizontal test sound source position according to the horizontal test plate, and determine the vertical test sound source position according to the vertical test plate;

[0116] A test audio in the horizontal direction is generated through the head-related transfer function to be tested based on the horizontal test sound source position, and a test audio in the vertical direction is generated through the head-related transfer function to be tested based on the vertical test sound source position.

[0117] Furthermore, the step of performing quality evaluation on the head-related transfer function to be tested according to the horizontal audio discrimination result and the vertical audio discrimination result includes:

[0118] Determine the horizontal listening accuracy rate according to the horizontal listening results, and determine the vertical listening accuracy rate according to the vertical listening results;

[0119] The quality of the head-related transfer function to be tested is evaluated based on the horizontal hearing discrimination accuracy and the vertical hearing discrimination accuracy.

[0120] Furthermore, the step of determining the horizontal listening accuracy rate according to the horizontal listening result, and determining the vertical listening accuracy rate according to the vertical listening result, comprises:

[0121] Determine whether the horizontal listening result is within a preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first determination result;

[0122] Determining the horizontal listening accuracy rate according to the first judgment result;

[0123] Determine whether the vertical listening result is within a preset vertical listening position range corresponding to the horizontal test sound source position, and generate a second determination result;

[0124] The vertical hearing discrimination accuracy is determined according to the second judgment result.

[0125] In this embodiment, the test device can first generate horizontal test audio and vertical test audio according to the head-related transfer function to be tested, and then play them to the evaluation object through the playback device, the test device receives the horizontal hearing recognition result of the horizontal test audio and the vertical hearing recognition result of the vertical test audio from the evaluation object, and performs quality evaluation on the head-related transfer function to be tested according to the horizontal hearing recognition result and the vertical hearing recognition result, thereby obtaining the target head-related transfer function, and then transmits the target head-related transfer function to the playback device, and the playback device plays audio through the target head-related transfer function. Therefore, when the playback device plays audio, the HRTF used has better quality.

[0126] It should be noted that the specific implementation of the audio playback method applied to the test device in the present application can refer to the specific implementation of the audio playback method applied to the playback device mentioned above, which will not be repeated here.

[0127] In addition, to achieve the above purpose, this embodiment also provides a playback device, referring to Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the playback device of this application.

[0128] like Figure 6 As shown, in this embodiment, the playback device includes:

[0129] An audio playing module 601 is used to receive a target head-related transfer function sent by a test device, and to play audio through the target head-related transfer function;

[0130] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0131] In this embodiment, the test device can first generate horizontal test audio and vertical test audio according to the head-related transfer function to be tested, and then play them to the evaluation object through the playback device, the test device receives the horizontal hearing recognition result of the horizontal test audio and the vertical hearing recognition result of the vertical test audio from the evaluation object, and performs quality evaluation on the head-related transfer function to be tested according to the horizontal hearing recognition result and the vertical hearing recognition result, thereby obtaining the target head-related transfer function, and then transmits the target head-related transfer function to the playback device, and the playback device plays audio through the target head-related transfer function. Therefore, when the playback device plays audio, the HRTF used has better quality.

[0132] As an embodiment, the audio playback module 601 is also used to receive the horizontal test audio and the vertical test audio generated by the test device according to the test head related transfer function; play the horizontal test audio so that the test device obtains the horizontal hearing result generated by the evaluation object according to the horizontal test audio; play the vertical test audio so that the test device obtains the vertical hearing result generated by the evaluation object according to the vertical test audio.

[0133] Other embodiments or specific implementations of the playback device of the present application can refer to the above-mentioned method embodiments and will not be described in detail here.

[0134] In addition, to achieve the above purpose, this embodiment also provides a test device, referring to Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the testing device of the present application.

[0135] like Figure 7 As shown, in this embodiment, the playback device includes:

[0136] A transmission module 701 is used to transmit the target head-related transfer function to a playback device, so that the playback device plays audio through the target head-related transfer function;

[0137] Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

[0138] As an implementation mode, the transmission module 701 is also used to obtain the head-related transfer function to be tested, and generate a test audio in the horizontal direction and a test audio in the vertical direction according to the head-related transfer function to be tested; transmit the test audio in the horizontal direction and the test audio in the vertical direction to the playback device, so that the playback device plays the test audio in the horizontal direction and the test audio in the vertical direction; receive a horizontal listening result generated by the evaluation object according to the horizontal test audio, and receive a vertical listening result generated by the evaluation object according to the vertical test audio; perform a quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result to obtain a target head-related transfer function.

[0139] As an implementation mode, the transmission module 701 is further used to determine the horizontal test sound source position according to the horizontal test disk, and determine the vertical test sound source position according to the vertical test disk; generate the test audio in the horizontal direction based on the horizontal test sound source position through the test head related transfer function, and generate the test audio in the vertical direction based on the vertical test sound source position through the test head related transfer function.

[0140] As an implementation manner, the transmission module 701 is further used to determine a horizontal hearing recognition accuracy rate according to the horizontal hearing recognition result, and to determine a vertical hearing recognition accuracy rate according to the vertical hearing recognition result; and to perform a quality evaluation on the head-related transfer function to be tested based on the horizontal hearing recognition accuracy rate and the vertical hearing recognition accuracy rate.

[0141] As an implementation mode, the transmission module 701 is also used to determine whether the horizontal listening result is within a preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first judgment result; determine the horizontal listening accuracy rate based on the first judgment result; determine whether the vertical listening result is within a preset vertical listening position range corresponding to the horizontal test sound source position, and generate a second judgment result; determine the vertical listening accuracy rate based on the second judgment result.

[0142] Other embodiments or specific implementations of the testing device of the present application can refer to the above-mentioned method embodiments and will not be described in detail here.

[0143] In addition, to achieve the above purpose, this embodiment further proposes an audio playback system, which includes the playback device as described above and the test device as described above, and the test device is connected to the playback device.

[0144] Other embodiments or specific implementations of the audio playback system of the present application can refer to the above-mentioned method embodiments and will not be described in detail here.

[0145] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0146] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0147] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0148] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An audio playback method, characterized in that: The method is applied to a playback device in an audio playback system, the audio playback system further comprising a test device, and the method comprises: receiving a target head-related transfer function sent by the test device, and performing audio playback through the target head-related transfer function; Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

2. The method according to claim 1, characterized in that Before the step of receiving the target head related transfer function sent by the test device, the method further includes: Receiving a horizontal test audio and a vertical test audio generated by the test device according to the transfer function related to the head to be tested; Playing the horizontal test audio so that the test device obtains the horizontal hearing discrimination result generated by the test subject according to the horizontal test audio; The vertical test audio is played so that the test device obtains the vertical hearing distinction result generated by the test subject according to the vertical test audio.

3. An audio playback method, characterized in that: The method is applied to a test device in an audio playback system, the audio playback system further comprising a playback device, and the method comprises: transmitting the target head-related transfer function to the playback device, so that the playback device plays audio through the target head-related transfer function; Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

4. The method according to claim 3, characterized in that Before the step of transmitting the target HRT function to the playback device, the method further includes: Acquire a transfer function related to the head to be tested, and generate a test audio in the horizontal direction and a test audio in the vertical direction according to the transfer function related to the head to be tested; Transmitting the horizontal test audio and the vertical test audio to the playback device, so that the playback device plays the horizontal test audio and the vertical test audio; Receiving a horizontal hearing distinction result generated by the subject of evaluation according to the test audio in the horizontal direction, and receiving a vertical hearing distinction result generated by the subject of evaluation according to the test audio in the vertical direction; The quality of the head-related transfer function to be tested is evaluated according to the horizontal hearing distinction result and the vertical hearing distinction result to obtain a target head-related transfer function.

5. The method according to claim 4, characterized in that The step of generating a horizontal test audio and a vertical test audio according to the head-related transfer function to be tested comprises: Determine the horizontal test sound source position according to the horizontal test plate, and determine the vertical test sound source position according to the vertical test plate; A test audio in the horizontal direction is generated through the head-related transfer function to be tested based on the horizontal test audio source position, and a test audio in the vertical direction is generated through the head-related transfer function to be tested based on the vertical test audio source position.

6. The method according to claim 5, characterized in that The step of performing quality evaluation on the head-related transfer function to be tested according to the horizontal audio discrimination result and the vertical audio discrimination result comprises: Determine the horizontal listening accuracy rate according to the horizontal listening result, and determine the vertical listening accuracy rate according to the vertical listening result; The quality of the head-related transfer function to be tested is evaluated based on the horizontal hearing discrimination accuracy and the vertical hearing discrimination accuracy.

7. The method according to claim 6, characterized in that The step of determining the horizontal listening accuracy rate according to the horizontal listening result, and determining the vertical listening accuracy rate according to the vertical listening result, comprises: Determine whether the horizontal listening result is within a preset horizontal listening position range corresponding to the horizontal test sound source position, and generate a first determination result; Determining the horizontal listening accuracy rate according to the first judgment result; Determine whether the vertical listening result is within a preset vertical listening position range corresponding to the horizontal test sound source position, and generate a second determination result; The vertical hearing discrimination accuracy is determined according to the second judgment result.

8. A playback device, characterized in that: The playback device comprises: An audio playback module, used for receiving a target head-related transfer function sent by a test device, and playing audio through the target head-related transfer function; Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

9. A testing device, characterized in that: The test equipment includes: A transmission module, used for transmitting the target head-related transfer function to a playback device, so that the playback device plays audio through the target head-related transfer function; Among them, the target head-related transfer function is obtained by the test device performing quality evaluation on the head-related transfer function to be tested according to the horizontal listening result and the vertical listening result, the horizontal listening result is obtained by the evaluation object listening to the test audio played by the playback device in the horizontal direction, and the vertical listening result is obtained by the evaluation object listening to the test audio played by the playback device in the vertical direction, and the horizontal test audio and the vertical test audio are generated by the test device according to the head-related transfer function to be tested.

10. An audio playback system, characterized in that: The system comprises the playback device as claimed in claim 8 and the testing device as claimed in claim 9.

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