Multi-channel in-vehicle audio system

Abstract

The present invention relates to a multi-channel in-vehicle audio system, which comprises: an audio processing device, a power amplifier, and a plurality of speakers. It is characterized in that the plurality of speakers include: a center speaker disposed at the front center of the vehicle cockpit; a left speaker disposed at the left front of the vehicle cockpit; a right speaker disposed at the right front of the vehicle cockpit; a left surround speaker disposed on the left side of the vehicle cockpit; a right surround speaker disposed on the right side of the vehicle cockpit; and a left front 3D speaker and a right front 3D speaker disposed on both sides of the roof and corresponding to the front row seats. For any one of the plurality of speakers, the speakers located around the speaker are used to perform azimuth compensation for the speaker. According to the present invention, the sound field can be made more immersive, a better sound experience can be achieved, and the tone color can be better restored.

Description

Technical Field

[0001] The present invention relates to audio processing technology, and more particularly to a multi-channel in-vehicle audio system. Background Art

[0002] An in-vehicle audio system refers to an audio system installed in a vehicle, including software and media, sound sources, power amplifiers, speakers, and transmission mechanisms. Although the in-vehicle audio system is an auxiliary device for a vehicle, with increasing consideration of the experience of passengers, higher and higher requirements are put forward for the in-vehicle audio system. Moreover, although the configuration of in-vehicle entertainment systems is getting higher and higher at present, the sound effect processing is still not good enough and far from meeting the requirements of users for the quality of in-vehicle entertainment systems.

[0003] On the other hand, for most current in-vehicle applications, the sound sources are stereo or 5.1 surround, which still cannot meet the requirements of immersive sound. Summary of the Invention

[0004] In view of the above problems, the present invention aims to provide a multi-channel in-vehicle audio system capable of restoring the home theater effect.

[0005] The multi-channel in-vehicle audio system of the present invention includes: an audio processing device, a power amplifier, and a plurality of speakers. Among them, the audio processing device is used to distribute multi-channel audio to the plurality of speakers, the power amplifier is used to amplify the power of the audio signal processed by the audio processing device, and the speakers are used to play the distributed audio. It is characterized in that the plurality of speakers include:

[0006] A center speaker disposed at the front center of the vehicle cockpit;

[0007] A left speaker disposed at the front left of the vehicle cockpit;

[0008] A right speaker disposed at the front right of the vehicle cockpit;

[0009] A left surround speaker disposed on the left side of the vehicle cockpit;

[0010] A right surround speaker disposed on the right side of the vehicle cockpit; and

[0011] A left front 3D speaker and a right front 3D speaker disposed on both sides of the roof and corresponding to the front row seats,

[0012] In the case where there is an obstruction between one of the plurality of speakers and the occupant, the speakers located around the speaker are used to perform azimuth compensation for the speaker.

[0013] Optionally, the plurality of speakers further include:

[0014] Set left rear 3D speakers and right rear 3D speakers on both sides of the vehicle roof and corresponding to the positions of the rear seats.

[0015] Optionally, the multiple speakers further include:

[0016] A left rear surround speaker set on the left rear side of the vehicle cockpit; and

[0017] A right rear surround speaker set on the right rear side of the vehicle cockpit.

[0018] Optionally, the azimuth compensation for the speaker by using the speakers around the speaker includes:

[0019] Achieving azimuth compensation by adjusting one or more of the gain frequency, frequency, and phase of the speakers around the speaker.

[0020] Optionally, when the occupant is in the driver's seat, using the center speaker, the right front 3D speaker, the left surround speaker, and the left rear 3D speaker to perform azimuth compensation for the left front 3D speaker.

[0021] Optionally, when there is an obstruction between the left rear 3D speaker and the listener, using the left surround speaker, the left speaker, and the left front 3D speaker to perform azimuth compensation.

[0022] Optionally, the left speaker, right speaker, left surround speaker, and right surround speaker respectively adopt a 3-way frequency division including high, mid, and low frequencies,

[0023] The left rear surround speaker and the right rear surround speaker respectively adopt a 2-way frequency division including high and mid frequencies,

[0024] The left front 3D speaker and the right front 3D speaker respectively adopt a 2-way frequency division including high and mid frequencies.

[0025] Optionally, using the bass of the left speaker to compensate the bass of the left front 3D speaker.

[0026] Optionally, the left speaker, right speaker, left surround speaker, and right surround speaker respectively consist of 3 independent speakers of high, mid, and low frequencies,

[0027] The left rear surround speaker and the right rear surround speaker respectively consist of 2 independent speakers of high and mid frequencies,

[0028] The left front 3D speaker and the right front 3D speaker respectively consist of 2 independent speakers of high and mid frequencies.

[0029] Optionally, the left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker are respectively arranged at positions above 90% of the preset average sitting height.

[0030] As described above, in the multi-channel in-vehicle audio system according to the present invention, the sound field is more immersive, enabling a better sound experience, better restoring the timbre, and bringing a more vivid 3D immersive Dolby Atmos experience to the occupants in the sound field. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a multi-channel in-vehicle audio system representing the prior art.

[0032] Figure 2 is a schematic layout diagram of the speakers of the multi-channel in-vehicle audio system according to an embodiment of the present invention.

[0033] Figure 3 is a schematic diagram of azimuth compensation and bass compensation of the multi-channel in-vehicle audio system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following describes some of the multiple embodiments of the present invention, aiming to provide a basic understanding of the present invention. It is not intended to identify the key or decisive elements of the present invention or to limit the scope to be protected.

[0035] For the sake of brevity and illustrative purposes, the principles of the present invention are mainly described herein with reference to its exemplary embodiments. However, those skilled in the art will readily recognize that the same principles can be equivalently applied to all types of multi-channel in-vehicle audio systems and these same principles can be implemented therein, and any such variations do not depart from the true spirit and scope of this patent application.

[0036] Moreover, in the following description, reference is made to the drawings, which illustrate specific exemplary embodiments. Electrical, mechanical, logical, and structural changes can be made to these embodiments without departing from the spirit and scope of the present invention. In addition, although a feature of the present invention is disclosed in combination with only one of several embodiments / embodiments, this feature can be combined with one or more other features of other embodiments / embodiments as may be desired and / or advantageous for any given or identifiable function. Therefore, the following description should not be construed in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.

[0037] Terms such as "comprising" and "including" indicate that in addition to the units (modules) and steps directly and explicitly stated in the specification and claims, the technical solution of the present invention does not exclude the situation of having other units (modules) and steps that are not directly or explicitly stated.

[0038] Figure 1 It is a schematic structural diagram of a multi-channel in-vehicle audio system representing the prior art.

[0039] Such as Figure 1 As shown, in the multi-channel in-vehicle audio system of the prior art, it is applied for streaming media (or it can also be replaced by local media, such as USB) playback, and the undecoded audio stream is transmitted to the decoder, or the unencoded audio is directly transmitted to the next stage by skipping the decoder. The decoder includes but is not limited to multi-channel formats such as Dolby Atmos, DTS X, Auro3D, etc. The audio bus is used for audio transmission between different modules, and it can also be located at other positions of the audio stream shown in Figure 1 It includes but is not limited to methods such as A2B, Most, Ethernet, etc.

[0040] In the present invention, the so-called audio processing refers to distributing multi-channel audio to different power amplifier channels of the corresponding speakers in the vehicle. The multi-channel in-vehicle audio system of the present invention mainly includes: an audio processing device, a power amplifier, and multiple speakers. Among them, the audio processing device is used to distribute multi-channel audio to multiple speakers, the power amplifier is used to amplify the power of the audio signal processed by the audio processing device, and the speakers are used to play the distributed audio.

[0041] First, the layout method of the speakers of the multi-channel in-vehicle audio system according to an embodiment of the present invention will be described.

[0042] Figure 2 It is a schematic layout diagram of the speakers of the multi-channel in-vehicle audio system according to an embodiment of the present invention.

[0043] Such as Figure 2 As shown, the speakers are laid out according to the 7.1.4 channel scheme:

[0044] "7": The left speaker, center speaker, right speaker, left surround speaker, right surround speaker, left rear surround speaker, and right rear surround speaker are respectively arranged ( Figure 2 In which left, center, right, left surround, right surround, left rear surround, and right rear surround are respectively indicated);

[0045] "4": The left front 3D speaker, right front 3D speaker, left rear 3D speaker, and right rear 3D speaker are respectively arranged ( Figure 2(represented as left front 3D, right front 3D, left rear 3D, and right rear 3D respectively);

[0046] "1": Subwoofer ( Figure 2 represented as subwoofer).

[0047] Among them, the center speaker is set in the front center of the vehicle cockpit, the left speaker is set in the left front of the vehicle cockpit, the right speaker is set in the right front of the vehicle cockpit, the left surround speaker is on the left side of the vehicle cockpit, the right surround speaker is set on the right side of the vehicle cockpit, the left rear surround speaker is set in the left rear of the vehicle cockpit, and the right rear surround speaker is set in the right rear of the vehicle cockpit.

[0048] The left front 3D speaker and the right front 3D speaker are set on both sides of the roof and corresponding to the positions of the front row seats, and the left rear 3D speaker and the right rear 3D speaker are set on both sides of the roof and corresponding to the positions of the rear row seats.

[0049] Among them, in particular, the left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker can be respectively arranged at positions above 90% of the preset average sitting height. As an example, assuming an average height of 175 cm, the average sitting height is about 55 to 65 cm, then the left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker can be respectively arranged at positions above 49.5 cm to 58.5 cm (starting from the seat surface). As an example, the left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker can also not be arranged at positions higher than the ears of the occupant but not too close to the ears. In this way, according to the arrangement positions of the left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker, a three-dimensional and broad sound field can be created using sounds with "height".

[0050] Due to the limitations of the in-vehicle layout and the size of the speakers, each channel not only requires the speakers at its own position to play, but also requires the surrounding speakers to make up for it to accurately locate the sound position and restore the tone color. Next, the azimuth compensation and bass compensation in the multi-channel in-vehicle audio system of the present invention will be described.

[0051] Figure 3 It is a schematic diagram showing the azimuth compensation and bass compensation of the multi-channel in-vehicle audio system according to an embodiment of the present invention.

[0052] First, the azimuth compensation performed by the multi-channel in-vehicle audio system of the present invention will be described.

[0053] The inventors of the present invention have found that when there is an obstruction between the speaker and the occupant, the home theater effect cannot be fully restored. To solve this problem, a method of using other speakers around the speaker for azimuth compensation is proposed in the present invention.

[0054] Azimuth compensation can be divided into two categories:

[0055] One is occlusion compensation; and

[0056] One is distance compensation, that is, when the distance is too close, in order to prevent the human ear from localizing the sound as very close, the sound field is pulled away for compensation.

[0057] Regarding occlusion compensation, specifically, when there is an obstruction between one of the multiple speakers and the occupant, the speakers located around the speaker can be used to perform azimuth compensation for the speaker. As a specific implementation method of azimuth compensation, azimuth compensation is achieved by adjusting one or more of the gain frequency, frequency, and phase of the other speakers around the speaker.

[0058] As an example of occlusion compensation for azimuth compensation, for example (not shown), when there is an obstruction (such as the driver's seat blocking) between the occupant in the driver's position and the left rear 3D speaker, the left surround speaker, the left speaker, and the left front 3D speaker are used for azimuth compensation.

[0059] Regarding distance compensation, specifically, when the distance between one of the multiple speakers and the occupant is too close, the speakers located around the speaker can be used to perform distance compensation for the speaker. As a specific implementation method of azimuth compensation, azimuth compensation is achieved by adjusting one or more of the gain frequency, frequency, and phase of the other speakers around the speaker.

[0060] Specifically, as an example of distance compensation in azimuth compensation, for example, in Figure 3 when the occupant is in the driver's seat, the distance between the left front 3D speaker and the occupant is too close. In order to pull away the sound, the center speaker, the right front 3D speaker, the left surround speaker, and the left rear 3D speaker are used to perform azimuth compensation for the front 3D speaker.

[0061] In this way, by performing azimuth compensation through the surrounding speakers, accurate positioning of the sound position can be achieved, thereby perfectly restoring the tone color.

[0062] Next, the bass compensation of the multi-channel in-vehicle audio system of the present invention will be described.

[0063] In this embodiment, the left speaker, the right speaker, the left surround speaker, and the right surround speaker respectively adopt a 3-way frequency division including high, mid, and low frequencies.

[0064] The left rear surround speaker and the right rear surround speaker respectively adopt a 2-way configuration including a tweeter and a midrange. The left front 3D speaker and the right front 3D speaker respectively adopt a 2-way configuration including a tweeter and a midrange.

[0065] In this way, the bass of the left speaker can compensate for the bass of the left front 3D speaker, and thus, the timbre can be restored more completely.

[0066] Furthermore, in this embodiment, in order to better restore the timbre, the following specific configurations of the speakers can also be carried out:

[0067] The left speaker, the right speaker, the left surround speaker, and the right surround speaker are respectively composed of 3 independent speakers of a tweeter, a midrange, and a woofer. The left rear surround speaker and the right rear surround speaker are respectively composed of 2 independent speakers of a tweeter and a midrange. The left front 3D speaker and the right front 3D speaker are respectively composed of 2 independent speakers of a tweeter and a midrange. The left rear surround speaker and the right rear surround speaker are respectively composed of 2 independent speakers of a tweeter and a midrange. Through the composition of such multiple groups of speakers, the sense of sound stereoscopy can be enhanced, and the sense of sound reality can be significantly improved.

[0068] Thus, by using the above configurations of multiple speakers, a complete surround sound can be achieved, enabling the sound to surround the occupant from all directions, so that the occupant can obtain the experience of a home theater.

[0069] As described above, according to the multi-channel in-vehicle audio system of the present invention, the sound field can be made more immersive, a better sound experience can be achieved, and the timbre can be better restored, bringing a more full 3D immersive Dolby Atmos experience to the occupant in the sound field.

[0070] The above examples mainly illustrate the multi-channel in-vehicle audio system of the present invention. Although only some specific embodiments of the present invention are described, those of ordinary skill in the art should understand that the present invention can be implemented in many other forms without departing from its gist and scope. Therefore, the examples and embodiments shown are regarded as illustrative rather than restrictive, and the present invention may cover various modifications and substitutions without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A multi-channel in-vehicle audio system, comprising: an audio processing device, a power amplifier, and a plurality of speakers. Among them, the audio processing device is used to distribute multi-channel audio to the plurality of speakers, the power amplifier is used to amplify the power of the audio signal processed by the audio processing device, and the speaker is used to play the distributed audio. It is characterized in that the plurality of speakers include: a center speaker disposed at the front center of the vehicle cockpit; a left speaker disposed at the left front of the vehicle cockpit; a right speaker disposed at the right front of the vehicle cockpit; a left surround speaker disposed on the left side of the vehicle cockpit; a right surround speaker disposed on the right side of the vehicle cockpit; a left front 3D speaker and a right front 3D speaker disposed on both sides of the roof and corresponding to the front seats; and a left rear 3D speaker and a right rear 3D speaker disposed on both sides of the roof and corresponding to the rear seats, For any one of the plurality of speakers, the speakers located around the speaker are used to perform azimuth compensation on the speaker, wherein the azimuth compensation includes occlusion compensation and distance compensation, wherein the using the speakers located around the speaker to perform azimuth compensation on the speaker includes: achieving azimuth compensation by adjusting one or more of the frequency, delay, and phase of the speakers around the speaker, wherein, in the case of occlusion between the occupant and the speaker, as the azimuth compensation, one or more speakers around the speaker are used for occlusion compensation, wherein, in the case of the distance between the occupant and the speaker being too close, as the azimuth compensation, one or more speakers around the speaker are used for distance compensation.

2. The multi-channel in-vehicle audio system according to claim 1, characterized in that the plurality of speakers further include: a left rear surround speaker disposed at the left rear of the vehicle cockpit; and a right rear surround speaker disposed at the right rear of the vehicle cockpit.

3. The multi-channel in-vehicle audio system according to claim 2, characterized in that the left speaker, the right speaker, the left surround speaker, and the right surround speaker respectively adopt a 3-way frequency division including high, mid, and low frequencies, the left rear surround speaker and the right rear surround speaker respectively adopt a 2-way frequency division including high and mid frequencies, the left front 3D speaker and the right front 3D speaker respectively adopt a 2-way frequency division including high and mid frequencies.

4. The multi-channel in-vehicle audio system according to claim 3, characterized in that the bass of the left speaker is used to compensate for the bass of the left front 3D speaker.

5. The multi-channel in-vehicle audio system according to claim 3, characterized in that the left speaker, the right speaker, the left surround speaker, and the right surround speaker are respectively composed of 3 independent speakers of high, mid, and low frequencies, the left rear surround speaker and the right rear surround speaker are respectively composed of 2 independent speakers of high and mid frequencies, the left front 3D speaker and the right front 3D speaker are respectively composed of 2 independent speakers of high and mid frequencies.

6. The multi-channel in-vehicle audio system according to claim 1, characterized in that The left front 3D speaker, the right front 3D speaker, the left rear 3D speaker, and the right rear 3D speaker are respectively arranged at positions above 90% of a preset average sitting height.

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