A CD player with tuning function

Abstract

The utility model relates to a CD player with tone function, CD play unit is used for playing music, the tone unit is used for adjusting the gain / attenuation value of specific frequency band or specific frequency point to promote the definition and balance of overall sound. Through the preset or self -definition adjustment of EQ equalizer, the hearing feeling demand of different music styles, such as classical, jazz, popular, is matched quickly, and individual hearing preference is adapted to simultaneously. Meanwhile, the CD player is carried out EQ tone, can also improve the environmental adaptability of equipment, aiming at different listening environment, such as in -vehicle, home audio -video room, and EQ tone can compensate the frequency response deviation caused by space reflection, sound absorption difference, ensures that the tone quality keeps consistency under different scenes, improves music restoration degree and user experience.

Description

Technical Field

[0001] This utility model relates to the field of CD player technology, specifically to a CD player with tuning function. Background Technology

[0002] A CD player, also known as a laser disc player or CD player, is an intelligent, high-fidelity stereo audio device controlled by a microcomputer. It employs advanced laser technology, digital technology, computer technology, and various new components, offering advantages such as high-density recording, long playback time (60-75 minutes), ease of operation, and fast track selection. CD players can realistically reproduce recorded content with clear layers and a sense of presence. They boast high audio specifications, a wide dynamic range, broad frequency response, and low distortion.

[0003] Traditional CD players have relatively simple functions, only having audio playback capabilities. In particular, the gain and attenuation parameters of audio signals in various frequency bands are fixed and cannot be adjusted. If the device does not correct a specific frequency band sufficiently, it will affect the clarity and balance of the overall sound and cannot meet people's demand for personalized sound effects. Utility Model Content

[0004] In view of this, it is necessary to provide a CD player with tuning function that supports adjustment of gain / attenuation parameters for different frequency bands and can provide a variety of sound effects.

[0005] A CD player with tuning function includes a chassis housing and a CD playback unit and a tuning unit disposed within the chassis housing. The CD playback unit includes a CD playback mechanism, a speaker assembly, and multiple function buttons, used to play music or songs recorded on CD discs. The tuning unit includes an audio signal processing chip and a touch screen. The tuning unit is used to tune the audio signal to achieve various music playback sound effects.

[0006] Preferably, the front of the chassis housing is provided with a player compartment, the speaker assembly, and a plurality of function buttons. The player compartment has a rotatable and closable door and is used to hold CD discs. The plurality of function buttons are used to control the music playback function of the CD discs.

[0007] Preferably, the CD player mechanism is located inside the chassis housing, and the CD player mechanism is attached to one side of the player compartment. The CD player mechanism is used to drive the CD disc to rotate and read the music information recorded on the CD disc.

[0008] Preferably, the chassis housing contains a PCB circuit board, on which a control circuit unit and the audio signal processing chip are mounted. The control circuit unit is electrically connected to the audio signal processing chip and the touch screen. The touch screen is used to receive audio adjustment parameter values ​​and to display the player's working status or the duration of the playback track when playing music. The audio signal processing chip is used to gain or attenuate specific frequency bands / frequencys based on the received parameter values ​​to achieve multi-channel signal processing; The control circuit unit is used to store the EQ parameter values ​​of the audio signal processing chip, so that the CD player has a memory function for the adjustment results of the EQ parameters, and sends the EQ parameter values ​​to the audio signal processing chip when the CD player starts up.

[0009] Preferably, the tuning unit has a preset sound effect mode and a custom mode. The preset sound effect modes include pop music mode, rock music mode, jazz music mode, and classical music mode, and the equalization values ​​of each frequency band are preset according to the characteristics of different music. The custom mode is used to adjust the gain / attenuation of a specific frequency band or frequency point.

[0010] Preferably, the touch screen has two display modes: an image equalizer and a parametric equalizer. The image equalizer display mode is used to intuitively and graphically show the gain or attenuation of different frequency bands, and to intuitively and quickly adjust the gain / attenuation of preset frequency bands using a slider. The parametric equalizer display mode is used to display the bandwidth and gain / attenuation adjustment values ​​at any frequency point in the full frequency range.

[0011] Preferably, the speaker group includes at least two speakers, and the multiple speakers are respectively disposed on the left and right sides of the player housing. The multiple speakers are used to play audio signals of different channels to achieve stereo or surround sound field and provide a better listening experience.

[0012] Preferably, the bottom of the chassis housing is provided with a bass diaphragm, which is used to expand the effective vibration area, enhance the low-frequency sound wave radiation range, and improve bass penetration and spatial coverage.

[0013] Preferably, the back of the chassis also provides a TYPE-C interface, a TF card slot, a USB interface, an optical fiber interface, a coaxial interface, and an XLR XLR interface; the TYPE-C interface is used to charge the rechargeable battery built into the chassis; the TF card slot is used to read audio data from the TF card; the USB interface is used to connect a USB flash drive to play audio files from the USB flash drive; the optical fiber interface, the coaxial interface, and the XLR XLR interface are used to connect an external power amplifier, wherein the optical fiber interface and the coaxial interface are used to output digital audio signals, and the XLR XLR interface is used to output analog audio signals.

[0014] Preferably, the PCB circuit board is further provided with a wireless communication module, which is used to provide a Bluetooth module and a WIFI module to realize wireless connection between the Bluetooth speaker and the smart speaker.

[0015] In the aforementioned CD player with tuning function, the CD playback unit is used to play music, and the tuning unit is used to adjust the gain / attenuation values ​​of specific frequency bands or points to improve the overall clarity and balance of the sound. Through preset or custom EQ adjustments, different music styles, such as classical, jazz, and pop, can be quickly matched to suit individual listening preferences. Furthermore, EQ tuning of the CD player improves its environmental adaptability. For different listening environments, such as in a car or home theater, EQ tuning can compensate for frequency response deviations caused by spatial reflections and differences in sound absorption, ensuring consistent sound quality in different scenarios and improving music reproduction and user experience. This invention features a simple device structure, is easy to implement, has low cost, and is easy to promote. Attached Figure Description

[0016] Figure 1 This is a schematic diagram (front view) of a CD player with tuning function according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram (back side) of a CD player with tuning function according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0019] Please see Figure 1 and Figure 2 This paper illustrates a CD player 100 with tuning function, including a chassis housing 10 and a CD playback unit and a tuning unit disposed within the chassis housing 10. The CD playback unit includes a CD playback mechanism, a speaker group, and multiple function buttons 13, used to play music or music recorded on a CD. The tuning unit includes an audio signal processing chip and a touch screen 14. The tuning unit is used to tune the audio signal to achieve various music playback sound effects.

[0020] Specifically, after tuning by the tuning unit, the accuracy and expressiveness of the sound can be more accurately presented, satisfying individual preferences for sound quality.

[0021] Preferably, the front of the chassis housing 10 is provided with a player compartment 11, the speaker group and a plurality of function buttons 13. The player compartment 11 has a rotatable and closable door and is used to hold CD discs. The plurality of function buttons 13 are used to control the music playback function of the CD discs.

[0022] Specifically, the multiple function buttons 13 include, but are not limited to, power button, previous track button, play / pause button, next track button, stop button, volume up / down button, mode switch button, etc.

[0023] Specifically, the front of the chassis housing 10 is also provided with a volume knob 15, which is used to adjust the volume of music playback.

[0024] Preferably, the CD player mechanism is located inside the housing 10 and is attached to one side of the player compartment 11. The CD player mechanism is used to drive the CD disc to rotate and read the music information recorded on the CD disc.

[0025] Preferably, the chassis housing 10 is provided with a PCB circuit board, on which a control circuit unit and the audio signal processing chip are provided. The control circuit unit is electrically connected to the audio signal processing chip and the touch display screen 14. The touch display screen 14 is used to receive audio adjustment parameter values ​​and to display the working status of the player or the duration of the playback track when playing music. The audio signal processing chip is used to gain or attenuate specific frequency bands / frequency based on the received parameter values, dynamically adjust the signal gain in combination with a threshold mechanism, avoid distortion and optimize the sound source quality, suppress interference and noise, and realize multi-channel signal processing. The control circuit unit is used to store the EQ parameter values ​​of the audio signal processing chip, so that the CD player has a memory function for the adjustment results of the EQ parameters, and sends the EQ parameter values ​​to the audio signal processing chip when the CD player starts up.

[0026] Specifically, in this embodiment, the audio signal processing chip is an Airlyra SPA101 chip, which integrates a microcontroller (MCU), a digital signal processor (DSP), Bluetooth technology, and memory. It can perform functions such as audio decoding, sampling conversion, and audio signal processing. This chip can be used to connect to audio devices such as wireless speakers and speaker enclosures.

[0027] Preferably, the tuning unit has a preset sound effect mode and a custom mode. The preset sound effect modes include pop music mode, rock music mode, jazz music mode, and classical music mode, and the equalization values ​​of each frequency band are preset according to the characteristics of different music. The custom mode is used to adjust the gain / attenuation of a specific frequency band or frequency point.

[0028] Specifically, depending on the granularity of the division of a specific frequency band or frequency point, the custom mode is divided into frequency band adjustment mode and frequency point adjustment mode.

[0029] The frequency band adjustment mode adjusts the gain / attenuation in the low-frequency, mid-frequency, and high-frequency regions. The low-frequency band is the audio signal from 20Hz to 250Hz, which can enhance the impact and fullness; the mid-frequency band is the audio signal from 250Hz to 4kHz, which can enhance the penetration of vocals and the clarity of instruments; and the high-frequency band is the audio signal from 4kHz to 20kHz, which can improve the sense of presence and the spatial extension of the sound.

[0030] Alternatively, the frequency band can be divided into low frequency band (20Hz~150Hz), mid-low frequency band (150Hz~600Hz), mid frequency band (600Hz~3kHz), high frequency band (3kHz~16kHz), and ultra-high frequency band (above 16kHz), and the gain / attenuation of the frequency characteristics of each band can be adjusted.

[0031] The frequency adjustment mode subdivides the low-frequency band, mid-frequency band, and high-frequency band, extracts several center frequency points from each frequency band, and then sets the frequency range, gain, and bandwidth of each specific frequency point, ultimately forming an EQ fluctuation curve.

[0032] Specifically, the mode switching key is used to switch between tuning modes.

[0033] Preferably, the touch screen 14 has two display modes: an image equalizer and a parametric equalizer. The image equalizer display mode is used to intuitively and graphically show the gain or attenuation of different frequency bands, and to intuitively and quickly adjust the gain / attenuation of preset frequency bands using a slider. The parametric equalizer display mode is used to display the bandwidth and gain / attenuation adjustment values ​​at any frequency point in the full frequency range.

[0034] Specifically, the image equalizer display mode typically provides gain / attenuation adjustments for multiple specific frequency points, while the parametric equalizer display mode allows selection of the frequency point to be adjusted, followed by setting the bandwidth with that frequency point as the center frequency, and adjusting the gain / attenuation value. Therefore, the parametric equalizer display mode is suitable for professional sound tuning.

[0035] Preferably, the speaker group includes at least two speakers 12, and the plurality of speakers 12 are respectively disposed on the left and right sides of the player housing 11. The plurality of speakers 12 are used to play audio signals of different channels to achieve stereo or surround sound field and provide a better listening experience.

[0036] Specifically, in this embodiment, two speakers 12 are provided on the left and right sides of the player housing 11 to establish independent transmission paths for audio signals of different frequencies, adjust the sound emission time difference of each channel speaker 12 to ensure that the sound waves arrive at the listener's position synchronously, and realize stereo or surround sound field through multi-channel separation.

[0037] Preferably, the bottom of the chassis housing 10 is provided with a bass diaphragm, which is used to expand the effective vibration area, enhance the low-frequency sound wave radiation range, and improve bass penetration and spatial coverage.

[0038] Preferably, the back of the chassis 10 is further provided with a TYPE-C interface 21, a TF card slot 22, a USB interface 23, an optical fiber interface 24, a coaxial interface 25, and an XLR XLR interface 26; the TYPE-C interface 21 is used to charge the rechargeable battery built into the chassis 10; the TF card slot 22 is used to read audio data on the TF card; the USB interface 23 is used to connect a USB flash drive to play audio files on the USB flash drive; the optical fiber interface 24, the coaxial interface 25, and the XLR XLR interface 26 are used to connect an external power amplifier device, wherein the optical fiber interface 24 and the coaxial interface 25 are used to output digital audio signals, and the XLR XLR interface 26 is used to output analog audio signals.

[0039] Specifically, the CD player 100 provides multiple interfaces to provide digital or analog audio signals to external devices, enabling wired connection to external amplifiers.

[0040] Preferably, the PCB circuit board is further provided with a wireless communication module, which is used to provide a Bluetooth module and a WIFI module to realize wireless connection between the Bluetooth speaker and the smart speaker.

[0041] Specifically, the chassis housing 10 is also provided with an earphone jack, which is used to connect external headphones to avoid disturbing others.

[0042] Specifically, the chassis housing 10 can be made of different materials or have different patterns to give it different styles to meet people's needs. In this embodiment, the chassis housing 10 is made of wood.

[0043] In the aforementioned CD player 100 with tuning function, the CD playback unit is used to play music, and the tuning unit is used to adjust the gain / attenuation values ​​of specific frequency bands or points to improve the overall clarity and balance of the sound. Through preset or custom EQ adjustments, different music styles, such as classical, jazz, and pop, can be quickly matched to suit individual listening preferences. Furthermore, EQ tuning of the CD player improves its environmental adaptability. For different listening environments, such as in a car or home theater, EQ tuning can compensate for frequency response deviations caused by spatial reflections and differences in sound absorption, ensuring consistent sound quality in different scenarios and improving music reproduction and user experience. This invention features a simple device structure, is easy to implement, has low cost, and is easy to promote.

[0044] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A CD player with tuning function, characterized in that, Includes a chassis housing and a CD playback unit and a tuning unit housed within the chassis housing. The CD playback unit includes a CD playback mechanism, a speaker assembly, and multiple function buttons, used to play music or songs recorded on CD discs. The tuning unit includes an audio signal processing chip and a touch screen. The tuning unit is used to tune the audio signal to achieve corresponding music playback sound effects.

2. The CD player with tuning function as described in claim 1, characterized in that, The front of the chassis housing is provided with a player compartment, the speaker group and multiple function buttons. The player compartment has a rotatable door and is used to hold CD discs. The multiple function buttons are used to control the music playback function of the CD discs.

3. The CD player with tuning function as described in claim 2, characterized in that, The CD player mechanism is located inside the chassis housing and is attached to one side of the player compartment. The CD player mechanism is used to drive the CD disc to rotate and read the music information recorded on the CD disc.

4. The CD player with tuning function as described in claim 1, characterized in that, The chassis housing contains a PCB circuit board, on which a control circuit unit and the audio signal processing chip are mounted. The control circuit unit is electrically connected to the audio signal processing chip and the touch screen. The touch screen is used to receive audio adjustment parameter values ​​and to display the player's working status or the duration of the playback track when playing music. The audio signal processing chip is used to gain or attenuate a preset frequency band / frequency based on the received parameter values ​​to achieve multi-channel signal processing; The control circuit unit is used to store the EQ parameter values ​​of the audio signal processing chip, so that the CD player has a memory function for the adjustment results of the EQ parameters, and sends the EQ parameter values ​​to the audio signal processing chip when the CD player starts up.

5. The CD player with tuning function as described in claim 1, characterized in that, The tuning unit has preset sound effect modes and a custom mode. The preset sound effect modes include pop music mode, rock music mode, jazz music mode, and classical music mode, and the equalization values ​​of each frequency band are preset according to the characteristics of different music. The custom mode is used to adjust the gain / attenuation of preset frequency bands or preset frequency points.

6. The CD player with tuning function as described in claim 4, characterized in that, The touch screen has two display modes: image equalizer and parametric equalizer. The image equalizer display mode is used to intuitively and graphically show the gain or attenuation of different frequency bands, and to intuitively and quickly adjust the gain / attenuation of preset frequency bands using a slider. The parametric equalizer display mode is used to display the bandwidth and gain / attenuation adjustment values ​​at any frequency point in the full frequency range.

7. The CD player with tuning function as described in claim 2, characterized in that, The speaker group includes at least two speakers, and multiple speakers are respectively located on the left and right sides of the player housing. The multiple speakers are used to play audio signals of different channels to achieve stereo or surround sound and provide a better listening experience.

8. The CD player with tuning function as described in claim 1, characterized in that, The bottom of the chassis is provided with a bass diaphragm, which is used to expand the effective vibration area, enhance the low-frequency sound wave radiation range, and improve bass penetration and spatial coverage.

9. The CD player with tuning function as described in claim 1, characterized in that, The back of the chassis also features a TYPE-C interface, a TF card slot, a USB interface, an optical fiber interface, a coaxial interface, and an XLR XLR interface. The TYPE-C interface is used to charge the rechargeable battery built into the chassis. The TF card slot is used to read audio data from a TF card. The USB interface is used to connect a USB flash drive to play audio files from the flash drive. The optical fiber interface, the coaxial interface, and the XLR XLR interface are used to connect an external amplifier, wherein the optical fiber interface and the coaxial interface are used to output digital audio signals, and the XLR XLR interface is used to output analog audio signals.

10. The CD player with tuning function as described in claim 4, characterized in that, The PCB circuit board is also equipped with a wireless communication module, which provides a Bluetooth module and a WIFI module to enable wireless connection between the Bluetooth speaker and the smart speaker.

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