98results about How to "Improve audio performance" patented technology

A protective holder for the iPhone®, iPad®, iPod Touch™, electronic books, electronic tablet computers and other portable devices having a frontal LCD, OLED, touch screen, or other display that employs a form-fitting backplate with corner frames for cradling the device while leaving the entire frontal aspect unobstructed is disclosed. The holder may include a series of contoured side grippers on each side of the backplate for clamping the device in place without obstructing the LCD screen (or access to it for cleaning or otherwise). The holder may include a fully-adjustable kickstand for upright hands-free viewing of the device at several landscape and portrait angles and the holder may also include a built-in moveable directional sound reflector and noise shield improves audio performance, and a detachable belt clip allows belt wearing. The holder has an extreme slimline folded profile to facilitate pocket insertion, minimize bulk and create an eye-catching aesthetic.

A protective holder for the iPhone®, iPod Touch™, electronic books, electronic tablet computers and other portable devices having a frontal LCD, OLED, touch screen, or other display that employs a form-fitting backplate with corner frames for cradling the device while leaving the entire frontal aspect unobstructed is disclosed. The holder may include a series of contoured side grippers on each side of the backplate for clamping the device in place without obstructing the LCD screen (or access to it for cleaning or otherwise). The holder may include a fully-adjustable kickstand for upright hands-free viewing of the device at several landscape and portrait angles and the holder may also include a built-in moveable directional sound reflector and noise shield improves audio performance, and a detachable belt clip allows belt wearing. The holder has an extreme slimline folded profile to facilitate pocket insertion, minimize bulk and create an eye-catching aesthetic.

A headset having game, chat and microphone audio signals is provided with a programmable signal processor for individually modifying the audio signals and a memory configured to store a plurality of user-selectable signal-processing parameter settings that determine the manner in which the audio signals will be altered by the signal processor. The parameter settings collectively form a preset, and one or more user-operable controls can select and activate a preset from the plurality of presets stored in memory. The parameters stored in the selected preset can be loaded into the signal processor such that the sound characteristics of the audio paths are modified in accordance with the parameter settings in the selected preset.

A protective holder for the iPhone®, iPad®, iPod Touch™, electronic books, electronic tablet computers and other portable devices having a frontal LCD, OLED, touch screen, or other display that employs a form-fitting backplate with corner frames for cradling the device while leaving the entire frontal aspect unobstructed is disclosed. The holder may include a series of contoured side grippers on each side of the backplate for clamping the device in place without obstructing the LCD screen (or access to it for cleaning or otherwise). The holder may include a fully-adjustable kickstand for upright hands-free viewing of the device at several landscape and portrait angles and the holder may also include a built-in moveable directional sound reflector and noise shield improves audio performance, and a detachable belt clip allows belt wearing. The holder has an extreme slimline folded profile to facilitate pocket insertion, minimize bulk and create an eye-catching aesthetic.

Cases or holders for cell phones, personal digital assistants, portable video / music players, electronic books, electronic tablets and other handheld and / or free-standing display devices, as well as the devices themselves are disclosed. In different embodiments, a versatile protective holder that can allow placement on any surface for hands-free viewing, with full adjustment of viewing angle in landscape and / or portrait orientations; directional sound reflecting and baffling; easier cleaning and viewing of the device's screen; easier grasping by the user; wearing of the device using a belt clip or arm or waist band; as well as attachment to an automobile, bicycle, or other vehicle are disclosed.

A method and a system for simultaneously generating configurable three-dimensional (3D) sounds are provided. A 3D sound processing application (3DSPA) in operative communication with a microphone array system (MAS) is provided on a computing device. The MAS forms acoustic beam patterns and records sound tracks from the acoustic beam patterns. The 3DSPA generates a configurable sound field on a graphical user interface using recorded or pre-recorded sound tracks. The 3DSPA acquires user selections of configurable parameters associated with sound sources from the configurable sound field. The 3DSPA dynamically processes the sound tracks using the user selections to generate a configurable 3D binaural sound, surround sound, and / or stereo sound. The 3DSPA measures head related transfer functions (HRTFs) in communication with a simulator apparatus that simulates a human's upper body. The 3DSPA generates the binaural sound by processing the sound tracks with the HRTFs based on the user selections.

A self-oscillating switching amplifier having an error amplifier output combined with the output of an output signal differentiator according predetermined weighing factors to force a small oscillation around the averaged output signal at a high frequency. The feedback voltage is sensed at the output of the switching amplifier. Additional feedback can be derived from a switching node of the power switch. The switching of the power switch can be dynamically changed from binary switching when the amplitude of the audio signal is low, to ternary switching when the amplitude of the input signal is high to minimize distortion of the output signal. The amplifier can be supplied with a pulsing voltage. In certain embodiments the output signal differentiator is simply a capacitor or a LC resonance circuit coupled directly to an appropriate speaker terminal for the highest possible self-oscillating frequency of the switching amplifier.

Disclosed herein is a method of sending and receiving(or transceiving) audio stream in a wireless communication system. The method performed by a first device includes receiving reference codec information from a second device, performing an audio codec negotiation procedure for determining an audio codec to be used to send and receive audio stream to and from a third device, checking whether the audio codec determined through the audio codec negotiation procedure is identical with the audio codec supportable by the second device, and operating in bypass mode or conversion mode based on a result of the check.

The present disclosure relates to a live broadcast processing method, device, terminal equipment and system. The method includes: establishing a live connection with the guest client; receiving the guest audio stream sent by the guest client; synthesizing the local anchor audio stream and the guest audio stream to obtain the target audio stream; sending the audio stream to the server The target audio stream, so that the server sends the target audio stream to the audience client and the guest client. The solution of the present disclosure can solve the problem of communication delay during multi-person live broadcast and improve user experience.

A self-oscillating switching amplifier having an error amplifier output combined with the output of an output signal differentiator according predetermined weighing factors to force a small oscillation around the averaged output signal at a high frequency. The feedback voltage is sensed at the output of the switching amplifier. Additional feedback can be derived from a switching node of the power switch. The switching of the power switch can be dynamically changed from binary switching when the amplitude of the audio signal is low, to ternary switching when the amplitude of the input signal is high to minimize distortion of the output signal. The amplifier can be supplied with a pulsing voltage. In certain embodiments the output signal differentiator is simply a capacitor or a LC resonance circuit coupled directly to an appropriate speaker terminal for the highest possible self-oscillating frequency of the switching amplifier.

The invention discloses a loudspeaker box, which comprises an upper cover, a lower cover fixed on the upper cover and forming an accommodation space together, and a sounding unit accommodated in the accommodation space. The sounding unit and the upper cover form a front cavity by enclosing, and the sounding unit, the lower cover and the upper cover form a rear cavity by enclosing; Wherein the loudspeaker box further comprises a cover plate fixed on the side of the upper cover far away from the lower cover and an air permeable separator, wherein the cover plate and the upper cover are spaced apart to form an auxiliary sound cavity, and the auxiliary sound cavity is filled with sound-absorbing particles; The upper cover is provided with a through hole penetrating the upper cover, and the through hole communicates the rear cavity with the auxiliary sound cavity. The air permeable separator is fixed on the upper cover and completely covers the through hole, and the air permeable separatorcloses the sound-absorbing particles in the auxiliary sound cavity. Compared with the prior art, the loudspeaker box of the present invention can increase the volume of the second rear cavity for being filled the sound-absorbing particles, improve the audio performance and improve the acoustic performance.

The embodiment of the invention discloses an audio frequency band processing method and system, being capable of improving audio performances which can be perceived by a user without adding algorithm complexity and power consumption. According to the embodiment, the audio frequency band processing method comprises the steps of: determining a loudness value dynamic range of a to-be-processed audio signal; selecting a corresponding human ear equal-loudness contour based on the loudness value dynamic range of the audio signal; determining a frequency range of the audio signal; determining a weight value of each frequency point within the frequency range of the audio signal based on the selected human ear equal-loudness contour; and dividing the audio signal into a plurality of audio frequency sub-band signals based on the weight value of each frequency point. The embodiment of the invention also provides an audio frequency band processing system. The embodiment of the invention can improve audio performances which can be perceived by the user without adding the algorithm complexity and the power consumption.

The invention provides a loudspeaker box comprising a main cone frame, a first upper cover covered on a top end of the main cone frame and enclosed to form an accommodation space together with the main cone frame, and a sound production monomer accommodated in the accommodation space, wherein the sound production monomer and the first upper cover are enclosed to form a front cavity together, the sound production monomer and the main cone frame are enclosed to form a back cavity together, the loudspeaker box further comprises an extension part extending from the main cone frame toward a direction away from the accommodation space, a trunk bulkhead extending from the top end toward the bottom end of the main cone frame and a ventilating isolation part; a first sound absorption cavity filled with a sound production material is arranged in the extension part; the trunk bulkhead is located in the back cavity and is enclosed to form a second sound absorption cavity for accommodating the sound production material together with the main cone frame; the first sound absorption cavity communicates with the second sound absorption cavity, and the second sound absorption cavity communicates with the back cavity; and the ventilating isolation part is covered on one end of the second sound absorption cavity away from the first upper cover so as to prevent the sound production material from entering the back cavity. Compared with the prior art, the loudspeaker provided by the invention has the advantages of simple structure, and good low audio performance, and especially low frequency performance.

The invention provides a method and device for carrying out the fault diagnosis of the audio element of a mobile terminal. The device comprises a recording acquisition module which is used for using the built-in microphone of the mobile terminal to record sweep frequency audio so as to obtain a first recording when the speaker of the mobile terminal plays a sweep frequency audio in a set frequency range in an anechoic chamber and using the external microphone of the mobile terminal to record a frequency audio so as to obtain a second recording, a recording conversion module used for converting the first recording into a first frequency response curve and converting the second recording into a second frequency response curve, a fault diagnosis module used for comparing the first frequency response curve and the second frequency response curve with a set standard curve and carrying out fault diagnosis on the speaker and the microphones in the mobile terminal based on a comparison result. According to the method and the device, the analysis efficiency of an after-sale audio failure is improved.

A speaker system comprises a first speaker (203) and a second speaker (205). A driving circuit receives an audio signal and comprises a first drive circuit (209) generating a first drive signal for the first speaker (203) in response to a first filtering of the audio signal with a first pass band. A second drive circuit (211) generates a second drive signal for the second speaker (205) in response to a second filtering having a second pass band which comprises a frequency band below the first pass band. A delay (213) delays the second drive signal relative to the first drive signal. The sound from the second speaker is directionally radiated with a directional radiation pattern having a notch towards the listening position (111). The system uses the precedence effect and non-direct low frequency audio radiation to ensure that directional cues are predominantly provided by the first speaker (203) which may be small and positioned remote from the second speaker (205).

A digital amplifier causes a gate drive circuit to drive output transistors, and switches a power source voltage supplied from a variable voltage power source, thereby amplifying an amplitude of a 1-bit digital signal outputted from a ΔΣ block. A variable voltage power source varies a driving voltage, by which an upper gate drive circuit drives output transistors, as a voltage obtained by adding (i) a constant voltage supplied to a lower gate drive circuit to (ii) a power source voltage, so as to correspond to the power source voltage. Thus, the driving voltage is minimized without influencing a switching operation of the output transistors. As a result, it is possible to reduce power consumption of the upper gate drive circuit in turning down the volume.

A digital amplifier causes a gate drive circuit to drive output transistors, and switches a power source voltage supplied from a variable voltage power source, thereby amplifying an amplitude of a 1-bit digital signal outputted from a ΔΣ block. A variable voltage power source varies a driving voltage, by which an upper gate drive circuit drives output transistors, as a voltage obtained by adding (i) a constant voltage supplied to a lower gate drive circuit to (ii) a power source voltage, so as to correspond to the power source voltage. Thus, the driving voltage is minimized without influencing a switching operation of the output transistors. As a result, it is possible to reduce power consumption of the upper gate drive circuit in turning down the volume.

The present invention provides lossless switching by configuring the output inductor so that the ripple current amplitude at load conditions results in small negative current during switching. The reconfigured output inductor results in increased ripple current amplitude. This increased ripple amplitude may be further controlled using zero ripple steering techniques to eliminate ripple at the output capacitor. A ripple steering technique involves adding a secondary output to the class D amplifier which steers the switching ripple away from the main output thus substantially relieving the main output from a major artifact of prior art Class D amplifiers.

An apparatus and method for creating and performing an audio-visual montage assembled from tagged audio files matched with tagged video or graphic or photo image files in a hand held computation device and preferably performed on an external display device such as a television or computer monitor that may also have associated audio performance systems.

A digital Class-D amplifier distortion suppression circuit design is disclosed. A distortion suppression feedback loop is described to improve audio performance by suppressing output stage non-linearity and improving power supply noise rejection achieving reduced THD+N. The feedback loop is placed around the power stage. It forces tracking between the audio band signals at the input and output of the power stage by automatically adjusting the gating signal timing based on sensed effective duty ratio error. Error sensing and compensation are performed using techniques that lend to simple circuit implementation.

The present invention provides lossless switching by configuring the output inductor so that the ripple current amplitude at load conditions results in small negative current during switching. The reconfigured output inductor results in increased ripple current amplitude. This increased ripple amplitude may be further controlled using zero ripple steering techniques to eliminate ripple at the output capacitor. A ripple steering technique involves adding a secondary output to the class D amplifier which steers the switching ripple away from the main output thus substantially relieving the main output from a major artifact of prior art Class D amplifiers.

A system and method for using a circuit for providing power from multiple sources for a variable audio amplifier. The system includes a battery, a power supply and a controller which provides a power supply for the variable load demands of the amplifier, while still maintaining a substantially constant battery charge over an extended period of time.

The invention discloses an audio signal sending method. The audio signal sending method comprises the following steps: obtaining audio information of a first sound channel, audio information of a second sound channel, audio information of a third sound channel and audio information of a fourth sound channel; performing analogue-digital conversion of the obtained audio information of the first sound channel and the obtained audio information of the second sound channel so as to obtain first audio information, and performing analogue-digital conversion of the obtained audio information of the third sound channel and the obtained audio information of the fourth sound channel so as to obtain second audio information; performing coding operation of the first audio information and the second audio information so as to obtain information to be sent; and sending the information to be sent. The invention further discloses an audio signal sending device, an audio signal receiving method and device. According to the invention, the data information of the four sound channels is sent through one transmitter; therefore, mutual interference of transmitted signals due to the fact that the data information of the four sound channels is emitted by adopting two wireless transmission modules can be avoided; the number of the transmitters can be reduced; and the cost is reduced.