60 results about "Distortion minimization" patented technology

A method, apparatus, and article of manufacture provide the ability to construct an optimal parameterization for a discrete surface patch. A three-dimensional image having a surface is selected. An initial parameterization of the surface onto a two-dimensional plane is constructed. A distortion of the initial parameterization is measured. A length parameter, an area parameter, and an angle parameter are specified. The initial parameterization is then optimized through a discrete deformation of a parameter domain that minimizes the distortion based on the length, area, and angle parameter.

The present invention relates to a bone conduction speaker module and bone conduction earphones having bone conduction speaker modules and, more specifically, to a bone conduction speaker module and bone conduction earphones having bone conduction speaker modules, which can accurately output sound by minimizing the distortion of an inputted signal, can stably output sound with little vibrations, enable a user to use the earphones in a comfortable state by minimizing the vibrations transmitted to the user, prevent a strain from being put on the user's body even when the earphones are used for a long time, by minimizing the influence thereon, which a magnetic force of a magnet provided therein exerts on the user, facilitate the wearing thereof since the earphones are formed as an in-ear type, and can prevent an accident from occurring when the user does not hear an external sound, by allowing the user to naturally hear the external sound. To this end, the present invention relates to the bone conduction speaker module used for earphones, headphones and hearing aids, the bone conduction speaker module comprising: a housing comprising a first case for covering a part coming into contact with the human body, and a second case for covering the other side of the first case; a magnet part provided inside the housing; and a voice coil part positioned at the top of the magnet part.

A spherical enclosure for a camera, has in some examples, an optically transmitting wall, a highly-reflective external surface, a coated internal surface, a collapsible internal lining, and a support tube. The wall may have a region of varying wall thickness providing a lens. The collapsible internal liner is made of a material that obscures the camera's silhouette, and is inserted through an opening in the wall while folded, and then expands into position. The inner surface of the enclosure may be coated with a material that reduces internal reflections. The camera, when mounted in the enclosure has the optical center of the camera coincident with the geometric center of the spherical enclosure, so that distortion of the camera image is minimized.

A method acquires compressed videos. Intra-, or inter-frames of each compressed video are acquired at a fixed sampling rate. Joint analysis is applied concurrently and in parallel to the compressed videos to determine a variable and non-uniform temporal sampling rate for each compressed video so that a combined distortion is minimized and a combined frame rate constraint is satisfied. Each compressed video is then sampled at the associated variable and non-uniform temporal sampling rate to produce output compressed videos having variable temporal resolutions.

An optical receiver for use in an optical communications system in which an analog signal is transmitted over an optical fiber including a housing with a photodetector (PD1) coupled to the external optical fiber for receiving an optical communications signal; and a transimpedance amplifier (FET1,FET2) coupled to the electrical output of the photodetector (PD1) and having a bias current in a second stage (FET3) set to a predetermined value that minimizes the distortion in the output signal created in a first amplification stage (FET1,FET2) by a cancellation effect.

An ultra directional speaker system and a signal processing method thereof are disclosed. In accordance with the present invention, the pre-distortion compensation may be applied to the input signal in real time and a signal to be modulated is subjected to a VSB modulation to minimize the distortion according to a level of the signal, and a signal difference compensation according to an envelop detection of a current signal and a signal in a previous stage.

The present invention provides a valve assembly designed to regulate air flow through a musical instrument and is designed to avoid bumps typically associated with valve construction that result in distortion and other harmful effects on vibrating columns of air that pass there-through. The valve assembly comprises: a cylindrical-shaped valve casing having openings formed therein that define at least one ingress and at least one egress through which vibrating columns of air pass; and a valve piston received within the valve casing and linearly displaceable therein, the valve piston comprising at least one passageway having a cross-section that is open and u-shaped, whereby other passageways formed in the valve piston are bump-free. The present invention also provides a valve assembly comprising: a cylindrical-shaped valve casing having openings formed therein that define at least one ingress and at least one egress through which vibrating columns of air pass; and a rotary valve received within the valve casing and rotatably displaceable therein. The rotary valve comprises a pair of passageways formed asymmetrically in the body of the rotary valve and at least one of the pair of passageways having a substantially circular cross-section. The rotary valve being further characterized with a land between opening of one of the pair of passageways and the absence of a land for the other of the pair of passageways so as to minimize distortion.

An attenuation circuit uses a voltage controlled variable resistance transistor as a signal attenuator for receivers operating in the zero Hz to about 30 MHz range. The transistor functions in the linear region to linearize the transistor resistance characteristics used for signal attenuation. In an exemplary application, the attenuation circuit is used as an RF attenuator for AM radio broadcast receivers and amplifiers with automatic gain control. Multiple attenuation circuits can be coupled in parallel, each attenuation circuit having a different sized variable resistance transistor, to form sequentially activated stages that increase the range of attenuation while minimizing distortion.