| Patent application number | Description | Published |
|---|
| 20090196525 | Gradation converting device, gradation converting method, and computer program - A gradation converting device that converts gradation of an image includes: a dither unit that applies dither to the image by adding random noise to a pixel value forming the image; and a one-dimensional ΔΣ modulation unit that applies one-dimensional ΔΣ modulation to the image applied with the dither. | 08-06-2009 |
| 20090201516 | Gradation converting device, image processing apparatus, image processing method, and computer program - An image processing apparatus includes: a filter-coefficient storing unit that stores filter coefficients respectively associated with spatial frequencies, which are the numbers of strips displayed per unit angle with respect to an angle of field of a display apparatus; a viewing-condition determining unit that determines, as viewing conditions, a viewing distance between a viewer and the display apparatus and pixel density of the display apparatus; a filter-coefficient setting unit that sets a filter coefficient selected on the basis of a spatial frequency calculated from the viewing conditions among the stored filter coefficients; and a gradation modulating unit including a quantizing unit that quantizes a pixel value in a predetermined coordinate position in an image signal and outputs the pixel value as a quantized pixel value in the predetermined coordinate position, the gradation modulating unit gradation-modulating the image signal by multiply-accumulating a set filter coefficient with respect to quantization errors caused by the quantizing unit to feedback the quantization errors to an input side of the quantizing unit. | 08-13-2009 |
| 20090208022 | HEAD-RELATED TRANSFER FUNCTION MEASUREMENT METHOD, HEAD-RELATED TRANSFER FUNCTION CONVOLUTION METHOD, AND HEAD-RELATED TRANSFER FUNCTION CONVOLUTION DEVICE - A head-related transfer function measurement method includes the steps of: first measuring, including placing an acousto-electric conversion unit nearby both ears of a listener where placement of an electro-acoustic conversion unit is assumed, picking up sound waves emitted at a perceived sound source position with the acousto-electric conversion unit in a state with a dummy head or a human at the listener position, and measuring a head-related transfer function from only the sound waves directly reaching the acousto-electric conversion unit; second measuring, including picking up sound waves emitted at a perceived sound source position with the acousto-electric conversion unit, with no dummy head or human at the listener position, and measuring a natural-state transfer property from only the sound waves directly reaching the acousto-electric conversion unit; normalizing the head-related transfer function with the natural-state transfer property to obtain a normalized head-related transfer function; which is stored in a storage unit. | 08-20-2009 |
| 20090214045 | HEAD-RELATED TRANSFER FUNCTION CONVOLUTION METHOD AND HEAD-RELATED TRANSFER FUNCTION CONVOLUTION DEVICE - A head-related transfer function (HRTF) convolution method arranged, when an audio signal is reproduced acoustically by an electro-acoustic conversion unit disposed in a nearby position of both ears of a listener, to convolute an HRTF into the audio signal, which allows the listener to listen to the audio signal such that a sound image is localized in a perceived virtual sound image localization position, the method including the steps of: measuring, when a sound source is disposed in the virtual sound image localization position, and a sound-collecting unit is disposed in the position of the electro-acoustic conversion unit, a direct-wave direction HRTF regarding the direction of a direct wave, and reflected-wave direction HRTFs regarding the directions of selected one or more reflected waves, from the sound source to the sound-collecting unit, separately beforehand; and convoluting the obtained direct-wave direction HRTF, and the reflected-wave direction HRTFs into the audio signal. | 08-27-2009 |
| 20100079482 | Gradation conversion device, gradation conversion method, and program - A gradation conversion device that converts a gradation of an image, includes: dither means for dithering the image by adding random noise to pixel values forming the image; and one-dimensional ΔΣ modulation means for performing one-dimensional ΔΣ modulation on the dithered image. | 04-01-2010 |
| 20100165409 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - The present invention relates to an image processing apparatus, an image processing method, and a program capable of improving the visual quality of an image after grayscale conversion. | 07-01-2010 |
| 20100265399 | VIDEO/AUDIO INPUT/OUTPUT SYSTEM - Provided is a video/audio input/output system including a video/audio input system including a video input device and a plurality of audio input devices and a video/audio output system including a video output device having a display surface, the video output device being for outputting a video on the display surface based on a video signal obtained by the video input device, and a plurality of audio output devices respectively corresponding to the plurality of audio input devices. The plurality of audio output devices are each installed at a location determined by decreasing or increasing, according to a reduction rate or an enlargement rate of the video to a real size and with a centre of the video as a reference, a distance from the centre of the video to a foot of a perpendicular drawn from the location of installation of the corresponding audio input device to the display surface, and the plurality of audio output devices output audio based on the audio signals obtained by the corresponding audio input devices. | 10-21-2010 |
| 20100322428 | AUDIO SIGNAL PROCESSING DEVICE AND AUDIO SIGNAL PROCESSING METHOD - An audio signal processing device includes: head related transfer function convolution processing units convoluting head related transfer functions with audio signals of respective channels of plural channels, which allow the listener to listen to sound so that sound images are localized at assumed virtual sound image localization positions concerning respective channels of the plural channels of two or more channels when sound is reproduced by electro-acoustic transducer means; and 2-channel signal generation means for generating 2-channel audio signals to be supplied to the electro-acoustic transducer means from audio signals of plural channels from the head related transfer function convolution processing units, wherein, in the head related transfer function convolution processing units, at least a head related transfer function concerning direct waves from the assumed virtual image localization positions concerning a left channel and a right channel in the plural channels to both ears of the listener is not convoluted. | 12-23-2010 |
