Patent application number | Description | Published |
20080255832 | Scalable Encoding Apparatus and Scalable Encoding Method - A scalable encoding apparatus wherein stereo audio signals can be scalable encoded by use of a CELP encoding to improve the encoding efficiency. In the apparatus, an adder and a multiplier obtain an average of first and second channel signals as a monophonic signal. A CELP encoding part performs a CELP encoding of the monophonic signal. A first channel difference information encoding part performs an encoding of the first channel signal in conformance with the CELP encoding and obtains a difference between a resulting encoded parameter and an encoded parameter outputted from the CELP encoding part. The first channel difference information encoding part then encodes this difference and outputs the resulting encoded parameter. | 10-16-2008 |
20080255833 | Scalable Encoding Device, Scalable Decoding Device, and Method Thereof - A scalable encoding device for realizing scalable encoding by CELP encoding of a stereo sound signal and improving the encoding efficiency. In this device, an adder and a multiplier obtain an average of a first channel signal CH | 10-16-2008 |
20080281587 | Audio Encoding Apparatus, Audio Decoding Apparatus, Communication Apparatus and Audio Encoding Method - An audio encoding apparatus and the like are disclosed which can improve the sound quality of encoded audio signals even in a case of scalable CELP encoding the audio signals in sections that vary with time. In this apparatus, an enhancement layer extended adaptive codebook generating part ( | 11-13-2008 |
20080281589 | Noise Suppression Device and Noise Suppression Method - There is disclosed a noise suppression device capable of improving the noise suppression accuracy while reducing the audio distortion. In this device, a suppression unit suppresses a noise component from the audio power spectrum by using the detection result of the audio-existing band and the noise band in the audio power spectrum including the noise component. A pitch harmonic structure extracting unit ( | 11-13-2008 |
20090030677 | SCALABLE ENCODING APPARATUS, SCALABLE DECODING APPARATUS, AND METHODS OF THEM - A scalable encoding apparatus capable of suppressing the quality degradation of a decoded signal without increasing the bit rate. In this apparatus, a core layer encoding part ( | 01-29-2009 |
20090041255 | SCALABLE ENCODING DEVICE AND SCALABLE ENCODING METHOD - There is disclosed a scalable encoding device capable of preventing sound quality deterioration of a decoded signal, reducing the encoding rate, and reducing the circuit size. The scalable encoding device includes: a first layer encoder ( | 02-12-2009 |
20090043572 | PULSE ALLOCATING METHOD IN VOICE CODING - A pulse allocating method capable of coding stereophonic voice signals efficiently. In the fixed code note retrievals (ST | 02-12-2009 |
20090055169 | VOICE ENCODING DEVICE, AND VOICE ENCODING METHOD - A voice encoding device capable of generating a modulated proper monaural signal enriched in clearness and understandability, when the monaural signal is to be generated from a stereophonic signal. In this device, a weighting unit ( | 02-26-2009 |
20090055172 | SOUND ENCODING DEVICE AND SOUND ENCODING METHOD - A sound encoding device for efficiently encoding stereophonic sound. In this sound encoding device, a prediction parameter analyzing section ( | 02-26-2009 |
20090070107 | SCALABLE ENCODING DEVICE AND SCALABLE ENCODING METHOD - Provided is a scalable encoding device capable of improving quality of a decoded signal without increasing an encoding amount and compensating data with a sufficient quality upon data loss. In the scalable encoding device, an extension layer bit distribution calculation unit ( | 03-12-2009 |
20090076809 | AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD - There is provided an audio encoding device capable of effectively encoding stereo audio in audio encoding having monaural-stereo scalable configuration. In this device, a correlation degree comparison unit ( | 03-19-2009 |
20090083041 | AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD - There is provided an audio encoding device capable of effectively encoding a stereo audio even when a correlation between channels of the stereo audio is small. In the device, a monaural signal generation unit ( | 03-26-2009 |
20090119111 | STEREO ENCODING DEVICE, AND STEREO SIGNAL PREDICTING METHOD - A prediction performance between the individual channels of a stereo signal is improved to improve the sound quality of a decoded signal. An LPF ( | 05-07-2009 |
20090150162 | STEREO ENCODING APPARATUS, STEREO DECODING APPARATUS, AND THEIR METHODS - A stereo audio encoding apparatus capable of preventing degradation of the sound quality of a decoded signal, while reducing the encoding bit rate. In the apparatus, a spatial information analyzing part ( | 06-11-2009 |
20090248404 | LOST FRAME COMPENSATING METHOD, AUDIO ENCODING APPARATUS AND AUDIO DECODING APPARATUS - A frame loss compensating method wherein even when audio codec, which utilizes past sound source information of adaptive codebook or the like, is used as a main layer, the degradation in quality of the decoded audio of a lost frame and following frames is small. In this method, it is assumed that a pitch period ‘T’ and a pitch gain ‘g’ have been obtained as encoded information of a current frame. The sound source information of a preceding frame is expressed by use of a single pulse, and a pulse position ‘b’ and a pulse amplitude ‘a’ are used as encoded information for compensation. Then, an encoded sound source signal is a vector that builds up a pulse having an amplitude ‘a’ at a position that precedes by ‘b’ from the front position of the current frame. This vector is used as the content of the adaptive codebook, so that a vector, which builds up a pulse having an amplitude (g×a) at the position of the current frame (T−b), can be used as an adaptive codebook vector at the current frame. This vector is used to synthesize a decoded signal. The pulse position ‘b’ and pulse amplitude ‘a’ are then decided such that a difference between the synthesized signal and an input signal becomes minimum. | 10-01-2009 |
20090262945 | STEREO ENCODING DEVICE, STEREO DECODING DEVICE, AND STEREO ENCODING METHOD - There is disclosed a stereo encoding device capable of accurately encoding a stereo signal at a low bit rate and suppressing delay in audio communication. The device performs monaural encoding in its first layer ( | 10-22-2009 |
20090265167 | SPEECH ENCODING APPARATUS AND SPEECH ENCODING METHOD - Disclosed is an audio encoding device capable of adjusting a spectrum inclination of a quantized noise without changing the Formant weight. The device includes: an HPF ( | 10-22-2009 |
20090271184 | SCALABLE ENCODING DEVICE, AND SCALABLE ENCODING METHOD - Disclosed is a scalable encoding device capable of reducing an encoding rate thereby to reduce a circuit scale while preventing sound quality deterioration of a decoded signal. In this device, an extension layer is coarsely divided into a system for processing a first channel and a system for processing a second channel. A sound source prediction unit ( | 10-29-2009 |
20090276210 | STEREO AUDIO ENCODING APPARATUS, STEREO AUDIO DECODING APPARATUS, AND METHOD THEREOF - Disclosed is a stereo speech decoding device and others capable of reducing a stereo speech encoding bit rate and suppressing degradation of speech quality. In this device, a section | 11-05-2009 |
20090281795 | SPEECH ENCODING APPARATUS, SPEECH DECODING APPARATUS, SPEECH ENCODING METHOD, AND SPEECH DECODING METHOD - There is provided an audio encoding device for correcting the component having insufficient encoding capability in the core layer by an extended layer. In this device, a core layer encoding unit ( | 11-12-2009 |
20090292537 | WIDE-BAND ENCODING DEVICE, WIDE-BAND LSP PREDICTION DEVICE, BAND SCALABLE ENCODING DEVICE, WIDE-BAND ENCODING METHOD - There is provided a wide-band LSP prediction device and others capable of predicting a wide-band LSP from a narrow-band LSP with a high quantization efficiency and a high accuracy while suppressing the size of a conversion table correlating the narrow-band LSP to the wide-band LSP. In this device, a non-linear prediction unit ( | 11-26-2009 |
20090319264 | SPEECH DECODING APPARATUS, SPEECH ENCODING APPARATUS, AND LOST FRAME CONCEALMENT METHOD - Disclosed is a sound decoding device capable of improving the lost frame compensation performance and improving quality of the decoded sound. In this device, a rise frame sound source compensation unit ( | 12-24-2009 |
20090326930 | SPEECH DECODING APPARATUS AND SPEECH ENCODING APPARATUS - Provided is an audio decoding device capable of suppressing an information amount for a lost frame compensation process and encoding efficiency. In this device, a decoded sound source generation unit ( | 12-31-2009 |
20100049509 | AUDIO ENCODING DEVICE AND AUDIO DECODING DEVICE - Disclosed are an audio encoding device and an audio decoding device which reduce degradation of subjective quality of a decoding signal caused by power mismatch of a decoding signal which is generated by a concealing process upon disappearance of a frame. When a frame is lost, a past encoding parameter is used to obtain a concealed LPC of the current frame and a concealed sound source parameter. A normal CELP decoding is performed from the obtained concealed sound source parameter. Correction is performed by using a conceal parameter on the obtained concealed LPC and the concealed sound source signal. The power of the corrected concealed sound source signal is adjusted to match a reference sound source power. A filter gain of the synthesis filter is adjusted so as to adjust the power of a decoded sound signal to the power of a decoded sound signal during an error-free state. Moreover, a synthesis filter gain adjusting coefficient is calculated by using an estimated normalized residual power so that a filter gain of a synthesis filter formed by using a concealed LPC is a filter gain during an error-free state. | 02-25-2010 |
20100079587 | ENDOSCOPE SYSTEM - A small diameter of an endoscope is maintained, and both normal imaging with a visible light and fluorescence imaging can be performed. An endoscope system is provided in which a plurality of imaging devices that detect a reflected light of an illumination light reflected by a somatoscopy part or an emitted light emitted by the somatoscopy part are arranged in series in a distal end portion of an endoscope, each of the plurality of imaging devices includes a light splitting device that deflects 90° a part of the reflected light or the emitted light and transmits a part of the reflected light or the emitted light and an image pickup device that detects the reflected light or the emitted light deflected 90°, a rearmost imaging device includes an optical path changing device that deflects 90° the reflected light or the emitted light and an image pickup device that detects the reflected light or the emitted light deflected 90°, and an observation optical member is provided in which the light splitting device and the optical path changing device are arranged in series. | 04-01-2010 |
20100094623 | ENCODING DEVICE AND ENCODING METHOD - Provided is an encoding device which performs a fixed sound source codebook search with a small calculation amount even in a low-bit rate sound encoding without lowering the encoding efficiency. In the encoding device, a threshold value calculation unit ( | 04-15-2010 |
20100106493 | ENCODING DEVICE AND ENCODING METHOD - Provided is an encoding device which can achieve both of highly effective encoding/decoding and high-quality decoding audio when executing a scalable stereo audio encoding by using MDCT and ICP. In the encoding device, an MDCT conversion unit ( | 04-29-2010 |
20100153099 | SPEECH ENCODING APPARATUS AND SPEECH ENCODING METHOD - A speech coder and so forth for preventing deterioration of the quality of a reproduced speech signal while reducing the coding rate. In a speech signal modifying section ( | 06-17-2010 |
20100153102 | SCALABLE CODING APPARATUS AND SCALABLE CODING METHOD - A scalable coding apparatus is provided to suppress deterioration of a quality of a coded signal in a normal frame next to a frame compensated for the occurrence of a data loss. The scalable coding apparatus is provided with a core-layer coding section ( | 06-17-2010 |
20100250244 | ENCODER AND DECODER - There is provided an encoder capable of improving inter-channel prediction (ICP) performance in scalable stereo sound encoding using an ICP. In the encoder, ICP analysis units ( | 09-30-2010 |
20100262421 | ENCODING DEVICE, DECODING DEVICE, AND METHOD THEREOF - Provided is an encoding device which improves the sound quality of a stereo signal while maintaining a low bit rate. The encoding device includes: an LP inverse filter ( | 10-14-2010 |
20100280822 | STEREO SOUND DECODING APPARATUS, STEREO SOUND ENCODING APPARATUS AND LOST-FRAME COMPENSATING METHOD - A stereo sound decoding apparatus wherein lost-frame compensation performance has been improved to enhance the quality of decoded sounds. In this stereo sound decoding apparatus, a sound decoding part ( | 11-04-2010 |
20110064229 | AUDIO SIGNAL DECODING DEVICE AND BALANCE ADJUSTMENT METHOD FOR AUDIO SIGNAL DECODING DEVICE - Fluctuation in decoded signal localization is suppressed to maintain the feel of stereo. A selection unit ( | 03-17-2011 |
20110125495 | QUANTIZER, ENCODER, AND THE METHODS THEREOF - Disclosed are a quantizer, encoder, and the methods thereof, wherein the computational load is reduced when the values related to the transform coefficients of the principal component analysis transform are quantized when a principal component analysis transform is applied to code stereo. A quantizer ( | 05-26-2011 |
20110202336 | FIXED CODEBOOK SEARCHING APPARATUS AND FIXED CODEBOOK SEARCHING METHOD - A fixed codebook searching apparatus, includes a convolution operator, implemented by at least one processor, that convolves an impulse response of a perceptually weighted synthesis filter with an impulse response vector that has values at negative times, to generate a second impulse response vector that has values at negative times. A matrix generator, implemented by at least one processor, generates a Toeplitz-type convolution matrix using the second impulse response vector generated by the convolution operator. A searcher, implemented by at least one processor, performs a codebook search by maximizing a term using the Toeplitz-type convolution matrix. | 08-18-2011 |
20110264457 | ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD - An encoding apparatus and method for generating low-frequency-band encoding information and high-frequency-band encoding information from an original signal. The encoding apparatus includes a first spectrum calculator that calculates a first spectrum of a low frequency band from a decoded signal of the low-frequency-band encoding information, a second spectrum calculator that calculates a second spectrum from the original signal, an estimator that divides a high frequency band of the second spectrum into a plurality of bands and estimates the second spectrum included in each band, using the first spectrum, and a first error component encoder that encodes a first error component between the high frequency band of the second spectrum and an estimated spectrum. A corresponding decoding apparatus and method provides decoding. | 10-27-2011 |
20120238821 | OPTICAL CONNECTOR AND ENDOSCOPE SYSTEM - Provided is an optical connector including: an SI-type light source side optical fiber which is disposed on the light source side and an SI-type light receiving side optical fiber which is disposed on the light receiving side. Both optical fibers are optically coupled to each other by disposing an end surface of the light source side optical fiber and an end surface of the light receiving side optical fiber so as to face each other. The light source side optical fiber and the receiving side optical fiber are attachable to and detachable from each other. The light source side optical fiber includes a taper portion in which the diameter of the core portion increases toward the end surface of the light source side optical fiber. | 09-20-2012 |
20120245420 | ENDOSCOPE APPARATUS - To prevent excitation light output from an output end of a light guiding portion causing damage to the eye when the light guiding portion which guides the special light output from a light source is detached from the insertion portion. Provided is an endoscope apparatus including: an insertion portion that is inserted into a body so as to irradiate special light to a subject observation portion inside the body and receives light output from the subject observation portion by the irradiation of the special light; and a light guiding portion that is optically connected to the insertion portion and guides the special light output from a light source to the insertion portion, wherein an output end for the special light in the light guiding portion is equipped with a diffusing portion that diffuses the special light guided by the light guiding portion. | 09-27-2012 |
20130053643 | ENDOSCOPE SYSTEM AND METHOD OF CONTROLLING ENDOSCOPE SYSTEM - An endoscope system including an endoscope insertion part to be inserted into a body cavity via a trocar stabbed in a body wall, the endoscope system comprising:
| 02-28-2013 |