| 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 |
