Patent application number | Description | Published |
20090122182 | SIGNAL PROCESSING DEVICE - A signal processing device ( | 05-14-2009 |
20090240503 | ACOUSTIC SIGNAL PROCESSING APPARATUS AND ACOUSTIC SIGNAL PROCESSING METHOD - To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic. | 09-24-2009 |
20090259478 | Audio Decoding Apparatus and Decoding Method and Program - An energy corrector ( | 10-15-2009 |
20090262949 | MULTI-CHANNEL ACOUSTIC SIGNAL PROCESSING DEVICE - Provided is a multi-channel acoustic signal processing device by which loads of arithmetic operations are reduced. The multi-channel acoustic signal processing device ( | 10-22-2009 |
20090326934 | AUDIO DECODING DEVICE, AUDIO DECODING METHOD, PROGRAM, AND INTEGRATED CIRCUIT - An audio decoding device of the present invention includes: a decoding unit decoding a stream to a spectrum coefficient, and outputting stream information when a frame included in the stream cannot be decoded; an orthogonal transformation unit transforming the spectrum coefficient to a time signal; a correction unit generating a correction time signal based on an output waveform within a reference section that is in a section that overlaps between an error frame section to which the stream information is outputted and an adjacent frame section and that is a section in the middle of the adjacent frame section, when the decoding unit outputs the stream information: and an output unit generating the output waveform by synthesizing the correction time signal and the time signal. | 12-31-2009 |
20100063828 | STREAM SYNTHESIZING DEVICE, DECODING UNIT AND METHOD - To provide an enhanced true-to-life atmosphere enjoyed in multipoint connecting, and reduce a calculation load at a multipoint connection unit, as well. | 03-11-2010 |
20100198589 | AUDIO CODING APPARATUS, AUDIO DECODING APPARATUS, AUDIO CODING AND DECODING APPARATUS, AND TELECONFERENCING SYSTEM - The delay in a multi-channel audio coding apparatus and a multi-channel audio decoding apparatus is reduced. The audio coding apparatus includes: a downmix signal generating unit ( | 08-05-2010 |
20100235171 | AUDIO DECODER - Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder ( | 09-16-2010 |
20110029113 | COMBINATION DEVICE, TELECOMMUNICATION SYSTEM, AND COMBINING METHOD - A combination device ( | 02-03-2011 |
20110051940 | DECODING DEVICE, CODING AND DECODING DEVICE, AND DECODING METHOD - There was no method of positioning virtual sound sources of object signals obtained from received coded object information, in a listening space on a receiving site side. Provided are an object decoding unit ( | 03-03-2011 |
20110182432 | CODING APPARATUS AND DECODING APPARATUS - A coding apparatus which suppresses an extreme increase in a bit rate, includes: a downmixing and coding unit ( | 07-28-2011 |
20110268279 | AUDIO ENCODING DEVICE, DECODING DEVICE, METHOD, CIRCUIT, AND PROGRAM - Provided is an encoding device ( | 11-03-2011 |
20120022676 | AUDIO SIGNAL PROCESSING APPARATUS, AUDIO CODING APPARATUS, AND AUDIO DECODING APPARATUS - To provide an audio signal processing apparatus which can perform, with low operation amount, audio signal processing that is either time stretch and/or compression processing or frequency modulation processing. The audio signal processing apparatus is intended to transform an input audio signal sequence using a predetermined adjustment factor. The audio signal processing apparatus includes a filter bank ( | 01-26-2012 |
20120136670 | BANDWIDTH EXTENSION METHOD, BANDWIDTH EXTENSION APPARATUS, PROGRAM, INTEGRATED CIRCUIT, AND AUDIO DECODING APPARATUS - To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum; pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal; a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain; the high frequency QMF spectrum is modified; and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum. | 05-31-2012 |
20120185241 | AUDIO DECODING APPARATUS, AUDIO CODING APPARATUS, AND SYSTEM COMPRISING THE APPARATUSES - An audio decoding apparatus comprises: a plurality of decoding units; a band replicating unit which processes a decoded signal obtained when a corresponding decoding unit decodes a coded signal, according to a scheme specified by transmitted information; and an information transmitting unit which transmits, to a signal processing unit, information identifying the corresponding decoding unit from among the plurality of decoding units. | 07-19-2012 |
20130090929 | HYBRID AUDIO ENCODER AND HYBRID AUDIO DECODER - Provided are a new hybrid audio decoder and a new hybrid audio encoder having block switching for speech signals and audio signals. Currently, very low bitrate audio coding methods for speech and audio signal are proposed. These audio coding methods cause very long delay. Generally, in coding an audio signal, algorithm delay tends to be long to achieve higher frequency resolution. In coding a speech signal, the delay needs to be reduced because the speech signal is used for telecommunication. To balance fine coding quality for these two kinds of input signals with very low bitrate, this invention provides a combination of a low delay filter bank like AAC-ELD and a CELP coding method. | 04-11-2013 |
20130144611 | CODING DEVICE, DECODING DEVICE, CODING METHOD, AND DECODING METHOD - A coding device includes: a pitch contour detection unit which detects a pitch contour of an input audio signal; a dynamic time warping unit which determines the number of pitch nodes based on the pitch contour and generates a first time warping parameter including information indicating the determined number of pitch nodes, a pitch change position, and a pitch change ratio; a first encoder which codes the first time warping parameter; a time warping unit which corrects pitch, using the information obtained from the first time warping parameter, to approximate the pitches of the number of pitch nodes to a predetermined reference value; a second encoder which codes the input audio signal at the corrected pitch; and a multiplexer which multiplexes the coded time warping parameter and the coded audio signal to generate a bitstream. | 06-06-2013 |
20140058737 | HYBRID SOUND SIGNAL DECODER, HYBRID SOUND SIGNAL ENCODER, SOUND SIGNAL DECODING METHOD, AND SOUND SIGNAL ENCODING METHOD - A hybrid sound signal decoder decodes a bitstream including audio frames encoded by an audio encoding process using a low delay filter bank and speech frames encoded by a speech encoding process using linear prediction coefficients. When a current frame to be decoded is an ith frame which is an initial speech frame after switching from an audio frame to a speech frame, the hybrid sound signal decoder generates sub-frames which are a signal corresponding to an i−1th frame before being encoded, using a sub-frame which is a signal generated using a signal of the i−1th frame before being encoded, the signal of the i−1th frame being obtained by decoding the ith frame. | 02-27-2014 |
20140074489 | SOUND SIGNAL HYBRID ENCODER, SOUND SIGNAL HYBRID DECODER, SOUND SIGNAL ENCODING METHOD, AND SOUND SIGNAL DECODING METHOD - A sound signal hybrid encoder includes: a signal analysis unit which determines a scheme for encoding a frame included in a sound signal; an LFD encoder which encodes a frame to generate an LFD frame; an LP encoder which encodes a frame to generate an LP frame; a switching unit which switches between the encoders according to a result of the determination by the signal analysis unit; and an AC signal generation unit which generates an AC signal according to a scheme selected from among schemes, outputs the generated AC signal, and also outputs an AC flag indicating the selected scheme. | 03-13-2014 |
20140211945 | AUDIO RENDERING DEVICE AND AUDIO RENDERING METHOD - An audio rendering device which uses multichannel speakers includes: a first delay computation unit which computes, based on rendering information about the multichannel speakers, a first delay corresponding to a primary wavefront which propagates in a predetermined traveling direction from a sound source that is each of speakers included in the multichannel speakers; a second delay computation unit which computes, based on the rendering information about the multichannel speakers, a second delay corresponding to a secondary wavefront which is generated by the primary wavefront and has a scattering wavefront; an addition unit which adds up the first delay and the second delay to compute a total delay; and a delay filter which applies the total delay to an input audio signal to generate a multichannel audio signal for use in rendering with the multichannel speakers, and outputs the multichannel audio signal to the multichannel speakers. | 07-31-2014 |
20150039323 | ENCODING AND DECODING SYSTEM, DECODING APPARATUS, ENCODING APPARATUS, ENCODING AND DECODING METHOD - An encoding and decoding system includes: a characteristic determining unit which determines whether a sound signal is a speech signal or an audio signal; an encoder which encodes the sound signal into an encoded signal, based on a determination by the characteristic determining unit; a transmitting unit which transmits the encoded signal; a receiving unit which receives the encoded signal; a decoder which decodes the encoded signal; and a packet loss detecting unit which detects a loss of data of the encoded signal and transmits a notification indicating the loss of the data to the characteristic determining unit. Upon receiving the notification indicating the loss of the data, the characteristic determining unit causes the encoder to encode the sound signal portion into a signal portion composed of independently decodable frames. | 02-05-2015 |